WorldWideScience

Sample records for column locking plate

  1. The concept of locking plates.

    Science.gov (United States)

    Cronier, P; Pietu, G; Dujardin, C; Bigorre, N; Ducellier, F; Gerard, R

    2010-05-01

    After a short historical review of locking bone plates since their inception more than a century ago to the success of the concept less than 15 years ago with today's plates, the authors present the main locking mechanisms in use. In the two broad categories - plates with fixed angulation and those with variable angulation - the screw head is locked in the plate with a locknut by screwing in a threaded chamber on the plate or by screwing through an adapted ring. The authors then provide a concrete explanation, based on simple mechanical models, of the fundamental differences between conventional bone plates and locking plates and why a locking screw system presents greater resistance at disassembly, detailing the role played by the position and number of screws. The advantages of epiphyseal fixation are then discussed, including in cases of mediocre-quality bone. For teaching purposes, the authors also present assembly with an apple fixed with five locking screws withstanding a 47-kg axial load with no resulting disassembly. The principles of plate placement are detailed for both the epiphysis and diaphysis, including the number and position of screws and respect of the soft tissues, with the greatest success assured by the minimally invasive and even percutaneous techniques. The authors then present the advantages of locking plates in fixation of periprosthetic fractures where conventional osteosynthesis often encounters limited success. Based on simplified theoretical cases, the economic impact in France of this type of implant is discussed, showing that on average it accounts for less than 10% of the overall cost of this pathology to society. Finally, the possible problems of material ablation are discussed as well as the means to remediate these problems.

  2. Locking plate osteosynthesis of clavicle fractures

    DEFF Research Database (Denmark)

    Fridberg, Marie; Ban, Ilija; Issa, Zaid

    2013-01-01

    PURPOSE: Locking plate osteosynthesis has become the preferred method for operative treatment of clavicle fractures. The method offers stable fixation, and would theoretically be associated with a low rate of fracture-related complications and reoperations. However, this remains to be explored...... in a large cohort, and our purpose was to assess the overall rates of complications and reoperations following locking plate osteosynthesis of mid-shaft clavicle fractures. METHODS: We identified all locking plate osteosynthesis of mid-shaft clavicle fractures operated upon in our department from January...... 2008 to November 2010 (n = 114). Nine patients did not attend the follow-up at our institution. The study group of 105 fractures (104 patients, 86 males) had a median age of 36 years (14-75 years). Follow-up ranged from 0.5 to 3.5 years. No patients were allowed to load the upper extremity for six...

  3. Locking plate fixation for proximal humerus fractures.

    LENUS (Irish Health Repository)

    Burke, Neil G

    2012-02-01

    Locking plates are increasingly used to surgically treat proximal humerus fractures. Knowledge of the bone quality of the proximal humerus is important. Studies have shown the medial and dorsal aspects of the proximal humeral head to have the highest bone strength, and this should be exploited by fixation techniques, particularly in elderly patients with osteoporosis. The goals of surgery for proximal humeral fractures should involve minimal soft tissue dissection and achieve anatomic reduction of the head complex with sufficient stability to allow for early shoulder mobilization. This article reviews various treatment options, in particular locking plate fixation. Locking plate fixation is associated with a high complication rate, such as avascular necrosis (7.9%), screw cutout (11.6%), and revision surgery (13.7%). These complications are frequently due to the varus deformation of the humeral head. Strategic screw placement in the humeral head would minimize the possibility of loss of fracture reduction and potential hardware complications. Locking plate fixation is a good surgical option for the management of proximal humerus fractures. Complications can be avoided by using better bone stock and by careful screw placement in the humeral head.

  4. [Tibiotalocalcaneal arthrodesis using a humeral locking plate].

    Science.gov (United States)

    Cabrera Méndez, M P; Gamba, C; Hernández, E; Molano, J; Andrade, J C

    2016-01-01

    To describe the results of tibiotalocalcáneal arthrodesis (TTC) using a humeral locking plate. A retrospective, observational study was conducted between January 2007 and December 2013 in the Hospital Militar Central de Bogotá. The study included patients with symptomatic osteoarthritis diagnosed clinically and radiologically, and who underwent TTC arthrodesis using a humeral locking plate with a minimum follow up of 6 months. The total number patients was 35, of whom 7 (20%) were women and 28 (80%) men, with a mean age 36.3 years (19.77). 74% with post-traumatic arthritis, most of them secondary to gunshot wounds and fragmentation weapons, and neuropathic in 20%. An autogenous graft was used in 13 cases, and 14 cases using both, with a mean consolidation time of 4.37 months. Complications include, delayed union in 3 cases, and surgical site infection in 4. The postoperative functionality (AOFAS) mean was 66.7/100 points, with a score of 2.35 on a visual analogue pain scale. TTC arthrodesis using a humeral locking plate is a suitable option for fixing this type of arthrodesis, with a low rate of complications, and postoperative results that revealed satisfactory improvement in pain and consolidation. Copyright © 2015 SECOT. Published by Elsevier Espana. All rights reserved.

  5. Locking plates in proximal humerus fractures.

    Science.gov (United States)

    Strohm, P C; Helwig, P; Konrad, G; Südkamp, N P

    2007-12-01

    It is well known that proximal humerus fractures are among the three most frequent fracture types. Epidemiological invetsigations show that in people elder than 60 years the fracture of the proximal humerus is more frequent than fractures of the hip region (17). Over the last decades several techniques have been applied for treatment of proximal humerus fractures. Widely accepted is the initiation of a conservative treatment regimen for undisplaced fractures, however, the standard treatment for displaced fractures, especially three and four part fractures, is still the center of scientific debate. Many different implants have been tested and investigated, thus demonstrating lack of sufficient results. Over the last years the development of angle stable, locking implants started and clinical studies demonstrated encouraging results. In our clinic the locking proximal humerus plate and the PHILOS plate advanced to the implant of choice for treatment of displaced proximal humerus fractures. There are still cases of implant failure and humerus head necrosis, but most of these complications were caused by the fracture type and not an implant specific problem. However the overall results with these new implants are encouraging. Key words: locking plates, proximal humerus fracture, humerus, humerus fracture, PHILOS, PHP.

  6. Development of site-specific locking plates for acetabular fractures.

    Science.gov (United States)

    Xu, Meng; Zhang, Li-Hai; Zhang, Ying-Ze; He, Chun-Qing; Zhang, Li-Cheng; Wang, Yan; Tang, Pei-Fu

    2013-05-01

    Site-specific locking plates have gained popularity for the treatment of fractures. However, the clinical use of a site-specific locking plate for acetabular fractures remains untested due to production limits. To design a universal site-specific locking plate for acetabular fractures, the 3-dimensional (3D) photographic records of 171 pelvises were retrospectively studied to generate a universal posterior innominate bone surface. Using 3D photographical processing software, the 3D coordinate system was reset according to bony landmarks and was scaled based on the acetabular diameter to allow a direct comparison between surfaces. The measured surface was separated into measurement units. At each measurement unit, the authors calculated the average z-axis values in all samples and obtained the 3D coordinate values of the point cloud that could be reconstructed into the universal surface. A plate was subsequently designed in 3D photographical processing software, and the orientation and distribution of locking screws was included. To manufacture a plate, the data were entered into Unigraphics NX version 6.0 software (Siemens PLM Software, Co, Ltd, Plano, Texas) and a CNC digital milling machine (FANUC Co, Ltd, Yamanashi, Japan). The resulting locking plate fit excellently with the reduced bone surface intraoperatively. Plate contouring was avoided intraoperatively. Universal 3.5-mm locking screws locked successfully into the plate, and their orientations were consistent with the design. No screw yielded to acetabular penetration. This method of designing a site-specific acetabular locking plate is practical, and the plates are suitable for clinical use. These site-specific locking plates may be an option for the treatment of acetabular fractures, particularly in elderly patients.

  7. Biomechanical Properties of 3-Dimensional Printed Volar Locking Distal Radius Plate: Comparison With Conventional Volar Locking Plate.

    Science.gov (United States)

    Kim, Sung-Jae; Jo, Young-Hoon; Choi, Wan-Sun; Lee, Chang-Hun; Lee, Bong-Gun; Kim, Joo-Hak; Lee, Kwang-Hyun

    2017-09-01

    This study evaluated the biomechanical properties of a new volar locking plate made by 3-dimensional printing using titanium alloy powder and 2 conventional volar locking plates under static and dynamic loading conditions that were designed to replicate those seen during fracture healing and early postoperative rehabilitation. For all plate designs, 12 fourth-generation synthetic composite radii were fitted with volar locking plates according to the manufacturers' technique after segmental osteotomy. Each specimen was first preloaded 10 N and then was loaded to 100 N, 200 N, and 300 N in phases at a rate of 2 N/s. Each construct was then dynamically loaded for 2,000 cycles of fatigue loading in each phase for a total 10,000 cycles. Finally, the constructs were loaded to a failure at a rate of 5 mm/min. All 3 plates showed increasing stiffness at higher loads. The 3-dimensional printed volar locking plate showed significantly higher stiffness at all dynamic loading tests compared with the 2 conventional volar locking plates. The 3-dimensional printed volar locking plate had the highest yield strength, which was significantly higher than those of 2 conventional volar locking plates. A 3-dimensional printed volar locking plate has similar stiffness to conventional plates in an experimental model of a severely comminuted distal radius fracture in which the anterior and posterior metaphyseal cortex are involved. These results support the potential clinical utility of 3-dimensional printed volar locking plates in which design can be modified according the fracture configuration and the anatomy of the radius. Copyright © 2017 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.

  8. The strength of polyaxial locking interfaces of distal radius plates.

    Science.gov (United States)

    Hoffmeier, Konrad L; Hofmann, Gunther O; Mückley, Thomas

    2009-10-01

    Currently available polyaxial locking plates represent the consequent enhancement of fixed-angle, first-generation locking plates. In contrast to fixed-angle locking plates which are sufficiently investigated, the strength of the new polyaxial locking options has not yet been evaluated biomechanically. This study investigates the mechanical strength of single polyaxial interfaces of different volar radius plates. Single screw-plate interfaces of the implants Palmar 2.7 (Königsee Implantate und Instrumente zur Osteosynthese GmbH, Allendorf, Germany), VariAx (Stryker Leibinger GmbH & Co. KG, Freiburg, Germany) und Viper (Integra LifeSciences Corporation, Plainsboro, NJ, USA) were tested by cantilever bending. The strength of 0 degrees, 10 degrees and 20 degrees screw locking angle was obtained during static and dynamic loading. The Palmar 2.7 interfaces showed greater ultimate strength and fatigue strength than the interfaces of the other implants. The strength of the VariAx interfaces was about 60% of Palmar 2.7 in both, static and dynamic loading. No dynamic testing was applied to the Viper plate because of its low ultimate strength. By static loading, an increase in screw locking angle caused a reduction of strength for the Palmar 2.7 and Viper locking interfaces. No influence was observed for the VariAx locking interfaces. During dynamic loading; angulation had no influence on the locking strength of Palmar 2.7. However, reduction of locking strength with increasing screw angulation was observed for VariAx. The strength of the polyaxial locking interfaces differs remarkably between the examined implants. Depending on the implant an increase of the screw locking angle causes a reduction of ultimate or fatigue strength, but not in all cases a significant impact was observed.

  9. Outcome of locking compression plates in humeral shaft nonunions

    Directory of Open Access Journals (Sweden)

    Malhar N Kumar

    2013-01-01

    Conclusions: Locking compression plating and cancellous bone grafting is a reliable option for achieving union in humeral diaphyseal nonunion with failed previous internal fixation and results in good functional outcome in patients with higher physiological demands.

  10. FINITE ELEMENT STRUCTURAL & THERMAL ANALYSIS OF LOCK PLATE

    OpenAIRE

    Mr. Ketan Patil; Mr. Roshan Marode; Prof. V. M. Chidri; Prof. A.J. Keche

    2012-01-01

    In Centrifugal Pipe Casting machine, hot molten metal is injected from one end and the other end remains closed by a covering plate having standard dimension. This covering plate is locked by a worker with the help of a spanner. This covering plate again needs to be opened after completion of casting process for the extraction of the pipe from the mould. This paper discuss mainly focused on the analysis of locking plate and its new design so that the humaninterference must be reduced to highe...

  11. Application of Shape Lock-on Method in Plate Rolling

    Institute of Scientific and Technical Information of China (English)

    HU Xian-lei; WANG Jun; WANG Zhao-dong; LIU Xiang-hua; WANG Guo-dong

    2004-01-01

    AGC system can improve the plate gauge precision, and damage the plate shape if the shape control loop is left quite open. This damage will cause wave during rolling wide-thin plate. A control strategy named shape lock-on method is afforded for plate shape control. This method requires APC instead of AGC at last one or two passes during rolling wide-thin plate. Approved by theory and on-line application, this method is good for the plate shape and crown control with small effect on gauge control.

  12. Notch sensitivity jeopardizes titanium locking plate fatigue strength.

    Science.gov (United States)

    Tseng, Wo-Jan; Chao, Ching-Kong; Wang, Chun-Chin; Lin, Jinn

    2016-12-01

    Notch sensitivity may compromise titanium-alloy plate fatigue strength. However, no studies providing head-to-head comparisons of stainless-steel or titanium-alloy locking plates exist. Custom-designed identically structured locking plates were made from stainless steel (F138 and F1314) or titanium alloy. Three screw-hole designs were compared: threaded screw-holes with angle edges (type I); threaded screw-holes with chamfered edges (type II); and non-threaded screw-holes with chamfered edges (type III). The plates' bending stiffness, bending strength, and fatigue life, were investigated. The stress concentration at the screw threads was assessed using finite element analyses (FEA). The titanium plates had higher bending strength than the F1314 and F138 plates (2.95:1.56:1) in static loading tests. For all metals, the type-III plate fatigue life was highest, followed by type-II and type-I. The type-III titanium plates had longer fatigue lives than their F138 counterparts, but the type-I and type-II titanium plates had significantly shorter fatigue lives. All F1314 plate types had longer fatigue lives than the type-III titanium plates. The FEA showed minimal stress difference (0.4%) between types II and III, but the stress for types II and III was lower (11.9% and 12.4%) than that for type I. The screw threads did not cause stress concentration in the locking plates in FEA, but may have jeopardized the fatigue strength, especially in the notch-sensitive titanium plates. Improvement to the locking plate design is necessary. Copyright © 2016 Elsevier Ltd. All rights reserved.

  13. A failure study of a locking compression plate implant

    Directory of Open Access Journals (Sweden)

    Nirajan Thapa

    2015-04-01

    Full Text Available In this case study a failed locking compression plate was investigated. Such plating systems are used to provide the stability to fractured bone and fixation. The locking compression plate had been separated in two pieces. One of the fracture surfaces from the failed component was investigated for surface topographical features. The visual, optical and scanning electron microscopy results indicated the presence of beach marks, intermetallic inclusions, corrosion pits and striations indicating fatigue crack propagation and overload failure. Some corrosion damage also was documented on the fractography. This case study shows that corrosion may have initiated fatigue crack which grew by the activities of daily living causing the failure.

  14. Influence of plate-bone contact on cyclically loaded conically coupled locking plate failure.

    Science.gov (United States)

    Rotne, Randi; Bertollo, Nicky; Walsh, William; Dhand, Navneet K; Voss, Katja; Johnson, Kenneth A

    2014-03-01

    The maintenance of friction between locking plates and bone is not essential, so that they can be applied with a gap between the plate and underlying bone. We hypothesised that the presence of a gap under a locking plate with a conical coupling mechanism would reduce fixation stability or allow uncoupling of the locking screws from the plate. Locking plates with two conically coupled locking screws were applied to 6 pairs of adult canine femora. One of each pair had plate to bone contact and the contralateral construct had a 2 mm plate to bone gap. Constructs were cyclically loaded in cantilever bending with 10 percent incremental increases every 1000 cycles at 2 Hz, starting at 250 N. The constructs were fatigued to failure. To evaluate fatigue life of the conical coupling, testing was repeated with aluminium tubing replacing the bone, to eliminate screw-bone cutout failure. The mean sustained loads and cycles to failure in the contact group (420.80, standard error [SE] 14.97 N; 7612.00, SE 574.70 cycles) were significantly greater than in the gap group (337.50, SE 14.97 N; 4252.00, SE 574.70 cycles), (pplate fatigue and breaking, with one construct having elevation of the plate over the screw head. Elevation of locking plates with a conical coupling system by 2 mm from the bone reduced construct fatigue life but did not result in screw head uncoupling from the plate. Copyright © 2013 Elsevier Ltd. All rights reserved.

  15. Congruency of scapula locking plates: implications for implant design.

    Science.gov (United States)

    Park, Andrew Y; DiStefano, James G; Nguyen, Thuc-Quyen; Buckley, Jenni M; Montgomery, William H; Grimsrud, Chris D

    2012-04-01

    We conducted a study to evaluate the congruency of fit of current scapular plate designs. Three-dimensional image-processing and -analysis software, and computed tomography scans of 12 cadaveric scapulae were used to generate 3 measurements: mean distance from plate to bone, maximum distance, and percentage of plate surface within 2 mm of bone. These measurements were used to quantify congruency. The scapular spine plate had the most congruent fit in all 3 measured variables. The lateral border and glenoid plates performed statistically as well as the scapular spine plate in at least 1 of the measured variables. The medial border plate had the least optimal measurements in all 3 variables. With locking-plate technology used in a wide variety of anatomical locations, the locking scapula plate system can allow for a fixed-angle construct in this region. Our study results showed that the scapular spine, glenoid, and lateral border plates are adequate in terms of congruency. However, design improvements may be necessary for the medial border plate. In addition, we describe a novel method for quantifying hardware congruency, a method that can be applied to any anatomical location.

  16. The mechanical benefit of medial support screws in locking plating of proximal humerus fractures.

    Directory of Open Access Journals (Sweden)

    Wen Zhang

    Full Text Available BACKGROUND: The purpose of this study was to evaluate the biomechanical advantages of medial support screws (MSSs in the locking proximal humeral plate for treating proximal humerus fractures. METHODS: Thirty synthetic left humeri were randomly divided into 3 subgroups to establish two-part surgical neck fracture models of proximal humerus. All fractures were fixed with a locking proximal humerus plate. Group A was fixed with medial cortical support and no MSSs; Group B was fixed with 3 MSSs but without medial cortical support; Group C was fixed with neither medial cortical support nor MSSs. Axial compression, torsional stiffness, shear stiffness, and failure tests were performed. RESULTS: Constructs with medial support from cortical bone showed statistically higher axial and shear stiffness than other subgroups examined (P<0.0001. When the proximal humerus was not supported by medial cortical bone, locking plating with medial support screws exhibited higher axial and torsional stiffness than locking plating without medial support screws (P ≤ 0.0207. Specimens with medial cortical bone failed primarily by fracture of the humeral shaft or humeral head. Specimens without medial cortical bone support failed primarily by significant plate bending at the fracture site followed by humeral head collapse or humeral head fracture. CONCLUSIONS: Anatomic reduction with medial cortical support was the stiffest construct after a simulated two-part fracture. Significant biomechanical benefits of MSSs in locking plating of proximal humerus fractures were identified. The reconstruction of the medial column support for proximal humerus fractures helps to enhance mechanical stability of the humeral head and prevent implant failure.

  17. Outcome Analysis of Locking Plate Fixation in Proximal Humerus Fracture

    Science.gov (United States)

    Pathak, Abhishek; Gaur, Sanjiv

    2016-01-01

    Introduction Proximal humerus fractures account for approximately 5% of all fractures. Stable minimally displaced fractures can be treated nonoperatively but the management of displaced fractures remain controversial with various modalities of treatment available. Locking plates provide stable fixation and enable early postoperative mobilization specially in osteoporotic proximal humerus fracture. Aim To evaluate the functional outcome of locking plate fixation and to compare the results of two approaches used for fixation. Materials and Methods This prospective study was conducted at a tertiary level hospital between September 2011 to December 2013. PHILOS plates were used for internal fixation of displaced proximal humerus fractures Neer’s type 2 part, 3 part and 4 part fractures on 26 patients (M/F ratio 1.36:1; mean age 46 years). According to Neer classification, 5,12 and 9 patients had displaced 2, 3 and 4 part fractures respectively. Deltopectoral and deltoid splitting approaches were used for fixation on 13 patients each. Functional outcome was assessed using Constant-Murley shoulder score. Graphpad software version 6.0 was used with Chi-square test and Fisher-exact test are used to compare data. The p-value .05) and all fractures were united. Conclusion Our study demonstrates that locking plate fixation gives good functional outcomes in treatment of proximal humerus fractures. There was no significant difference in the two approaches used for exposure. Our results are comparable to various studies conducted by other authors which states that locking plates provide better functional and radiological outcomes as compared to other fixation methods like Tension band wiring, percutaneous K-wire fixation, non-locking plates, intramedullary nails. PMID:27656515

  18. Are there any differences in various polyaxial locking systems? A mechanical study of different locking screws in multidirectional angular stable distal radius plates.

    Science.gov (United States)

    Mehling, Isabella; Scheifl, Rebekka; Mehler, Dorothea; Klitscher, Daniela; Hely, Hans; Rommens, Pol M

    2013-04-01

    Numerous angular stable plates for the distal radius exist, and technically based comparisons of the polyaxial locking interfaces are lacking. The aim of this mechanical study was to investigate three different locking interfaces of angular stable volar plates by cantilever bending: VA-LCP Two-Column Distal Radius Plates 2.4 mm (Synthes® GmbH, Oberdorf, Switzerland), IXOS® P4 (Martin, Tuttlingen, Germany) and VariAX™ (Stryker®, Duisburg, Germany). We assessed the strength of 0°, 5°, 10° and 15° screw locking angles and tested the bending strength from 10° to 5° angles by cyclic loading until breakage. The final setup repeated the above assessments by inclusion of four locking screws. The single screw-plate interfaces of the VA-LCP showed the highest bending moment at an angle of 0° and 5°, the IXOS® P4 at an angle of 10° and 15° and the VariAX™ when changing the insertion angle from 10° into 5°. The strength of polyaxial locking interfaces and mechanism of failure proved to be different among the examined plates.

  19. Displaced proximal humeral fractures: an Indian experience with locking plates

    Directory of Open Access Journals (Sweden)

    Aggarwal Sameer

    2010-08-01

    Full Text Available Abstract Background The treatment of displaced proximal humerus fractures, especially in elderly, remains controversial. The objective of this study was to evaluate functional outcome of locking plate used for fixation of these fractures after open reduction. We also attempted to evaluate the complications and predictors of loss of fixation for such an implant. Methods Over two and a half years, 56 patients with an acute proximal humerus fracture were managed with locking plate osteosynthesis. 47 of these patients who completed a minimum follow up of 1 year were evaluated using Constant score calculation. Statistical analysis was done using SPSS 16 and a p value of less than 0.05 was taken as statistically significant. Results The average follow up period was around 21.5 months. Outcomes were excellent in 17%, good in 38.5%, moderate in 34% while poor in 10.5%. The Constant score was poorer for AO-OTA type 3 fractures as compared to other types. The scores were also inferior for older patients (> 65 years old. Complications included screw perforation of head, AVN, subacromial impingement, loss of fixation, axillary nerve palsy and infection. A varus malalignment was found to be a strong predictor of loss of fixation. Conclusion Locking plate osteosynthesis leads to satisfactory functional outcomes in all the patients. Results are better than non locking plates in osteoporotic fractures of the elderly. However the surgery has steep learning curve and various complications could be associated with its use. Nevertheless we believe that a strict adherence to the principles of locking plate use can ensure good result in such challenging fractures.

  20. OUTCOME OF LOCKING PLATES IN DISTAL TIBIA FRACTURES TREATMENT

    Directory of Open Access Journals (Sweden)

    Lokesh

    2016-05-01

    Full Text Available INTRODUCTION Most of these fractures except intra-articular fractures are treated with interlocking nail. 1,2 These nails are a boon for these fractures. But as the fracture nears to the joint stability the fracture fixation will be compromised due to malreduction and alignment, it leads to increased chances of delayed and nonunion. 3 Locking anatomical plates are evaluated for anatomical and relative stability fixation. Since then most intra and near intra-articular fractures are fixed with these plates with minimally invasive percutaneous plate osteosynthesis method, these plates have given excellent result 4 . But again these plates have some disadvantages 5 . This study is done to see the outcome of locking plates in distal tibia fracture. METHODS This study is done in the Department of Orthopaedics, Bangalore Medical College, Bangalore. This study is done from 2013 to 2015. 30 patients who came to outpatient department were treated with locking plates. All patients above 16 years having distal third tibia fracture are included. All open fractures except type 1 and elderly above 60 years and pathological fractures are excluded in our study. All patients were followed up for initial 5 months, thereafter, once in 3 months, for clinical and radiological evaluation of union status, knee range of motion, ankle range of motion and other complications. Assessment of the patient with functional recovery was done with American Orthopaedic Foot and Ankle Surgery(AOFAS 6 minimum 5 months after injury. RESULTS Majority of the patients are from age group 18-29 years (50%. Average age group was 30 years. Majority of the patients were males 80.6% (25. All fractures were closed fractures except 2 cases which are type 1. There were 12 cases of AO type A, 8 patients were AO type B and 10 patients were type C. Majority of the patients had fracture due to road traffic accidents, 74%. All fractures were united by the end of 20 weeks. There was delayed union in

  1. Increased rates of wound complications with locking plates in distal fibular fractures

    NARCIS (Netherlands)

    T. Schepers (Tim); E.M.M. van Lieshout (Esther); M.R.D. Vries; M. van der Elst (Maarten)

    2011-01-01

    textabstractIntroduction: There is a growing use of locking compression plates in fracture surgery. The current study was undertaken to investigate the wound complication rates of locking versus non-locking plates in distal fibular fractures. Patients and methods: During a 6-year study period all co

  2. Locking plates in distal humerus fractures: study of 43 patients

    Directory of Open Access Journals (Sweden)

    Gupta Rakesh Kumar

    2013-08-01

    Full Text Available 【Abstract】Objective: The treatment of multi-fragmentary, intraarticular fractures of the distal humerus is difficult, even in young patients with bone of good quality. Small distal fragment, diminished bone mineral quality and increased trauma-associated joint destruction make stable joint reconstruction more problematic. The anatomically preshaped locking plates allow angular stable fixation for these complex fractures. We evaluated functional results of patients treated with open reduction and internal fixation with distal humerus locking plates for complex distal hu-merus fractures. Methods: Forty-three consecutive patients with ar-ticular fractures of the distal humerus were treated by open reduction and internal fixation with AO distal humerus plate system and locking reconstruction plates. Forty patients were available for the final outcome analysis. According to AO/ASIF classification, there were 2 cases of type A2, 4 cases of type A3, 1 case of type B1, 1 case of type B2, 14 cases of type C1, 7 cases of type C2 and 11 cases of type C3. Open reduction with triceps splitting technique was used in all patients. The clinical and radiographic follow-up was performed and outcome measures included pain assessment, range of motion, and Mayo elbow performance score. Results: Forty patients were available for the final outcome analysis. There were 29 males and 11 females with an average age of 38.4 years (18-73 years. Clinical and ra-diological consolidation of the fracture was observed in all cases at an average of 11.6 weeks (9-14 weeks. The average follow-up was 12 months (10-18 months. Using the Mayo elbow performance score the results obtained were graded as excellent or good results in 33 patients (82.5%. One pa-tient had superficial infection, and 4 had myositis ossificans. There were no cases of primary malposition or secondary displacement, implant failure or ulnar neuropathy. Conclusion: Anatomically preshaped distal humerus locking

  3. Unstable Distal Radius Fractures Treated by Volar Locking Anatomical Plates

    Science.gov (United States)

    Jose, Anto; Deniese, Pascal Noel; Babu, Abey Thomas; Rengasamy, Kanagasabai; Najimudeen, Syed

    2017-01-01

    Introduction Fracture of the distal end of radius represents the most common fracture of the upper extremity accounting for 16-20% of all fractures. Plating is now emerging as the gold standard for management of distal radius fractures due to increased rate of complications such as malunion, subluxation/dislocation of distal radio-ulnar joint or late collapse of fracture. Procedures such as closed reduction and cast immobilization, ligamentotaxis with external fixator and percutaneous pin fixation are no longer acceptable. Aim The purpose of the study was to evaluate the functional and radiological outcome of unstable distal radius fractures treated with the volar locking plate. Materials and Methods We reviewed 53 patients from January 2011 to December 2015, treated for unstable distal radius fractures using a volar locking compression plate. Standard radiographic and clinical assessment after 12 months (range 12-16 months) were measured and final functional and radiological outcome were assessed using the Modified Mayo wrist scoring system and Sarmiento’s modification of Lindstorm criteria respectively. Results There were 42 males and 11 females with an average age of 39.12±31.78 years (18-71 years). At the end of 12 months, 36 patients had an excellent radiological outcome and 10 patients had good radiological outcome as per Sarmiento’s modification of Lindstorm criteria. Eleven patients had an excellent functional outcome and 26 patients had a good functional outcome as per modified Mayo wrist scoring system. There was one case of superficial wound infection which subsided with intravenous antibiotics. Conclusion The volar locking plate fixation helps in early mobilization of the wrist, restores anatomy, allows early return to function, prevents secondary loss of reduction and hence is an effective treatment for unstable fractures of the distal radius. PMID:28274009

  4. Locking plates in distal humerus fractures: study of 43 patients

    Institute of Scientific and Technical Information of China (English)

    Rakesh Kumar Gupta; Vinay Gupta; Dickey Richard Marak

    2013-01-01

    Objective:The treatment of multifragmentary,intraarticular fractures of the distal humerus is difficult,even in young patients with bone of good quality.Small distal fragment,diminished bone mineral quality and increased trauma-associated joint destruction make stable joint reconstruction more problematic.The anatomically preshaped locking plates allow angular stable fixation for these complex fractures.We evaluated functional results of patients treated with open reduction and internal fixation with distal humerus locking plates for complex distal humerns fractures.Methods:Forty-three consecutive patients with articular fractures of the distal humerus were treated by open reduction and internal fixation with AO distal humerus plate system and locking reconstruction plates.Forty patients were available for the final outcome analysis.According to AO/ASIF classification,there were 2 cases of type A2,4 cases of type A3,1 case of type B1,1 case of type B2,14 cases of type C1,7 cases of type C2 and 11 cases of type C3.Open reduction with triceps splitting technique was used in all patients.The clinical and radiographic follow-up was performed and outcome measures included pain assessment,range of motion,and Mayo elbow performance score.Results:Forty patients were available for the final outcome analysis.There were 29 males and 11 females with an average age of 38.4 years (18-73 years).Clinical and radiological consolidation of the fracture was observed in all cases at an average of 11.6 weeks (9-14 weeks).The average follow-up was 12 months (10-18 months).Using the Mayo elbow performance score the results obtained were graded as excellent or good results in 33 patients (82.5%).One patient had superficial infection,and 4 had myositis ossificans.There were no cases of primary malposition or secondary displacement,implant failure or ulnar neuropathy.Conclusion:Anatomically preshaped distal humerus locking plate system is useful in providing stable fixation for complex

  5. A review of locking compression plate biomechanics and their advantages as internal fixators in fracture healing.

    Science.gov (United States)

    Miller, Danielle L; Goswami, Tarun

    2007-12-01

    Metallic implants are often involved in the open reduction and internal fixation of fractures. Open reduction and internal fixation is commonly used in cases of trauma when the bone cannot be healed using external methods such as casting. The locking compression plate combines the conventional screw hole, which uses non-locking screws, with a locking screw hole, which uses locking head screws. This allows for more versatility in the application of the plate. There are many factors which affect the functionality of the plate (e.g., screw placement, screw choice, length of plate, distance from bone, etc.). This paper presents a review of the literature related to the biomechanics of locking compression plates and their use as internal fixators in fracture healing. Furthermore, this paper also addresses the materials used for locking compression plates and their mechanical behavior, parameters that control the overall success, as well as inherent bone quality results.

  6. Complications of the locking plate for displaced proximal humeral fractures

    Institute of Scientific and Technical Information of China (English)

    LU Yi; WANG Man-yi; ZHU Yi-ming; JIANG Chun-yan

    2010-01-01

    Background Although the locking plate has become popular for treating displaced proximal humeral fractures in recent years, the complications of this method are still underestimated. We tried to evaluate the factors that have an influence on the complications experienced after proximal humeral fractures fixed by locking plates and compare the results from patients having complications with those having no complications.Methods From September 2004 to September 2007, 92 out of 111 displaced proximal humeral fractures treated by open reduction and internal fixation with a locking plate were available for follow-up, with an average time of 15.2months (12-36 months). The range of motion, Visual Analog Score (VAS) for pain, American Shoulder and Elbow Surgeons' Form (ASES), Constant-Murley, University of California-Los Angles scoring system (UCLA) score, and Simple Shoulder Test (SST) for function evaluation was all recorded at the latest follow-up. The results from patients with complications were evaluated according to the indices listed above and compared with those patients without any complications.Results There were 17 patients with complications, an 18.5% complication rate. Among them, the forward flexion,external rotation and internal rotation were 139.1°±24.3°, 24.1°±19.6°, and up to T10 level on average. The mean VAS score was 1.0±1.1, the ASES score was 82.9±13.8, the Constant 82.1±11.8, the UCLA 28.5±4.1 and the mean SST 9.5on average. There was no significant difference of complication rate among different age, sex, and injured side, fresh or delayed fracture, combined with other injury or not groups. Compared with the group without complications, patients with complications showed significantly less external rotation and lower Constant-Murley and UCLA functional scores (P <0.05). A significant difference in results was seen between patients with complications and those without complications.Conclusion The indication control and appropriate

  7. Adult periarticular locking plates for the treatment of pediatric and adolescent subtrochanteric hip fractures.

    Science.gov (United States)

    Sanders, Samuel; Egol, Kenneth A

    2009-01-01

    Two cases are presented in which adult, precontoured, lower-extremity periarticular locking plates were utilized for fixation of subtrochanteric femur fractures in pediatric patients. Recognition of the fact that a distal tibial locking plate in a small child and a proximal tibial locking plate in an adolescent anatomically ft the proximal femur in each case may provide a surgeon treating subtrochanteric hip fractures in this population increased options for operative stabilization.

  8. The clinical benefits of reconstructing the medial column support in locked plating of proximal humerus fractures%内侧柱支撑重建在锁定钢板治疗成人肱骨近端骨折中的临床意义

    Institute of Scientific and Technical Information of China (English)

    曾浪清; 陈云丰; 刘燕洁; 陈强; 王赤宇; 王磊; 张闻

    2012-01-01

    目的 探讨锁定钢板固定肱骨近端骨折术中肱骨近端内侧柱支撑重建的临床意义.方法 回顾性分析2005年6月至2010年12月采用锁定钢板治疗且获得随访的125例肱骨近端骨折患者临床资料,男54例,女71例;年龄18~88岁,平均54.6岁.骨折根据Neer分型:二部分骨折57例,三部分骨折62例,四部分骨折6例.根据术后X线片所示肱骨近端内侧柱支撑重建情况分为2组:内侧柱支撑重建组(重建组,84例)和内侧柱支撑未重建组(未重建组,41例).随访记录并比较两组患者的肩关节功能Constant评分、肱骨头内翻角度、视觉模拟评分(VAS)及并发症发生情况.结果 所有患者术后获6~30个月(平均13.6个月)随访.重建组与未重建组平均Constant评分分别为(77.9±13.0)、(67.3±11.3)分,优良率分别为72.6%、43.9%,平均VAS评分分别为(1.6±2.0)、(3.2±2.4)分,以上项目两组比较差异均有统计学意义(P<0.05);重建组术后肱骨头内翻角度(1.2°±3.3°)小于未重建组(4.4°±4.0°),术后并发症发生率(16.6%)、二次手术率(4.8%)均较未重建组(34.1%、17.0%)低,差异均有统计学意义(P<0.05).结论 锁定钢板固定肱骨近端骨折术中重建肱骨近端内侧柱支撑、骨折端良好复位不仅能使肱骨头得到有效的支撑、预防术后肱骨头内翻及内固定失败,而且术后能取得更满意的疗效.%Objective To evaluate the clinical benefits of reconstructing the medial column support in locked plating of proximal humerus fractures.Methods A retrospective analysis was conducted of the eligible 125 patients who had undergone locked plating of proximal humerus fracture in our institution between June 2005 and December 2010.They were 54 men and 71 women,18 to 88 years of age (average,54.6 years).By the Neer classification,there were 57 cases of two-part fracture,62 cases of three-part fracture and 6 cases of four-part fracture.One independent examiner

  9. A unified theory of plastic buckling of columns and plates

    Science.gov (United States)

    Stowell, Elbridge Z

    1948-01-01

    On the basis of modern plasticity considerations, a unified theory of plastic buckling applicable to both columns and plates has been developed. For uniform compression, the theory shows that long columns which bend without appreciable twisting require the tangent modulus and that long flanges which twist without appreciable bending require the secant modulus. Structures that both bend and twist when they buckle require a modulus which is a combination of the secant modulus and the tangent modulus. (author)

  10. COMPARATIVE STUDY OF FOREARM FRACTURES TREATED WITH LOCKING COMPRESSION PLATE LIMITED CONTACT DYNAMIC COMPRESSION PLATE

    Directory of Open Access Journals (Sweden)

    Jayachandra Reddy

    2015-02-01

    Full Text Available OBJECTIVES: This study has been carried out to compare the functional outcome of fracture fixation in diaphyseal forearm fractures by using Locking Compression Plate versus Limited contact dynamic compression Plate. To study the difference in the duration of union & complications with LCP & LC - DCP. METHODOLOGY: It is a prospective randomised comparative study which was carried out from December 2012 to December 2014 in our In stitution. In Group I, 20 patients were subjected to open reduction and internal fixation with 3.5 mm stainless steel LCP and locking head/nonlocking screws. In Group II, 20 patients were managed by 3.5mm LCDCP and non - locking screws. Clinical assessments regarding pain and function, radiological assessments were undertaken at the final follow - up. RESULTS - The time required for LCP fixation (mean 93.5 min, range 75 - 120 min was found to be more than that required for LC - DCP (mean 81.94 min, range 60 - 110 mi n. But this time difference was not significant (P=0.07, unpaired t test. The mean time of union for the forearm fixed with LCP was found to be 18 weeks (range 14 - 26 weeks in comparison to 16 weeks (range 10 - 22 weeks for the LC - DCP group. CONCLUSION - LC plating is an effective treatment option for fractures shaft of forearm. The present study could not prove the superiority of LCP over LC - DCP. It is the proper application of the principles of plating and not the type of plate which decides the outco me. Further long - term multicentric study is required to prove behaviors of the implant.

  11. Comparative clinical study of locking screws versus smooth locking pegs in volar plating of distal radius fractures.

    Science.gov (United States)

    Boretto, J G; Pacher, N; Giunta, D; Gallucci, G L; Alfie, V; De Carli, P

    2014-09-01

    The present study was performed to test the null hypothesis on no difference in stability of fixation after volar plating of intra-articular distal radius fractures (AO C2-C3) with either locking smooth pegs or locking screws in a clinical setting. A retrospective evaluation included adult patients with C2-C3 AO fractures treated with a volar plate with locking smooth pegs or locking screws. Radiographic assessment was performed to evaluate extra- and intra-articular parameters in the early postoperative period and after bone union. Twenty-seven consecutive patients were included. Thirteen cases had fixation with locking screws and 14 had fixation with locking smooth pegs. Both groups had bone fragment displacement after fixation. However, there were no significant differences between the groups either in extra- or intra-articular parameters defined by Kreder et al. (1996). Our study shows that, in a clinical setting, there is no difference in stability fixation between locking screws or smooth locking pegs in C2-C3 distal radius fractures.

  12. Complications during removal of conventional versus locked compression plates: is there a difference?

    Science.gov (United States)

    Neumann, Hanjo; Stadler, Anne; Heuer, Hinrich; Auerswald, Marc; Gille, Justus; Schulz, Arndt Peter; Kienast, Benjamin

    2017-08-01

    Osteosynthesis plate removal is one of the most commonly performed procedures in orthopaedic surgery. Due to technological advances and the quality of increasing osteosynthesis material, more and more locked plates have been implanted over the last 20 years. The aim of this study was to determine whether the complication rate during plate removal differs between conventional and locked plates. In this retrospective cohort study, 620 patients were included and divided into two groups based on the type of plate (locked and conventional). Technical complications during implant removal included screw breakage, destroyed screw head, implant breakage, remaining implant material, refracture, bony or soft tissue overgrowth. The following plate-associated complications were identified: osteosynthesis plate not detachable, plate bent or broken, necessity of special tools or plate loosened. Three types of screw-related complications were observed: screw not detachable, screw broken or screw dislocated. Overall, complications related to the plate or screws were documented in 110 of the 620 cases. These complications occurred in 48 of the 382 cases involving conventional osteosynthesis (7.7% of all removals, 12.6% of all conventional removals) and in 62 of the 238 cases involving locked plate osteosynthesis (10.0% of all removals, 26.1% of all locked plate removals). The statistical analysis showed a significantly higher implant-related complication rate with locked plates compared to the conventional plates (p < 0.01). Hardware removal can be a complication-afflicted operation, especially cases involving locked-plate removal should only be performed if a strong indication is evident. Possible benefits of the procedure should be considered carefully, taking the cost-benefit ratio into account.

  13. Failure of volar locking plate fixation of an extraarticular distal radius fracture: A case report

    Directory of Open Access Journals (Sweden)

    Ozer Kagan

    2010-11-01

    Full Text Available Abstract Background Volar locking plates provide significant structural stability to the distal radius. Failure of a volar locked plating is a rarely reported complication in the literature. Case Presentation A 40 year-old, obese female patient who presented with a displaced extraarticular distal radius fracture, underwent open reduction and internal fixation of the fracture using a volar locking plate. Radiographs taken at 10 weeks postoperatively showed failure of fixation with breakage of the four distal locking screws. A hardware removal was performed at 6 months, and the patient was then lost to follow-up. She presented again at 18 months after the first surgery, with significant pain, and radiographic signs of a radial collapse and a fracture-nonunion. A total wrist fusion was performed as the method of choice at that point in time. Conclusion Volar locked plating represents the new "gold standard" of distal radius fracture fixation. However, despite the stability provided by locking plates, hardware failure may occur and lead to a cascade of complications which will ultimately require a wrist fusion, as outlined in this case report. Additional structural support by bone grafting may be needed in selected cases of volar locked plating, particularly in patients with a high risk of developing a fracture-nonunion.

  14. The relationship between interfragmentary movement and cell differentiation in early fracture healing under locking plate fixation.

    Science.gov (United States)

    Miramini, Saeed; Zhang, Lihai; Richardson, Martin; Mendis, Priyan; Oloyede, Adekunle; Ebeling, Peter

    2016-03-01

    Interfragmentary movement (IFM) at the fracture site plays an important role in fracture healing, particularly during its early stage, via influencing the mechanical microenvironment of mesenchymal stem cells within the fracture callus. However, the effect of changes in IFM resulting from the changes in the configuration of locking plate fixation on cell differentiation has not yet been fully understood. In this study, mechanical experiments on surrogate tibia specimens, manufactured from specially formulated polyurethane, were conducted to investigate changes in IFM of fractures under various locking plate fixation configurations and loading magnitudes. The effect of the observed IFM on callus cell differentiation was then further studied using computational simulation. We found that during the early stage, cell differentiation in the fracture callus is highly influenced by fracture gap size and IFM, which in turn, is highly sensitive to locking plate fixation configuration. The computational model predicted that a small gap size (e.g. 1 mm) under a relatively flexible configuration of locking plate fixation (larger bone-plate distances and working lengths) could experience excessive strain and fluid flow within the fracture site, resulting in excessive fibrous tissue differentiation and delayed healing. By contrast, a relatively flexible configuration of locking plate fixation was predicted to improve cartilaginous callus formation and bone healing for a relatively larger gap size (e.g. 3 mm). If further confirmed by animal and human studies, the research outcome of this paper may have implications for orthopaedic surgeons in optimising the application of locking plate fixations for fractures in clinical practice.

  15. Use of locking plates for fixation of the greater trochanter in patients with hip replacement

    Directory of Open Access Journals (Sweden)

    Allison K. Tetreault, BA

    2016-12-01

    Conclusions: Locking plate technology is a successful method of fixation of the greater trochanter in patients with THA. Postoperative trochanteric pain and reoperation for hardware-related issues remain a challenge.

  16. Locking plate osteosynthesis in displaced 4-part fractures of the proximal humerus

    DEFF Research Database (Denmark)

    Brorson, Stig; Frich, Lars H; Winther, Annika;

    2011-01-01

    There is considerable uncertainty about the optimal treatment of displaced 4-part fractures of the proximal humerus. Within the last decade, locking plate technology has been considered a breakthrough in the treatment of these complex injuries....

  17. Reducing Postoperative Fracture Displacement After Locked Plating of Proximal Humerus Fractures: Current Concepts.

    Science.gov (United States)

    Newman, Jared; Kahn, Mani; Gruson, Konrad I

    2015-07-01

    The incidence of proximal humerus fractures in the elderly has been rising. Concomitantly, operative fixation with use of locking plates has been increasing. Postoperative complications of locking plate fixation, particularly in the setting of osteoporotic bone, include screw penetration of the articular surface, progressive fracture displacement, and avascular necrosis. Intraoperative techniques to enhance the fixation construct and reduce complications include use of rotator cuff sutures, bone void fillers (fibular strut allograft, cancellous allograft, autograft, bone cement), appropriate placement of divergent and shorter locking screws, and medial calcar reduction and support. More recent clinical and biomechanical studies suggest that use of these strategies may reduce complications after locked plating of osteoporotic proximal humerus fractures. Furthermore, a multidisciplinary approach to the evaluation and treatment of osteoporosis may be beneficial in these patients.

  18. Mechanical Comparison of Headless Screw Fixation and Locking Plate Fixation for Talar Neck Fractures.

    Science.gov (United States)

    Karakasli, Ahmet; Hapa, Onur; Erduran, Mehmet; Dincer, Cemal; Cecen, Berivan; Havitcioglu, Hasan

    2015-01-01

    For talar neck fractures, open reduction and internal fixation have been thought to facilitate revascularization and prevent osteonecrosis. Newer screw systems allow for placement of cannulated headless screws, which provide compression by virtue of a variable pitch thread. The present study compared the biomechanical fixation strength of cannulated headless variable-pitch screw fixation and locking plate fixation. A reproducible talar neck fracture was created in 14 fresh cadaver talar necks. Talar head fixation was then performed using 2 cannulated headless variable-pitch 4-mm/5-mm diameter (4/5) screws (Acutrak; Acumed, Hillsboro, OR) and locking plate fixation. Headless variable-pitch screw fixation had lower failure displacement than did locking plate fixation. No statistically significant differences were found in failure stiffness, yield stiffness (p = .655), yield load (p = .142), or ultimate load between the 2 fixation techniques. Cannulated headless variable-pitch screw fixation resulted in better failure displacement than locking plate fixation in a cadaveric talus model and could be considered a viable option for talus fracture fixation. Headless, fully threaded, variable-pitch screw fixation has inherent advantages compared with locking plate fixation, because it might cause less damage to the articular surface and can compress the fracture for improved reduction. Additionally, plate fixation can increase the risk of avascular necrosis owing to the wider incision and dissection of soft tissues.

  19. Periprosthetic Vancouver type B1 and C fractures treated by locking-plate osteosynthesis

    DEFF Research Database (Denmark)

    Froberg, Lonnie; Troelsen, Anders; Brix, Michael

    2012-01-01

    internal fixation, and the introduction of locking-plate osteosynthesis may lead to improved outcome. We evaluated the outcome of Vancouver type B1 and C PFFs treated by locking-plate osteosynthesis, by assessing rates of fracture union and reoperations and by analyzing failure cases.......Historically, the treatment of periprosthetic femoral fractures (PFFs) has been associated with a high frequency of complications and reoperations. The preferred treatment is internal fixation, a revision of the femoral stem, or a combination of both. An improved understanding of plate use during...

  20. The Minimally Invasive Plate Osteosynthesis (MIPO Technique with a Locking Compression Plate for Femoral Lengthening

    Directory of Open Access Journals (Sweden)

    Tetsunaga,Tomonori

    2008-10-01

    Full Text Available A minimally invasive plate osteosynthesis technique using a locking compression plate (LCP has been used widely in trauma cases. Its advantages are that the MIPO technique does not interfere with the fracture site and thus provides improved biological healing, and that the LCP has excellent angular stability. Its use in bone lengthening, however, has not been established. In such cases, it is desirable to shorten the external skeletal fixation period as much as possible. Here, the MIPO technique using an LCP was applied to femoral distraction osteogenesis in an attempt to shorten the external skeletal fixation period. For femoral lengthening, the MIPO technique was performed in 2 stages. Orthofix external fixators (Orthofix, England were used to insert screws from the anterolateral side rather than from the lateral side of the femur for bone lengthening. When sufficient callus formation was detected postoperatively at the site of bone lengthening, and the absence of infection was ensured, limb draping was performed, including a whole external fixator, and then the MIPO technique was applied with an LCP. In 3 cases (5 limbs, the average duration of external skeletal fixation was 134days, the average external-fixation index was 24days/cm, and the average consolidation index was 22days/cm. The MIPO technique using an LCP made it possible to shorten the external skeletal fixation-wearing period in femoral lengthening.

  1. CLINICAL OUTCOMES OF LOCKING COMPRESSION PLATE FIXATION THROUGH MINIMALLY INVASIVE PERCUTANEOUS PLATE OSTEOSYNTHESIS IN THE TREATMENT OF DISTAL TIBIAL FRACTURE

    Directory of Open Access Journals (Sweden)

    Venkateswara Rao

    2015-07-01

    Full Text Available BACKGROUND: Distal diametaphyseal tibia fracture though requires operative treatment is difficult to manage. Conventional osteosynthesis is not suitable because distal tibia is subcutaneous bone with poor vascularity. Closed reduction and minimally invasive percutaneous plate osteosynthes is with locking compression plate (LCP has emerged as an alternative treatment option because it respects biology of distal tibia and fracture hematoma and also provides biomechanica l ly stable construct. OBJECTIVES: To find out suitability of minimally invasive percutaneous plate osteosynthesis with Locking compression plate for distal diametaphyseal tibia fracture including union time and complications. METHODS: Twenty patients with closed distal tibia fracture with or without intra articular extension (AO classification type - A1, type - A2, type - A3 treated with minimally invasive percutaneous plate osteosynthesis with Locking compression plate were prospectively followed for average duration of 12 months. RESULTS: Ave rage duration of injury - surgery interval was 4.5 days (Range 3 - 7 days all fractures got united with an average duration of 23.5 weeks (range17 - 30weeks. No non - union or mal - union were found. There was one superficial infection found which healed with exte nded period of intravenous antibiotics.

  2. Complications and functional outcome after fixation of distal tibia fractures with locking plate - A multicentre study

    DEFF Research Database (Denmark)

    Viberg, Bjarke; Kleven, Silje; Hamborg-Petersen, Ellen

    2016-01-01

    and X-ray images for 6 hospitals (1 level 1, 5 level 2) in the Region of Southern Denmark. Between January 2007 and April 2011 70 consecutive patients with 71 distal tibia fractures were treated with low-profile locking plate were included. The proportion of post-operative complications, classified......INTRODUCTION: The aim of this study was to evaluate the proportion of complications and the functional outcome following ORIF with low-profile locking plates in patients with distal tibia fractures. METHOD: Retrospective data was retrieved using county databases, operation books, health record...... score was 73. Thirty-three percent of working patients had not returned to work as a result of the fracture. CONCLUSIONS: Our study suggest that treatment of distal tibia fractures with low-profile locking plates might have a higher proportion of complications and worse functional outcome than...

  3. Mass transfer coeficients in pulsed perforated-plate extraction columns

    Directory of Open Access Journals (Sweden)

    M. Torab-Mostaedi

    2010-06-01

    Full Text Available This study examined the mass transfer performance in a pulsed perforated-plate extraction column with diameter of 50 mm using two different liquid systems. Mass transfer coefficients have been interpreted in terms of the axial diffusion model. The effects of pulsation intensity and dispersed and continuous phase velocities on the mass transfer performance have been investigated. Three different operating regimes, namely mixer-settler, transition, and emulsion regimes, were observed when the input energy was changed. Effective diffusivity is substituted for molecular diffusivity in the Gröber equation for prediction of dispersed phase overall mass transfer coefficients. A single correlation is derived in terms of Reynolds number, Eötvös number and dispersed phase holdup for prediction of the enhancement factor in all operating regimes. The prediction of overall mass transfer coefficients from the presented model is in good agreement with experimental results.

  4. Locking, mass flux and topographic response at convergent plate boundaries - the Chilean case

    Science.gov (United States)

    Oncken, Onno

    2016-04-01

    On the long term, convergent plate boundaries have been shown to be controlled by either accretion/underplating or by subduction erosion. Vertical surface motion is coupled to convergence rate - typically with an uplift rate of the coastal area ranging from 0 to +50% of convergence rate in accretive systems, and -20 to +30% in erosive systems. Vertical kinematics, however, are not necessarily linked to horizontal strain mode, i.e. upper plate shortening or extension, in a simple way. This range of kinematic behaviors - as well as their acceleration where forearcs collide with oceanic ridges/plateau - is well expressed along the Chilean plate margin. Towards the short end of the time scale, deformation appears to exhibit a close correlation with the frictional properties and geodetic locking at the plate interface. Corroborating analogue experiments of strain accumulation during multiple earthquake cycles, forearc deformation and uplift focus above the downdip and updip end of seismic coupling and slip and are each related to a particular stage of the seismic cycle, but with opposite trends for both domains. Similarly, barriers separating locked domains along strike appear to accumulate most upper plate faulting interseismically. Hence, locking patters are reflected in topography. From the long-term memory contained in the forearc topography the relief of the Chilean forearc seems to reflect long term stability of the observed heterogeneity of locking at the plate interface. This has fundamental implications for spatial and temporal distribution of seismic hazard. Finally, the nature of locking at the plate interface controlling the above kinematic behavior appears to be strongly controlled by the degree of fluid overpressuring at the plate interface suggesting that the hydraulic system at the interface takes a key role for the forearc response.

  5. Role of locking plates in treatment of difficult ununited fractures: a clinical study

    Institute of Scientific and Technical Information of China (English)

    Ashok Kumar; Himanshu Gupta; Chandra Shekhar Yadav; Shah Alam Khan; Shishir Rastogi

    2013-01-01

    Objective:To present our experience in treatment of difficult ununited long bone fractures with locking plate.Methods:Retrospective evaluation of locking plate fixation in 10 difficult nonunions of long bone fractures was done.Fixation was done with locking plate for femoral shaft fracture (3 patients),supracondylar fracture of femur (gap nonunion),fracture of clavicle,fracture of both forearm bones (radius and ulna) fracture of ulna,fracture of shaft of humerus,fracture of tibial diaphysis and supracondylar fracture of humerus (one patient each).Five fractures had more than one previous failed internal fixation.One patient had infected nonunion which was managed by debridement with cast immobilization followed by fixation with locking plate at six weeks.Seven fractures were atrophic,two were oligotrophic,and one was hypertrophic.Fibular autograft was used in 2 cases and iliac crest cancellous bone graft used in all the patients.Results:Minimum follow-up was 6 months (range,6 months to 2.5 years).Average rime for union was 3.4 months (range 2.5 to 6 months).None of the patients had platerelated complications or postoperative wound infections.Conclusion:Along with achieving stability with locking compression plate,meticulous soft tissue dissection,acceptable reduction,good fixation technique and bone grafting can help achieve union in difficult nonunion cases.Though locking plate does not by itself ensure bony union,we have found it to be another useful addition to our armamentarium for treating difficult fracture nonunions.

  6. OPERATIVE MANAGEMENT OF INTRA-ARTICULAR DISTAL HUMERAL FRACTURES WITH LOCKING PLATES

    Directory of Open Access Journals (Sweden)

    Abhilekh

    2015-11-01

    Full Text Available BACKGROUND: Intra-articular distal humeral fractures are common, but complex elbow injuries. To obtain good results, anatomical reduction with rigid fixation and early range of mobilization is required. Treatment of these fractures with conventional plates is associated with many complications such as non-anatomic reduction of articular surfaces, malunion, non-union, loosening of implant, residual stiffness of the elbow and post-traumatic osteoarthrosis. In this situation the application of locking plates having a fixed angle plate screw construct can minimise most of the above complications. OBJECTIVE: To evaluate radiological and functional outcome of locking plate application for the management of intra-articular distal humeral fractures. MATERIAL AND METHODS: This prospective study was conducted from January 2013 to December 2014. We operated 20 patients of AO type-C intra-articular distal humeral fractures. Fracture was exposed using modified Campbell’s posterior approach in less comminuted fractures and a V-shaped Olecranon osteotomy was done to get better exposure of the articular surface in cases with severe articular comminution. The fracture was stabilized using an intercondylar screw, pre-contoured locking compression plates and/or locking reconstruction plates as per preoperative planning. Patients were reviewed at monthly interval for clinical-radiological evaluation. Final outcome measures included radiological assessment, range of motion and Mayo elbow performance score (MEPS. RESULTS: All the fractures were united at an average 12 weeks. Two patients developed numbness in the distribution of ulnar nerve and one patient developed superficial infection in immediate postoperative period. None of the patients had malunion and loosening of implant. The average arc of flexion-extension was 105`, although no patient had loss of supination/pronation. Mayo Elbow Performance Score was excellent in 15 (75%, good in 3 (15%, fair in 1 (5

  7. Biomechanical Assessment of Locked Plating for the Fixation of Patella Fractures.

    Science.gov (United States)

    Wurm, Simone; Augat, Peter; Bühren, Volker

    2015-09-01

    To analyze the mechanical stability of locked plating in comparison with tension-band wiring for the fixation of fractures of the patella. Biomechanical tests were performed on artificial foam patella specimens comparing an angular stable plate and monocortical screws with tension-band wiring. Tests were performed under combined tension and bending until failure simulating physiological loading of the tibia during walking. Tension-band wiring failed at 66% of the failure load of plating (1052 N, P = 0.002) and had 5 times larger fracture gap displacements (P = 0.002). Based on the biomechanical advantages, locked plating of the patella may constitute a reasonable alternative in the treatment of patella fractures.

  8. Biomechanical performance of variable and fixed angle locked volar plates for the dorsally comminuted distal radius.

    Science.gov (United States)

    Martineau, D; Shorez, J; Beran, C; Dass, A G; Atkinson, P

    2014-01-01

    The ideal treatment strategy for the dorsally comminuted distal radius fracture continues to evolve. Newer plate designs allow for variable axis screw placement while maintaining the advantages of locked technology. The purpose of this study is to compare the biomechanical properties of one variable axis plate with two traditional locked constructs. Simulated fractures were created via a distal 1 cm dorsal wedge osteotomy in radius bone analogs. The analogs were of low stiffness and rigidity to create a worst-case strength condition for the subject radius plates. This fracture-gap model was fixated using one of three different locked volar distal radius plates: a variable axis plate (Stryker VariAx) or fixed axis (DePuy DVR, Smith & Nephew Peri-Loc) designs. The constructs were then tested at physiologic loading levels in axial compression and bending (dorsal and volar) modes. Construct stiffness was assessed by fracture gap motion during the different loading conditions. As a within-study control, intact bone analogs were similarly tested. All plated constructs were significantly less stiff than the intact control bone models in all loading modes (pbending (pbending.

  9. Computational modelling of long bone fractures fixed with locking plates - How can the risk of implant failure be reduced?

    LENUS (Irish Health Repository)

    Nassiri, M

    2013-03-01

    The Locking Compression Plate (LCP) is part of a new plate generation requiring an adapted surgical technique and new thinking about commonly used concepts of internal fixation using plates. Knowledge of the fixation stability provided by these new plates is very limited and clarification is still necessary to determine how the mechanical stability and the risk of implant failure can best be controlled.

  10. Construction and biomechanical properties of polyaxial self-locking anatomical plate based on the geometry of distal tibia.

    Science.gov (United States)

    Liang, Weiguo; Ye, Weixiong; Ye, Dongping; Zhou, Ziqiang; Chen, Zhiguang; Li, Aiguo; Xie, Zong-Han; Zhang, Lihai; Xu, Jiake

    2014-01-01

    In order to provide scientific and empirical evidence for the clinical application of the polyaxial self-locking anatomical plate, 80 human tibias from healthy adults were scanned by spiral CT and their three-dimensional images were reconstructed using the surface shaded display (SSD) method. Firstly, based on the geometric data of distal tibia, a polyaxial self-locking anatomical plate for distal tibia was designed and constructed. Biomechanical tests were then performed by applying axial loading, 4-point bending, and axial torsion loading on the fracture fixation models of fresh cadaver tibias. Our results showed that variation in twisting angles of lateral tibia surface was found in various segments of the distal tibia. The polyaxial self-locking anatomical plate was constructed based on the geometry of the distal tibia. Compared to the conventional anatomical locking plate, the polyaxial self-locking anatomical plate of the distal tibia provides a better fit to the geometry of the distal tibia of the domestic population, and the insertion angle of locking screws can be regulated up to 30°. Collectively, this study assesses the geometry of the distal tibia and provides variable locking screw trajectory to improve screw-plate stability through the design of a polyaxial self-locking anatomical plate.

  11. Surgical Management of 3 and 4-Part Proximal Humerus Fractures with Locking Plates in Elderly

    Directory of Open Access Journals (Sweden)

    Emrah Kovalak

    2017-05-01

    Full Text Available Aim: Proximal humeral fractures are approximately 5% of all fractures and, %15-20 is displaced and unstable. By the introduction of locking plates there used to be a substantial rise in the osteosynthesis of the 3 and 4-part proximal humeral fractures. But there is still a lack of consensus for the optimal treatment of these complex fractures. In this retrospective study, we aimed to evaluate the functional outcomes and prognostic factors of 3 and 4-part proximal humerus fractures treated with locking plate osteosynthesis in elderly. Material and Method: 53 patients with displaced 3 and 4-part proximal humeral fractures treated with locking plate osteosynthesis between 2010 and 2015 were included. The fractures were classified according to Neer classification system. Outcomes were assessed by Constant-Murley scoring system (CMS, visual analog pain scale and plain radiographs. In reference to range of motion, forward elevation and abduction of the arm were measured.Results: No statistically significant differences found between the 3- part and 4- part fractures in CMS, forward elevation and, abduction (p>0.05. Pain was significantly higher in 4-part fractures (p=0.035. CMS, forward elevation, and abduction were inversely correlated with age and delay in surgery. There was statistical significance between the patients had complications and those not in terms of CMS, forward elevation and, abduction (p=0.029, p=0.017 and p=0.024. Discussion: Functional outcomes of locking plate fixation of proximal humerus fractures are associated with patient related factors, fracture pattern, surgeon and, the implant. When indications are carefully selected, locking plate osteosynthesis yield good outcomes in surgical treatment of 3 or 4-part proximal humerus fractures.

  12. Distal tibial fracture: An ideal indication for external fixation using locking plate

    Institute of Scientific and Technical Information of China (English)

    Jing-wei Zhang; Nabil A.Ebraheim; Ming Li; Xian-Feng He; Joshua Schwind; Li-Mei Zhu; Yi-Hui Yu

    2016-01-01

    Objective:To evaluate the feasibility and efficiency of one-stage external fixation by using locking plate in distal tibial fractures.Methods:In this non-control prospective study,28 patients with distal tibial fractures were included and underwent one-stage external fixation by using locking plate.There were 21 males and 7 females,with a mean age of 43 years (19-63).According to AO/OTA fracture classification,there were 9 cases of Type A1,9 of Type A2,10 of Type A3 fractures.There were 21 close and 7 open fractures.The locking plate was placed on the anteromedial aspect of the tibia with 4-5 bicortical screws inserted in both distal metaphysis and diaphysis.The radiographic and clinic results were evaluated.Results:All patients were followed up for the average of 16 months (ranging from 12 to 21 months).The average surgery duration was 38 (25-60) minutes.The mean time to fracture healing were 14.6 ± 2.67,17.5 ± 3.66,and 18.4 ± 3.37 (p < 0.05) weeks in type A1,A2,and A3 fractures respectively.By the end of the follow-ups,the mean AOFAS score were 96.11 ± 2.32,92.67 ± 1.80 and 92.00 ± 2.06 (p > 0.05) in type A1,A2,and A3 fractures respectively.None of nonunion,deep infection,or breakage of screw or plate were observed.Conclusions:Distal tibial fracture was the ideal indication for external fixation using locking plate.The external plating is characterized by ease of performance,less invasive,fewer soft tissue impingement,improved cosmesis,and convenient for removal.

  13. Ex vivo biomechanical evaluation of pigeon (Columba livia) cadaver intact humeri and ostectomized humeri stabilized with caudally applied titanium locking plate or stainless steel nonlocking plate constructs.

    Science.gov (United States)

    Darrow, Brett G; Biskup, Jeffrey J; Weigel, Joseph P; Jones, Michael P; Xie, Xie; Liaw, Peter K; Tharpe, Josh L; Sharma, Aashish; Penumadu, Dayakar

    2017-05-01

    OBJECTIVE To evaluate mechanical properties of pigeon (Columba livia) cadaver intact humeri versus ostectomized humeri stabilized with a locking or nonlocking plate. SAMPLE 30 humeri from pigeon cadavers. PROCEDURES Specimens were allocated into 3 groups and tested in bending and torsion. Results for intact pigeon humeri were compared with results for ostectomized humeri repaired with a titanium 1.6-mm screw locking plate or a stainless steel 1.5-mm dynamic compression plate; the ostectomized humeri mimicked a fracture in a thin cortical bone. Locking plates were secured with locking screws (2 bicortical and 4 monocortical), and nonlocking plates were secured with bicortical nonlocking screws. Constructs were cyclically tested nondestructively in 4-point bending and then tested to failure in bending. A second set of constructs were cyclically tested non-destructively and then to failure in torsion. Stiffness, strength, and strain energy of each construct were compared. RESULTS Intact specimens were stiffer and stronger than the repair groups for all testing methods, except for nonlocking constructs, which were significantly stiffer than intact specimens under cyclic bending. Intact bones had significantly higher strain energies than locking plates in both bending and torsion. Locking and nonlocking plates were of equal strength and strain energy, but not stiffness, in bending and were of equal strength, stiffness, and strain energy in torsion. CONCLUSIONS AND CLINICAL RELEVANCE Results for this study suggested that increased torsional strength may be needed before bone plate repair can be considered as the sole fixation method for avian species.

  14. STUDY OF FUNCTIONAL OUTCOME OF DISTAL FEMUR FRACTURES TREATED BY OPEN REDUCTION AND INTERNAL FIXATION WITH LOCKING COMPRESSION PLATE

    Directory of Open Access Journals (Sweden)

    Sahaya R

    2016-04-01

    Full Text Available BACKGROUND Distal femur fractures account for about 7% of all femur fractures. These fractures can lead to knee stiffness and have the tendency to collapse into varus. The management of distal femur fractures has seen a paradigm shift from nonoperative measures to biological fixation and evolution of modern implants like Locking Compression Plate has been used in current times. With the use of Locking Compression Plate double plating can be avoided. In our study, we have evaluated the short-term Functional Outcome of patients who underwent open reduction internal fixation with Locking Compression Plate using Sander’s criteria. Ours is both prospective and retrospective study of 20 patients with distal femur fractures treated operatively from April 2013 to October 2015. Our surgical modality of treatment is open reduction and internal fixation with locking compression plate using standard lateral approach. We have used AO classification to classify the distal femur fractures. With the results of our study, we have come to a conclusion that locking compression plate is a best option for both intra-articular and extra-articular distal femur fractures. It avoids the use of dual plating of distal femur which requires extensive soft tissue stripping in both sides, resulting in reduced blood supply, potential non-union and implant failure. Locking Compression Plate also helps in anatomical reduction of comminuted intra-articular fractures and it could also be used effectively in osteoporotic bone.

  15. Evidence based postoperative treatment of distal radius fractures following internal locking plate fixation.

    Science.gov (United States)

    Klein, S M; Prantl, L; Koller, M; Vykoukal, J; Dolderer, J H; Graf, S; Nerlich, M; Loibl, M; Geis, S

    2015-01-01

    Originally, the treatment method of choice for distal radial fractures (DRF) has been a non-operative approach with six to eight weeks of plaster casting. The introduction of volar locking plate systems at the beginning of the 21 st century has pushed trends towards open reduction and internal fixation (ORIF). While the introduction of fixed angle locking plates together with the increasing knowledge on wrist function and related variable outcomes has led to consensus that operative fixation in instable DRF is the treatment method of choice, there is no agreement on a postoperative care of these injuries. The authors will discuss the available evidence for current concepts of postoperative treatment of DRFs following fixed angle fixation under socioeconomical, biomechanical and burden of disease aspects. Further, relevant randomized controlled trials are evaluated with regard to applied postoperative treatment regimes and related risks for complications.

  16. A multiresolution finite element method based on a new locking-free rectangular Mindlin plate element

    CERN Document Server

    Xia, Yi-Ming

    2015-01-01

    A locking-free rectangular Mindlin plate element with a new multi-resolution analysis (MRA) is proposed and a multireolution finite element method is hence presented. The MRA framework is formulated out of a mutually nesting displacement subspace sequence. The MRA endows the proposed element with the resolution level (RL) to adjust the element node number, thus modulating structural analysis accuracy accordingly. As a result, the traditional 4-node rectangular Mindlin plate element and method is a mono-resolution one and also a special case of the proposed element and method. The meshing for the monoresolution plate element model is based on the empiricism while the RL adjusting for the multiresolution is laid on the rigorous mathematical basis. The accuracy of a structural analysis is actually determined by the RL, not by the mesh. The rational MRA enables the implementation of the multiresolution Mindlin plate element method to be more rational and efficient than that of the conventional monoresolution or o...

  17. Biomechanical Property of a Newly Designed Assembly Locking Compression Plate: Three-Dimensional Finite Element Analysis

    Directory of Open Access Journals (Sweden)

    Jiang-Jun Zhou

    2017-01-01

    Full Text Available In this study, we developed and validated a refined three-dimensional finite element model of middle femoral comminuted fracture to compare the biomechanical stability after two kinds of plate fixation: a newly designed assembly locking compression plate (NALCP and a locking compression plate (LCP. CT data of a male volunteer was converted to middle femoral comminuted fracture finite element analysis model. The fracture was fixated by NALCP and LCP. Stress distributions were observed. Under slow walking load and torsion load, the stress distribution tendency of the two plates was roughly uniform. The anterolateral femur was the tension stress area, and the bone block shifted toward the anterolateral femur. Maximum stress was found on the lateral border of the number 5 countersink of the plate. Under a slow walking load, the NALCP maximum stress was 2.160e+03 MPa and the LCP was 8.561e+02 MPa. Under torsion load, the NALCP maximum stress was 2.260e+03 MPa and the LCP was 6.813e+02 MPa. Based on those results of finite element analysis, the NALCP can provide adequate mechanical stability for comminuted fractures, which would help fixate the bone block and promote bone healing.

  18. Interface contact profiles of a novel locking plate and its effect on fracture healing in goat

    Institute of Scientific and Technical Information of China (English)

    WEI Da-cheng; ZHAO Yu-feng; XING Shu-xing; WANG Ai-min

    2010-01-01

    Objective: To evaluate the interface characteristics of the new-designed locking plate (LP) and limited contact-dynamic compression plate (LC-DCP) and compare the fracture healing between LP and LC-DCP in a goat tibia fracture model.Methods: Eight-hole LP and LC-DCP were applied to fix flesh goat tibiae in a reproducible manner. The average pressure, force and interface contact area were calculated using Fuji prescale pressure sensitive film interposed among the plate and the bone and image analysis system. Eighthole LP and LC-DCP were applied to each tibia in a goat tibia fracture model. The fracture healing was evaluated by X-ray photography at postoperative 8 weeks. The goats were sacrificed at postoperative 12 weeks. Three-point bending test was conducted in the tibiae.Results: The interface contact of LP system was smaller than that ofLC-DCP (P<0.05), while interface contact force of LP system was higher than that of LC-DCP (P<0.05). Radiographs revealed that the fracture line disappeared in the LP group, while the fracture line was visible in DCP group at postoperative 8 weeks. At postoperative 12 weeks, the bending strength and bending load of fractured tibia were higher in LP group than in DCP group, respectively.Conclusion: The new-designed locking plate can significantly decrease the contact area on the bone interface,which further provides better fracture healing than conventional plates.

  19. One size does not fit all: distal radioulnar joint dysfunction after volar locking plate fixation.

    Science.gov (United States)

    Jones, Christopher W; Lawson, Richard D

    2014-02-01

    Background Fractures of the distal radius are among the most common injuries treated by orthopedic surgeons worldwide. Failure to restore distal radius alignment can lead to fracture malunion and poor clinical outcomes, including distal radioulnar joint (DRUJ) instability and limitation of motion. Case Description We present a unique case of DRUJ dysfunction following volar plate fixation of bilateral distal radius fractures and analyze the biomechanical causes of this complication. As a result of a relatively excessive tilt of the precontoured locking plate (in comparison to the patient's particular anatomy), the fracture on one side was "over-reduced," disrupting the biomechanics of the DRUJ, causing a supination block. Clinical Relevance Volar locking plates are not a panacea to all distal radius fractures. Plate selection and fixation technique must include consideration of patient anatomy. Robust plates offer the advantage of providing rigid fixation but can be difficult to contour when reconstructing normal anatomy. Restoration of patient-specific anatomy is crucial to the management of distal radius fractures.

  20. Outcomes of pin and plaster versus locking plate in distal radius intraarticular fractures.

    Science.gov (United States)

    Bahari-Kashani, Mahmoud; Taraz-Jamshidy, Mohammad Hosein; Rahimi, Hassan; Ashraf, Hami; Mirkazemy, Masoud; Fatehi, Amirreza; Asadian, Mariam; Rezazade, Jafar

    2013-01-01

    Distal radius fractures are among the most prevalent fractures predictive of probable occurrence of other osteoporotic fractures. They are treated via a variety of methods, but the best treatment has not been defined yet. This study was performed to compare the results of open reduction and internal fixation with locking plates versus the pin and plaster method. In this prospective study, 114 patients aged 40 to 60 years with Fernandez type III fracture referring to Imam-Reza and Mehr hospitals of Mashhad from 2009 to 2011, were selected randomly; after obtaining informed consent, they were treated with pin and plaster fixation (n = 57) or internal fixation with the volar locking plate (n = 57). They were compared at the one year follow up. Demographic features and standard radiographic indices were recorded and MAYO, DASH and SF - 36 tests were performed. Data was analyzed by SPSS software version 13, with descriptive indices, Mann-Whitney and Chi-square tests. SF-36 test demonstrated a better general health (P plaster group. Also, in the LCP group mean MAYO score (P plaster group. Mean DASH score was not different between the groups (P = 0.218). The rate of acceptable results of radiographic indices (P plaster method. In treatment of intra-articular distal radius fractures in middle-aged patients internal fixation with locking plates may be prefered to pin and plaster as the treatment of choice.

  1. FUNCTIONAL AND RADIOLOGICAL OUTCOME OF DISTAL FEMORAL FRACTURES TREATED WITH LOCKING COMPRESSION PLATE

    Directory of Open Access Journals (Sweden)

    Muktevi

    2015-05-01

    Full Text Available AIM: To evaluate the clinical and radiological outcome in the management of distal femur fractures treated by distal femoral locking compression plate. BACKGROUND : Distal femur fractures are one of the common fractures occurring in road traffic accidents. Different treatment modalities with varying outcomes are seen in literature in the management of th e s e fractures. MATERIALS & METHODS: The study was con ducted in the department of orthopaedics at the Kamineni Institute of Medical sciences Narketpally. Patients treated for distal femur fractures with ORIF using distal femoral locking compression plates were evaluated to assess their clinical and functional results using Neer’s scoring system and compared with the available literature. RESULTS: The mean time for union was 20 wks. With mean time to full weight bearing being 10.5 wks . CONCLUSION: Surgery in the form of ORIF with distal femoral locking compression plate for Distal femur fracture is a comparatively good treatment option for better out come and early mobilization with minimum complications.

  2. Comparison between two angular stable locking plates for medial opening-wedge high tibial osteotomy: Decisive wedge locking plate versus TomoFix™.

    Science.gov (United States)

    Shin, Young-Soo; Kim, Keong-Ho; Sim, Hyun-Bo; Yoon, Jung-Ro

    2016-11-01

    An adequate stable fixation implant should be used for medial opening-wedge high tibial osteotomy (MOWHTO) to promote rapid bone healing without complications. This study compared the radiographic and clinical outcomes as well as plate-specific complications between two angular stable locking plates in patients following MOWHTO. This prospective study involved 97 patients (50 with DWL(®), group I; 47 with TomoFix™, group II) undergoing MOWHTO for primary medial compartment osteoarthritis between 2010 and 2013. Clinical and radiographic evaluations were performed by using the HSS and WOMAC scores, and calculating mechanical femorotibial angle (mFTA), medial proximal tibial angle (MPTA), joint line convergence angle (JLCA), and posterior tibial slope (PTS) on radiographs both preoperatively and after 3 years. A statistically significant difference was observed for the MPTA at the last follow-up between the two groups (P = 0.033). Additionally, the last follow-up MPTA of group I was associated with the osteotomy technique (P = 0.004) and preoperative JLCA (P = 0.034) whereas the last follow-up MPTA of group II was associated with gender (P = 0.001) and BMI (P = 0.008). Furthermore, the results showed that group I had a higher rate of non-union (4%) compared to that in group II (0%). Both locking plates are useful tools in the treatment of medial compartment knee osteoarthritis with varus deformity in young, active patients. However, under special consideration of the complication we found in present study, the TomoFix™ seems to be a better alternative in using the MOWHTO for highly demanding patients. Copyright © 2016 The Japanese Orthopaedic Association. Published by Elsevier B.V. All rights reserved.

  3. Contralateral reversed distal femoral locking plate for fixation of subtrochanteric femoral fractures

    Institute of Scientific and Technical Information of China (English)

    Paritosh Gogna; Reetadyuti Mukhopadhyay; Amanpreet Singh; Ashish Devgan; Sahil Arora; Amit Batra; Sushil Kumar Yadav

    2015-01-01

    Purpose:Subtrochanteric fractures of the femur are being managed successfully with various intramedullary and extramedulary implants with reasonable success.However,these implants require precise placement under image intensifier guidance,which exposes the surgeon to substantial amount of radiation.It also restricts the management of these fractures at peripheral centers where facility of image intensifiers is not available.Keeping this in mind we designed this study to identify if contralateral reversed distal femoral locking plate can be used successfully without the use of image intensifier.Methods:Twenty-four consecutive patients (18 men and 6 women) with a mean age of 28 years (range 19-47 years) suffering subtrochanteric fractures of the femur underwent open reduction and internal fixation with reversed contralateral distal femoral locking plate.The outcome was assessed at the mean follow-up period of 3.2 years (range 2-4.6 years) using the Harris hip score.Results:Twenty-one fractures united with the primary procedure,with a mean time of consolidation being 11 weeks (range,9-16 weeks).One patient developed superficial suture line infection,which resolved with oral antibiotics.Another patient had a fall 3 weeks after surgery and broke the plate.Repeat surgery with reversed distal femoral locking compression plate was performed along with bone grafting and the fracture united.Two cases had nonunion,which went in for union after bone grafting.The mean Harris hip score at the time of final follow-up was 90.63 (range 82-97).Conclusion:The reversed contralateral distal femoral plate is a biomechanically sound implant,which when used for fixation of the subtrochanteric fractures with minimal soft tissue stripping shows results comparable to those achieved by using other extramedullary implants as well as intramedullary devices.The added advantage of this implant is its usability in the absence of an image intensifier.

  4. Effect of fixing distal radius fracture with volar locking palmar plates while preserving pronator quadratus

    Institute of Scientific and Technical Information of China (English)

    Fan Jian; Chen Kai; Zhu Hui; Jiang Bo; Yuan Feng; Zhu Xiaozhong; Mei Jiong

    2014-01-01

    Background L-shaped incision of pronator quadratus (PQ) muscle along its radial and distal borders was always taken for distal radius fractures reduction and internal fixation.Repair of the PQ muscle was always recommended at the end of operation for some instructive reasons.But repair of PQ is not satisfied because of poor quality of muscle and fascial tissues which may cause pain or impede forearm pronation and supination for post-operative scarring around PQ.Inserting the locking palmar plate to pass under the pronator quadratus muscle and the locking screws are inserted through miniincisions in pronator quadratus in some patients with distal radius fractures is a reasonable technique which can preserve the pronator quadratus.The purpose of this study was to evaluate and compare the clinical effects after volar plating of the distal radius fractures while preserving the pronator quadratus and pronator quadratus repair.Methods Between September 2010 and April 2012,65 patients (42 males and 23 females; aged 20-68 years and a mean age of 42.5 years) with distal radius fracture underwent open reduction and internal fixation using the volar locking palmar plates (Depuy or Smith companies).The patients were classified as 23A-2 through 23C-3 according to the Orthopaedic Trauma Association (OTA) classifications.All surgeries were completed by the same trained team.The volar locking palmar plates of distal radius performed with preserving pronator quadratus group involved 30 patients including 19 males and 11 females and performed with pronator quadratus repair group involved 35 patients including 23 males and 12 females.We compared the two groups for wrist pain,forearm range of motion,grip strength,pedoperative complications and wrist functional recovery score.Results The minimum follow-up for the whole cohort was one year.The differences between the two groups were significant with regard to wrist pain,forearm range of motion,grip strength and wrist function at 1,2,and

  5. Planar gas chromatography column on aluminum plate with multi-walled carbon nanotubes as stationary phase

    Science.gov (United States)

    Platonov, I. A.; Platonov, V. I.; Pavelyev, V. S.

    2016-04-01

    The high selectivity of the adsorption layer for low-boiling alkanes is shown, the separation factor (α) couple iso-butane / butane is 1.9 at a column temperature of 50 °C.The paper presents sorption and selective properties of planar gas chromatography column on aluminum plate with multi-walled carbon nanotubes as the stationary phase.

  6. Planar gas chromatography column on glass plate with nanodispersed silica as the stationary phase

    Science.gov (United States)

    Platonov, I. A.; Platonov, V. I.; Pavelyev, V. S.; Agafonov, A. N.

    2016-04-01

    The paper presents the GC column in the plane of the glass plate with the adsorption layer nanodispersed silica. Created gas chromatographic column allows to separate a mixture of five alkanes from pentane to nonane in isothermal (90 ° C) mode less than one minute.

  7. Short-term follow-up of pertrochanteric fractures treated using the proximal femoral locking plate.

    Science.gov (United States)

    Johnson, Benjamin; Stevenson, Jonathan; Chamma, Ramsey; Patel, Amit; Rhee, Shin-Jae; Lever, Caroline; Starks, Ian; Roberts, Phillip J

    2014-05-01

    The proximal femoral locking compression plate is a fixed angled anatomically contoured stainless steel plate used to treat pertrochanteric fractures of the proximal femur. Recent reports quote a high failure rate associated with this implant. We aimed to identify the common methods of failure and determine the elements of surgical techniques that could be altered to potentially improve outcomes should this implant be used for the treatment of unstable pertrochanteric fractures. Retrospective chart analysis. Three separate centers. Twenty-nine patients with 29 fractures. All patients were treated for pertrochanteric fractures using the proximal femoral locking compression plate. The patient demographics, fracture classification, implant details, and complications. Twelve of 29 fractures (41.4%) suffered a complication associated with the implant, and 83% of these occurred in elderly women. Complications included bending, backing-out, fracture, or cut-out of the proximal screws and plate fracture. Common technical errors included the following: (1) leaving the plate proud proximally, (2) malposition of the proximal screws within the femoral neck/head, (3) inappropriate use of the hook plate, (4) creating too ridged a construct when used as a bridging plate. Our experience with the use of this implant suggests an unacceptably high failure rate (41.4%). A knowledge of the common pitfalls encountered when using this device is critical in an effort to reduce failure rates. Based on our data, we would urge caution when considering this device for unstable pertrochanteric fractures, especially in the elderly female. Prognostic Level IV. See Instructions for Authors for a complete description of levels of evidence.

  8. Proximal Humeral Fractures: A Biomechanical Comparison of Locking Plate Constructs in a Cadaveric 3-Part Fracture Model

    OpenAIRE

    2010-01-01

    The purpose of our study was to biomechanically compare, under cyclic loading conditions, fracture site motion, humeral head collapse, and intra-articular hardware penetration in simulated 3-part osteoporotic proximal humeral fractures stabilized with 1 of 2 locking-plate constructs. We performed fixation on simulated 3-part proximal humeral fractures in 10 pairs of cadaveric osteoporotic humeri with a Hand Innovations S3 Proximal Humerus Plate (S3 plate) or an LCP Proximal Humerus Plate (LCP...

  9. The mechanical behavior of locking compression plates compared with dynamic compression plates in a cadaver radius model.

    Science.gov (United States)

    Gardner, Michael J; Brophy, Robert H; Campbell, Deirdre; Mahajan, Amit; Wright, Timothy M; Helfet, David L; Lorich, Dean G

    2005-10-01

    The purpose of this cadaveric study was to compare the mechanical behavior of a locked compression plate, which uses threaded screw heads to create a fixed angle construct, with a dynamic compression plate construct in a cadaver radius model. Mechanical study with cyclic testing and high-speed optical motion analysis. Biomechanics laboratory at an academic institution. Eighteen pairs of fresh-frozen human cadaver radii were divided into 3 groups of 6 to be tested as a group in each of the following force applications: anteroposterior (AP) bending, mediolateral bending, or torsion. Each bone was osteotomized leaving a 5-mm fracture gap and then fixed with a plate. For each pair, 1 radius received a standard plate (limited-contact dynamic compression plates; LC-DCP), the contralateral radius was fixed with a locking compression plate (LCP), and specimens underwent cyclic loading. Normalized stiffness, average energy absorbed, and Newton-cycles to failure were calculated. In addition, a 3-dimensional, high-speed, infrared motion analysis system was used to evaluate motion at the fracture site. Construct stiffness, fracture site motion, cycles to failure, and energy absorption. Repeated measures ANOVA were used to detect differences between groups with time. In the torsion group, LCP specimens failed at 60% greater Newton-cycles than the LC-DCP (1473 vs. 918; P different biomechanical behavior with time. As cycling progressed in the LC-DCP specimens under torsion testing, stiffness (measured at the actuator at the bone ends) did not change significantly; however, fracture motion (measured at the fracture surfaces) decreased significantly (P = 0.04). The LCP specimens did not display similar behavior. Our findings indicated that LCP constructs may demonstrate subtle mechanical superiority compared with the LC-DCP. The LCP specimens had less energy absorption in the AP group and survived longer in the torsion group. Discordance of motion between measurement regions was

  10. Recovery of Caprolactam from Waste Water in Caprolactam Production Using Pulsed—sieve—plate Extraction column

    Institute of Scientific and Technical Information of China (English)

    LIUJiangqing; XIEFangyou; 等

    2002-01-01

    Recovery of caprolactam from waste water of caprolactam production factory was investigated using benzence as solvent in a small-scale pulsed-sieve-plate column.First,liquid-liquid equilibrium (LLE) deta were measured,including water-caprolactam-benzene system at low caprolactam concentrations,and waste water-benzene system.Then,the operating regions and mass transfer of the pulsed-sieve-plate column were measured.Finally,the overall apparent heights of a transfer unit based on continuous phase are correlated in terms of the column operation variables.

  11. Thin circular plate uniformaly loaded over a concentric elliptic path and supported on columns

    Directory of Open Access Journals (Sweden)

    W. A. Bassali

    1986-01-01

    Full Text Available Within the limitations of the classical thin plate theory expressions are obtained for the small deflections of a thin isotropic circular plate uniformly loaded over a concentric ellipse and supported by four columns at the vertices of a rectangle whose sides are parallel to the axes of the ellipse. Formulae are given for the moments and shears at the centre of the plate and on the edge. Limiting cases are investigated.

  12. A Biomechanical Comparison of Locking Versus Conventional Plate Fixation for Distal Fibula Fractures in Trimalleolar Ankle Injuries.

    Science.gov (United States)

    Nguyentat, Annie; Camisa, William; Patel, Sandeep; Lagaay, Pieter

    2016-01-01

    Previous biomechanical studies have advocated the use of locking plates for isolated distal fibula fractures in osteoporotic bone. Complex rotational ankle injuries involve an increased number of fractures, which can result in instability, potentially requiring the same fixed angle properties afforded by locking plates. However, the mechanical indication for locking plate technology has not been tested in this fracture model. The purpose of the present study was to compare the biomechanical properties of locking and conventional plate fixation for distal fibula fractures in trimalleolar ankle injuries. Fourteen (7 matched pairs) fresh-frozen cadaver leg specimens were used. The bone mineral density of each was obtained using dual x-ray absorptiometry scans. The fracture model simulated an OTA 44-B3.3 fracture. The syndesmosis was not disrupted. Each fracture was fixated in the same fashion, except for the distal fibula plate construct: locking (n = 7) and one-third tubular (n = 7). The specimens underwent axial and torsional cyclic loading, followed by torsional loading to failure. No statistically significant differences were found between the locking and conventional plate constructs during both fatigue and torque to failure testing (p > .05). Our specimen bone mineral density averages did not represent poor bone quality. The clinical implication of the present study is that distal fibular locking plates do not provide a mechanical advantage for trimalleolar ankle injuries in individuals with normal bone density and in the absence of fracture comminution. Copyright © 2016 American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

  13. Biomechanical evaluation of Caspar and Cervical Spine Locking Plate systems in a cadaveric model.

    Science.gov (United States)

    Clausen, J D; Ryken, T C; Traynelis, V C; Sawin, P D; Dexter, F; Goel, V K

    1996-06-01

    There exist two markedly different instrumentation systems for the anterior cervical spine: the Cervical Spine Locking Plate (CSLP) system, which uses unicortical screws with a locking hub mechanism for attachment, and the Caspar Trapezial Plate System, which is secured with unlocked bicortical screws. The biomechanical stability of these two systems was evaluated in a cadaveric model of complete C5-6 instability. The immediate stability was determined in six loading modalities: flexion, extension, right and left lateral bending, and right and left axial rotation. Biomechanical stability was reassessed following fatigue with 5000 cycles of flexion-extension, and finally, the spines were loaded in flexion until the instrumentation failed. The Caspar system stabilized significantly in flexion before (p < 0.05) but not after fatigue, and it stabilized significantly in extension before (p < 0.01) and after fatigue (p < 0.01). The CSLP system stabilized significantly in flexion before (p < 0.01) but not after fatigue, and it did not stabilize in extension before or after fatigue. The moment needed to produce failure in flexion did not differ substantially between the two plating systems. The discrepancy in the biomechanical stability of these two systems may be due to differences in bone screw fixation.

  14. A RETROSPECTIVE STUDY OF PROXIMAL HUMERUS INTERNAL LOCKING SYSTEM PLATING FOR DISPLACED PROXIMAL HUMERUS FRACTURES

    Directory of Open Access Journals (Sweden)

    Kumarswami Ramulu

    2016-05-01

    Full Text Available AIM The aim of the present study was to evaluate the functional outcome, benefits and complications of open reduction and internal fixation of displaced proximal humerus fractures with proximal humerus locking plate. METHODS We studied the functional outcome of 40 patients aged between 15 to 65 years from September 2013 to February 2015, who had displaced proximal humerus fracture and underwent PHILOS plate fixation for the same. Fractures were classified according to NEER’s and AO classification. Patients were followed up for a minimum period of 1 year. Functional outcomes and shoulder range of movement were assessed based on the Constant and Murley scoring system. RESULTS Patients were followed up for 12 months. All fractures healed satisfactorily; 12 weeks (27.5% was the most common union time (radiological finding in the study population followed by 8 weeks (22.5% and 10 weeks (20%. Avascular necrosis was noted in 1 patient, mild infection in 2 patients and stiffness in 2 patients. The mean Constant score at 6 weeks was 40.39, at 12 weeks was 59.24, at 6 months was 73.88 and at one year was 75.62. Constant score continues to improve till 1 year. CONCLUSION Proximal humerus locking plate gives a reliable, stable fixation for fractures of proximal humerus with a good radiological union and good functional outcome.

  15. Early outcomes of proximal humerus fracture fixation with locking plate and intramedullary fibular strut graft.

    Science.gov (United States)

    Tan, Edwin; Lie, Denny; Wong, M K

    2014-09-01

    Proximal humerus fractures are commonly encountered in elderly patients. Surgical treatment demonstrates high complication rates, including varus construct collapse and screw cutout. In this study, the authors evaluate the clinical outcome of locking plate fixation with intramedullary fibular strut graft augmentation as a primary surgical treatment in the prevention of early collapse and screw cutout. A total of 9 patients were evaluated. Surgery was performed for displaced proximal humerus fractures between April and December 2011. Patients were either class 2, 3, or 4, according to Neer classification. Mean patient age was 75.4 years. Preoperative and immediate, 6-week, and 3-month postoperative radiographs were evaluated. Head-shaft angles were measured to assess for varus collapse and displacement. Range of motion, complication rates, and functional recovery were also evaluated. Patients underwent open reduction and internal fixation with placement of an intramedullary fibular strut graft. Fixation was achieved with a Philos plate (Synthes, Oberdorf, Switzerland). Reduction and fixation were evaluated with radiographs. Passive exercises and range of motion were allowed immediately postoperatively, and all patients achieved active abduction and forward flexion 6 weeks postoperatively. Shoulder radiographs taken 12 weeks postoperatively revealed no loss of reduction or screw cutout. The introduction of the locking plate has improved outcomes. The addition of an intramedullary strut graft has shown improved preliminary results. Maintained reduction was observed in all 9 patients in the early postoperative period, and good functional motion was achieved. No incidence of screw cutout was recorded.

  16. Treatment of proximal humeral fractures using anatomical locking plate: correlation of functional and radiographic results

    Directory of Open Access Journals (Sweden)

    Antonio Carlos Tenor Junior

    2016-06-01

    Full Text Available ABSTRACT OBJECTIVE: To correlate the functional outcomes and radiographic indices of proximal humerus fractures treated using an anatomical locking plate for the proximal humerus. METHODS: Thirty-nine patients with fractures of the proximal humerus who had been treated using an anatomical locking plate were assessed after a mean follow-up of 27 months. These patients were assessed using the University of California Los Angeles (UCLA score and their range of motion was evaluated using the method of the American Academy of Orthopedic Surgeons on the operated shoulder and comparative radiographs on both shoulders. The correlation between radiographic measurements and functional outcomes was established. RESULTS: We found that 64% of the results were good or excellent, according to the UCLA score, with the following means: elevation of 124°; lateral rotation of 44°; and medial rotation of thumb to T9. The type of fracture according to Neer's classification and the patient's age had significant correlations with the range of motion, such that the greater the number of parts in the fracture and the greater the patient's age were, the worse the results also were. Elevation and UCLA score were found to present associations with the anatomical neck-shaft angle in anteroposterior view; fractures fixed with varus deviations greater than 15° showed the worst results (p < 0.001. CONCLUSION: The variation in the neck-shaft angle measurements in anteroposterior view showed a significant correlation with the range of motion; varus deviations greater than 15° were not well tolerated. This parameter may be one of the predictors of functional results from proximal humerus fractures treated using a locking plate.

  17. Open Reduction and Internal Fixation of Displaced Calcaneum, Intra-Articular Fractures by Locking Calcaneal Plate

    Science.gov (United States)

    Santosha; Singh, Arambam Mahendra; Waikhom, Sanjib; Pakhrin, Vishal; Mukherjee, Sagnik; Debbarma, Rajkumar; Prashant, Prabhu Shrinivas

    2016-01-01

    Introduction Calcaneal fractures constitute the most common fractures in hindfoot. Lots of controversies exist in the management of calcaneal fractures but now-a-days, it is preferable to perform open reduction and internal fixation and early mobilizatation. Aim To evaluate the functional outcome after open reduction and internal fixation of displaced intra-articular fractures of the calcaneum by locking calcaneal plate. Materials and Methods The study was conducted in the Department of Orthopaedic Surgery from September 2013 to April 2016. Thirty intra-articular fractures of the calcaneum were treated by locking calcaneal plate. Patients were followed up for a period of 24 months. Bohler’s angle was measured in preoperative, immediate Post-operative period and after 2 years, follow-up was compared. Results were evaluated according to American Orthopaedic Foot and Ankle Society (AOFAS) Score. Results After 24 months of follow-up, all 24 patients were available for evaluation. Radiological union was achieved in a mean time of 12.5 weeks. Mean duration of hospital stay was 21 days. Bohler’s angle was significantly higher after 2 years of follow-up when compared with preoperative x-ray. According to the AOFAS, Ankle–Hind foot Scale outcome score results were excellent in 43.3% of the patients, good in 33.3%, fair in 10%, and poor in 13.3% of patients. The mean AOFAS score was 79.9 (Range 49-96). Conclusion Open reduction and internal fixation of intra-articular fractures of the calcaneum with locking calcaneal plate gives good results. Maintenance of calcaneal height and Bohler’s angle helps to decrease the incidence of subtalar arthritis. PMID:28208957

  18. Outcome analysis following removal of locking plate fixation of the proximal humerus

    Directory of Open Access Journals (Sweden)

    Fischer Florian

    2008-10-01

    Full Text Available Abstract Background Concerning surgical management experience with locking plates for proximal humeral fractures has been described with promising results. Though, distinct hardware related complaints after fracture union are reported. Information concerning the outcome after removal of hardware from the proximal humerus is lacking and most studies on hardware removal are focused on the lower extremity. Therefore the aim of this study was to analyze the functional short-term outcome following removal of locking plate fixation of the proximal humerus. Methods Patients undergoing removal of a locking plate of the proximal humerus were prospectively followed. Patients were subdivided into the following groups: Group HI: symptoms of hardware related subacromial impingement, Group RD: persisting rotation deficit, Group RQ: patients with request for a hardware removal. The clinical (Constant-Murley score and radiologic (AP and axial view follow-up took place three and six months after the operation. To evaluate subjective results, the Medical Outcomes Study Short Form-36 (SF-36, was completed. Results 59 patients were included. The mean length of time with the hardware in place was 15.2 ± 3.81 months. The mean of the adjusted overall Constant score before hardware removal was 66.2 ± 25.2% and increased significantly to 73.1 ± 22.5% after 3 months; and to 84.3 ± 20.6% after 6 months (p Conclusion A significant improvement of clinical outcome following removal was found. However, a general recommendation for hardware removal is not justified, as the risk of an anew surgical and anesthetic procedure with all possible complications has to be carefully taken into account. However, for patients with distinct symptoms it might be justified.

  19. Use of a Proximal Humeral Locking Plate for Complex Ankle and Hindfoot Fusion.

    Science.gov (United States)

    Shearman, Alexander D; Eleftheriou, Kyriacos Iordanis; Patel, Akash; Pradhan, Rajib; Rosenfeld, Peter Francis

    2016-01-01

    Arthrodesis of the ankle and hindfoot in the setting of major deformity is challenging and associated with substantial risks. Patients often have significant comorbidities that lead to unforgiving soft tissues, poor vascularity, and poor bone quality. This creates the high-risk scenario of poor wound healing and poor implant fixation. Complications can be devastating, leading to loss of the limb and sepsis. The use of locking plate technology might provide biomechanical and operative technique advantages in such patients. We retrospectively assessed the results of the modified use of the PHILOS(™) (Synthes(®), Zuchwil, Switzerland) proximal humeral locking plate in 21 patients (11 males, 10 females; mean age 56.1 years, range 25 to 74 years) who had undergone complex fusions, including tibiotalar (n = 4), tibiocalcaneal (n = 7), or tibiotalocalcaneal (n =10) fusions. The average follow-up period was 14.6 (median 10, range 6 to 49) months. Of the 21 fusions, 18 achieved union (85.7%) at an average period of 4.8 (median 4.3, range 3 to 12) months. The overall deep infection rate was 14.3%. Overall, 17 of the 21 patients (81%) were satisfied with the result (good to excellent), 1 reported the result was fair (4.8%), and 3 patients developed nonunion and were dissatisfied with the procedure (14.3%). The present study is the largest series to date of patients undergoing complex ankle and hindfoot arthrodesis with the use of a proximal humeral locking plate and confirms previous findings that the technique is reliable with union, satisfaction, and complication rates comparable to those of other techniques.

  20. Rigid-Plastic Post-Buckling Analysis of Columns and Quadratic Plates

    DEFF Research Database (Denmark)

    Jönsson, Jeppe

    2008-01-01

    The objective of this paper is to show the application of a novel approach to the rigid plastic hinge and yield line theory in post-buckling analysis of slender plates and columns. The upper bound theorem of plasticity theory and the associated flow law of plasticity are used to find...... of the post-buckling behaviour. The rigid plastic theory of plates, referred to as yield line theory, involves large rigid parts of the plate mutually rotating about yielding hinge lines, however in order to accommodate in plane plastic deformations area “collapse” yield lines have been introduced. The hinge...... yield lines accommodate differential rotations of rigid parts and the area “collapse” yield lines accommodate local area changes of the rigid parts thereby preserving compatibility of the rigid parts of a plate. The approach will be illustrated for rigid plastic column analysis and for a quadratic plate...

  1. Distal Femoral Locking Compression Plate Fixation in Distal Femoral Fractures: Early Results

    Directory of Open Access Journals (Sweden)

    EJ Yeap

    2007-05-01

    Full Text Available We conducted a retrospective review on eleven patients who were treated for Type A and C distal femoral fractures (based on AO classification between January 2004 and December 2004. All fractures were fixed with titanium distal femoral locking compression plate. The patient’s ages ranged from 15 to 85 with a mean of 44. Clinical assessment was conducted at least 6 months post-operatively using the Schatzker scoring system. Results showed that four patients had excellent results, four good, two fair and one failure.

  2. THE FUNCTIONAL OUTCOME OF LOCKING VS NON-LOCKING DUAL PLATE FIXATION IN INTRAARTICULAR FRACTURE DISTAL END HUMERUS: A RETROSPECTIVE COMPARATIVE STUDY

    Directory of Open Access Journals (Sweden)

    Manish Bairagi

    2016-07-01

    Full Text Available BACKGROUND Despite all advances in treatment, it is a challenge to most of the orthopaedic surgeons to give better result in the management of distal end humerus intra-articular fractures, because it has complex anatomy. This study has been done to evaluate the functional outcome of double plate fixation with right angle to each other for intra-articular fracture of distal end humerus and compared with locking vs non-locking plate fixation. AIM This study has been done to evaluate the functional outcome of double plate fixation with right angle to each other for intraarticular fracture of distal end humerus with comparison of locking and non-locking plate fixation. METHODS This is retrospective comparative study done between 2006 and 2014 in the Department of Orthopaedics, G.R. Medical College and J.A. Group of Hospital, Gwalior (M.P., India. All patients who were presented to Department of Orthopaedics with intra-articular fracture, distal end humerus fracture, medically fit patient who were of age group between 18-80 years of age with close or type 1 GA (Gustilo Anderson compound fracture and fracture type AO type C were included. Other patients who sustained GA type 2 and 3, severely comminuted and severe osteoporotic bone were excluded. RESULT A total no. of 60 patients. The age of patients ranged from 22 to 65 years. To classifying according to AO classification, 15 cases were of type C1, 39 were of type C2 and 06 were of type C3. The results were rated using Jupiter’s criteria as excellent in 26 (43.3% cases, good in 16 (26.7%, fair in 11 (18.3% cases and poor in 07 (11.7%. CONCLUSION Double plate fixation is standard and effective method of treating intra-articular fracture of distal humerus, the method gives a stable fixation and allow early mobilization of elbow joint without risk of implant failure. In the study, there is no much advantage from the locking plate fixation in comparison with the non-locking plates.

  3. Locking internal fixator with minimally invasive plate osteosynthesis for the proximal and distal tibial fractures

    Institute of Scientific and Technical Information of China (English)

    TONG Da-ke; JI Fang; CAI Xiao-bing

    2011-01-01

    Objective: To investigate the efficacy of the locking internal fixator (LIF), which includes the locking compression plate (LCP) and the less invasive stable system (LISS), in the proximal and distal tibial fractures. Methods: We did a retrospective study on a total of 98 patients with either proximal or distal tibial fractures from January 2003 to January 2007, who had received the operation with LIF by the minimally invasive plate osteosynthesis (MIPO) technique. The data consisted of 43 proximal tibial fractures (type AO41C3) and 55 distal tibial fractures (type AO43C3). Results: No complications were observed in all patients after operation. The mean healing time was 8.4 months (range 5-14 months). Only two cases of delayed union occurred at postoperative 10 months. No infections were reported after the definitive surgery even in the cases of open fractures. All patients reached a full range of motion at postoperative 6 to 9 months and regained the normal functions of knee and ankle joints. Conclusion: Using LIF in MIPO technique is a reliable approach towards the proximal and distal tibial fractures that are not suitable for intramedullary nailing.

  4. Flow structures generated by elongated plates settling in a water column

    DEFF Research Database (Denmark)

    Sørensen, Henrik; Jensen, Anna Lyhne; Hærvig, Jakob

    angle of 15° in a 0.60 m x 0.30 m  0.35 m (LBH) glass container filled with water. Continuous Particle Image Velocimetry is used to analyse both the velocity field of the continuous phase and the motion of the plates. The experiments show a well-defined oscillating motion of the plate. A stall occurs...... of the dimensionless moment of inertia and Reynolds number was investigated. The objective of the present work is to collect and present experimental data about the flow structures generated by the settling of elongated plates in a water column. The experiments are carried out by releasing the plates at an initial...... each time the plate changes horizontal direction of motion. The results show a flow building up when the plate accelerates and a vortex rolling off in each turn....

  5. Locking plate fixation combined with iliac crest bone autologous graft for proximal humerus comminuted fracture

    Institute of Scientific and Technical Information of China (English)

    Zhu Lian; Liu Yueju; Yang Zongyou; Li Han; Wang Juan; Zhao Changping; Chen Xiao

    2014-01-01

    Background Although the use of an intramedullary fibular allograft together with locking plate fixation can provide additional medial support and prevent varus malalignment in displaced proximal humeral fractures with promising results,the fibular autograft donor site often sustains significant trauma and cannot restore the articular surface of comminuted fractures.The aim of this study was to evaluate the clinical and radiographic outcomes of a locking plate and crest bone autologous graft for treating proximal humerus comminuted fractures.Methods We assessed the functional outcomes and complication rates in 40 patients with proximal humerus comminuted fractures.Eighteen patients were treated with a locking plate and an autologous crest bone graft (experimental group),and 22 were treated with only the locking plate and no bone graft (control group).Postoperative assessments included radiographic imaging,range of motion analysis,pain level based on the visual analogue scale (VAS),and the SF-36 (Short Form (36) Health Survey),as well as whether patients could retum to their previous occupation.Results All fractures healed both clinically and radiologically in the experimental group.There was no more than 2 mm collapse of the humeral head,and no osteonecrosis or screw penetration of the articular surface.In contrast,two patients had a nonunion in the control group,and they eventually accepted total shoulder replacements.The average time from surgery to radiographic union was significantly shorter in the experimental group ((4.66±1.63) months) compared with the control group ((5.98±1.57) months) (P <0.05).For the experimental versus controls groups,the mean shoulder active flexion (148.00±18.59 vs.121.73±17.20) degrees,extension (49.00±2.22 vs.42.06±2.06) degrees,internal rotation (45.00±5.61 vs.35.00±3.55)degrees,external rotation (64.00±9.17 vs.52.14±5.73)degrees,and abduction (138.00±28.78 vs.105.95±15.66) degrees were all significantly higher (all P

  6. Adult proximal humerus locking plate for the treatment of a pediatric subtrochanteric femoral nonunion: a case report.

    Science.gov (United States)

    Cortes, Luis E; Triana, Miguel; Vallejo, Francisco; Slongo, Theddy F; Streubel, Philipp N

    2011-07-01

    Nonunions of pediatric subtrochanteric femur fractures are exceedingly rare and have to date not been reported in the literature. We present the case of an 11-year-old boy who developed such a nonunion after open reduction internal fixation using a pediatric locked proximal femur plate. Using an adult proximal humerus locking plate, adequate proximal fixation of the nonunion was obtained. Furthermore, previously placed distal screw holes were safely bridged and the biomechanical environment around the nonunion site improved. Uneventful healing was possible with the use of adjuvant bone grafting. No short- or midterm complications occurred. Although other implants can certainly be adapted to a use different than that of its original design, the present case suggests that adult proximal humerus locking plates may be a safe option for revision surgery of the proximal pediatric femur.

  7. Osteosynthesis with long volar locking plates for meta- physeal-diaphyseal fractures of the distal radius

    Directory of Open Access Journals (Sweden)

    Gogna Paritosh

    2013-12-01

    Full Text Available 【Abstract】Objective: Metaphyseal-diaphyseal fractures of the distal radius are a major treatment dilemma and orthopaedic surgeons have to pay due consideration to restoration of anatomy of distal radius together with ro- tation of the radial shaft and maintenance of radial bow and interosseous space. We performed this study to evaluate the clinic-radiological outcome of metaphyseal-diaphyseal fractures of the distal radius treated with long volar locking plates. Methods: This prospective study involved 27 pa- tients (22 males and 5 females with metaphyseal-diaphy- seal fracture of the distal radius. Their mean age was (30.12± 11.48 years (range 19-52 years and the follow-up was 26.8 months (range 22-34 months. All patients underwent open reduction and internal fixation with a long volar locking plate. According to AO/OTA classification, there were 7 type A3, 13 type C2 and 7 type C3 fractures. Subjective assessment was done based on the disabilities of the arm, shoulder and hand (DASH questionnaire. Functional evaluation was done by measuring grip strength and range of motion around the wrist and the radiological determinants included radial angle, radial length, volar angle and ulnar variance. The final as- sessment was done according to Gartland and Werley scor- ing system. Results: Postoperative radiological parameters were well maintained throughout the trial, and there was signifi- cant improvement in the functional parameters from 6 weeks to final follow-up. The average DASH scores improved from 37.5 at 6 weeks to 4.2 at final follow-up. Final assessment using Gartland and Werley scoring system revealed 66.67% (n=18 excellent and 33.33% (n=9 good results. There was one case of superficial infection which responded to antibi- otics and another carpel tunnel syndrome which was ma- naged conservatively. Conclusion: Volar locking plate fixation for metaphy- seal-diaphyseal fractures of distal radius is associated with excellent to good

  8. Outcome of open reduction and internal fixation of intraarticular calcaneal fracture fixed with locking calcaneal plate

    Directory of Open Access Journals (Sweden)

    Jain Saurabh

    2013-12-01

    Full Text Available 【Abstract】Objective: Debate continues regarding the management of calcaneal fractures, between open re- duction and internal fixation and closed treatment. Hence we aim at evaluating the radiological and functional out- comes of open reduction and internal fixation in displaced joint depression type of calcaneal fractures fixed with lock- ing calcaneal plate. Methods: In this series, 28 patients (26 unilateral and 2 bilateral with joint depression type of calcaneal fractures as per Essex-Lopresti classification system were operated on with locking calcaneal plate within 3 weeks of injury. Patients were evaluated in terms of associated injuries and X-rays of anteroposterior, lateral and axial views of the calcaneum. CT scan was done to assess the amount of com- minution and articular depression. Patients were followed up clinically and radiologically at least for 1 year. Radiologi- cal assessment was done by Bohler’s angle and Gissane’s angle along with measurement of calcaneal height and width. Functional outcome was assessed using the American Or- thopaedics Foot and Ankle Society (AOFAS scale. Results: At average follow-up of 14.5 months, average AOFAS score was 86.3 (range 66 to 97, with 86% having excellent to good results and 2 (7.7% and 1 (3.7% having fair and poor results respectively. All patients had stable ankle joint with all having dorsiflexion and plantar flexion more than 30°. Average subtalar range of motion was 17°. The mean Bohler’s angle, mean Gissane’s angle, calcaneal height and width were 25.47°, 121.3°, 4.32 cm and 3.81cm respectively at final follow-up. Three patients had flap ne- crosis at incision site and one had superficial and deep infection. Subtalar arthritis was seen in 5 patients, whereas sural nerve hypoaesthesia in 1 patient. None of the patients had compartment syndrome, heel pad problems, peroneal tendinitis, reflex sympathetic dystropy or implant failure. Conclusion: Open reduction and

  9. A technique using a stellar spectrographic plate to measure terrestrial ozone column depth

    Energy Technology Data Exchange (ETDEWEB)

    Wong, A.Y.

    1995-08-01

    This thesis examines the feasibility of a technique to extract ozone column depths from photographic stellar spectra in the 5000--7000 Angstrom spectral region. A stellar spectrographic plate is measured to yield the relative intensity distribution of a star`s radiation after transmission through the earth`s atmosphere. The amount of stellar radiation absorbed by the ozone Chappuis band is proportional to the ozone column depth. The measured column depth is within 10% the mean monthly value for latitude 36{degree}N, however the uncertainty is too large to make the measurement useful. This thesis shows that a 10% improvement to the photographic sensitivity uncertainty can decrease the column depth uncertainty to a level acceptable for climatic study use. This technique offers the possibility of measuring past ozone column depths.

  10. A technique using a stellar spectrographic plate to measure terrestrial ozone column depth

    Energy Technology Data Exchange (ETDEWEB)

    Wong, Alec Y. [Univ. of California, Berkeley, CA (United States)

    1995-08-01

    This thesis examines the feasibility of a technique to extract ozone column depths from photographic stellar spectra in the 5000--7000 Angstrom spectral region. A stellar spectrographic plate is measured to yield the relative intensity distribution of a star`s radiation after transmission through the earth`s atmosphere. The amount of stellar radiation absorbed by the ozone Chappuis band is proportional to the ozone column depth. The measured column depth is within 10% the mean monthly value for latitude 36{degree}N, however the uncertainty is too large to make the measurement useful. This thesis shows that a 10% improvement to the photographic sensitivity uncertainty can decrease the column depth uncertainty to a level acceptable for climatic study use. This technique offers the possibility of measuring past ozone column depths.

  11. STUDY OF OUTCOME OF DISTAL TIBIAL FRACTURES TREATED WITH LOCKING COMPRESSION PLATES: BY BOTH OPEN REDUCTION AND MIPO TECHNIQUE

    Directory of Open Access Journals (Sweden)

    Ravikiran Nandiraju

    2016-07-01

    Full Text Available BACKGROUND Tibia being the most common fractured long bone of the body; 1. Distal metaphyseal fractures comprise 5-7% of these injures; 2. With or without involving the articular surface. Encouraging results for open reduction and internal fixation (Plate osteosynthesis and closed manual reduction with osteosynthesis with minimal invasive percutaneous locking plates has been noted for lower third tibial fractures. Locking compression plate provides the advantage of anatomic reduction, stable fixation, preservation of blood supply, preventing joint stiffness, less soft tissue injury. METHODS AND MATERIAL This study included (40 patients with distal tibia fractures between 18-65 years presenting in the Department of Orthopaedics in Osmania Medical College and Osmania General Hospital .This is prospective study. These patients are treated with locking compression plates. RESULTS Patients were evaluated using AOFAS7 score for hindfoot scale (100 points. Excellent - 26 (65%, Good - 12 (30%, Fair - 2 (5% comparable to other studies. CONCLUSION Reduction and internal fixation of distal tibial fractures using locking compression plate medially by open and MIPO technique is one of the acceptable forms of treatment for lower third tibia including the articular surface with or without communication.

  12. Folded plate assemblies with branching column supports : interaction and control of overall shape

    NARCIS (Netherlands)

    Falk, A.; Turrin, M.; von Buelow, P.

    2010-01-01

    The work described in this paper aims at developing the interrelation and overall effects of interaction between a folded plate roof structure and a system of branching column supports. In the context of architectural performance it is of interest to discuss the effects of the material on environmen

  13. Osteosynthesis with long volar locking plates for metaphyseal-diaphyseal fractures of the distal radius

    Institute of Scientific and Technical Information of China (English)

    Paritosh Gogna; Harpal Singh Selhi; Rohit Singla; Mukul Mohindra; Amit Batra; Reetadyuti Mukhopadhyay; Rajesh Rohilla

    2013-01-01

    Objective:Metaphyseal-diaphyseal fractures of the distal radius are a major treatment dilemma and orthopaedic surgeons have to pay due consideration to restoration of anatomy of distal radius together with rotation of the radial shaft and maintenance of radial bow and interosseous space.We performed this study to evaluate the clinic-radiological outcome of metaphyseal-diaphyseal fractures of the distal radius treated with long volar locking plates.Methods:This prospective study involved 27 patients (22 males and 5 females) with metaphyseal-diaphyseal fracture of the distal radius.Their mean age was (30.12±11.48) years (range 19-52 years) and the follow-up was 26.8 months (range 22-34 months).All patients underwent open reduction and internal fixation with a long volar locking plate.According to AO/OTA classification,there were 7 type A3,13 type C2 and 7 type C3 fractures.Subjective assessment was done based on the disabilities of the arm,shoulder and hand (DASH) questionnaire.Functional evaluation was done by measuring grip strength and range of motion around the wrist and the radiological determinants included radial angle,radial length,volar angle and ulnar variance.The final assessment was done according to Gartland and Werley scoring system.Results:Postoperative radiological parameters were well maintained throughout the trial,and there was significant improvement in the functional parameters from 6 weeks to final follow-up.The average DASH scores improved from 37.5 at 6 weeks to 4.2 at final follow-up.Final assessment using Gartland and Werley scoring system revealed 66.67%(n=l8) excellent and 33.33% (n=9) good results.There was one case of superficial infection which responded to antibiotics and another carpel tunnel syndrome which was managed conservatively.Conclusion:Volar locking plate fixation for metaphyseal-diaphyseal fractures of distal radius is associated with excellent to good functional outcome,early rehabilitation and minimal complications.

  14. Outcome of open reduction and internal fixation of intraarticular calcaneal fracture fixed with locking calcaneal plate

    Institute of Scientific and Technical Information of China (English)

    Saurabh Jain; Anil Kumar Jain; Ish Kumar

    2013-01-01

    Objective:Debate continues regarding the management of calcaneal fractures,between open reduction and internal fixation and closed treatment.Hence we aim at evaluating the radiological and functional outcomes of open reduction and internal fixation in displaced joint depression type of calcaneal fractures fixed with locking calcaneal plate.Methods:In this series,28 patients (26 unilateral and 2 bilateral) with joint depression type of calcaneal fractures as per Essex-Lopresti classification system were operated on with locking calcaneal plate within 3 weeks of injury.Patients were evaluated in terms of associated injuries and X-rays of anteroposterior,lateral and axial views of the calcaneum.CT scan was done to assess the amount ofcomminution and articular depression.Patients were followed up clinically and radiologically at least for 1 year.Radiological assessment was done by Bohler's angle and Gissane's angle along with measurement ofcalcaneal height and width.Functional outcome was assessed using the American Orthopaedics Foot and Ankle Society (AOFAS) scale.Results:At average follow-up of 14.5 months,average AOFAS score was 86.3 (range 66 to 97),with 86% having excellent to good results and 2 (7.7%) and 1 (3.7%) having fair and poor results respectively.All patients had stable ankle joint with all having dorsiflexion and plantar flexion more than 30°.Average subtalar range of motion was 17°.The mean Bohler's angle,mean Gissane's angle,calcaneal height and width were 25.47°,121.3°,4.32 cm and 3.81cm respectively at final follow-up.Three patients had flap necrosis at incision site and one had superficial and deep infection.Subtalar arthritis was seen in 5 patients,whereas sural nerve hypoaesthesia in 1 patient.None of the patients had compartment syndrome,heel pad problems,peroneal tendinitis,reflex sympathetic dystropy or implant failure.Conclusion:Open reduction and internal fixation with locking calcaneal plate gives sound functional outcome

  15. Outcomes evaluation of locking plate osteosynthesis in displaced fractures of the proximal humerus

    Directory of Open Access Journals (Sweden)

    Mauro Emilio Conforto Gracitell

    2013-12-01

    Full Text Available Objective: To evaluate functional outcomes, radiographic findings and complications of proximal humeral fractures treated with locking plates and to determine prognostic factors for successful clinical outcomes. Methods: Forty patients undergoing internal fixation of fractures of the proximal humerus with the Philos(r plate were included in the study. The surgeries were performed between 2004 and 2011 and the patients underwent radiographic and clinical evaluation, by Constant -Murley and Dash score. Outcomes were analyzed by use of multivariate regression with several different variables. Results: Patients were on average of 61.8 ± 16.28 years, and most were female (70%. The Constant -Murley score was 72.03 ± 14.01 and Dash score was 24.96 ± 19.99. The postoperative radiographs showed a head-shaft angle of 135.43º± 11.82. Regression analysis showed that the patient's age and the Hertel classification influenced the Constant -Murley scale (p = 0.0049 and 0.012, respectively. Other prognostic criteria such as Neer and AO classification, head-shaft angle, the presence of metaphyseal comminution and extension of the humeral metaphyseal fragment showed no effect on prognosis. Complications occurred in four patients (10%. Conclusion: The fixation with the Philos(r plate provided good clinical and radiographic results in fractures of the proximal humerus, with a low complication rate. Patient's age and Hertel classification were defined as prognostic factors that led to worse functional outcomes.

  16. Finite Element-Derived Surrogate Models of Locked Plate Fracture Fixation Biomechanics.

    Science.gov (United States)

    Wee, Hwabok; Reid, J Spence; Chinchilli, Vernon M; Lewis, Gregory S

    2017-03-01

    Internal fixation of bone fractures using plates and screws involves many choices-implant type, material, sizes, and geometric configuration-made by the surgeon. These decisions can be important for providing adequate stability to promote healing and prevent implant mechanical failure. The purpose of this study was to develop mathematical models of the relationships between fracture fixation construct parameters and resulting 3D biomechanics, based on parametric computer simulations. Finite element models of hundreds of different locked plate fixation constructs for midshaft diaphyseal fractures were systematically assembled using custom algorithms, and axial, torsional, and bending loadings were simulated. Multivariate regression was used to fit response surface polynomial equations relating fixation design parameters to outputs including maximum implant stresses, axial and shear strain at the fracture site, and construct stiffness. Surrogate models with as little as three regressors showed good fitting (R (2) = 0.62-0.97). Inner working length was the strongest predictor of maximum plate and screw stresses, and a variety of quadratic and interaction terms influenced resulting biomechanics. The framework presented in this study can be applied to additional types of bone fractures to provide clinicians and implant designers with clinical insight, surgical optimization, and a comprehensive mathematical description of biomechanics.

  17. Treatment of distal clavicle fracture with distal radius volar locking compression plate

    Institute of Scientific and Technical Information of China (English)

    YU Chao; SUN Yue-hua; ZHAO Chang-qing; SHI Ding-wei; WANG You

    2009-01-01

    Objective: To observe the early clinical outcomes of the internal fixation with distal radius volar locking compression plate (LCP) in treatment of distal clavicle fracture.Methods: Six patients with unilateral distal clavicle fractures, identified as type Ⅱ according to Neer classification system, including 4 males and 2 females, were treated with open reduction and internal fixation using a distal radius volar LCP. Bone union was evaluated by routine X-ray radiography, and shoulder joint function were assessed by Constant score system.Results: All fractures achieved bone union at 6 to 8 weeks postoperatively, and Constant scores ranged from 95 to 100 at the postoperative 10 to 12 weeks.Conclusion: Fixation of distal clavicle fracture with distal radius volar LCP demonstrates excellent effects of bone union with rarely early complications, thus providing a new technique to treat distal clavicle fracture.

  18. Complications and functional outcome after fixation of distal tibia fractures with locking plate - A multicentre study

    DEFF Research Database (Denmark)

    Viberg, Bjarke; Kleven, Silje; Hamborg-Petersen, Ellen;

    2016-01-01

    INTRODUCTION: The aim of this study was to evaluate the proportion of complications and the functional outcome following ORIF with low-profile locking plates in patients with distal tibia fractures. METHOD: Retrospective data was retrieved using county databases, operation books, health record...... as minor and major complications, was retrieved from electronic health records and patient interviews. Long-term functional outcome assessed by EuroQol EQ-5D-5L questionnaire, AOFAS Ankle-Hindfoot scale, and return to pre-injury job function through patient interview and examination. RESULTS: There were 32...... 43A, 5 43B and 34 43C-fractures, 12 open and 10 high-energy fractures. Forty-nine cases (69%) experienced complications during the follow-up time, of which 34 were minor complications and 15 were major complications. Median EQ-5D-5L index value was 0.76, median EQ VAS-score was 80, and median AOFAS...

  19. Reverse distal femoral locking compression plate a salvage option in nonunion of proximal femoral fractures

    Directory of Open Access Journals (Sweden)

    Sampat S Dumbre Patil

    2016-01-01

    Full Text Available Background: When primary fixation of proximal femoral fractures with implants fails, revision osteosynthesis may be challenging. Tracts of previous implants and remaining insufficient bone stock in the proximal femur pose unique problems for the treatment. Intramedullary implants like proximal femoral nail (PFN or surface implants like Dynamic Condylar Screw (DCS are few of the described implants for revision surgery. There is no evidence in the literature to choose one implant over the other. We used the reverse distal femur locking compression plate (LCP of the contralateral side in such cases undergoing revision surgery. This implant has multiple options of fixation in proximal femur and its curvature along the length matches the anterior bow of the femur. We aimed to evaluate the efficacy of this implant in salvage situations. Materials and Methods: Twenty patients of failed primary proximal femoral fractures who underwent revision surgery with reverse distal femoral locking plate from February 2009 to November 2012 were included in this retrospective study. There were 18 subtrochanteric fractures and two ipsilateral femoral neck and shaft fractures, which exhibited delayed union or nonunion. The study included 14 males and six females. The mean patient age was 43.6 years (range 22-65 years and mean followup period was 52.1 months (range 27-72 months. Delayed union was considered when clinical and radiological signs of union failed to progress at the end of four months from initial surgery. Results: All fractures exhibited union without any complications. Union was assessed clinically and radiologically. One case of ipsilateral femoral neck and shaft fracture required bone grafting at the second stage for delayed union of the femoral shaft fracture. Conclusions: Reverse distal femoral LCP of the contralateral side can be used as a salvage option for failed fixation of proximal femoral fractures exhibiting nonunion.

  20. Reverse distal femoral locking compression plate a salvage option in nonunion of proximal femoral fractures

    Science.gov (United States)

    Dumbre Patil, Sampat S; Karkamkar, Sachin S; Patil, Vaishali S Dumbre; Patil, Shailesh S; Ranaware, Abhijeet S

    2016-01-01

    Background: When primary fixation of proximal femoral fractures with implants fails, revision osteosynthesis may be challenging. Tracts of previous implants and remaining insufficient bone stock in the proximal femur pose unique problems for the treatment. Intramedullary implants like proximal femoral nail (PFN) or surface implants like Dynamic Condylar Screw (DCS) are few of the described implants for revision surgery. There is no evidence in the literature to choose one implant over the other. We used the reverse distal femur locking compression plate (LCP) of the contralateral side in such cases undergoing revision surgery. This implant has multiple options of fixation in proximal femur and its curvature along the length matches the anterior bow of the femur. We aimed to evaluate the efficacy of this implant in salvage situations. Materials and Methods: Twenty patients of failed primary proximal femoral fractures who underwent revision surgery with reverse distal femoral locking plate from February 2009 to November 2012 were included in this retrospective study. There were 18 subtrochanteric fractures and two ipsilateral femoral neck and shaft fractures, which exhibited delayed union or nonunion. The study included 14 males and six females. The mean patient age was 43.6 years (range 22–65 years) and mean followup period was 52.1 months (range 27–72 months). Delayed union was considered when clinical and radiological signs of union failed to progress at the end of four months from initial surgery. Results: All fractures exhibited union without any complications. Union was assessed clinically and radiologically. One case of ipsilateral femoral neck and shaft fracture required bone grafting at the second stage for delayed union of the femoral shaft fracture. Conclusions: Reverse distal femoral LCP of the contralateral side can be used as a salvage option for failed fixation of proximal femoral fractures exhibiting nonunion. PMID:27512218

  1. The Outcome in Early Cases of Treatment of Subtrochanteric Fractures with Proximal Femur Locking Compression Plate

    Directory of Open Access Journals (Sweden)

    U Gunadham

    2014-07-01

    Full Text Available The objective of this study was to evaluate the outcome in early treatment of subtrochanteric fractures with proximal femur locking compression plate (PF-LCP.The patients included in this study were those with subtrochanteric fractures (AO type 32A-C treated with PF-LCP (Synthes between Jan 2009 and Jun 2011. The patient characteristics and details of clinical conditions were obtained from records. Clinical and radiographic follow-ups were done at one, two, four and 6 months intervals, and at one year. The primary outcome studied included fracture union and functional ambulatory status. Twenty-six patients were included in the study, 19 of whom were male with a mean age of 42.4 years. Fourteen patients (53.9% had sustained AO type 32B fractures, the majority in motor vehicle accidents. Twenty-two fractures (84.6% achieved union, while sixpatients (23.1% had complications such as broken plate, varus collapse, and broken screw. Four patients (15.4% underwent a second operation. At the end of the follow-ups, 25 patients (96.2% were community ambulators. We conclude that PF-LCP is an effective alternative treatment for subtrochanteric fractures when properly performed.

  2. EFFECTIVENESS OF LOCKING VERSUS DYNAMIC COMPRESSION PLATES FOR DIAPHYSEAL HUMERUS FRACTURES

    Directory of Open Access Journals (Sweden)

    Penugonda Ravi Shankar

    2015-02-01

    Full Text Available The aim of this study was to compare the effectiveness of locking compression plate (LCP over dynamic compression plate (DCP in the management of diaphyseal fractures of the humerus. 38 patients with diaphyseal fracture of the shaft of the humerus were randomized prospectively and treated by open reduction and internal fixation with LCP or DCP. 11 patients underwent internal fixation by LCP and 27 by DCP. Fixation was done through an anterolateral or posterior approach. The outcome was assessed in terms of the union time, union rate, functional outcome, ROM and the incidence of complications. Functional outcome was assessed using the Romen’s et al series grading system . On comparing the results by tests of significance like Chi - sqare test, there was no significant difference in Romen’s et al scores between the two groups ( P >0.05. Though the average union time and recovery of ROM was found to be better for LCP as compared to DCP, it is not statistically significant. Complications such as infection were found to be higher with DCP as compared to LCP. This study proves that LCP can be considered a better surgical option for the management of diaphyseal fractures of the humerus as it offers a short union time and lower incidence of serious complications like infection. However, there appears to be no difference between the two groups in terms of the rate of union and functional outcome

  3. Application of Minimally Invasive Treatment of Locking Compression Plate in SchatzkerⅠ~Ⅲ Tibial Plateau Fracture

    Institute of Scientific and Technical Information of China (English)

    Zhao Guohui

    2014-01-01

    Objective:To investigate the clinical effect of minimally invasive treatment of locking compression plate (LCP) in SchatzkerⅠ~Ⅲ tibial plateau fracture. Methods: Thirty-eight patients with SchatzkerⅠ~Ⅲtibial plateau fracture in our hospital were given minimally invasive treatment of LCP, and the artificial bone was transplanted to the depressed bone. Adverse responses, wound healing time and clinical efifcacy were observed. Results:All patients were followed-up for 14~20 months, and the mean duration was 16 months. Within 1 week after operation, 1 patient suffered from short-term rejection reaction to artiifcial bone, but he healed after corresponding measures were taken. There were no complications like skin necrosis and externally-exposed steel plate among the patients. In addition, all fractures were recovered, and the recovery time was 2.6~4.1 months, with the mean duration being 3.4 months. The recovery of knee function was favorable, in which 20 cases were excellent, 14 were good, and 4 were general. The excellent and good rate was 89.5%. Conclusion: Minimally invasive treatment of LCP for SchatzkerⅠ~Ⅲ tibial plateau fracture can reduce the postoperative relocation loss, and has small trauma and stable ifxation.

  4. Benefits and harms of locking plate osteosynthesis in intraarticular (OTA Type C) fractures of the proximal humerus

    DEFF Research Database (Denmark)

    Brorson, Stig; Rasmussen, Jeppe Vejlgaard; Frich, Lars Henrik

    2012-01-01

    INTRODUCTION: Locking plate osteosynthesis of proximal humeral fractures are widely recommended and used, even in complex intraarticular fracture patterns such as AO/OTA Type C fractures. We systematically reviewed clinical studies assessing the benefits and harms of osteosynthesis with angle...... stable plates in AO/OTA Type C fractures of the proximal humerus. METHODS: We conducted an iterative search in PubMed, Embase, Cochrane Library, Web of Science, Cinahl, and PEDro in all languages from 1999 to November 2010. Eligible studies should study the outcome for Type C fractures after primary...... osteosynthesis with locking plate within two weeks of injury, and a follow-up period of six months or more. Patients should be evaluated with the Constant-Murley Score (CS). Two observers extracted data independently. RESULTS: Twelve studies and 282 Type C fractures were included. Results were categorised...

  5. Plate osteosynthesis of fractures of the shaft of the humerus: comparison of limited contact dynamic compression plates and locking compression plates.

    Science.gov (United States)

    Singh, Ashutosh Kumar; Narsaria, Nidhi; Seth, R R; Garg, S

    2014-06-01

    The aim of this retrospective study was to compare outcomes and complications of displaced fractures of the shaft of the humerus treated with limited-contact dynamic compression plates (LCDCPs) and locking compression plates (LCPs). Two hundred and twelve patients with displaced fractures of the shaft of the humerus, treated with plate osteosynthesis from January 2005 to December 2009 were reviewed. One hundred and two patients (group A) were treated with LCDCP osteosynthesis and 110 patients (group B) were treated with LCP osteosynthesis. Clinical and radiological assessments were made at monthly intervals for the first 6 months and then at 2-month intervals for the next 6 months. Primary outcome measures like operative time, duration of hospital stay, time to fracture union, union rate and secondary outcome measures (functional outcome and complications such as infection, malunion, delayed union, nonunion, implant failure and iatrogenic radial nerve palsy) were compared between both groups. The ULCA scoring system and Mayo elbow performance index (MEPI) were used to assess shoulder and elbow functions, respectively. Rodriguez-Merchan criteria were used to assess the functional outcomes of the fracture fixation. There was no significant difference found between the two groups in terms of primary outcome measures. According to Rodriguez-Merchan criteria, comparison of functional outcomes of both groups showed insignificant difference (p = 0.48). There was no significant difference found between the two groups regarding mean ULCA score (p = 0.34) and mean MEPI sore (p = 0.54). In terms of complications, no significant difference was found between the two groups. This study concludes that the principle of fracture fixation was more important than plate selection in fractures of the shaft of the humerus. Level 3.

  6. Complex fractures of the proximal humerus in the elderly--outcome and complications after locking plate fixation.

    Science.gov (United States)

    Schliemann, B; Siemoneit, J; Theisen, Ch; Kösters, C; Weimann, A; Raschke, M J

    2012-05-01

    Open reduction and internal fixation (ORIF) with locking plates or primary arthroplasty remains a controversial issue in the management of complex proximal humerus fractures. Aim of this study was to evaluate the surgeon- and patient-based outcome of patients older than 65 years who underwent ORIF using locking plate fixation of a 3- or 4-part fracture of the proximal humerus. Twenty-seven patients older than 65 years were treated with locking plate fixation (PHILOS, Fa. Synthes, Umkirch, Germany). At an average follow-up of 44 months, the clinical and the subjective outcome were evaluated, and complications were analyzed. The mean age- and gender-related Constant score was 70% (30–100%) compared with 92% (47–108%) of the contralateral non-injured shoulder. The mean DASH score was 29 points (0–71). Five patients (18.5%) showed clinical signs of an impingement, which was related to malpositioning of the plate in 3 cases. Screw cutout was seen in 22.2% (6 patients). Avascular necrosis of the head or the tubercula was found in 8 patients (29.6%). The revision rate was 29.6%. However, the patients considered the functional status of their shoulder as “good” or “satisfactory.” The functional and patient-orientated results of the locking plate fixation of complex displaced proximal humerus fractures in the elderly are comparable to those of primary arthroplasty and minimally invasive treatment. Proper surgical technique (screw length, plate position) is mandatory for reducing the revision rate.

  7. Ex vivo biomechanical comparison of a 3.5 mm locking compression plate applied cranially and a 2.7 mm locking compression plate applied medially in a gap model of the distal aspect of the canine radius.

    Science.gov (United States)

    Uhl, Justin M; Kapatkin, Amy S; Garcia, Tanya C; Stover, Susan M

    2013-10-01

    To compare a medially applied 2.7 mm locking compression plate (LCP) to a cranially applied 3.5 mm LCP in a cadaveric distal radial fracture gap model. In vitro mechanical testing of paired cadaveric limbs Paired radii (n = 8) stabilized with either a 2.7 mm LCP medially or a 3.5 mm LCP cranially. Simulated distal radial comminuted fractures were created and stabilized with an LCP plate on the cranial surface in 1 limb, and on the medial surface in the contralateral limb. Gap stiffness, gap strain, and failure properties were compared between cranial and medial plate positions. Limb constructs were axially loaded, cyclically through 4 conditions that allowed mediolateral or craniocaudal bending at walk and trot loads, before monotonic failure loading. The effects of plate position on mechanical variables were assessed using paired t-tests. Gap stiffness was greater for cranial plate constructs than medial plate constructs for axial loading with mediolateral bending, but lower with craniocaudal bending. However, in loading that facilitated craniocaudal bending the medial plate construct also had bending apparent in the mediolateral direction. Gap strains for the different conditions followed similar trends as stiffness. Cranial plate constructs had significantly higher monotonic stiffness, yield, and failure loads. The larger, cranially applied LCP was biomechanically superior to the smaller, medially applied LCP in our distal radial fracture gap model, however the medial plate was superior to the cranial plate in cyclic loading allowing craniocaudal bending. © Copyright 2013 by The American College of Veterinary Surgeons.

  8. Numerical analysis on thermal hydraulic performance of a flat plate heat pipe with wick column

    Science.gov (United States)

    Lu, Longsheng; Liao, Huosheng; Liu, Xiaokang; Tang, Yong

    2015-08-01

    A simplified thermal hydraulic model is developed to investigate the influence of wick column on the performance of a flat plate heat pipe (FPHP). The governing equations of the FPHP are solved by using the computational fluid dynamics package FLUENT. The temperature, velocity and pressure fields are obtained. The validity of the model is confirmed by comparing the present solutions with the open literature data. The numerical results show that with the increase of the wick column size, the maximum velocity of the liquid and vapor decreases while the total thermal resistance and capillary heat transfer limit of the FPHP increases gradually. The performance of the FPHP may degrade if the wick column is placed inside the vapor core asymmetrically.

  9. Comparison of limited-contact dynamic compression plate and locking compression plate constructs for proximal interphalangeal joint arthrodesis in the horse

    OpenAIRE

    Rocconi, Richard A.; Carmalt, James L.; Sampson, Sarah N.; Elder, Steve H.; Gilbert, Eric E.

    2015-01-01

    This study compared in vitro monotonic and cyclic mechanical properties of equine proximal interphalangeal joint arthrodeses stabilized using an open or closed technique combined with axial 4.5 mm narrow limited-contact dynamic compression plate (LC-DCP) or 4.5 mm narrow locking compression plate (LCP). Ten forelimb pairs were randomly assigned to LCP or LC-DCP groups. One limb in each pair was assigned to either open or closed technique. Limbs were tested for cyclic fatigue at 20 000 cycles ...

  10. Analysis and seismic tests of composite shear walls with CFST columns and steel plate deep beams

    Science.gov (United States)

    Dong, Hongying; Cao, Wanlin; Wu, Haipeng; Zhang, Jianwei; Xu, Fangfang

    2013-12-01

    A composite shear wall concept based on concrete filled steel tube (CFST) columns and steel plate (SP) deep beams is proposed and examined in this study. The new wall is composed of three different energy dissipation elements: CFST columns; SP deep beams; and reinforced concrete (RC) strips. The RC strips are intended to allow the core structural elements — the CFST columns and SP deep beams — to work as a single structure to consume energy. Six specimens of different configurations were tested under cyclic loading. The resulting data are analyzed herein. In addition, numerical simulations of the stress and damage processes for each specimen were carried out, and simulations were completed for a range of location and span-height ratio variations for the SP beams. The simulations show good agreement with the test results. The core structure exhibits a ductile yielding mechanism characteristic of strong column-weak beam structures, hysteretic curves are plump and the composite shear wall exhibits several seismic defense lines. The deformation of the shear wall specimens with encased CFST column and SP deep beam design appears to be closer to that of entire shear walls. Establishing optimal design parameters for the configuration of SP deep beams is pivotal to the best seismic behavior of the wall. The new composite shear wall is therefore suitable for use in the seismic design of building structures.

  11. The Clinical and Economic Impact of Generic Locking Plate Utilization at a Level II Trauma Center.

    Science.gov (United States)

    Mcphillamy, Austin; Gurnea, Taylor P; Moody, Alastair E; Kurnik, Christopher G; Lu, Minggen

    2016-12-01

    In today's climate of cost containment and fiscal responsibility, generic implant alternatives represent an interesting area of untapped resources. As patents have expired on many commonly used trauma implants, generic alternatives have recently become available from a variety of sources. The purpose of this study was to examine the clinical and economic impact of a cost containment program using high quality, generic orthopaedic locking plates. The implants available for study were anatomically precontoured plates for the clavicle, proximal humerus, distal radius, proximal tibia, distal tibia, and distal fibula. Retrospective review. Level II Trauma center. 828 adult patients with operatively managed clavicle, proximal humerus, distal radius, proximal tibia, tibial pilon, and ankle fractures. Operative treatment with conventional or generic implants. The 414 patients treated with generic implants were compared with 414 patients treated with conventional implants. There were no significant differences in age, sex, presence of diabetes, smoking history or fracture type between the generic and conventional groups. No difference in operative time, estimated blood loss or intraoperative complication rate was observed. No increase in postoperative infection rate, hardware failure, hardware loosening, malunion, nonunion or need for hardware removal was noted. Overall, our hospital realized a 56% reduction in implant costs, an average savings of $1197 per case, and a total savings of $458,080 for the study period. Use of generic orthopaedic implants has been successful at our institution, providing equivalent clinical outcomes while significantly reducing implant expenditures. Based on our data, the use of generic implants has the potential to markedly reduce operative costs as long as quality products are used. Therapeutic Level III.

  12. Quantification of defects depth in glass fiber reinforced plastic plate by infrared lock-in thermography

    Energy Technology Data Exchange (ETDEWEB)

    Ranjit, Shrestha; Kim, Won Tae [Kongju National University, Cheonan (Korea, Republic of); Choi, Man Yong [Korea Research Institute of Standards and Science, Daejeon (Korea, Republic of)

    2016-03-15

    The increasing use of composite materials in various industries has evidenced the need for development of more effective nondestructive evaluation methodologies in order to reduce rejected parts and to optimize production cost. Infrared thermography is a noncontact, fast and reliable non-destructive evaluation technique that has received vast and growing attention for diagnostic and monitoring in the recent years. This paper describes the quantitative analysis of artificial defects in Glass fiber reinforced plastic plate by using Lockin infrared thermography. The experimental analysis was performed at several excitation frequencies to investigate the sample ranging from 2.946 Hz down to 0.019 Hz and the effects of each excitation frequency on defect detachability. The four point method was used in post processing of every pixel of thermal images using the MATLAB programming language. The relationship between the phase contrast with defects depth and area was examined. Finally, phase contrast method was used to calculate the defects depth considering the thermal diffusivity of the material being inspected and the excitation frequency for which the defect becomes visible. The obtained results demonstrated the effectiveness of Lock-in infrared thermography as a powerful measurement technique for the inspection of Glass fiber reinforced plastic structures.

  13. Surgical outcome of proximal femoral fractures using proximal femoral - locking compression plate

    Directory of Open Access Journals (Sweden)

    Prakash A. Sasnur

    2015-07-01

    Full Text Available Introduction: Proximal femoral fractures are complex fractures following devastating injuries in young and elderly population. Despite marked improvement in implant design, surgical technique and patient care these fractures are associated with high incidence of implant failure, refracture and varus collapse. Intramedullary nails are technically demanding and associated with high re-operation rates. The study was done to evaluate the outcome of proximal femoral fractures treated with proximal femur locking compression plate (PF-LCP. Methods: This study is conducted at Al Ameen Medical College and Hospital, Bijapur during the period Jan 2012 to March 2014.Pertrochanteric fractures especially unstable intertrochanteric & subtrochanteric fractures were included. Technical difficulties with the implant and operating time were quantified. Union of fracture site and implant related complications were followed up clinically and radiological. The Harris Hip Score was used to evaluate the functional outcome. Results: Thirty-two patients were available for final evaluation with average age of 55.4 years. The average operation time was 1 hour and 35 minutes with mean blood loss of 180ml. Union was achieved in all the cases with an average time of 17 weeks. Complications included one case of delayed union and three cases of varus collapse. Conclusion: PF-LCP achieves anatomical reduction and stable fixation with higher union rate and fewer complications.

  14. Minimally invasive proximal interphalangeal joint arthrodesis using a locking compression plate and tissue engineering in horses: A pilot study

    OpenAIRE

    SEO, Jong-Pil; Yamaga, Takashi; TSUZUKI, Nao; YAMADA, Kazutaka; HANEDA, Shingo; Furuoka, Hidefumi; Tabata, Yasuhiko; SASAKI, Naoki

    2014-01-01

    This pilot study assessed the efficacy of 2 minimally invasive techniques for proximal interphalangeal (PIP) joint arthrodesis in horses. The PIP joints of both forelimbs (n = 6) were stabilized with locking compression plates (LCP) using a minimally invasive technique (LCP technique). Subsequently, for 1 randomly selected PIP joint of each horse, surgical drilling (SurD) was performed and tissue engineering (TE) was applied (LCP/SurD/TE technique). Minimally invasive PIP joint arthrodesis wi...

  15. Posterior acetabular column and quadrilateral plate fractures: fixation with tension band principles.

    Science.gov (United States)

    Aly, Tarek A; Hamed, Hany

    2013-07-01

    Acetabular fractures can be classified into 5 simple and 5 associated fracture patterns. A significant amount of variation and complexity exists in these fractures patterns. Fractures of the posterior wall are the most common acetabular fractures. Comminution of the quadrilateral plate adds to fracture instability, and more rigid and stable internal fixation is mandatory. The goal of this study was to assess the results of reconstruction of comminuted posterior wall fractures of the acetabulum associated with quadrilateral plate fractures using the tension band technique. Twelve patients (9 men and 3 women) were included in the study. Mean patient age was 38.6 years (range, 24-47 years). Minimum follow-up was more than 2 years postoperatively. Reconstruction of the fracture included anatomic reduction of the fracture and fixation with a buttress plate for the posterior column and a prebent one-third tubular plate for the quadrilateral plate fracture. Clinical results were excellent in 58% of patients and good in 17% of patients. Radiologic results were excellent in 50% of patients and good in 17% of patients. Radiologically, based on the fracture gap postoperatively, 8 (66%) patients showed anatomic reduction, 2 (17%) showed good reduction, and 2 (17%) showed poor reduction. The study confirms that this method of reconstruction facilitates accurate and firm reduction of displaced posterior wall fractures of the acetabulum.

  16. Drop size in a liquid pulsed sieve-plate extraction column

    Directory of Open Access Journals (Sweden)

    M. R. Usman

    2009-12-01

    Full Text Available The (Benzoic acid + kerosene + water system was studied in a 5.0 cm diameter liquid pulsed liquid-liquid extraction column with a total number of 80 sieve plates. The effect of pulsation intensity, dispersed phase superficial velocity, and continuous phase superficial velocity on volume-surface mean diameter was studied. Generally, the mean drop diameter decreased more rapidly with the increase of pulsation intensities and superficial velocities at low pulsation intensities and superficial velocities. However, the effect was not found to be significant at higher pulsation intensities and higher superficial velocities. In the interpretation of the experimental results, the drop size was observed to be a function of the operating regimes (mixer-settler, dispersion, and emulsion of the pulsed sieve-plate extraction column. The experimental mean drop diameters were compared to the most acceptable analytical drop size correlation developed by Kumar and Hartland (1986. The correlation proved to be in good agreement for the column operating in the dispersion regime.

  17. Radiation-Associated Fracture Nonunion of the Clavicle Treated with Locking Plate Fixation and Autologous Bone Grafting

    Directory of Open Access Journals (Sweden)

    Takahiro Niikura

    2012-01-01

    Full Text Available We describe a case of radiation-associated fracture nonunion of the clavicle, which was treated by locking plate fixation and autologous bone grafting. The patient was a 67-year old man who received 70 Gy radiation therapy to treat nasopharyngeal carcinoma. Eight years later, he suffered a pathological fracture of the right clavicle. One year after the fracture, surgical treatment was performed due to persistent pain and weakness. Radiographs demonstrated atrophic nonunion. Bone scan demonstrated hot uptake at both ends of the fractured bone. MRI demonstrated a formation of pseudoarthrosis with fluid collection and suggested bone marrow edema at both ends of the fracture fragments. In surgery, fibrous pseudoarthrosis tissue was excised and both ends of the fracture fragments were refreshed to identify bleeding. Open reduction and internal fixation using a 7-hole locking plate and autologous bone grafting were performed. Successful bony union was obtained 1 year postoperatively, and no adverse events were observed up to 52 months after the operation. Our case suggests that a locking plate provides sufficient fixation and autologous bone grafting is effective in enhancing bone healing in a radiation-associated fracture nonunion of the clavicle in which it is difficult to achieve bony union.

  18. Liquid-phase mass transfer in a downward-coflow plate column

    Energy Technology Data Exchange (ETDEWEB)

    Utkin, V.A.; Chekhov, O.S.; Stepanov, A.M.

    1986-06-01

    The authors investigate mass exchange as a function of the hydraulic parameters of plate columns with downward direct flow. A schematic representation of the installation employed for the study is shown. It consists of six separate sections each 100 mm long and 99 mm i.d. The number of plates was varied in the tests from 1 to 5 without changing the working volume of the column. Liquid test samples were taken during the tests at the inlet to the apparatus over definite time intervals. The sodium sulfite concentration in the solution was determined iodometrically. Typical curves are shown of the change in the sulfite concentration with time for different hydrodynamic programs. The functional relationship between the mass-output coefficient and the hydraulic parameters was determined in terms of the specific energy dissipation of the gas-liquid stream on the plate. An equation was used to process the experimental data statistically. The results of statistical treatment of the test data is shown.

  19. Study of the gas content in two-phase downflow in a sieve-plate column

    Energy Technology Data Exchange (ETDEWEB)

    Utkin, V.A.; Chekhov, O.S.; Stepanov, A.M.

    1986-04-10

    This paper presents a thorough study of the gas content in two-phase downflow in a column sectioned by sieve plates. The air-water system was used in the experiments and the mass flow rates of the gas and liquid in the column were varied in the ranges of 0.5-10 and 200-900 kg m/sup -2/.sec/sup -1/, respectively. The gas content of the stream was determined by gamma radioscopy. A scintilalation counter was used as the gamma-radiation detector. Determination of the gas content over the height of the apparatus showed that the flow structure is formed immediately after the first plate and then remains constant. The influence of the viscosity of the liquid on the gas content of the stream was studied with the use of plates of 40.5% open cross section. Statistical analysis of the experimental data revealed the existence of two patterns of two-phase flow in the apparatus.

  20. Axial dispersion of the liquid phase in a three-phase Karr reciprocating plate column

    Directory of Open Access Journals (Sweden)

    DEJAN U. SKALA

    2004-07-01

    Full Text Available The influence of the gas flow rate and vibration intensity in the presence of the solid phase (polypropylene spheres on axial mixing of the liquid phase in a three phase (gas-liquid-solid Karr reciprocating plate column (RPC was investigated. Assuming that the dispersion model of liquid flow could be used for the real situation inside the column, the dispersion coefficient of the liquid phase was determined as a function of different operating parameters. For a two-phase liquid-solid RPC the following correlation was derived: DL = 1.26(Af1.42 UL0.51 eS0.23 and a similar equation could be applied with ± 30 % confidence for the calculation of axial dispersion in the case of a three-phase RPC: DL = 1.30(Af0.47 UL0.42 UG0.03eS-0.23.

  1. FUNCTIONAL OUTCOME OF SUPRACONDYLAR FRACTURES OF FEMUR MANAGED BY OPEN REDUCTION AND INTERNAL FIXATION WITH LOCKING COMPRESSION PLATE

    Directory of Open Access Journals (Sweden)

    Madhusudhana

    2015-10-01

    Full Text Available INTRODUCTION : Incidence of distal femur fractures is approximately 37 per 1 , 00,000 person - years.¹Distal femoral fractures has two different injury mechanisms, high energy trauma and low energy trauma. In high - energy trauma, the problem of restoring the function in a destroyed knee joint persists. Complex knee ligament injuries frequently occur additionally to extensive cartilage injuries. In elderly patients, extreme osteoporosis represents a particular problem for anchoring the implant. 2 Supracondylar and inter condylar fractures often are unstable and comminuted and tend to occur in the elderly or those with multiple injuries. Treatment options are many with varied results. The final outcome would depend upon the type of fracture, stabilization of fixation and and perhaps patient general condition. 3 The options for operative treatment are traditional plating techniques that require compression of the implant to the femoral shaft (blade plate, Dynamic Condylar Screw, non - locking condylar buttress plate, antegrade nailing fixation, retrograde nailing, sub muscular locked internal fixation and external fixation. 4 However, as the complexity of fractures needing treatment has changed from simple extra - articular supra - condylar types to inter - condylar and metaphyseal comminuted types, these implants may not be ideal. Double plating, and more recently, locked plating techniques have been advocated 5 . However with double plating there is often extensive soft tissue stripping on both sides of the femur, resulting in reduced blood supply and potential non - union and failure of the implants 6 . The LCP is a single beam construct where the strength of its fixation is equal to the sum of all screw - bone interfaces rather than a single screw’s axial stiffness or pullout resistance as seen in unlocked plates 7,8 . Its unique biomechanical function is based on splinting rather than compression resulting in flexible stabilization

  2. Comparison of limited-contact dynamic compression plate and locking compression plate constructs for proximal interphalangeal joint arthrodesis in the horse.

    Science.gov (United States)

    Rocconi, Richard A; Carmalt, James L; Sampson, Sarah N; Elder, Steve H; Gilbert, Eric E

    2015-06-01

    This study compared in vitro monotonic and cyclic mechanical properties of equine proximal interphalangeal joint arthrodeses stabilized using an open or closed technique combined with axial 4.5 mm narrow limited-contact dynamic compression plate (LC-DCP) or 4.5 mm narrow locking compression plate (LCP). Ten forelimb pairs were randomly assigned to LCP or LC-DCP groups. One limb in each pair was assigned to either open or closed technique. Limbs were tested for cyclic fatigue at 20 000 cycles and then single-cycle to failure under 3-point dorsopalmar bending. There was no significant difference in stiffness of constructs during cyclic fatigue testing or on force or stiffness at failure in single cycle to failure testing between open and closed techniques or between plate types. Both implants, surgical technique, or combinations thereof are suitable for clinical use. More work is necessary to define the interaction between implant type and surgical technique.

  3. Study of proximal femoral locking compression plate in extra capsular fracture neck of femur

    Directory of Open Access Journals (Sweden)

    Ravi G.O.

    2015-12-01

    Results: In our study of 21 cases, cases 13 cases were intertrochanteric fracture and remaining 8 were subtrochanteric fracture with the mean age was 51.47 years. Minimum age was 19 years and maximum age was 85 years. 14 patients (67% were males and 7 patients (33% were females, 13 IX patients (62% had right-sided fracture and 8 patients (38% had left-sided fracture. with right side being more common side affected. The average duration of stay in the hospital was 25.31 days. The average follow up was 18 months [11 to 23 months]. Out of 21 patients in our study 16 patients (76% are able to sit cross-legged and can squat on ground without any problem. The functional results were graded according to Harris Hip Scoring, In our study, 10 patients (48%had excellent results, 8 patients (38%had good results, 2 patients (10%had poor result, and 1 failed case (5% as she is an elderly female of 85 years with limited activity both preoperatively due to physiological age and general weakness. Conclusions: In conclusion the potentiality of the Proximal Femoral Locking Compression Plate (PF-LCP in varied indications, shows its versatility. Although not free of complications our study has demonstrated excellent results. The procedure offers, faster mobilization, rapid return to activities of daily living, improves the quality of life and gave a long term solution in patients with extracapsular fracture neck of femur. Larger studies with longer follow up will further validate the procedure. [Int J Res Med Sci 2015; 3(12.000: 3726-3733

  4. Study on the Holdup and Mass Transfer Performances for Gas-Liquid-Liquid System in a Screen Plate Column

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The gas and dispersed phase holdups and mass transfer coefficients of liquid-iquid were determined for gas-liquid-liquid three phase system in a screen plate column. The flow pattern of gas-liquid-liquid three phase system was studied under different gas velocities. The shape factors showed the geometric properties of screen plates and the corrected drop characteristic velocities were introduced. The phase holdup in two phases was correlated. The research results indicated that mass transfer coefficient for liquid-liquid system in a column with screen plates and gas agitation was found to increase apparently.

  5. OSTEOSYNTHESIS OF PROXIMAL HUMERAL END FRACTURES WITH FIXED-ANGLE PLATE AND LOCKING SCREWS: TECHNIQUE AND RESULTS

    Science.gov (United States)

    Cohen, Marcio; Amaral, Marcus Vinicius; Monteiro, Martim; Brandão, Bruno Lobo; Motta Filho, Geraldo Rocha

    2015-01-01

    Describe the results of proximal humeral fractures surgically treated with the Philos locking plate system. Method: Between March 2003 and October 2004 we prospectively reviewed 24 of 26 patients with proximal humerus fractures treated with a Philos plate. The mean follow-up time was 12 months and the mean age of patients was 57 years. Six patients had four-part proximal humerus fractures, 11 patients had three-part proximal humerus fractures, and nine patients had two-part proximal humerus fractures. Clinical evaluation was performed using the University of California at Los Angeles (UCLA) criteria. Results: The mean UCLA score was 30 points (17-34). All fractures showed union. Three patients showed fracture union at varus position. The mean UCLA score for these patients was 27 points. Conclusion: Osteosynthesis with Philos plate provides a stable fixation method with good functional outcome. PMID:26998460

  6. The Use of the String of Pearls Locking Plate System in the Stabilisation of a Comminuted Calcaneal Fracture in a Giant Breed Dog

    Directory of Open Access Journals (Sweden)

    A. B. Scrimgeour

    2011-01-01

    Full Text Available An eight-year-old male Pyrenean mountain dog was presented with a comminuted fracture of the right calcaneus following motor vehicle trauma. The fracture was stabilised with a plate-rod construct, using the String of Pearls locking plate system and an intramedullary pin. Healing was uncomplicated.

  7. Distraction osteogenesis using combined locking plate and Ilizarov fixator in the treatment of bone defect: A report of 2 cases

    Directory of Open Access Journals (Sweden)

    John Mukhopadhaya

    2017-01-01

    Full Text Available Distraction osteogenesis and bone transport has been used to reconstruct bone loss defect by allowing new bone to form in the gap. Plate-guided bone transport has been successfully described in literature to treat bone loss defect in the femur, tibia, and mandible. This study reports two cases of fracture of femur with segmental bone loss treated with locking plate fixation and bone transport with Ilizarov ring fixator. At the time of docking, when the transport segment is compressed with bone fragment, the bone fragment is fixed with additional locking or nonlocking screws through the plate. The bone defect size was 7 cm in case 1 and 8 cm in case 2 and the external fixation indexes were 12.7 days/cm and 14 days/cm. No shortening was present in either of our cases. The average radiographic consolidation index was 37 days/cm. Both cases achieved infection-free bone segment regeneration and satisfactorily functional outcome. This technique reduces the duration of external fixation during the consolidation phase, allows correction of length and alignment and provides earlier rehabilitation.

  8. EARLY RESULTS OF UNSTABLE DISTAL RADIUS FRACTURES- ORIF WITH LOCKING COMPRESSION PLATE VERSUS LIGAMENTOTAXIS WITH EXTERNAL FIXATORS

    Directory of Open Access Journals (Sweden)

    Mondeep Gayan

    2017-04-01

    Full Text Available BACKGROUND External Fixation (EF and Open Reduction and Internal Fixation (ORIF have been the traditional surgical modalities for unstable distal radius fractures. The Locking Compression Plates (LCP acting as “internal external fixators” are particularly valuable in difficult situations of fractures. We undertook a study to evaluate the outcome of unstable distal radius fractures treated with ORIF with LCP versus those treated by ligamentotaxis with external fixators. MATERIALS AND METHODS A comparative study was carried out in a tertiary care centre with 30 cases of unstable distal radius fractures (15 cases in each group. In one group, open reduction and internal fixation with distal radius volar locking compression plate was carried out and in the other group ligamentotaxis with external fixator was done. The patients were treated and followed up over a period of one and a half year between June 2011 to November 2012. The fractures were classified according to AO classification (Arbeitsgemeinschaft für Osteosynthesefragen: German for “Association for the Study of Internal Fixation” or AO. The functional results were evaluated at the end of 6 months according to Demerit point system of Gartland and Werley modified by Sarmiento (1975 and the anatomical results as per Lindstrom criteria (1959 modified by Sarmiento (1980. RESULTS Overall 86.66% (13 cases had good-to-excellent anatomical results in external fixator group as compared to 93.33% (14 cases in LCP group. The functional outcome was excellent in 80% (12 and good in 13.33% (2 cases in external fixator group as compared to 66.66% (10 excellent and 26.66% (4 good in LCP group. CONCLUSION Both open reduction and internal fixation with locking compression plate and ligamentotaxis with external fixators are good treatment modalities for unstable distal radius fractures. However, the choice should be guided by the fracture configuration, surgeons’ experience and patient’s profile.

  9. Mechanical assessment of local bone quality to predict failure of locked plating in a proximal humerus fracture model.

    Science.gov (United States)

    Röderer, Götz; Brianza, Stefano; Schiuma, Damiano; Schwyn, Ronald; Scola, Alexander; Gueorguiev, Boyko; Gebhard, Florian; Tami, Andrea

    2013-09-01

    The importance of osteoporosis in proximal humerus fractures is well recognized. However, the local distribution of bone quality in the humeral head may also have a significant effect because it remains unclear in what quality of bone screws of standard implants purchase. The goal of this study was to investigate whether the failure of proximal humerus locked plating can be predicted by the DensiProbe (ARI, Davos, Switzerland). A 2-part fracture with metaphyseal impaction was simulated in 12 fresh-frozen human cadaveric humeri. Using the DensiProbe, local bone quality was determined in the humeral head in the course of 6 proximal screws of a standard locking plate (Philos; Synthes GmbH, Solothurn, Switzerland). Cyclic mechanical testing with increasing axial loading until failure was performed. Bone mineral density (BMD) significantly correlated with cycles until failure. Head migration significantly increased between 1000 and 2000 loading cycles and significantly correlated with BMD after 3000 cycles. DensiProbe peak torque in all screw positions and their respective mean torque correlated significantly with the BMD values. In 3 positions, the peak torque significantly correlated with cycles to failure; here BMD significantly influenced mechanical stability. The validity of the DensiProbe was proven by the correlation between its peak torque measurements and BMD. The correlation between the peak torque and cycles to failure revealed the potential of the DensiProbe to predict the failure of locked plating in vitro. This method provides information about local bone quality, potentially making it suitable for intraoperative use by allowing the surgeon to take measures to improve stability.

  10. Application of anterior decompression and reconstruction using titanium mesh with locking plates in the management of cervical spondylotic myelopathy

    Institute of Scientific and Technical Information of China (English)

    Maolin He; Zengming Xiao; Shide Li; Qianfen Chen

    2008-01-01

    Objective:To observe the clinical effect of anterior decompression and reconstruction using titanium mesh with locking plates in the treatment of cervical spondylotic myelopathy.Methods:One hundred and twenty patients with cervical spondylotic myelopathy were treated by anterior decompression and reconstruction using titanium mesh with locking plates.There were 66 men and 54 women ranges in age from 37 to 72 Years(mean age, 58.3 years).The mean Japanese orthopedic surgery association(JOA) scale was 9.6 points before operation.Patients were followed up clinically and radiographically.Results:Having stood surgery well, the operation time ranged between 60-100 min and bleeding during operation ranged between 20-200 ml.There were no case of postoperative infection, recurrent laryngeal nerve palsy, or esophageal or tracheal laceration or rupture.The average follow-up period was 14.3 months(range, 12 to 24 months) in 96 who were followed up.At the last follow-up visit the mean JOA scale had improved to 14.4 points, reflecting an improve ment of 4.8 points.The results were considered to be excellent in 87 patients, good in 25, fair in 6, and poor in 2.No hardware-related complications or adjacent segment degenerative changes were encountered during the follow-up periods.Stable bone union was observed in all cases and the average time required for fusion was 5.7 months.Conclusion:Titanium mesh filled with autologous bone graft can avoid the complications associated with harvesting bone from the iliac crest donor site.When combined with cervical anterior locking plate, it can obtain satisfatory clinical results for the treatment of cervical spondylotic myelopathy.

  11. Proximal humeral fractures: a biomechanical comparison of locking plate constructs in a cadaveric 3-part fracture model.

    Science.gov (United States)

    Rose, David M; Sutter, Edward G; Mears, Simon C; Gupta, Rohit R; Belkoff, Stephen M

    2010-11-01

    The purpose of our study was to biomechanically compare, under cyclic loading conditions, fracture site motion, humeral head collapse, and intra-articular hardware penetration in simulated 3-part osteoporotic proximal humeral fractures stabilized with 1 of 2 locking-plate constructs. We performed fixation on simulated 3-part proximal humeral fractures in 10 pairs of cadaveric osteoporotic humeri with a Hand Innovations S3 Proximal Humerus Plate (S3 plate) or an LCP Proximal Humerus Plate (LCP plate; 1 each for each pair). The specimens were potted, mounted on a materials testing machine, and subjected to 5000 cycles of abduction in the scapular plane, loading through the supraspinatus tendon. Interfragmentary displacement at 2 virtual points (the most medial aspect of the calcar and the most superior aspect of the osteotomy line between the greater tuberosity and humeral head) was measured using an optical tracking system. Humeral head rotation was also measured. We used a generalized linear latent and mixed model to check for an effect of cyclic loading and treatment on the parameters of interest (significance, P fracture site motion, it is unknown whether the magnitude of the motion is clinically significant.

  12. Clinical results of using the proximal humeral internal locking system plate for internal fixation of displaced proximal humeral fractures.

    Science.gov (United States)

    Norouzi, Masoud; Naderi, Mohammad Nasir; Komasi, Mehdi Hemmati; Sharifzadeh, Seyyed Reza; Shahrezaei, Mostafa; Eajazi, Alireza

    2012-05-01

    Proximal humerus fractures are accounting for 4-5% of all fractures with increasing incidence. Proximal Humeral Internal Locking System (PHILOS) plate is a new plate which permits early mobility and lowers the risk of complications. The aim of this study was to evaluate the functional outcome and the complication rate after using this plate. Between 2006-2008, 37 patients with displaced 2-, 3-, and 4-part fractures of the proximal humerus underwent surgery using PHILOS plate. The mean range of follow-up was 12 months. Twenty patients were aged 60 years and younger, and 17 were aged older than 60 years. The average American Shoulder and Elbow Surgeons (ASES) score at the final follow-up was 77.62. According to Michener and colleagues classification, 5.4% of patients had an excellent outcome, 72.9% were minimally functionally limited, 16.2% were moderately functionally limited, and 5.4% were maximally functionally limited. The average ASES score between patients 60 years and older and those 60 years and younger was not different significantly. One patient developed avascular necrosis of the humeral head, 2 patients developed an infection, and no patients developed a nonunion. Fixation with PHILOS plate can be considered a good method with high union rates for this kind of fracture, especially in the older population with osteoporotic bone.

  13. Extraarticular proximal tibial fractures repaired with multifunctional locking intramedullary nail and locking plate Extraarticular proximal tibial fractures repaired with multifunctional locking intramedullary nail and locking plate%多功能带锁髓内钉和钢板置入内固定修复关节外胫骨创伤性骨折

    Institute of Scientific and Technical Information of China (English)

    陈德明; 徐晓阳; 王蔚; 张力; 常乐

    2016-01-01

    BACKGROUND: Many researchers at home and abroad think that interlocking intramedul ary nails may be more suitable for comminuted fractures of the tibia with severe soft tissue injury. Plate fixation is more advantageous for distal tibial fractures. OBJECTIVE: To compare the effects of multifunctional locking intramedul ary nail and locking plate in treatment of extraarticular proximal tibial fractures. METHODS: 156 patients with extraarticular proximal tibial fractures were included and divided into intramedul ary nail group (n=78) and the locking plate group (n=78) according to repair method. Curative effects and healing time were compared between the two groups. At 3 months after treatment, Johner-Wruh tibial fracture scores were used to assess the repair effect in both groups. In addition, operation time, blood loss, healing time and complications were compared between the two groups.RESULTS AND CONCLUSION: Mean healing time was 9.3 months in the locking plate group and 9.2 months in the intramedul ary nail group. At 3 months after treatment, the repair effect was significantly better in the intramedul ary nail group than in the locking plate group (P < 0.05). Blood loss and time were less in the intramedul ary nail group than in the locking plate group (P < 0.05), and surgical difficulty was high. At 3 months after treatment, the incidence rates of tibia eversion/inversion, neurovascular injury and nonunion/infection were significantly lower in the intramedul ary nail group than in the locking plate group (P < 0.05). These findings confirmed that the multifunctional locking intramedul ary nailing for extraarticular proximal tibial fractures obtained reliable efficacy, exact effect, reduced blood loss and low incidence of complications. Thus, it is better than locking plate.%背景:国内外多数学者认为带锁髓内钉可能更适合于粉碎性且软组织损伤严重的胫骨骨折,而钢板内固定则对于胫骨远端骨折更有优势。目的:

  14. EVALUATION OF FUNCTIONAL OUTCOME AFTER OPEN REDUCTION AND INTERNAL FIXATION OF DISTAL FEMUR FRACTURES BY LOCKING COMPRESSION PLATE

    Directory of Open Access Journals (Sweden)

    L. Lokanadha Rao

    2016-09-01

    Full Text Available BACKGROUND In the supra and intercondylar fractures of femur particularly with intra articular extension, patient may develop stiffness of knee, shortening, rotational deformities, internal derangement of knee with instability, varus and valgus deformities which affect patient’s routine lifestyle. If these cases were treated with locking compression plate, the results obtained were successful, superior, timesaving providing early ambulation and least disability improving the functional outcome. MATERIALS AND METHODS This is a prospective interventional study. This study includes 25 supracondylar and intercondylar fractures of femur (both Muller’s Type ‘A’, Type B and Type ‘C’ fractures treated with open reduction and internal fixation by Locking Compression Plate in the Department of Orthopaedics, King George Hospital, Visakhapatnam from September 2013 to September 2015. There are 16 males and 9 females with age ranging from 20 to 80 years with an average of 44.6 years. Average age for males is 28.9 years and average age for females is 25 years. 18 fractures were due to road traffic accidents and 6 cases are due to fall from significant heights, 1 case due to simple fall from standing (osteoporosis. 15 cases were in right femur (60% and 10 cases were in left femur (40%. RESULTS 25 cases were included in the study. There is an increase in the rate of union, decreased time taken for union, increased knee range of motion, decreased time for weight-bearing, postoperative complications and duration for hospital stay. CONCLUSION LCP proved to be a good implant which could take the challenges like poor bone stock, severe comminution both metaphyseal and articular and prove successful. The locking head screws distally have prevented varus collapse, even in cases of osteoporosis. The Condylar LCP can be used in either an open or a minimally invasive manner.

  15. Compartment syndrome like picture in metaphyseal comminuted fracture of tibia treated by locking plate due to tight closure

    Directory of Open Access Journals (Sweden)

    Prafulla Herode

    2013-01-01

    Full Text Available A 22-year-old male came to casualty on 5 th May 2012 after a fall from motorcycle. He complained of excruciating pain and swelling over right knee. There was an open wound of 7 × 2 cm over supra-patellar region and diffuse swelling over knee joint with severe tenderness over proximal aspect of right tibia. X-ray showed intra-articular fracture of proximal tibia extending to diaphysis classified as type 6 by Schatzker classification for proximal tibia, with fibula shaft transverse fracture. The skin over the fracture was contused. Debridement with primary wound closure was done in emergency. Skeletal traction was applied through a lower tibial Steinman pin. Patient was operated after 15 days when wound healed and swelling subsided. Locking plate was applied on medial aspect using Minimally invasive percutaneous plate osteosysthesis (MIPPO technique. Post-operatively over 4 hours patient developed severe pain and swelling in operated leg which mimicked compartment syndrome. Suture removal was done immediately in the ward from the distal aspect, which relieved the symptoms but lead to exposure of the plate. A rotational flap was done to cover the plate in coordination with a plastic surgeon on the next day.

  16. Metaphyseal locking plate as a definitive external fixator for treating open tibial fractures--clinical outcome and a finite element study.

    Science.gov (United States)

    Ma, Ching-Hou; Wu, Chin-Hsien; Tu, Yuan-Kun; Lin, Ting-Sheng

    2013-08-01

    We evaluated both the outcome of using a locking plate as a definitive external fixator for treating open tibial fractures and, using finite element analysis, the biomechanical performance of external and internal metaphyseal locked plates in treating proximal tibial fractures. Eight open tibial patients were treated using a metaphyseal locked plate as a low-profile definitive external fixator. Then, finite element models of internal (IPF) as well as two different external plate fixations (EPFs) for proximal tibial fractures were reconstructed. The offset distances from the bone surface to the EPFs were 6 cm and 10 cm. Both axial stiffness and angular stiffness were calculated to evaluate the biomechanical performance of these three models. The mean follow-up period was 31 months (range, 18-43 months). All the fractures united and the mean bone healing time was 37.5 weeks (range, 20-52 weeks). All patients had excellent or good functional results and were walking freely at the final follow-up. The finite element finding revealed that axial stiffness and angular stiffness decreased as the offset distance from the bone surface increased. Compared to the IPF models, in the two EPF models, axial stiffness decreased by 84-94%, whereas the angular stiffness decreased by 12-21%. The locking plate used as a definitive external fixator provided a high rate of union. While the locking plate is not totally rigid, it is clinically stable and may be advisable for stiffness reduction of plating constructs, thus promoting fracture healing by callus formation. Our patients experienced a comfortable clinical course, excellent knee and ankle joint motion, satisfactory functional results and an acceptable complication rate.

  17. Close Intramedullary Interlocking Nailing Versus Locking Compression Plating In the Treatment of Closed Fracture Shaft of the Tibia.

    Science.gov (United States)

    Kundu, I K; Datta, N K; Chowdhury, A Z; Das, K P; Tarik, M M; Faisal, M A

    2016-07-01

    Fracture of tibial shaft is the commonest site of long bone fractures due to its superficial location involving young or middle-age people. Proper management is an important issue regarding the future effective movements. In this study patients were grouped in closed Intra medullary interlocking nailing and locking compression plating. Post-operative follow up at 2 weeks, 6 weeks, 12 weeks and 3 months thereafter up to 6 months were done. Each of the patients was evaluated clinically and radiologically by tucker criteria of Tuker et al. Patients were assessed for pain on full weight bearing and kneeling, shortening and range of motion of knee and ankle joints. Radiological assessment for union of fracture, alignment of fracture and angulations and position of nail and screws and infection were observed during follow up. A total number of 32 patients were selected but only 27 patients were available for follow up for a period of 6 months. They were grouped into Group A, consisting of 15 patients who took the treatment in the form of closed intramedullary interlocking nailing and Group B, consisting of 12 patients those underwent ORIF with locking compression plating. In both of the groups Motor Vehicle Accident was the main mechanism of trauma. Fracture involving the middle 3rd of the tibia is common in both the groups. During post-operative follow up, four patients in Group A complained anterior knee pain, one patient in Group B had superficial infection, most of the patients had no restriction of movement in the ankle and knee joints and a single patient in Group B showed 1.5cm shortening of the lower limb. Period of hospital stay and fracture union time were less in Group A, which was statistically significant. Both groups showed excellent result with minimum complications. So this study permits to conclude that close IM interlocking nailing and open reduction and internal fixation by locking compression plating is equally effective for the management of close

  18. The use of locking plates in proximal humeral fractures: Comparison of outcome by patient age and fracture pattern

    Directory of Open Access Journals (Sweden)

    Leonard Michael

    2009-01-01

    Full Text Available Purpose: This study was undertaken to evaluate the efficacy of a proximal humeral locking plate, and to specifically study the effect of patient age and fracture type on the outcome. Materials and Methods: Thirty-one cases of proximal humeral fractures fixed by using the proximal humeral interlocking (PHILOS plate were reviewed. Results: Average functional scores (minimum 18 months post operation per AO / ASIF fracture type were 25.3 for type A, 21.4 for type B, and 22.7 for type C. There was no statistically significant difference between the groups. The functional scores for patients over 65 years of age were significantly inferior (P = 0.03. At a final radiological review (mean 12 months post operation, 30 (96% of the patients demonstrated fracture union. Seven patients (22.5% required a second surgical procedure. Conclusion: We obtained both good functional results and bone healing with the PHILOS plate, irrespective of fracture type; the older patients had a poorer outcome. We caution the surgeons on the high potential for reoperations with its use.

  19. The gas holdup in a multiphase reciprocating plate column filled with carboxymethylcellulose solutions

    Directory of Open Access Journals (Sweden)

    I. S. STAMENKOVIC

    2005-12-01

    Full Text Available Gas holdup was investigated in a gas–liquid and gas–liquid-solid reciprocating plate column (RPC under various operation conditions. Aqueous carboxymethylcellulose (sodium salt, CMC solutions were used as the liquid phase, the solid phase was spheres placed into interplate spaces, and the gas plase was air. The gas holdup in the RPC was influenced by: the vibration intensity, i.e., the power consumption, the superficial gas velocity, the solids content and the rheological properties of the liquid phase. The gas holdup increased with increasing vibration intensity and superficial gas velocity in both the two- and three-phase system. With increasing concentration of the CMC PP 50 solution (Newtonian fluid, the gas holdup decreased, because the coalescence of the bubbles was favored by the higher liquid viscosity. In the case of the CMC PP 200 solutions (non-Newtonian liquids, the gas holdup depends on the combined influence of the rheological properties of the liquid phase, the vibration intensity and the superficial gas velocity. The gas holdup in the three-phase systems was greater than that in the two-phase ones under the same operating conditions. Increasing the solids content has little influence on the gas holdup. The gas holdup was correlated with the power consumption (either the time-averaged or total power consuption and the superficial gas velocity.

  20. Minimally invasive proximal interphalangeal joint arthrodesis using a locking compression plate and tissue engineering in horses: a pilot study.

    Science.gov (United States)

    Seo, Jong-pil; Yamaga, Takashi; Tsuzuki, Nao; Yamada, Kazutaka; Haneda, Shingo; Furuoka, Hidefumi; Tabata, Yasuhiko; Sasaki, Naoki

    2014-11-01

    This pilot study assessed the efficacy of 2 minimally invasive techniques for proximal interphalangeal (PIP) joint arthrodesis in horses. The PIP joints of both forelimbs (n = 6) were stabilized with locking compression plates (LCP) using a minimally invasive technique (LCP technique). Subsequently, for 1 randomly selected PIP joint of each horse, surgical drilling (SurD) was performed and tissue engineering (TE) was applied (LCP/SurD/TE technique). Minimally invasive PIP joint arthrodesis with LCP demonstrated low postoperative infection rates. Gross and histological evaluations revealed considerable destruction of the articular cartilage in the LCP/SurD/TE-treated joints. In contrast, almost no destruction of the cartilage was observed in the LCP-treated joints. Our results suggest that the LCP technique alone is not sufficient for PIP joint arthrodesis and that the LCP/SurD/TE technique may be useful for PIP joint arthrodesis in horses.

  1. Bilateral traumatic proximal humerus fractures managed by open reduction and internal fixation with locked plates

    Institute of Scientific and Technical Information of China (English)

    Atin Jaiswal; Naiman Deepak Kachchhap; Rupak Chaterjee; Yashwant Singh Tanwar; Masood Habib; Satya Prakash Singh

    2013-01-01

    Fractures of the proximal humerus are uncommon in young patients.Although bilateral fracture of proximal humerus itself is rare,association with epilepsy and electrocution is frequent.Only one case of traumatic bilateral proximal humerus fracture has been reported in the literature.We report a rare case of bilateral traumatic displaced proximal humerus fractures in a 40 years old male patient,which was treated by means of open reduction and internal fixation with proximal humerus locked pates on both sides and obtained a good functional outcome.

  2. Bilateral traumatic proximal humerus fractures managed by open reduction and internal fixation with locked plates

    Directory of Open Access Journals (Sweden)

    Jaiswal Atin

    2013-12-01

    Full Text Available 【Abstract】Fractures of the proximal humerus are uncommon in young patients. Although bilateral fracture of proximal humerus itself is rare, association with epilepsy and electrocution is frequent. Only one case of traumatic bilateral proximal humerus fracture has been reported in the literature. We report a rare case of bilateral traumatic dis- placed proximal humerus fractures in a 40 years old male patient, which was treated by means of open reduction and internal fixation with proximal humerus locked pates on both sides and obtained a good functional outcome. Key words: Humeral fractures; Shoulder fractures; Fracture fixation, internal

  3. Bilateral traumatic proximal humerus fractures managed by open reduction and internal fixation with locked plates.

    Science.gov (United States)

    Jaiswal, Atin; Kachchhap, Naiman Deepak; Chaterjee, Rupak; Tanwar, Yashwant Singh; Habib, Masood; Singh, Satya Prakash

    2013-01-01

    Fractures of the proximal humerus are uncommon in young patients. Although bilateral fracture of proximal humerus itself is rare, association with epilepsy and electrocution is frequent. Only one case of traumatic bilateral proximal humerus fracture has been reported in the literature. We report a rare case of bilateral traumatic displaced proximal humerus fractures in a 40 years old male patient, which was treated by means of open reduction and internal fixation with proximal humerus locked pates on both sides and obtained a good functional outcome.

  4. [Analysis and discussion on the facet of the spinal column, spiral CT lock multiplanar reconstruction and 
3D reconstruction].

    Science.gov (United States)

    Zheng, Zhifeng; Wang, Shuhang; Si, Donglei

    2015-10-01

    To investigate the imaging appearances and diagnostic value of axial CT scanning, spiral CT multiplanar reconstruction (MPR) and three-dimensional (3D) reconstruction in vertebral facet joints locking.
 A total of 31 cases of vertebral facet joints locking, with injuries in different parts, were recruited to explore their CT features, and to evaluate their advantages in diagnosis against each other.
 Among the CT images of 31 cases with "Hamburger" sign in axial view, there were 21 cases of cervical spine and 10 cases of thoracolumbar segment; in vertical plane of MPR, "top to top" form was formed below the inferior and the superior articular process, accompanied by I° spondylolisthesis and inferior articular process tip fracture; 5 cases were unilateral locked cervical spine; none case for thoracolumbar segment. The inferior articular process was crossed with the superior articular process below and moved forward, formed "back to back" form, accompanied by II°-III° spondylolisthesis. 9 or 6 cases were bilateral or unilateral locking cervical spine, 10 cases were thoracolumbar segment, accompanied by teardrop fracture in the vertebral body below cervical spine. In coronal plane of MPR, inferior articular process showed ingression in different extent, and relied on the superior articular process below or locked in the articular fossa (21 cases for cervical spine); inferior articular process displayed upward displacement or appeared with the superior articular process at the same time, which meant joint structure disappearing thoracolumbar segment (10 cases). In 3D reconstruction, 31 cases displayed clearly in the spatial form of vertebral facet joints locking and the degree of spondylolisthesis of vertebral body.
 MPR and 3D image were more clear and intuitive in vertebral facet joints locking comparing to axial CT scan image. Spiral CT MPR and 3D reconstruction contributed to the diagnosis of vertebral facet joints locking and the reduction of misdiagnoses

  5. Clinical evaluation of locking compression plate fixation for comminuted olecranon fractures

    NARCIS (Netherlands)

    Buijze, G.; Kloen, P.

    2009-01-01

    BACKGROUND: In patients managed with plate fixation for the treatment of an olecranon fracture, the placement of an axial intramedullary screw may obstruct the placement of bicortical screws in the ulnar shaft. To overcome this problem, unicortical screws can be applied with use of a contoured locki

  6. A bubble column evaporator with basic flat-plate condenser for brackish and seawater desalination.

    Science.gov (United States)

    Schmack, Mario; Ho, Goen; Anda, Martin

    2016-01-01

    This paper describes the development and experimental evaluation of a novel bubble column-based humidification-dehumidification system, for small-scale desalination of saline groundwater or seawater in remote regions. A bubble evaporator prototype was built and matched with a simple flat-plate type condenser for concept assessment. Consistent bubble evaporation rates of between 80 and 88 ml per hour were demonstrated. Particular focus was on the performance of the simple condenser prototype, manufactured from rectangular polyvinylchlorid plastic pipe and copper sheet, a material with a high thermal conductivity that quickly allows for conduction of the heat energy. Under laboratory conditions, a long narrow condenser model of 1500 mm length and 100 mm width achieved condensate recovery rates of around 73%, without the need for external cooling. The condenser prototype was assessed under a range of different physical conditions, that is, external water cooling, partial insulation and aspects of air circulation, via implementing an internal honeycomb screen structure. Estimated by extrapolation, an up-scaled bubble desalination system with a 1 m2 condenser may produce around 19 l of distilled water per day. Sodium chloride salt removal was found to be highly effective with condensate salt concentrations between 70 and 135 µS. Based on findings and with the intent to reduce material cost of the system, a shorter condenser length of 750 mm for the non-cooled (passive) condenser and of 500 mm for the water-cooled condenser was considered to be equally efficient as the experimentally evaluated prototype of 1500 mm length.

  7. Development of micromachined preconcentrators and gas chromatographic separation columns by an electroless gold plating technology

    Science.gov (United States)

    Kuo, C.-Y.; Chen, P.-S.; Chen, H.-T.; Lu, C.-J.; Tian, W.-C.

    2017-03-01

    In this study, a simple process for fabricating a novel micromachined preconcentrator (μPCT) and a gas chromatographic separation column (μSC) for use in a micro gas chromatograph (μGC) using one photomask is described. By electroless gold plating, a high-surface-area gold layer was deposited on the surface of channels inside the μPCT and μSC. For this process, (3-aminopropyl) trimethoxysilane (APTMS) was used as a promoter for attaching gold nanoparticles on a silicon substrate to create a seed layer. For this purpose, a gold sodium sulfite solution was used as reagent for depositing gold to form heating structures. The microchannels of the μPCT and μSC were coated with the adsorbent and stationary phase, Tenax-TA and polydimethylsiloxane (DB-1), respectively. μPCTs were heated at temperatures greater than 280 °C under an applied electrical power of 24 W and a heating rate of 75 °C s‑1. Repeatable thermal heating responses for μPCTs were achieved; good linearity (R 2  >  0.9997) was attained at three heating rates for the temperature programme for the μSC (0.2, 0.5 and 1 °C s‑1). The volatile organic compounds (VOCs) toluene and m-xylene were concentrated over the μPCT by rapid thermal desorption (peak width of half height (PWHH)  7900. The VOCs acetone, benzene, toluene, m-xylene and 1,3,5-trimethylbenzene were also separated on the μSC as evidenced by their different retention times (47–184 s).

  8. Screw augmentation reduces motion at the bone-implant interface: a biomechanical study of locking plate fixation of proximal humeral fractures.

    Science.gov (United States)

    Schliemann, Benedikt; Seifert, Robert; Rosslenbroich, Steffen B; Theisen, Christina; Wähnert, Dirk; Raschke, Michael J; Weimann, Andre

    2015-12-01

    Shear forces at the bone-implant interface lead to a loss of reduction after locking plate fixation of proximal humeral fractures. The aim of the study was to analyze the roles of medial support screws and screw augmentation in failure loads and motion at the bone-implant interface after locking plate fixation of proximal humeral fractures. Unstable 3-part fractures were simulated in 6 pairs of cadaveric humeri and were fixed with a DiPhos-H locking plate (Lima Corporate, Udine, Italy). An additional medial support screw was implanted in 1 humerus of every donor. The opposite humerus was stabilized with a medial support screw and additional bone cement augmentation of the 2 anteriorly directed head screws. Specimens were loaded in the varus bending position. Stiffness, failure loads, plate bending, and the motion at the bone-implant interface were evaluated using an optical motion capture system. The mean load to failure was 669 N (standard deviation [SD], 117 N) after fixation with medial support screws alone and 706 N (SD, 153 N) after additional head screw augmentation (P = .646). The initial stiffness was 453 N/mm (SD, 4.16 N/mm) and 461 N/mm (SD, 64.3 N/mm), respectively (P = .594). Plate bending did not differ between the 2 groups. However, motion at the bone-implant interface was significantly reduced after head screw augmentation (P Board of Trustees. Published by Elsevier Inc. All rights reserved.

  9. FUNCTIONAL OUTCOME OF LOCKING COMPRESSION PLATE OSTEOSYNTHESIS IN SCHATZKER’S TYPE V AND VI TIBIAL PLATEAU FRACTURES

    Directory of Open Access Journals (Sweden)

    Deependra

    2015-11-01

    Full Text Available : Tibial plateau fractures are the common injuries that may be associated with poor outcomes and a high rate of complications. The problem rise significantly in high energy trauma and severe soft tissue injuries. Early technique of osteosysnthesis were based on extensive surgical approach. Introduction of minimally invasive plate osteosynthesis using locking compression plate conserves the vascularity of the bone but also leads to the overall improvement in the values of bone healing. MATERIALS AND METHODS: Inclusion criteria for this study were patients of either sex, tibial plateau fractures Schatzker’s Type V and VI, age group 15 to 60 years and compounding upto Gustilo and Anderson’s Grade II and excluded the patients where the compounding was grade III and displacement <2mm. The fractures were treated applying LCP percutaneously either medially or laterally depending on the side of comminution. RESULTS: In our study conducted on 45 patients 4 lost to follow up in first 6 months with displaced tibial plateau overall the functional result using Rasmussen’s criteria was acceptable in all of the cases with an average score of 26.38. All the patients in our series showed union with average time for union being 13.3 weeks. DISCUSSION: Our study confirms that minimally invasive locking compression plate osteosynthesis is a viable alternative as a treatment for open tibial plateau fractures Gustilo and Anderson’s type I and II. The incidence of infection in our study wad 10% which is comparable with most of the series in literature that select the high energy tibial plateau fractures. None of the patients had nonunion only one had delayed union and does not required bone grafting as the metaphyseal area has a good blood supply. There were superficial infection in 4 cases which resolved to the dressing and antibiotic treatment within 3 weeks. The mean range motion at knee joint was 5 degree to 130 degree.(1 CONCLUSION: This paper reports the

  10. ROLE OF LOW PROFILE PRECONTOURED DISTAL TIBIAL LOCKING PLATE USING MIPPO TECHNIQUE IN PILON FRACTURE

    Directory of Open Access Journals (Sweden)

    Isaac Sunder

    2015-10-01

    Full Text Available : Tibial pilon fracture – Spectrum of injury ranging from fractures caused by low energy rotational foces to fractures caused by high energy axial compression forces due to RTA/ fall from height with significant metaphyseal communition articular communition with diaphyseal extension. Almost 80% patients will have fibula fracture. The aim of the study is study the efficacy of LP PD DTP in the management of closed pilon fractures (OTA type A Type B and Type C 1 and open pilon fractures (Grade 1 Grade II Grade III A (Gustilo Anterson grading. 1. I have studied 21 patients of pilon fracture classified using AO/OTA classification Type A-metaphyseal; Type B–Partially articular; Type C Metaphyseal fracture with articular involvement. 2. Used LP/ PC/ Distal tibial plate using MIPPO technique in OTA–A, B and C 1 closed & grade I II Grade III A compound fractures. OBSERVATIONS: 1. In contrary to stages protocol (Ist external fixation with fibular plating after 2-3 Weeks ORIF/MIPPO with/Without bone grafting, it is done percutaneously or minimally invasive and it can be done on day 1 without any major soft tissue problem & post-operative infection. 2. Duration of stay in the hospital can be reduced. 3. Since it is done through calcaneal traction or femoral distractor – fibula length restored & plating may not be necessary all the time and fibula plating can be avoid if the soft tissue condition is not favorable for plating laterally. 4. Since it is done through calcaneal traction/femoral distractor inspite of ground glass communition–good reduction is almost always possible. 5. Since MIPPO–need for bone grafting in less. 6. As in staged protocol more time is spent in soft tissue healing and after 2–3 weeks, fractures reduction if difficult and almost impossible with indirect reduction and may warrant open reduction. I conclude that LP PC distal tibial plate using MIPPO technique offers several advantages over two staged protocol and improved

  11. Biomechanical comparison of dynamic condylar screw and locking compression plate fixation in unstable distal femoral fractures: An in vitro study

    Directory of Open Access Journals (Sweden)

    Ashutosh Kumar Singh

    2013-01-01

    Full Text Available Background: Distal femur fractures are difficult to manage and the selection of implant for internal fixation remains controversial. The objective of this study is to establish the relative strength of fixation of a distal femoral locking plate (DFLP compared with the dynamic condylar screw (DCS in the distal femur fractures. Materials and Methods: Study was conducted on 16 freshly harvested cadaveric distal femoral specimens, eight implanted with DCS and other eight with DFLP. The construct was made unstable by removing a standard sized medial wedge of 1 cm base (gap-osteotomy beginning 6 cm proximal to the lateral joint line in distal metaphyseal region with the loss of medial buttress. Fatigue test was conducted under load control mode at the frequency of I Hz. Specimens were subjected to cyclic loading of 2 kN, under observation for 50,000 cycles or until failure/cutout, which ever occurred earlier. Results: In DFLP group, there was no implant failure and the average number of cycles sustained was 50,000. Six out of eight specimens completed 50,000 cycles and two failed in DCS group. The average number of cycles sustained by DCS was 46150. Though the bone quality as assessed by dual energy X-ray absorptiometry DEXA was comparable in both DFLP and DCS group ( P = 0.06, none failed in DFLP group and subsidence was 1.02 ± 0.34 mm (range: 0.60-1.32 mm, which was significantly 43% lower ( P = 0.006 than subsidence in DCS group (1.82 ± 0.58; range: 1.20-3.08 mm. The average stiffness of DCS group was 52.8 ± 4.2 N/mm, which was significantly lower than average stiffness of locked condylar plate group (71.2 ± 5.1 N/mm ( P = 0.02. Conclusions: DFLP fixation of the distal femur fractures resulted in stronger construct than the DCS fixation in both cyclic loading and ultimate strength in biomechanical testing of a simulated A3 distal femur fracture.

  12. Additive fiber-cerclages in proximal humeral fractures stabilized by locking plates: no effect on fracture stabilization and rotator cuff function in human shoulder specimens.

    Science.gov (United States)

    Voigt, Christine; Hurschler, Christof; Rechi, Louise; Vosshenrich, Rolf; Lill, Helmut

    2009-08-01

    The effect of additive fiber-cerclages in proximal humeral fractures stabilized by locking plates on fracture stabilization and rotator cuff function is unclear. Here it was assessed in a human cadaver study. 24 paired human shoulder specimens were harvested from median 77-year-old (range 66-85) female donors. An unstable 3-part fracture model with an intact rotator cuff was developed. 1 specimen of each pair received an additive fiber-cerclage of the rotator cuff after plate fixation, and the other one received a plate fixation without an additive fiber-cerclage. Force-controlled hydraulic cylinders were used to simulate physiological rotator cuff tension, while a robot-assisted shoulder simulator performed 4 relevant cases of load: (1) axial loading at 0 degrees, (2) glenohumeral abduction at 60 degrees, (3) internal rotation at 0 degrees abduction, and (4) external rotation at 0 degrees abduction, and imitated hanging arm weight during loading without affecting joint kinematics. A 3-dimensional real-time interfragmentary motion analysis was done in fracture gaps between the greater tuberosity and the head, as well as subcapital. The capacity of the rotator cuff to strain was analyzed with an optical system. Interfragmentary motion was similar between the groups with and without fiber-cerclages, in both fracture gaps and in any of the cases of load. Cerclages did not impair the capacity of the rotator cuff to strain. INTERPRETATION; Provided that unstable 3-part fractures are reduced and stabilized anatomically by a locking plate, additive fiber-cerclages do not reduce interfragmentary motion. Additive fiber-cerclages may be necessary in locking plate osteosyntheses of multiple-fractured greater tuberosities or lesser tuberosity fractures that cannot be fixed sufficiently by the plate.

  13. Biomechanical Analysis Of The Proximal Femoral Locking Compression Plate: Do Quality Of Reduction And Screw Orientation Influence Construct Stability?

    Science.gov (United States)

    Zderic, Ivan; Oh, Jong-Keon; Stoffel, Karl; Sommer, Christoph; Helfen, Tobias; Camino, Gaston; Richards, R Geoff; Nork, Sean E; Gueorguiev, Boyko

    2017-08-22

    To investigate biomechanically in a human cadaveric model the failure modes of the Proximal Femoral Locking Compression Plate (PF-LCP) and explore the underlying mechanism. Twenty-four fresh-frozen paired human cadaveric femora with simulated unstable intertrochanteric fractures (AO/OTA 31-A3.3) were assigned to four groups with six specimens each for plating with PF-LCP. The groups differed in the quality of fracture reduction and plating fashion of the first and second proximal screws as follows: 1) anatomical reduction with on-axis screw placement; 2) anatomical reduction with off-axis screw placement; 3) malreduction with on-axis screw placement; 4) malreduction with off-axis screw placement. The specimens were tested until failure using a protocol with combined axial and torsional loading. Mechanical failure was defined as abrupt change in machine load-displacement data. Clinical failure was defined as 5° varus tilting of the femoral head as captured with optical motion tracking. Initial axial stiffness (N/mm) in groups 1 to 4 was 213.6±65.0, 209.5±134.0, 128.3±16.6 and 106.3±47.4, respectively. Numbers of cycles to clinical and mechanical failure were 16642±10468 and 8695±1462 in group 1, 14076±3032 and 7449±5663 in group 2, 8800±8584 and 4497±2336 in group 3 and 9709±3894 and 5279±4119 in group 4. Significantly higher stiffness as well as numbers of cycles to both clinical and mechanical failure were detected in group 1 in comparison to group 3, P≤0.044. Generally, malreduction led to significantly earlier construct failure. The observed failures were cut-out of the proximal screws in the femoral head, followed by either screw bending, screw loosening or screw fracture. Proper placement of the proximal screws in anatomically reduced fractures led to significantly higher construct stability. Our data also indicates that once the screws are placed off-axis (>5 degrees), the benefit of an anatomic reduction is lost.

  14. Biomechanical evaluation of fracture fixation constructs using a variable-angle locked periprosthetic femur plate system.

    Science.gov (United States)

    Hoffmann, Martin F; Burgers, Travis A; Mason, James J; Williams, Bart O; Sietsema, Debra L; Jones, Clifford B

    2014-07-01

    In the United States there are more than 230,000 total hip replacements annually, and periprosthetic femoral fractures occur in 0.1-4.5% of those patients. The majority of these fractures occur at the tip of the stem (Vancouver type B1). The purpose of this study was to compare the biomechanically stability and strength of three fixation constructs and identify the most desirable construct. Fifteen medium adult synthetic femurs were implanted with a hip prosthesis and were osteotomized in an oblique plane at the level of the implant tip to simulate a Vancouver type B1 periprosthetic fracture. Fractures were fixed with a non-contact bridging periprosthetic proximal femur plate (Zimmer Inc., Warsaw, IN). Three proximal fixation methods were used: Group 1, bicortical screws; Group 2, unicortical screws and one cerclage cable; and Group 3, three cerclage cables. Distally, all groups had bicortical screws. Biomechanical testing was performed using an axial-torsional testing machine in three different loading modalities (axial compression, lateral bending, and torsional/sagittal bending), next in axial cyclic loading to 10,000 cycles, again in the three loading modalities, and finally to failure in torsional/sagittal bending. Group 1 had significantly greater load to failure and was significantly stiffer in torsional/sagittal bending than Groups 2 and 3. After cyclic loading, Group 2 had significantly greater axial stiffness than Groups 1 and 3. There was no difference between the three groups in lateral bending stiffness. The average energy absorbed during cyclic loading was significantly lower in Group 2 than in Groups 1 and 3. Bicortical screw placement achieved the highest load to failure and the highest torsional/sagittal bending stiffness. Additional unicortical screws improved axial stiffness when using cable fixation. Lateral bending was not influenced by differences in proximal fixation. To treat periprosthetic fractures, bicortical screw placement should be

  15. [Bisegmental anterior interbody spondylodesis, using rigid plates, in surgical treatment of cervical vertebral column traumas and diseases].

    Science.gov (United States)

    Barysh, A E; Kozyrev, S A

    2015-02-01

    Results of surgical treatment of 34 patients, suffering cervical vertebral column traumas and diseases, are analyzed. In all the patients bisegmental anterior interbody spondylodesis was conducted, using cervical rigid plates and vertical cylindrical net implants. The existing and newly obtained information about changes in the radiological indices dynamics while the method application by its authors is presented. The interbody synostosis was achieved in 82.4% patients in 1 yr after the operation. The complications rate while the implants application have constituted 23.3%, and the total rate of complications--29.1%.

  16. Measurement of buckling load for metallic plate columns in severe accident conditions

    Energy Technology Data Exchange (ETDEWEB)

    Jo, Byeongnam, E-mail: jo@vis.t.u-tokyo.ac.jp; Sagawa, Wataru, E-mail: sagawa@vis.t.u-tokyo.ac.jp; Okamoto, Koji, E-mail: okamoto@n.t.u-tokyo.ac.jp

    2014-07-01

    Highlights: • Buckling load was experimentally measured in a wide range of temperature up to 1200 °C. • Two different test methods for measuring buckling failure load were suggested and compared. • Creep buckling under compressive load was performed to explain results of buckling tests. • Reduced buckling load was explained by effects of creep buckling, geometrical imperfection, and thermal stress. • Buckling processes were visualized by a high speed camera. - Abstract: In severe accidents, a reactor pressure vessel, its components, and piping have to be under extremely high temperature and high pressure conditions, which results in failure modes like rupture by internal pressure, buckling, creep, and their combinations. In this study, buckling (failure) load was experimentally measured for metallic columns under the compressive force from room temperature up to 1200 °C. A stainless steel was chosen to be a test material to measure the buckling load. Two different test methods were employed to explore the effect of thermal history of the material on the buckling load. Particularly, the effect of creep under a compressive load was considered as a reason for the reduced buckling load at high temperatures. Additionally, finite element simulations were also conducted to predict buckling load for both an ideal column and a column with geometrical imperfection as well. Moreover, buckling process was visualized using a high speed camera to understand buckling processes.

  17. Diffuser Plate Characteristics Of Sciamachy And Gome-2 And Their Impact On Trace Gas Column Retrievals

    Science.gov (United States)

    de Beek, R.; Weber, M.; Richter, A.; Burrows, J. P.

    2003-04-01

    The Global Ozone Monitoring Experiment (GOME) flying on ERS-2 since 1995 has two follow-on instruments, which are the SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIAMACHY) aboard ENVISAT and the GOME-2 series planned to operate on METOP satellites after 2005. All three instruments perform measurements of sun-light reflected and scattered by the earth atmosphere or surface, and the direct extra-terrestrial solar spectrum reflected into the instrument by aluminium diffuser plates. These induce spectral characteristics in sun-normalised radiances correlating with atmospheric absorption of several trace species in the ultraviolet and visible (240 nm - 600 nm). Investigations of this characteristics from from on-ground and, for SCIAMACHY, in-flight measurements using white-light sources have been performed in the framework of error analyses studies for SCIA-MACHY (funded by ESA) and GOME-2 (funded by EUMETSAT). For GOME-2, a change of the diffuser plate material to a quartz-volume diffuser is currently under investigation. A method to separate diffuser plate spectral structures as well as error estimates for the retrieval of BrO and NO_2 in the spectral windows 344-360 nm and 425-450 nm of Channels 2 and 3 of the instruments, respectively, are presented.

  18. Applying the digital-image-correlation technique to measure the deformation of an old building’s column retrofitted with steel plate in an in situ pushover test

    Indian Academy of Sciences (India)

    Shih-Heng Tung; Ming-Hsiang Shih; Wen-Pei Sung

    2014-06-01

    An in situ pushover test is carried out on an old building of Guan-Miao elementary school in south Taiwan. Columns of this building are seismically retrofitted with steel plate. The DIC (digital-image-correlation) technique is used to measure the deformation of the retrofitted column. The result shows that the DIC technique can be successfully applied to measure the relative displacement of the column. Additionally, thismethod leads to the measurement of relative displacements formany points on the column simultaneously. Hence, the column deformation curve, rotation and curvature can be determined using interpolation method. The resulting curvaturediagram reveals that the phenomenon of plastic hinge occurs at about 2% storey drift ratio, and that the DIC technique can be applied to measure column deformation in a full scale in situ test.

  19. Treatment of comminuted proximal humeral fractures by locking plate%锁定钢板治疗肱骨近端粉碎性骨折

    Institute of Scientific and Technical Information of China (English)

    陈晓东; 王宇仁; 崔一民; 王栋梁; 王伟; 董海; 沈超; 何继业; 蒋雷声

    2008-01-01

    目的 了解锁定钢板治疗粉碎性肱骨近端骨折的疗效及相关手术技术.方法 2003年2月-2007年3月,采用锁定钢板治疗肱骨近端粉碎性骨折34例,其中21例采用肱骨近端锁定钢板(locking proximal humerus plate,LPHP),13例采用肱骨近端锁定系统(proximal humerus interlockingsystem,PHILOS).根据Neer分型,三部分骨折30例,四部分骨折4例.结果 术后32例获得12~36个月随访,平均18.6个月.2例失访.术后骨折均愈合,无内固定失效,骨折平均愈合时间为10周.根据Constant评分标准评定:优4例,良23例,可4例,差1例;优良率为84.4%.其中60岁以下Constant评分平均为83(77~90),60岁以上平均为72(30~86).三部分骨折评分平均为76(70~90),而四部分骨折平均为60(30~74).结论 锁定钢板是治疗肱骨近端粉碎性骨折的有效方法.肱骨近端内侧的有效支撑以及减少软组织剥离是手术成功的关键.%Objective To investigate the surgical techniques and evaluate the results of locking plate in treatment of comminuted proximal humeral fractures. Methods From February 2003 to March 2007, 34 cases of Comminuted proximal humeral fractures were treated using locking plate manufactured by Synthes (21 cases with locking proximal humerus plate, LPHP; 13 cases with proximal humerus interlocking system, PHILOS). There were 9 males and 25 females. The ages of this group ranged from 43 to 81 years, with an average of 64.7 years. According to Neer classification, there were 30 cases of three-part fractures, and 4 cases of four-part fractures. Results The follow-up period of 32 cases ranged from 12 months to 36 months, the average being 18.6 months. Two were lost for follow up. Bone union was achieved in all the cases, with the mean healing period of 10 weeks. According to Constant scoring, the excellent and good result rate was 84.4%. Conclusion Locking plate is an effective method for treating comminuted proximal humeral fractures. Mechanical

  20. Societal costs in displaced transverse olecranon fractures: using decision analysis tools to find the most cost-effective strategy between tension band wiring and locked plating.

    Science.gov (United States)

    Francis, Tittu; Washington, Travis; Srivastava, Karan; Moutzouros, Vasilios; Makhni, Eric C; Hakeos, William

    2017-09-15

    Tension band wiring (TBW) and locked plating are common treatment options for Mayo IIA olecranon fractures. Clinical trials have shown excellent functional outcomes with both techniques. Although TBW implants are significantly less expensive than a locked olecranon plate, TBW often requires an additional operation for implant removal. To choose the most cost-effective treatment strategy, surgeons must understand how implant costs and return to the operating room influence the most cost-effective strategy. This cost-effective analysis study explored the optimal treatment strategies by using decision analysis tools. An expected-value decision tree was constructed to estimate costs based on the 2 implant choices. Values for critical variables, such as implant removal rate, were obtained from the literature. A Monte Carlo simulation consisting of 100,000 trials was used to incorporate variability in medical costs and implant removal rates. Sensitivity analysis and strategy tables were used to show how different variables influence the most cost-effective strategy. TBW was the most cost-effective strategy, with a cost savings of approximately $1300. TBW was also the dominant strategy by being the most cost-effective solution in 63% of the Monte Carlo trials. Sensitivity analysis identified implant costs for plate fixation and surgical costs for implant removal as the most sensitive parameters influencing the cost-effective strategy. Strategy tables showed the most cost-effective solution as 2 parameters vary simultaneously. TBW is the most cost-effective strategy in treating Mayo IIA olecranon fractures despite a higher rate of return to the operating room. Copyright © 2017 Journal of Shoulder and Elbow Surgery Board of Trustees. Published by Elsevier Inc. All rights reserved.

  1. 应用锁定钢板治疗股骨转子间骨折%Treatment of intertrochanteric fracture with proximal femoral lock plate

    Institute of Scientific and Technical Information of China (English)

    李志洲; 徐衍斌; 王再欣; 于欣; 周凤吉; 季晓风

    2012-01-01

    Objective To evaluate retrospectively the effect for treatment of intertrochanteric comminuted fracture with lock plate. Methods A retrospective analysis was conduced to investigate 237 cases of intertrochanteric comminuted fracture which were treated with femoral lock plate from April 2007 to February 2010 , we evaluated the bone union time and hip function of the 210 patients whom were well followed up for average 12.5months (from 6 to 34months). Results This operation is easy to manage, with the advantage of stable fixation, the average union time was 21 weeks (range 12 to 32 weeks). Superficial vein thrombosis in 12 cases, decubitus ulcer in 3 cases, pneumonia in 4 cases, varus deformation in 2 cases were found, 10 patients were changed to hip arthroplasty surgery. The end results were 161 excellent, 18 good, based on Harris hip scale. Conclusion Excellent clinical effects can be achieved if the patients are treated correctly, femoral lock plate may be a better option for the treatment of intertrochanteric comminuted fracture.%目的 回顾分析锁定钢板治疗股骨转子间粉碎性骨折疗效.方法 2007 年4 月~ 2010年2月应用锁定钢板治疗237 例转子间粉碎性骨折患者,回顾分析其中210 例获得随访患者临床疗效,平均随访12.5 个月( 6~34月),观察骨折愈合时间,髋关节功能恢复情况.结果 平均骨折愈合时间21周(12~32 周),发生浅静脉血栓12例,褥疮3例,肺内感染4例,髋内翻2 例,改行人工关节置换10例.按照Harris 评分髋关节功能优161 例,良18 例,可19例,差12 例.结论 应用锁定钢板治疗转子间粉碎性骨折,手术操作简单,固定稳定,能够获得良好的临床疗效,是治疗转子间粉碎性骨折的较好选择.

  2. Fixation of complex proximal humeral fractures in elderly patients with a locking plate: A retrospective analysis of radiographic and clinical outcome and complications

    Institute of Scientific and Technical Information of China (English)

    Fabio Rodia; Emmanouil Theodorakis; Georgios Touloupakis; Angelo Ventura

    2016-01-01

    Purpose:The optimal surgical treatment of displaced type B and C fractures of the proximal humerus in the elderly remains controversial.Good clinical results have been reported by plating these fractures as well as a high rate of complications.Our retrospective study aims to evaluate clinical recovery and complications using the S3 locking plate in elderly patients.Methods:Fifty-one patients older than 65 years of age,with a complex proximal humeral fracture type B or C (AO classification system),were included.Patients have been followed up for a minimum of 12 months.We assessed callus formation,radiological results,clinical outcome (according to the Constant Shoulder Score System) and complications.Any difference in the clinical recovery among the 2 types of fracture pattern (B and C) was investigated.Results:The mean time of fracture healing was 12.4 weeks.The mean Constant score at 3,6 and 12 months was 68,73 and 75 respectively.No statistically significant difference in the clinical outcome was observed between the B and C fracture patterns (p > 0.05).We noticed an overall of 5 complications (9.8%).There was no need to revision any of the implants.Conclusion:Anatomic reduction and proper plate positioning are essential for minimizing implantrelated complications.In our experience the S3 angular stability system offers a proper osteosyntesis and a good clinical recovery with a low rate of complications.

  3. Study of axial mixing, holdup and slip velocity of dispersed phase in a pulsed sieve plate extraction column using radiotracer technique

    Energy Technology Data Exchange (ETDEWEB)

    Ghiyas Ud Din [Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences -PIEAS, P.O Nilore, Islamabad (Pakistan); Isotope Application Division, Pakistan Institute of Nuclear Science and Technology - PINSTECH, P.O Nilore, Islamabad (Pakistan)], E-mail: fac192@pieas.edu.pk; Imran Rafiq Chughtai; Mansoor Hameed Inayat [Department of Chemical and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences - PIEAS, P.O Nilore, Islamabad (Pakistan); Iqbal Hussain Khan [Isotope Application Division, Pakistan Institute of Nuclear Science and Technology - PINSTECH, P.O Nilore, Islamabad (Pakistan)

    2009-07-15

    Axial mixing, holdup and slip velocity of dispersed phase which are parameters of fundamental importance in the design and operation of liquid-liquid extraction pulsed sieve plate columns have been investigated. Experiments for residence time distribution (RTD) analysis have been carried out for a range of pulsation frequency and amplitude in a liquid-liquid extraction pulsed sieve plate column with water as dispersed and kerosene as continuous phase using radiotracer technique. The column was operated in emulsion region and {sup 99m}Tc in the form of sodium pertechnetate eluted from a {sup 99}Mo/{sup 99m}Tc generator was used to trace the dispersed phase. Axial dispersed plug flow model with open-open boundary condition and two points measurement method was used to simulate the hydrodynamics of dispersed phase. It has been observed that the axial mixing and holdup of dispersed phase increases with increase in pulsation frequency and amplitude until a maximum value is achieved while slip velocity decreases with increase in pulsation frequency and amplitude until it approaches a minimum value. Short lived and low energy radiotracer {sup 99m}Tc in the form of sodium pertechnetate was found to be a good water tracer to study the hydrodynamics of a liquid-liquid extraction pulsed sieve plate column operating with two immiscible liquids, water and kerosene. Axial dispersed plug flow model with open-open boundary condition was found to be a suitable model to describe the hydrodynamics of dispersed phase in the pulsed sieve plate extraction column.

  4. Development and clinical application of locking plate positioning connector%锁定钢板定位连接器的研制与临床应用

    Institute of Scientific and Technical Information of China (English)

    杨鹏; 翟睿; 史建民

    2012-01-01

    目的 设计一种锁定钢板的定位连接装置,探讨其在应用MIPPO技术治疗中的优越性.方法 将自制锁定钢板定位连接器应用于40例下肢骨折患者手术中,其中胫腓骨骨折18例,股骨近端骨折12例,股骨远端骨折10例.结果 40例手术均顺利完成,术中未发生定位偏差;切口长度7.3~16.5(12.2±2.24)cm,术中出血量80~310(110±25)ml,术后住院时间3~12(6±2.1)d.患者均获随访,时间6~26(12±2.4)个月.骨折均骨性愈合,时间5~7个月.1例术后出现腓浅神经麻痹.结论 锁定钢板定位连接器的应用能准确定位皮下钢板钉孔,减小手术切口和术中出血量,缩短患者住院时间,是锁定钢板微创手术中一个实用小工具.%Objective To design of a locking plate positioning and connecting device, and to discuss the application of MIPPO technology. Methods Self locking plate locating connector was used in 40 cases of lower limb fracture patients in operation, including 18 cases of tibia and fibula fractures, proximal femoral fracture in 12 cases, 10 cases of distal femoral fractures. Results 40 cases of laparoscopic operation were successful, with no positional deviation; operation incision length 7. 3 ~ 16. 5( 12. 2 ±2. 24 ) cm, intraoperative bleeding volume 80 ~310( 110 ±25 ) ml,postoperative hospital stay was 3~12(6±2. 1) days. All cases were followed up for 6 ~ 26( 12 ± 2. 4 ) months, the fractures were healed, 5 to 7 months; 1 case of postoperative superficial peroneal nerve palsy. Conclusions Application of locking plate locating connector can be accurately positioned subcutaneously steel nail hole, which can reduce the operation incision and bleeding in the operation, shorten the time of hospitalization. It is a locking plate of minimally invasive operation in a practical gadget.

  5. Outcomes and financial implications of intra-articular distal radius fractures: a comparative study of open reduction internal fixation (ORIF) with volar locking plates versus nonoperative management.

    Science.gov (United States)

    Toon, Dong Hao; Premchand, Rex Antony Xavier; Sim, Jane; Vaikunthan, Rajaratnam

    2017-02-02

    To evaluate the functional and radiographic outcomes, as well as the treatment costs, of closed displaced intra-articular distal radius fractures treated with either open reduction internal fixation (ORIF) with volar locking plates or nonoperative treatment with plaster cast immobilisation. A total of 60 patients (32 receiving ORIF, 28 receiving nonoperative treatment) with closed intra-articular distal radius fractures were included. The mean age was 52.1 and 57.4, respectively. Functional and radiographic assessments were carried out at 12 months post-injury. Patients' treatment costs, median salaries and lengths of medical leave were obtained. DASH and MAYO wrist score in the ORIF group did not differ significantly from those in the nonoperative group. Apart from superior ulnar deviation in the ORIF group (p = 0.0096), differences in the range of motion of the injured wrists were not significant. Similarly, there were no significant differences in grip strength and visual analog scale for pain. Volar tilt (p = 0.0399), radial height (p = 0.0087), radial inclination (p = 0.0051) and articular step-off (p = 0.0002) were all significantly superior in the ORIF group. There was a 37-fold difference in mean treatment costs between ORIF (SGD 7951.23) and nonoperative treatment (SGD 230.52). Our study shows no difference in overall functional outcomes at 12 months for closed displaced intra-articular distal radius fractures treated with either ORIF with volar locking plates or plaster cast immobilisation, and this is independent of radiographic outcome. A longer follow-up, nevertheless, is needed to determine whether the development of post-traumatic arthritis will have an effect on function. The vast difference in treatment costs should be taken into consideration when deciding on the treatment option. Level 3.

  6. The 2014 Iquique Chile earthquake: Preparatory breaking processes of a locked asperity and natural constraints for fluid migration along the plate interface

    Science.gov (United States)

    Moreno, M.; Li, S.; Angiboust, S.; Schurr, B.; Bedford, J. R.; Oncken, O.

    2015-12-01

    Variations in pore fluid pressure are of paramount importance in controlling fault stability. Recent studies have focused on investigating the underlying causes of pore fluid pressure, but natural constraints for lateral fluid migration have not yet been described. Here, we investigate the evolution of the plate interface kinematics and fluid pressure migration leading up to the Mw 8.1 Iquique earthquake. We present the deformation evolution of the last decade from a combination of ~40 continuous and ~70 survey-type GPS. The slip distribution of Iquique event covered areas that were previously intermediately to highly locked and enclosed by creeping interface zones. The seismicity recorded in the years before the mainshock tended to encircle the central locked patch (~40 km length asperity), which itself exhibited a low amount of seismicity. This earthquake was preceded by a series of foreshocks and transient deformation that was initiated by an Mw=6.7 event and which lasted for 16 days. The observed transient GPS signals can be explained by deformation due to foreshocks, indicating that slow slip was not a dominant factor in the stress build up that led to the mainshock. Foreshocks initiated at the edge of the asperity and migrated along the plate interface towards the mainshock hypocentre. The spatial and temporal proximity to the mainshock, as well as the migration pattern of events suggest that the foreshocks and mainshock were mechanically coupled. We suggest that the Mw 6.7 (that likely occurred on a splay fault) is responsible for a transient pore fluid pressure increase in the plate interface region, hence diminishing the effective normal stress on the interface. This segment of the plate interface, presumably mechanically weakened by near-lithostatic pore fluid pressures, was subsequently subjected to a propagation of foreshocks. We propose that the 16-days seismicity swarm could represent the lateral propagation of a fluid front through the place

  7. Hemiarthroplasty versus angle-stable locking compression plate osteosynthesis in the treatment of three- and four-part fractures of the proximal humerus in the elderly : design of a randomized controlled trial

    NARCIS (Netherlands)

    Verbeek, Paul A.; van den Akker-Scheek, Inge; Wendt, Klaus W.; Diercks, Ron L.

    2012-01-01

    Background: The optimal surgical management of dislocated three- and four-part fractures of the proximal humerus in elderly patients remains unclear. Most used techniques are hemiarthroplasty and angle-stable locking compression plate osteosynthesis. In the current literature there is no evidence av

  8. Orion锁定型颈椎前路钢板系统的临床应用%Clinical application of Orion anterior cervical locking plate system

    Institute of Scientific and Technical Information of China (English)

    郭澄水; 蒋学金; 陈新良; 韩国华; 孔祥飞

    2001-01-01

    Objective To evaluate the clinical application of Orion anterior cervical locking plate system in cervical injuries and cervical spondylous myelopathy. Methods 3 cervical spinal fractures and 2 cervical spondylous myelopathy were treated by anterior decompression, autografting and Orion plate fixation. Results 5 cases were followed up for 4~12 months. Bone graft was completely fused without complications of broken plate or loosening screw. Conclusion Orion plate can offer cervical stability after anterior decompression and bone grafting. It is easy to apply and suitable for the treatment of cervical fractures with spinal cord injuries.%目的探讨Orion锁定型颈椎前路钢板系统对颈椎骨折和脊髓型颈椎病手术固定的效果。方法对3例颈椎骨折合并高位截瘫和2例脊髓型颈椎病患者施行颈椎前路减压植骨融合及Orion钢板内固定。结果术后随访4~12个月,植骨已完全融合,无钢板断裂、螺钉松动等情况发生。结论 Orion锁定型颈椎前路钢板系统方法简单、容易掌握,内固定牢固,尤其适用于颈椎骨折伴高位截瘫患者的内固定治疗。

  9. Removal of H2S pollutant from gasifier syngas by a multistage dual-flow sieve plate column wet scrubber.

    Science.gov (United States)

    Kurella, Swamy; Bhukya, Pawan Kishan; Meikap, B C

    2017-05-12

    The objective of this study was to observe the performance of a lab-scale three-stage dual-flow sieve plate column scrubber for hydrogen sulfide (H2S) gas removal from a gas stream, in which the H2S concentration was similar to that of gasifier syngas. The tap water was used as scrubbing liquid. The gas and liquid were operated at flow rates in the range of 16.59 × 10(-4)-27.65 × 10(-4) Nm(3)/s and 20.649 × 10(-6)-48.183 × 10(-6) m(3)/s, respectively. The effects of gas and liquid flow rates on the percentage removal of H2S were studied at 50-300 ppm inlet concentrations of H2S. The increase in liquid flow rate, gas flow rate and inlet H2S concentration increased the percentage removal of H2S. The maximum of 78.88% removal of H2S was observed at 27.65 × 10(-4) Nm(3)/s gas flow rate and 48.183 × 10(-6) m(3)/s liquid flow rate for 300 ppm inlet concentration of H2S. A model has also been developed to predict the H2S gas removal by using the results from the experiments and adding the parameters that affect the scrubber's performance. The deviations between experimental and predicted H2S percentage removal values were observed as less than 16%.

  10. 重建锁定接骨钢板治疗肩胛骨骨折的临床效果观察%Observation of clinical effect by reconstruction locking plate in the treatment of scapular fracture

    Institute of Scientific and Technical Information of China (English)

    魏树刚

    2015-01-01

    ObjectiveTo research and analyze clinical effect by reconstruction locking plate in the treatment of scapular fracture.MethodsA total of 68 scapular fracture patients were randomly divided into reconstruction fixation group and locking fixation group, with 34 cases in each group. The reconstruction fixation group received reconstruction locking plate for treatment, and the locking fixation group received T-type locking titanium plate internal fixation. Curative effects of the two groups were recorded and compared.ResultsThe reconstruction fixation group had total effective rate as 97.06%, and the locking fixation group had that as 70.59%. The reconstruction fixation group had obviously higher total effective rate than the locking fixation group, and their difference had statistical significance (P<0.05).ConclusionReconstruction locking plate provides precise effect in treating scapular fracture, and it is worthy of clinical promotion.%目的:研究分析采用重建锁定接骨钢板技术治疗肩胛骨骨折的临床效果。方法68例肩胛骨骨折患者随机分为重建固定组和锁定固定组,各34例。其中重建固定组给予重建锁定接骨钢板治疗,锁定固定组给予T型锁定钛板内固定治疗,分别记录两组患者的治疗效果,并比较。结果重建固定组总有效率为97.06%,锁定固定组总有效率为70.59%,重建固定组总有效率明显高于锁定固定组,差异具有统计学意义(P<0.05)。结论重建锁定接骨钢板技术治疗肩胛骨骨折效果明显,值得临床推广。

  11. PULSE COLUMN

    Science.gov (United States)

    Grimmett, E.S.

    1964-01-01

    This patent covers a continuous countercurrent liquidsolids contactor column having a number of contactor states each comprising a perforated plate, a layer of balls, and a downcomer tube; a liquid-pulsing piston; and a solids discharger formed of a conical section at the bottom of the column, and a tubular extension on the lowest downcomer terminating in the conical section. Between the conical section and the downcomer extension is formed a small annular opening, through which solids fall coming through the perforated plate of the lowest contactor stage. This annular opening is small enough that the pressure drop thereacross is greater than the pressure drop upward through the lowest contactor stage. (AEC)

  12. 锁定加压钛板内固定治疗跟骨骨折%Application of locking compression plate in treatment of calcaneal fractures

    Institute of Scientific and Technical Information of China (English)

    董玉金; 童致虹; 张铁慧; 曾伟峰; 李靖年

    2013-01-01

    Objective To evaluate the clinical effect of the treatment for calcaneal fractures by locking compression plate.Methods From January 2008 to December 2011,30 patients with 40 calcaneal fractures were operated with locking compression plate.There were 25 males (33 feet) and 5 females (7 feet) with an average age of 44.8 years (range,22-60 years).Fifteen feet were on the left side,and 25 feet were on the right side.All patients had closed fractures,with complicated spinal injury in 2 patients.According to Sanders classification,20 feet were type Ⅱ[fractures,15 feet were type Ⅲ,and 5 feet were type Ⅳ.The lateral approach was adopted for all the patients in the treatment in which locking compression plate fixation was used but no external fixation.Early and suitable rehabilitation was carried out postoperatively.The patients could bear part of the loading six weeks after the operation and all the loading twelve weeks after the operation.The results were validated using the Anerican Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot scale.Results The patients were followed up for 8-20 months (average,12 months).Bone union occurred in all cases with roentgenographic evidence during 8-12 weeks postoperation (average,10 weeks).None of the patients had such complications as nerve injury or osteomyelitis.Incision dehiscence occurred in one case in which a little part of titanium plate and screw was exposed,but the incision was healed by dressing 1 month later.Two patients had subtalar arthritis and suffered from the pain while walking.Of the two patients,the pain was relieved for one after the operation of subtalar joint fusion,and the other was lost to the follow-up after he or she refused further treatment for economic reasons.According to AOFAS foot score standard,the effects of 20 cases were excellent,17 were good,and 3 were fair.The excellent and good rate was 92.5%.Conclusion The application of locking compression plate is an effective and satisfied

  13. Angular-stable locking plate fixation of tibial plateau fractures-clinical and radiological midterm results in 101 patients

    Directory of Open Access Journals (Sweden)

    Sven Mardian

    2015-01-01

    Full Text Available Background: Articular reconstruction and stable fixation of tibial plateau fractures and its various subtypes continue to represent a surgical challenge. Only few trials have studied results following angular stable plate fixation. The present study aimed to investigate the clinical, radiological, functional and quality of life results following tibial plateau fractures using angular stable plate fixation. Materials and Methods: 101 patients were retrospectively studied using functional (ROM; KSS; VAS, radiographic (osteoarthritis score, loss of reduction and quality of life (WOMAC; Lysholm scores. There were 46 males and 55 females. The average of patients was 51 years (range 22-77 years. Study groups were assigned according to the AO fracture classification. Results: Mean followup was 57 ± 30 months. Fracture type distribution revealed a significantly (P < 0.001 increased number of type B- (62.4% compared to C-fractures. Functional assessment showed a significantly better total KSS (84.1 ± 15.6 vs. 74.7 ± 18.0; P = 0.01 as well as ROM (active: 124°±17° vs. 116°±15°, P = 0.014; passive: 126°±18° vs. 118 ± 14°, P = 0.017 in the B-fracture group. VAS was found to be markedly higher (P = 0.0039 following type C-fractures. Rating osteoarthritis secondary to a tibial plateau fracture as a function of injury severity (r = 0.485; P < 0.001 and relating the loss of reduction to the grade of evolving osteoarthritis (r = 0.643;P < 0.001 a positive correlation was found. Quality of life showed significantly improved results for Lysholm score (P = 0.004 following B-fractures with low overall values for the WOMAC score. Conclusion: Presented data provide sufficient evidence that anatomic restoration of tibial plateau fractures with angular stable plate fixation result in decreased loss of reduction and declined incidence of posttraumatic osteoarthritis, thereby providing acceptable mid to long term outcome.

  14. The dynamic locking blade plate, a new implant for intracapsular hip fractures: biomechanical comparison with the sliding hip screw and Twin Hook.

    Science.gov (United States)

    Roerdink, W H; Aalsma, A M M; Nijenbanning, G; van Walsum, A D P

    2009-03-01

    Internal fixation of intracapsular hip fractures results in a high failure rate with non-union and avascular necrosis being the two most important complications. In order to prevent these possible complications treatment should consist of an anatomical reduction and stable fixation by insertion of a low volume, dynamic implant, providing angular and rotational stability to the femoral head. According to these principles a new implant, the dynamic locking blade plate (DLBP) was designed for the fixation of intracapsular hip fractures. We performed a biomechanical analysis in synthetic bone to compare the rotational stability and cut out resistance of the DLBP with a conventional sliding hip screw (SHS) and the more recently developed Twin Hook. The rotational stability of the DLBP proved to be three times higher than the rotational stability of a SHS and two times higher than the Twin Hook. There was no major difference in cut out resistance between the different implants. The design of the DLBP and possible advantages with regard to the healing of an intracapsular hip fracture are discussed.

  15. Analysis and Optimization of Locking Ring for Quick-opening Blind Plate Based on Ansys Workbench%基于Ansys Workbench的快开盲板锁环分析及优化

    Institute of Scientific and Technical Information of China (English)

    周天旭; 陈平; 陈水莲; 罗聪

    2013-01-01

    Ansys Workbench was used to optimize tilt angle of the locking ring in quick-opening blind plate so as to work out an optimum angle; and the relation curve between the locking ring size and the blind plate' s supporting was plotted,and the influence of locking ring size and tilt angle on the ring' s strength and stiffness was considered to propose details needing attention in the locking ring design.%利用Ansys Workbench对快开盲板锁环的倾斜角度进行了参数化设计,并优化出最佳角度.绘制出锁环尺寸对盲板支承状况和锁环应力的影响曲线.综合研究了锁环尺寸和倾斜角对锁环强度、刚度的影响,并提出了锁环设计中需要注意的细节.

  16. Interfacial area between gases and liquid in a valve plate column and a bubble cap tray; Barubu danto oyobi hosho danto ni okeru kieki sesshoku menseki

    Energy Technology Data Exchange (ETDEWEB)

    Nakoua, M.; Dribika, M.; Besher, E

    1999-03-05

    A mathematical model has been developed for absorption accompanied by chemical reaction of H{sub 2}S and CO{sub 2} in alkanolamine solutions encountered in plants for natural gas sweetening in Libya. The model has been used to calculate actual number of plates in industrial columns. The model results errors in number of trays predictions due to the lack of procedures for estimating interfacial area for the in between flow regime that prevailed in two industrial plants. The developed correlation for interfacial area estimation for the in between flow regime gives zero error in number of trays prediction. (author)

  17. 肱骨近端锁定钢板治疗难复性肱骨近端骨折脱位18例体会%Treatment of irreducible proximal humerus fracture and dislocation with locking proximal humerus plate

    Institute of Scientific and Technical Information of China (English)

    沈爱东; 孙惠清; 杨惠光

    2010-01-01

    对肱骨近端锁定钢板(locking proximal humerus plate,LPHP)内固定治疗难复性肱骨近端骨折脱位临床资料进行回顾性分析.18例经7~12个月随访,骨折全部愈合.随访期间未发现肱骨头坏死病例.

  18. Fractures and fracture-dislocations of the proximal humerus: A retrospective analysis of 82 cases treated with the Philos(®) locking plate.

    Science.gov (United States)

    Erasmo, Rocco; Guerra, Giovanni; Guerra, Luigi

    2014-12-01

    To present the experience in a single institution of the management of 82 consecutive fractures and fracture-dislocations of the proximal humerus treated with the Proximal Humeral Internal Locking System (Philos(®)) plate. A total of 81 patients with 82 proximal humerus fractures (one patient had bilateral fracture) were treated at our institution with open reduction and internal fixation with Philos(®) plate from January 2008 to December 2012 and the clinico-radiological outcome was analysed. Twelve of these patients also had a dislocation of the proximal humerus. According to the Neer classification, there were seven two-part fractures, 40 three-part fractures and 35 four-part fractures. All patients received a similar physical therapy programme following internal fixation. Mean final follow-up was 32 months. Functional outcome was evaluated for each patient using the Constant-Murley score; radiographic evaluation was also conducted and complications were recorded. At the end of the follow-up period, the mean Constant-Murley score for the injured side was 75 points (range 42-92); results were graded as excellent for eight patients, good for 52, moderate for 17 and poor for five. Twenty-three patients (28%) had complications during the follow-up period. Reoperation was required in 12 patients. Complications included avascular necrosis of the humeral head in 10 patients (12%), varus positioning of the head in four patients (4.8%), impingement syndrome in three patients (3.6%), secondary screw perforation in three patients (3.6%), non-union of the fracture in two patients (2.4%) and infection in one patient (1.2%). Open reduction and internal fixation of proximal humeral fractures with the Philos(®) plate was associated with good clinical outcomes provided the correct surgical technique was used. To better evaluate the real incidence of complications, it is important to follow patients for more than one year after surgery as some complications may arise after

  19. In vitro biomechanical comparison of a 4.5 mm narrow locking compression plate construct versus a 4.5 mm limited contact dynamic compression plate construct for arthrodesis of the equine proximal interphalangeal joint.

    Science.gov (United States)

    Ahern, Benjamin J; Showalter, Brent L; Elliott, Dawn M; Richardson, Dean W; Getman, Liberty M

    2013-04-01

    To compare the in vitro biomechanical properties of a 4.5 mm narrow locking compression plate (PIP-LCP) with 2 abaxially located transarticular screws and a 4.5 mm limited contact dynamic compression plate (LC-DCP) with 2 abaxially located transarticular screws using equine pasterns. Experimental. Paired in vitro biomechanical testing of 2 methods for stabilizing adult equine forelimb PIP joints. Adult equine forelimbs (n = 8 pairs). Each pair of PIP joints were randomly instrumented with either a PIP-LCP or LC-DCP plate axially and 2 parasagitally positioned 5.5 mm transarticular screws. The proximal aspect of the proximal phalanx (P1) and the distal aspect of the middle phalanx (P2) were embedded to allow for mounting on a mechanical testing machine. Each construct was tested in both cyclic and subsequently single cycle to failure in 4-point bending. The displacement required to maintain a target load of 1 kN over 3600 cycles at 1 Hz was recorded. Maximum bending moment at failure and construct stiffness was calculated from the single cycle to failure testing. In cyclic testing, significantly more displacement occurred in the LC-DCP (0.46 ± 0.10 mm) than for the PIP-LCP (0.17 ± 0.11 mm) constructs (P = .016). During single cycle testing there was no significant difference in the bending moment between the LC-DCP (148.7 ± 19.4 N m) and the PIP-LCP (164.6 ± 17.6 N m) constructs (P = .553) and the stiffness of the LC-DCP (183.9 ± 26.9 N mm) was significantly lower than for the PIP-LCP (279.8 ± 15.9 N/mm) constructs (P = .011). All constructs failed by fracture of the bone associated with the transarticular screws and subsequently bending of the plates at the middle hole. Use of the PIP-LCP resulted in a stiffer construct of the same strength as the LC-DCP in vitro using this 4-point bending model. © Copyright 2013 by The American College of Veterinary Surgeons.

  20. 股骨近端外侧锁定钢板治疗Russell-Taylor Ⅱ型股骨转子下骨折%Femoral subtrochanteric fractures treated with proximal lateral femur locking Plate

    Institute of Scientific and Technical Information of China (English)

    胡孙君; 陈舰; 陈杰; 俞光荣; 张世民

    2012-01-01

    目的 探讨股骨近端外侧锁定钢板治疗股骨转子下骨折的治疗效果.方法 对28例Russell-Taylor Ⅱ型股骨转子下骨折患者采用股骨近端外侧锁定钢板固定.结果 28例均获得随访,时间10~24个月.根据髋关节Harris评分:优13例,良10例,中5例.结论 股骨近端外侧锁定钢板治疗股骨转子下骨折可以达到可靠的固定效果,骨折愈合较快,短期临床疗效良好.%Objective To study the outcome of subtrochanteric hip fractures treated by proximal lateral femur locking plate. Methods 28 elder patients with subtrochanteric hip fractures were treated with proximal lateral femur locking plate. Results All patients were followed up for 10 ~24 months. According to Hams index, there were 13 excellent cases, f 0 good and 5 fair. Conclusions The proximal lateral femur locking plate is the kind of stable and effective internal fixation of treating subtrochanteric hip fractures, and the clinical outcome is satisfied.

  1. 锁定加压钢板治疗骨折术后骨不连20例效果分析%Effect analysis of locking compression plate in the treatment of nonunion after fracture operation in 20 cases

    Institute of Scientific and Technical Information of China (English)

    曾雪松

    2016-01-01

    目的:观察使用锁定加压钢板(LCP)治疗20例骨折术后骨不连的临床效果。方法:对20例骨折术后骨不连患者给予锁定加压钢板方法治疗,观察疗效。结果:愈合率90.0%,平均愈合时间(7.2±0.3)个月。结论:使用锁定加压钢板治疗骨折术后骨不连的临床效果较好。%Objective:To observe the clinical effect of using locking compression plate in the treatment of nonunion after fracture operation in 20 cases.Methods:20 patients with nonunion after fracture operation were given locking compression plate method treatment.The curative effect was observed.Results:The healing rate was 90.0% ,and the average healing time was (7.2 ± 0.3) months.Conclusion:The clinical effect of using locking compression plate in the treatment of nonunion after fracture operation is better.

  2. PLATE

    DEFF Research Database (Denmark)

    Kling, Joyce; Hjulmand, Lise-Lotte

    2008-01-01

    ’s level of English is sufficient for the increasing number of courses offered in English each semester. This paper addresses these concerns and describes a pilot project initiated in 2003 at CBS to gauge the overall English language proficiency of those teaching content courses in English. Through......Copenhagen Business School (CBS) finds itself needing to address the issue of English-medium instruction for its increasing number of foreign exchange and full degree students. With internationalisation as a main pillar of the institution’s agenda, there are concerns whether the teaching faculty...... the Project in Language Assessment for Teaching in English (PLATE) language professionals from CBS’s Language Center observe teachers and provide feedback using evaluation criteria from the Common European Framework for Reference (CEFR) supplemented by some additional criteria which take the LSP nature...

  3. PLATE

    DEFF Research Database (Denmark)

    Kling, Joyce; Hjulmand, Lise-Lotte

    2008-01-01

    Copenhagen Business School (CBS) finds itself needing to address the issue of English-medium instruction for its increasing number of foreign exchange and full degree students. With internationalisation as a main pillar of the institution’s agenda, there are concerns whether the teaching faculty......’s level of English is sufficient for the increasing number of courses offered in English each semester. This paper addresses these concerns and describes a pilot project initiated in 2003 at CBS to gauge the overall English language proficiency of those teaching content courses in English. Through...... the Project in Language Assessment for Teaching in English (PLATE) language professionals from CBS’s Language Center observe teachers and provide feedback using evaluation criteria from the Common European Framework for Reference (CEFR) supplemented by some additional criteria which take the LSP nature...

  4. 锁定加压钢板与DHS治疗股骨转子间骨折的对比研究%Comparative study of treatment of the femoral intertrochanteric fractures with locking compression Plate and DHS

    Institute of Scientific and Technical Information of China (English)

    罗福昌; 彭建强; 蔡汉周; 周经颖; 李中檀

    2008-01-01

    目的 探讨锁定加压钢板与DHS治疗股骨转子间骨折的疗效及适应证.方法 使用锁定加压钢板与DHS治疗股骨转子间骨折共102例,并对其在手术时间、术中出血量、术后引流、Parker髋关节功能评分、并发症等方而进行比较.结果 锁定加压钢板组在手术时间、手术期出血量、术后切口引流量、并发症等均较DHS组少,DHS组早期活动和负重时间明显早于锁定加压钢板组.结论 锁定加压钢板治疗股骨转子间骨折适用于所有类型的股骨转子间骨折,对于骨质疏松、粉碎性骨折患者尤为适合.DHS治疗股骨转子间骨折具有固定可靠、患者可早期活动和负重的优点,适用于Ⅰ、Ⅱ型股骨转子间骨折.%Objective To evaluate the effect and indications in the treatment of the femoral intertro-chanteric fractures with locking compression plate add DHS. Methods Treated femoral intertrochanteric fractures with locking compression plate and DHS for 102 cases at the same period, and its operation time, blood loss,the drainage volum,Parkerhip function score,complication in the 2 groups were compared. Results The group of locking compression plate in the blood loss, operation time, complication and the drainage volum were less than the group of DHS,the group of DHS in the early activities were more early than the group of locking compression plate. Conclusion Treatment of the femoral intertrochantefic fractures with locking compression plate is suitable treatment for all types of femoral intertroehanterie fractures, which is especially suitable treatment for the syntripsis and osteoporosis. Treatment of the femoral intertrochanteric fractures with DHS has the advantages of reliable fixation and early activities,which is suitable treatment for the types of Ⅰ and Ⅱ.

  5. Comparison of Locking Plate and PFNA for Intertrochanteric Fractures%锁定钢板与PFNA治疗股骨粗隆间骨折的对比分析

    Institute of Scientific and Technical Information of China (English)

    刘国龙; 窦庆寅; 韩同坤; 阳闽军

    2011-01-01

    Objective To compare the clinical effects of locking plate and PFNA in the treatment of intertrochanteric fractures. Methods A total of 138 cases of intertrochanteric fractures were treated with anatomical proximal femoral locking plate (locking plate group, n = 63) and modified proximal femoral intramedullary nails (PFNA group,n= 75) according to age and modified Evans classification. Perioperative indicators and degree of functional recovery of hip after surgery were compared between the two groups. Results All patients were followed up for 7-36 months. There were significant differences in cut size, amount of bleeding, reduction of neck shaft angle,and average healing time between locking plate group and PFNA group (P<0.05), but the differences in operation time and postoperative hip function were not significant between the two groups (P>0. 05). Conclusion PFNA is a better choice than proximal femoral anatomical locking plate in the treatment of intertrochanteric fractures due to smaller incisions,less blood loss and shorter time in bed.%目的 比较锁定钢板与改良股骨近端加锁髓内钉(PFNA)2种内固定方式治疗股骨粗隆间骨折的临床疗效.方法 根据不同年龄段和骨折分型,对138例股骨粗隆间骨折患者分别采用股骨近端解剖型锁定钢板(解剖型锁定钢板组,n=63)及PFNA(PFNA组,n=75)进行内固定.对2组围术期指标和术后髋关节功能恢复程度进行比较.结果 2组患者均获随访7~36个月.2组切口大小、出血量、颈干角减少、平均愈合时间比较,差异有统计学意义(P<0.05).2组骨折手术时间、术后髋关节功能比较,差异无统计学意义(P>0.05).结论 2种内固定方法 临床效果相当,但与股骨近端解剖型锁定钢板比较,PFNA创伤小、出血量少、卧床时间短.

  6. 锁定解剖钢板内固定治疗股骨转子间骨折%Treatment of trochanteric fractures with proximal femoral locking plates

    Institute of Scientific and Technical Information of China (English)

    徐荣华; 霍维玲; 吴昊; 陈明

    2011-01-01

    目的 探讨锁定解剖钢板内固定治疗股骨转子间骨折的临床疗效.方法 应用有限切开锁定解剖钢板内固定治疗股骨转子间骨折56例.结果 56例均获随访,时间3~24个月.全部骨性愈合,愈合时间3~6个月.有2例发生髋内翻,无骨不连、内固定断裂等并发症发生.结论 锁定解剖钢板治疗股骨转子间骨折切口小,手术时间短,出血量少,术后可早期功能锻炼,并发症少,尤其适用于老年骨质疏松患者.%Objective To investigate the clinical and radiographic results of proximal femoral locking plates( PFLPs ) for a minimally invasive method of treating intertrochanteric hip fractures.Methods A total of 56 patients with inter-trochanteric hip fractures were treated by limited open reduction and fixation with PFLPs.Results All the cases were followed up for 3 ~ 24 months and they all got bony union in 3 ~ 6 months.Coxa vara was found in 2 cases.No infection , pseudoarthrosis or implant failure was recorded.Conclusions PFLPs for intertrochanteric fractures is benificial for earlier functional exercise, shortening operating times, diminishing operating wound, less blood loss and little postoperative complications.It is especially of benefit to the old man with severe osteoporosis.

  7. A CLINICAL STUDY OF PROXIMAL FEMUR LOCKING COMPRESSION PLATE (LCP - PF IN THE MANAGEMENT OF COMMUNITED INTERTROCHANTERIC AND SUBTROCHANTERIC FRACTURES OF THE FEMUR

    Directory of Open Access Journals (Sweden)

    Hari Babu

    2015-10-01

    Full Text Available Fractures of proximal femur and hip are relatively common injuries in elderly individuals . The incidence of peritrochanteric and intertrochanteric fracture is also increasing among young population, who sustain high energy trauma Rigid Internal fixation and early mobilization has been the standard method of treatment. A combination of orthopaedic surgery and early postoperative physiotherapy and ambulation is the best approach. The overall goal in the treatment of hip fractures is to return the patient to pre - morbid level of function. AIMS & OBJECTIVE : To analyse the anatomical and f unctional outcome of the treatment with LCP - Proximal femur. METHODOLOGY : The present study consists of 12 adult patients of peritrochanteric factures of femur satisfying the inclusion criteria , treated with Proximal Femoral Locking Compression Plate at S. V. R. R . Govt . General Hospital, Tirupati during the period of nov 2013 to Oct 2015. INCLUSION CRITERIA : Age >18years , comminuted trochanteric and sub trochanteric fractures , Signed written informed consent . EXCLUSION CRITERIA: Inter trochanteric fractures involving piriformis fossa , Compound fractures . Pathological fractures . Any displacement of a femoral neck fracture . A ssociated malignancy. RESULTS : Average age incidence in the present study was 62.7 years. , Predominantly males (75% were affected. , Most cases occurred after a fall 10 (50% cases which was statistically significant , Right side involvement was more common. , Average post - operative stay was 13.5 days. , Out of the 12 cases, evaluated using Salvati - Wilson scoring : 3 cases (25% had good, 8 cases (66.67% fair, 1 case (8.33% had poor score , Average weight bearing time was14.5 weeks , Average union rate was 19.45 weeks.

  8. Biomechanical Study of Acetabunlum Transverse and Posterior Wall Fractures Treated by Internal Fixation with Locking Reconstruction Plate%锁定重建接骨板治疗髋臼横行伴后壁骨折的生物力学研究

    Institute of Scientific and Technical Information of China (English)

    付久洋; 吴啸波

    2015-01-01

    Objective To evaluate the stability of 3 different internal fixation methods for transverse and posterior wall fractures of the acetabulum. Methods Seighteen acetabula of 9 whole pelvises were divided into 3 groups randomly. Models of transverse and posterior wall fracturesof acetabulum were established and then fixed with one of following three internal fixation methods:(Group A)posterior column locking reconstruction plate group,(Group B)posterior column common reconstruction plate withposterior wall 2 lag screwsgroup ,(Group C)anterior column lag screw and posterior column common reconstruction plate with posterior wall2 lag screws group. biomechanical tests are conducted in a single leg stance tomeasurethe maximal loads in the three groups and the displacements of the posterior wall fractures when the stress were loaded to 2 200 N on the three groups. Results The maximal loads in Groups A,B,C were as follows:(2243. 74 ± 116. 36)N,(2769. 05 ± 131. 42) N,(2832. 87 ± 137. 93)N. When the stress was loaded to 2 200 N on the three groups,the displacements of the posterior wall fractures were as follows:(2. 15 ± 0. 26)mm,(0. 45 ± 0. 05)mm,(0. 53 ± 0. 07)mm. We found there was no significant difference between the Group B and the Group C(P > 0. 05). There was significant difference between Groups B,C and Groups A,(P 0.05)。B、C 两组数据与 A 组比较,差异均有统计学意义(P <0.05,P <0.01)。结论锁定重建接骨板固定髋臼横行伴后壁骨折固定可靠,能够满足患者早期功能锻炼的要求,具有较大临床应用价值。

  9. SPIRAL CONTACTOR FOR SOLVENT EXTRACTION COLUMN

    Science.gov (United States)

    Cooley, C.R.

    1961-06-13

    The patented extraction apparatus includes a column, perforated plates extending across the column, liquid pulse means connected to the column, and an imperforate spiral ribbon along the length of the column.

  10. Performance of a New Beam-Column and Concrete-filled Steel Tubular Column-Flat Plate Composite Structure%新型梁柱-钢管混凝土板柱混合结构试验研究

    Institute of Scientific and Technical Information of China (English)

    张玉敏; 苏幼坡; 苏经宇

    2013-01-01

    The new beam-column and concrete-filled steel tubular column-flat plate composite structure is characterized by the joint with dedicated connection device ( hinged connection) between steel columns and concrete slab. The nodes bear only vertical loads while the horizontal loads are born by the shear wall and beam-column frame, and the unbalanced moment in the joint should be very small even naught to avoid the punching damage of slab when an earthquake occurs. The new structure is different from the general frame-shear wall or slab-column structure, therefore the experiment should be implemented to study the performance of the floor system. Through a model test of concrete filled steel tubular (CFST) column-flat plate structure (inter-cross with less than 3) with 1/2-scale, the mechanical performance should be studied under vertical uniform and horizontal loads. Results show that the bearing capacity of the floor system with high security reserves is 2 times higher than the vertical design load; the relative displacement of the joint can achieve 2. 25 % of storey height that is two times more of a frame structure's story drift limit in Code for Seismic Design of Building Structure before the specimens were destroyed even in high ratio of shearing force from the weight of superstructure and punching shear capacity of slabs (gravity shear ratio, GSR >0. 8) . The seismic behavior exceeds ordinary flat floor slab.%新型梁柱-钢管混凝土板柱混合结构的特点是钢管混凝土柱-板节点处只承担竖向荷载,不出现或者出现较小的不平衡弯矩,同时提高节点抗侧移能力,避免地震时楼板发生冲切破坏,水平荷载则全部由抗震墙和梁柱框架承担.通过1个1/2比例钢筋混凝土梁柱-钢管混凝土柱无梁楼盖异型板(跨数少于3跨)结构模型试验,研究其在受竖向均布荷载和水平荷载作用下结构的受力性能.试验结果表明,楼盖系统的竖向承载力超出设计荷载的2倍以上,

  11. 颈椎前路锁定钢板治疗颈椎疾病的疗效观察%Effectiveness of Anterior Cervical Locking Plate System in Cervical Surgery

    Institute of Scientific and Technical Information of China (English)

    任云峰; 熊鹰; 赵烽; 张仲子

    2011-01-01

    目的 观察颈椎前路减压、取髂骨植骨结合锁定型钢板系统内固定治疗颈椎疾病的临床疗效.方法 2001年3月至2008年3月采用该方法治疗颈椎疾病34例,并进行12 ~24个月后随访.结果 术前Frankel分级A-D级31例中,25例有1 ~2级的改善,6例无明显改善.植骨块融合良好,无严重并发症发生.结论 该方法具有固定牢靠、植骨融合率高、手术操作简单、手术并发症少等优点,是一种治疗颈椎疾病的良好方法.%Objective To evaluate the effectiveness of anterior decompression, bone grafting combined with locking plate system internal fixation for cervical spinal desease.Methods From March 2001 to March 2008 34 patients were operated with anterior decompression, bone grafting and locking plate system fixation, all the patients were followed up for 12 to 24 months.Results 25 patients of Frankel's A-D were improved by to 2 degree after operation,6 patients had no obvious improvement.There was no plate or screw breaking and loosening; no dislocation of graft bone, all the bones were fusion in 6 months.Conclusion Anterior decompression , bone grafting combined with locking plate system internal fixation can provide reliable stability for the fixation segments with higher bony fusion rate,less complications,and the operation was much simple and safe.It was a good choice for treatment of cervical spinal disease.

  12. UK DRAFFT - A randomised controlled trial of percutaneous fixation with kirschner wires versus volar locking-plate fixation in the treatment of adult patients with a dorsally displaced fracture of the distal radius

    Directory of Open Access Journals (Sweden)

    Brown Jaclyn

    2011-09-01

    Full Text Available Abstract Background Fractures of the distal radius are extremely common injuries in adults. However, the optimal management remains controversial. In general, fractures of the distal radius are treated non-operatively if the bone fragments can be held in anatomical alignment by a plaster cast or orthotic. However, if this is not possible, then operative fixation is required. There are several operative options but the two most common in the UK, are Kirschner-wire fixation (K-wires and volar plate fixation using fixed-angle screws (locking-plates. The primary aim of this trial is to determine if there is a difference in the Patient-Reported Wrist Evaluation one year following K-wire fixation versus locking-plate fixation for adult patients with a dorsally-displaced fracture of the distal radius. Methods/design All adult patients with an acute, dorsally-displaced fracture of the distal radius, requiring operative fixation are potentially eligible to take part in this study. A total of 390 consenting patients will be randomly allocated to either K-wire fixation or locking-plate fixation. The surgery will be performed in trauma units across the UK using the preferred technique of the treating surgeon. Data regarding wrist function, quality of life, complications and costs will be collected at six weeks and three, six and twelve months following the injury. The primary outcome measure will be wrist function with a parallel economic analysis. Discussion This pragmatic, multi-centre trial is due to deliver results in December 2013. Trial registration Current Controlled Trials ISRCTN31379280 UKCRN portfolio ID 8956

  13. The model of back-flow mixed tanks-in-series used for representing the liquid flow in a reciprocating plate column

    Directory of Open Access Journals (Sweden)

    Nikolić Ljubiša B.

    2003-01-01

    Full Text Available The influence of different working parameters (vibration intensity superficial gas and liquid rate and content of the solid phase on liquid flow in a multiphase (gas-liquid: RPC-II and gas-liquid-solid: RPC-III reciprocating plate column was analyzed using step-response methods and sorbic acid as a tracer. The liquid flow was determined using a model of N-tanks in series followed by back mixing of the liquid phase between the tanks. The parameters of this model N, a and x were calculated by applying several methods: calculation of the moments of the residence time distribution function for a constant number of tanks in series (N=const analysis of a set of linear equations for N *const and determination of the minimum of defined goal function using the optimization technique leastsq.m of MATLAB software.

  14. Axial dispersion, holdup and slip velocity of dispersed phase in a pulsed sieve plate extraction column by radiotracer residence time distribution analysis

    Energy Technology Data Exchange (ETDEWEB)

    Din, Ghiyas Ud [Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), P.O. Nilore, Islamabad (Pakistan); Isotope Applications Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), P.O. Nilore, Islamabad (Pakistan)], E-mail: fac192@pieas.edu.pk; Chughtai, Imran Rafiq; Inayat, Mansoor Hameed [Department of Chemical and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), P.O. Nilore, Islamabad (Pakistan); Khan, Iqbal Hussain [Isotope Applications Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), P.O. Nilore, Islamabad (Pakistan)

    2008-12-15

    Axial dispersion, holdup and slip velocity of dispersed phase have been investigated for a range of dispersed and continuous phase superficial velocities in a pulsed sieve plate extraction column using radiotracer residence time distribution (RTD) analysis. Axial dispersion model (ADM) was used to simulate the hydrodynamics of the system. It has been observed that increase in dispersed phase superficial velocity results in a decrease in its axial dispersion and increase in its slip velocity while its holdup increases till a maximum asymptotic value is achieved. An increase in superficial velocity of continuous phase increases the axial dispersion and holdup of dispersed phase until a maximum value is obtained, while slip velocity of dispersed phase is found to decrease in the beginning and then it increases with increase in superficial velocity of continuous phase.

  15. Clinical analysis of humerus surgical neck fracture treated with locking proximal humerus plate%锁定钢板治疗肱骨外科颈骨折36例分析

    Institute of Scientific and Technical Information of China (English)

    袁展程

    2012-01-01

    Objective To study on the therapeutic effect of humerus surgical neck fracture treated with locking proximal humerus plate. Methods There were 36 cases of humerus surgical neck fracture were treated by locking proximal humerus plate. According to Neer classification, 6 cases had two -part fracture. 23 cases had three-part fracture and 7 cases four-part fracture. The function of shoulders was evaluated after treatment. Results According to the NEER criteria,the results were excellent in 19 cases, good in 12 cases, fair in 5 cases. The rate of excellent and good was 86. 1%. Conclusion Treatment of humerus surgical neck fracture with locking proximal humerus plate has stable internal fixation and less complications, bone fracture heals good. It can take functional exercise earlier.%目的 探讨锁定钢板治疗肱骨外科颈骨折的疗效.方法 应用肱骨近端锁定钢板治疗肱骨外科颈骨折36例,其中Neer分类二部分骨折6倒,三部分骨折23例,四部分骨折7例.治疗后评价肩关节功能.结果 术后所有患者随访4~12个月,按Neer评分标准判断:优19倒,良12例,可5例.总优良率为86.1%.结论 锁定钢板治疗肱骨外科颈骨折,内固定牢靠,骨折愈合良好,可早期功能锻炼,术后无严重并发症,是目前比较理想的治疗方法.

  16. 解剖型锁定钢板外固定治疗锁骨骨髓炎%Usage of anatomic locking plate as an external fixator for the treatment of clavicular osteomyelitis

    Institute of Scientific and Technical Information of China (English)

    叶文斌; 翟文亮; 丁真奇

    2011-01-01

    目的 探讨解剖型锁定钢板治疗锁骨骨髓炎的效果.方法 对14例锁骨骨髓炎患者进行病灶清除、灌洗,解剖型锁定钢板外固定治疗.根据ASES系统对肩关节功能进行综合评价.结果 14例均获随访,时间6~23(10±2.5)个月.均获得良好的愈合.肩关节功能评分平均为91.3分±3.2分.结论 解剖型锁定钢板可提供良好的外固定,用于锁骨骨髓炎病灶清除后固定确实、可行.%Objective To evaluate the effects of anatomic locking plate as an external fixator for the treatment of clavicular osteomyelitis.Methods 14 patients who had clavicular osteomyelitis and partially bone defect were treated by focus clearance and locking plate external fixation.At the last follow up, the shoulder function was evaluated according to the ASES system.Results Each of 14 patients ohtained healing, and was followed up for 6 ~ 23 months on average of( 10 ±2.5 ) months.and the average ASES score was ( 91.3 ±3.2 ).Conclusions It proves an excellent way hy using of anatomic locking plate as external fixation for clavicle osteomyelitis.

  17. 多轴锁定钢板内固定治疗复杂胫骨平台骨折临床观察%Clinical observation of multiaxis locking plate on treating complex tibial plateau fractures

    Institute of Scientific and Technical Information of China (English)

    周志华; 王修卓; 杨新

    2013-01-01

    Objective To explore multiaxis locking plate in the treatment of complex tibial plateau fractures fixed treatment effect. Methods 24 cases of complex fracture of tibial plateau were treated using multiaxis locking plate. Results 24 cases have been followed-up period was average of 12 months. (ranging from 6 months to 24 months), an According to Merchant score standard evaluation of knee joint function, excellent in 4 cases (16.6%), good in12 cases (50%),pretty good in 6 (25%) points, poor in 2 (8.4%). Conclusion Multiple spindle locking plate fixed in treatment of complex fracture of tibial plateau is widely used, the more stable after fixed, less postoperative complications, and is a good choice.%  目的探讨多轴锁定钢板内固定治疗复杂胫骨平台骨折的治疗效果。方法24例胫骨平台骨折患者采用多轴锁定钢板内固定治疗。结果24例均获随访,时间6个月~24个月,平均12个月。按Merchant评分标准评价膝关节功能,优4例(16.6%),良12例(50%),中6例(25%),差2例(8.4%)。结论多轴锁定钢板内固定治疗复杂胫骨平台骨折适用范围广,固定稳固,预后好,术后并发症少,可以作为复杂胫骨平台骨折的较佳治疗选择。

  18. Proximal femoral locking plate treatment of intertrochanteric fractures in older adults%股骨近端锁定板治疗老年人股骨粗隆间骨折

    Institute of Scientific and Technical Information of China (English)

    田学林; 朱冬承

    2014-01-01

    目的:探讨股骨近端锁定板治疗老年人股骨粗隆间骨折的疗效。方法选取我院老年人股骨粗隆间骨折患者88例为研究对象,对照组采取常规内固定,观察组采取股骨近端锁定板内固定,比较两组疗效。结果观察组治疗总有效率为95.45%;对照组治疗总有效率为68.18%。结论股骨近端锁定板治疗老年人股骨粗隆间骨折具有很好的临床效果,能有效促进患者恢复,提高其生活质量。%Objective To explore the proximal femoral locking plate curative effect for the treatment of intertrochanteric fractures in older adults. Methods Selected from 88 cases of patients with intertrochanteric fractures in older adults as the research object,control group,take regular internal fixation group take the proximal femoral locking plate internal fixation,compared two groups of therapeutic effect. Results Observation treatment group the total effective rate was 95.45%; The control group total effective rate was 68.18%. Conclusion Proximal femoral locking plate treatment of intertrochanteric fractures in older adults have very good clinical effect,can effectively promote the patient recover,improve the quality of life.

  19. Clinical efficacy of locking compression plate fixation in treatment of femoral intertrochanteric fracture%锁定加压钢板治疗股骨转子间骨折21例临床分析

    Institute of Scientific and Technical Information of China (English)

    杨岭; 聂磊; 孙湖山

    2012-01-01

    Objective: To investigate the effects of locking compression plate fixation in treatment of intertrochanteric fracture. Methods: Twenty-one cases with femoral intertrochanteric fracture were treated with locking compression plate fixation. Results: The fractures of all cases were recovered after 3-6 months. The complications of nails breakage and internal fixation loosening were not found. The function recovery of hip joint were good and no clear lower limb shortening deformity. Excellent and good effects in 13 and 8 cases were confirmed according to Harris standard. Conclusions: Treatmment of femoral intertrochanteric fracture with locking compression plate fixation is easy to install and fix, which is an effective method of operation with shorter operative time, less bleeding and goog hip joint function recovery.%目的:观察锁定加压钢板治疗股骨转子间骨折的疗效.方法:应用锁定加压钢板治疗股骨转子间骨折21例.结果:21例患者3~ 6个月骨折均愈合,未出现断钉、内固定松动等并发症,无明显髋内翻和下肢短缩畸形;Harris评分为优11例,良8例,可2例.结论:锁定加压钢板治疗股骨转子间骨折具有容易安装、固定可靠、手术时间短、出血量少、髋关节功能恢复优良率高等特点,是一种有效的手术方法.

  20. 建立锁骨个性化锁定接骨板模型及有限元分析%Establishment of personalized locking clavicle plate model and finite element analysis

    Institute of Scientific and Technical Information of China (English)

    尹峰; 王晓东; 梁炜; 任龙韬

    2016-01-01

    BACKGROUND:The finite element analysis method is more accurate and fast to construct the three-dimensional model of the human skeleton and design the bone surgical medical instrument. OBJECTIVE:To establish locking plate model according to the clavicle model, analyze and evaluate stress distribution of locking plate of the finite element model under bending and torsion conditions. METHODS:Chest scan was carried out in a healthy young adult male by adopting 64-row spiral CT and his two-dimensional image data were gotten. The obtained data were analyzed with Mimics 10.0 software to establish the three-dimensional clavicle finite element model. The clavicle locking fixation plate model was established by applying the UG software. The locking fixation plate was evaluated by utilizing the abaqus software when the plate was bent while down to give force of 200 N, and twisted while 200 N•mm, to simulate the force and analyze the stress distribution of the locking plate. RESULTS AND CONCLUSION:Based on the original image parameters provided by CT, this experiment produced a three-dimensional model of the clavical titanium plate which fitted better to bones. This model can obtain a single individual, personalized plate by three-dimensional printing technology. The finite element analysis basical y can simulate the actual stress of the plate. For straight plate and“S”-shape plate, in lateral bending and axial torsion loads, the maximum stress distribution of the seven-hole titanium plate is located in the center of the center hole. During actual surgical procedures, clavicle fracture fragments and middle locking hole had stress superposition. If the titanium plate can avoid the stress concentration, it can effectively avoid the occurrence of the broken plate after implantation, provide theoretical guidance for clinical practice, and provide reference and technical route for biomechanical analysis of other types of titanium plate.%背景:应用有限元分析的方

  1. Hemiarthroplasty versus angle-stable locking compression plate osteosynthesis in the treatment of three- and four-part fractures of the proximal humerus in the elderly: design of a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Verbeek Paul A

    2012-02-01

    Full Text Available Abstract Background The optimal surgical management of dislocated three- and four-part fractures of the proximal humerus in elderly patients remains unclear. Most used techniques are hemiarthroplasty and angle-stable locking compression plate osteosynthesis. In the current literature there is no evidence available presenting superior results between hemiarthroplasty and angle-stable locking compression plate osteosynthesis in terms of speed of recovery, pain, patient satisfaction, functional outcome, quality of life or complications. Methods/Design A randomized controlled multicenter trial will be conducted. Patients older than 60 years of age with a dislocated three- or four-part fracture of the proximal humerus as diagnosed by X-rays and CT-scans will be included. Exclusion criteria are a fracture older than 14 days, multiple comorbidity, multitrauma, a pathological fracture, previous surgery on the injured shoulder, severely deranged function caused by a previous disease, "head-split" proximal humerus fracture and unwillingness or inability to follow instructions. Participants will be randomized between surgical treatment with hemiarthroplasty and angle-stable locking compression plate osteosynthesis. Measurements will take place preoperatively and 3 months, 6 months, 9 months, 12 months and 24 months postoperatively. Primary outcome measure is speed of recovery of functional capacity of the affected upper limb using the Disabilities of Arm, Shoulder and Hand score (DASH. Secondary outcome measures are pain, patient satisfaction, shoulder function, quality of life, radiological evaluation and complications. Data will be analyzed on an intention-to-treat basis, using univariate and multivariate analyses. Discussion Both hemiarthroplasty and angle-stable locking compression plate osteosynthesis are used in the current treatment of dislocated three-and four-part fractures of the proximal humerus. There is a lack of level-1 studies comparing

  2. Clinical Comparison of Locking Proximal Humerus Plate and Conventional Plate in Treatment of Proximal Humerus Fractures%肱骨近端加压锁定钢板与传统钢板治疗肱骨近端骨折的疗效比较

    Institute of Scientific and Technical Information of China (English)

    孙跃先; 尹威; 于晶

    2015-01-01

    Objective To compare the efficacy of proximal humerus locking plate and conventional plate in treatment of proximal humerus fractures.Methods66 patients with proximal humeral fracture were divided into two groups. The observation group used locking proximal humerus plate,control group used conventional plate. compared the effect of two groups.ResultsThe Neer score, excelent rate and complication rate of the observation group were significantly better than control group (P<0.05).ConclusionThe proximal humerus locking plate can promote the healing of fractures,and less complications.%目的:探讨肱骨近端加压锁定钢板和传统钢板治疗肱骨近端骨折的效果。方法选择将我院收治的66例肱骨近端骨折患者随机平分为2组。观察组行加压锁定钢板术,对照组行传统钢板术。比较两组临床疗效。结果观察组Neer评分、优良率及并发症发生率优于对照组(P<0.05)。结论肱骨近端加压锁定钢板治疗肱骨近端骨折有利于骨折的快速愈合,且并发症少。

  3. Proximal humerus comminuted fracture of the plate fixation in the treatment of locking application%肱骨近端粉碎性骨折应用锁定钢板内固定治疗的临床分析

    Institute of Scientific and Technical Information of China (English)

    叶鹏

    2014-01-01

    Objective:To study the comminuted fractures of the proximal humerus locking plate internal fixation treatment.Methods:A retrospective analysis of 22 cases of proximal humerus fractures in our hospital patient data.Results:Patients with fractures healed,the average healing time of 22W frac-ture,the excellent and good rate was 81.8%.Conclusion:the use of locking plate fixation for comminuted fractures of the proximal humerus,effect.%目的:研究分析肱骨近端粉碎性骨折应用锁定钢板内固定治疗效果。方法:回顾性分析我院收治的22例肱骨近端粉碎性骨折患者的资料。结果:患者骨折愈合良好,骨折平均愈合时间为22w,优良率为81.8%。结论:采用锁定钢板内固定治疗肱骨近端粉碎性骨折,效果显著。

  4. Application of long PHILOS locking compression plate for treatment of proximal humerus long segment fractures%应用长PHILOS接骨板治疗肱骨近端长节段骨折

    Institute of Scientific and Technical Information of China (English)

    郑继会; 苑娜; 胡思斌; 孙宏辉; 赵爱军; 刘道阔

    2013-01-01

    目的 探讨长PHILOS接骨板治疗肱骨近端长节段骨折的疗效.方法 应用长PHILOS接骨板结合MIPO技术治疗22例肱骨近端长节段骨折患者.结果 患者均获随访,时间8~36个月,骨折全部愈合.按照Neer肩关节功能评分标准:优12例,良8例,可2例.结论 应用长PHILOS接骨板结合MIPO技术治疗肱骨近端长节段骨折固定可靠,可以早期功能锻炼,术后功能恢复满意,是治疗肱骨近端长节段骨折有效的方法.%Objective To explore the treatment effeet of long proximal humeral internal locking system ( PHILOS )for proximal humeral long segment fractures. Methods 27 cases of proximal humeral long segment fractures were treated with long PHILOS locking compression plate combined with MIPO technology. Results All patients were followed up for 8 ~ 36 months, all fractures were union. By Neer shoulder scoring system, 12 cases were excellent, 8 good, and 2 fair. Conclusions Applying long PHILOS locking compression plate combined with MIPO technology in treatment of proximal humeral long segment fractures provides a stable fixation and earlier rehabilitation. It is an effective method for proximal humeral long segment fractures.

  5. Determination of Two Columns Performance

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    When protein is analyzed by high performance liquid chromatography (HPLC), the selection of column is one of the most important factors. There are four quality control parameters for the column, which are theoretical plates n, capacity facto

  6. Analysis of amelioration of neurological function on cervical degeneration disease after treatment with cervical spine locking plate%颈椎带锁钢板内固定术对颈椎退变性疾病神经功能改善的分析

    Institute of Scientific and Technical Information of China (English)

    赖志军; 谢惠缄; 谢唏衷; 肖建如

    2002-01-01

    Objective To discuss the clinical effect of treatment with anterior decompression, bone graft and cervical locking plate fixation for cervical degeneration disease.Method 23 patients with cervical spondylotic myelopathy and cervical ossification of the posterior longitudinal ligament have undergone the treatment of anterior cervical spine locking plate fusion.Neurological signs and symptoms were evaluated before and after surgery, and mean follow up time was 11.3 months.Result In all cases,radiography demonstrated a solid bony fusion.Additional general complications include a large wound hematoma in one and hoarseness in one.All patients' neurological function were improved.Conclusion The clinical effect of treatment with anterior decompression, bone graft and cervical locking plate fixation for cervical degeneration disease is satisfactory.

  7. Analysis of the Outcomes of Anatomical Lock Plate for C Type Distal Humerus Fracture%解剖锁定接骨板治疗C型肱骨远端骨折的疗效分析

    Institute of Scientific and Technical Information of China (English)

    朱前拯; 刘成刚; 段亚景; 杨雨润; 杨欢; 陈星佐; 王立强; 陈瀛; 杨连发; 林朋

    2015-01-01

    pneumatic tourniquet and the incision was from the postmiddle side of the elbow . The ulnar nerve was revealed and protected , and the operation was started from the olecroanon resected surface ,the distal humerus and the joint surface were revealed .The operators should be cautious of the osteotomy inside the olecroanon joint surface apterium ,and the osteotomy location was 2cm below the olecroanon point . In the operation , firstly both the inner side and lateral side of olecranon should be exposed and then performed osteotomy to the midpoint apterium between elecranon and trochlear .When performing the osteotomy ,the operators firstly used the thin saw blade to cut off from the dorsal cortical bone to the subchondral bone ,and then cut off the final joint surface by osteotome .The principles of fixing the distal humerus fracture were firstly recovering the evenness of the joint surface ,and then using 10mm kirschner pins temporally or permanently to fix beneath the articular cartilage .the distal humerus inner side and lateral side column were restored ,and then they were temporally fixed with kirschner pins .The fixation couldbe achieved by using the AO humerus inner side and lateral side anatomical lock plates .The radial side plate was placed to the radial dorsal side of lateral column , the ulnar plate was placed next to the inner side of bone crest . Anterior transposition of ulnar nerve was performed in all patients ,and those patients who were complicated with ulnar nerve rapture were given suture .It should be noted that the ulnar nerve should be out of touch of the internal fixation metals .Before closing the wound ,the patients should stretch their elbow joints and observed whether they ulnar nerve entrapment so as to rectify in time .Drainage tubes were placed after operation , and the drainage tubes should be taken away 24 hours after operation . Meanwhile ,the patients should be guided to have elbow joint functional exercise ,and keep doing the elbow joint

  8. 肱骨近端解剖锁定钢板与解剖钢板治疗肱骨Neer三、四部分骨折的疗效比较%Comparison of proximal humerus locking plate and anatomical plate for Neer three-and four-part of proximal humeral fractures

    Institute of Scientific and Technical Information of China (English)

    朱豪东; 蔡新新; 郭云峰; 郑柏生; 周卓谦

    2015-01-01

    目的:探讨肱骨近端解剖钢板与肱骨近端解剖锁定钢板治疗老年肱骨近端 Neer三、四部分骨折的功能及疗效差异。方法收集有完整随访资料的151例老年Neer 三、四部分骨折患者,按手术方式分为肱骨近端解剖钢板组(A 组,65例)和肱骨近端解剖锁定钢板组(B 组,86例),在随访过程采用Constant 评分及Neer 评分评价并比较两组疗效。结果 B 组平均愈合时间显著短于A 组(P<0.05)。两组的术后1年和术后2年功能比较:B 组Neer 评分的疼痛、功能、活动度及总分均显著优于 A 组(P<0.05);B 组 Constant 评分的疼痛、日常生活活动、主动活动及总分显著优于 A 组(P<0.05)。结论肱骨近端解剖钢板与肱骨近端解剖锁定钢板均可用于老年Neer 三、四部分骨折,但解剖锁定钢板愈合更快,功能恢复更好,临床推荐优先使用。%Objective To investigate the effect of proximal humerus locking plate and proximal humerus anatomical plate on complex 3- and 4-part fractures of the proximal humerus (Neer classification) in the elders. Methods 151 cases of proximal humeral fractures were included in the study and divided into proximal humerus anatomical plate group (A group, n=65 cases) and proximal humerus locking plate group (B group, n=86 cases) according to different operation methods. The patients of A group underwent fracture fixation by anatomical plate and those in B group received fracture fixation by locking proximal humerus plate. The treatment effect was evaluated in two groups and compared between two groups by Neer score and Constant score. Results The mean humerus healing time of B group was significant superior to A group (P<0.05). Neer score, constant score, pain , function , activity and total score of shoulder in B group were significant superior to those in A group in 1 year and 2 years after operation (P<0.05). Conclusion Proximal humerus

  9. 锁定接骨板与解剖接骨板治疗老年肱骨近端骨折的比较%Comparison of Locking Plate and Anatomical Plate in Treatment of Elderly Patients with Proximal Humerus Fractures

    Institute of Scientific and Technical Information of China (English)

    潘捷; 黄吉利; 龙德生

    2011-01-01

    Objective:To compare the effects of locking plate and anatomical plate on elderly patients with proximal humerus fractures.Methods:The proximal humerus locking plate and ana-tomical plate were used to treat 56 cases of proximal humeral fractures.Operative time(min),blood loss(mL),postoperative pain score(score),postoperative joint function score(score) were compared of two treatment methods.Results:56 patients were followed up for 6 months to 18 months,average of 12 months.Locking plate group blood loss(134.55±30.67)mL were less than the anatomical plate group(178.69±50.73)mL;operation time(79.65±20.37)min were less than anatomical plate group(96.87±30.63)min;postoperative pain VAS score(1.35±0.22)points were less than anatomical plate group(2.27±1.23)points;postoperative shoulder function Neer score(94.53±8.54)points and Constant score(90.26±10.37)points were higher than anatomical plate group.Differences were statistically significant(P0.05).Conclusion:The treatment to proximal humerus fractures in aged patients with locking plate has more advantage than anatomical plate.%目的:对比锁定接骨板与解剖接骨板治疗老年肱骨近端骨折的效果.方法:应用肱骨近端锁定接骨板及解剖接骨板治疗肱骨近端骨折56例.比较两种治疗方法在手术时间、术中出血量、术后疼痛评分、术后关节功能评分(score)等方面的差异.结果:56例均获随诊,随诊时间6~18个月,平均12个月.锁定接骨板组术中出血量(134.55±30.67)mL少于解剖接骨板组(178.69±50.73)mL;手术时间(79.65±20.37)min短于解剖接骨板组(96.87±30.63)min;术后疼痛VAS评分(1.35±0.22)分低于解剖接骨板组(2.27±1.23)分;术后肩关节功能Neer评分(94.53±8.54)分及Constant评分(90.26±10.37)分均高于解剖接骨板组.差异均有统计学意义(P〈0.05).结论:锁定接骨板治疗老年

  10. Plate column biosorption of Cu(II) on membrane-type biosorbent (MBS) of Penicillium biomass: optimization using statistical design methods.

    Science.gov (United States)

    Xiao, Gang; Zhang, Xin; Su, Haijia; Tan, Tianwei

    2013-09-01

    Based on the coupling of biosorption and membrane separation, a low cost membrane-type biosorbent (MBS) of Penicillium biomass was prepared. The surface morphology, pore properties and functional groups were studied via the characterization of MBS. Batch biosorption experiments indicated the maximum biosorption capacity of Cu(II) on MBS was 126.58 mg/g and about 90% of that on chitosan membrane. A plate column reactor filled with multi-layer of MBS was built for treatment of wastewater contaminated by Cu(II). The biosorption process factors were screened using Plackett-Burman design and three significant variables were selected for further optimization via response surface methodology (RSM) based on Box-Behnken model. A statistically second-order polynomial model was constructed with the error below 1.22%, on the basis of which the three-dimensional response surfaces were plotted. The prepared membrane-type biosorbent could be used successfully for 10 biosorption-desorption-regeneration cycles without decreasing its biosorption ability obviously.

  11. Stability of unicortical locked fixation versus bicortical non-locked fixation for forearm fractures

    Institute of Scientific and Technical Information of China (English)

    Timothy J.Pater; Steve I Grindel; Gregory J.Schmeling; Mei Wang

    2014-01-01

    Locking plate fixation is being widely applied for fixation of forearm fractures and has many potential advantages, such as fixed angle fixation and improved construct stability, especially in osteoporotic bone. Biomechanical data comparing locking devices to commonly used Low Contact Dynamic Compression (LCDCP) plates for the fixation of forearm fractures has been lacking. The purpose of this study was to compare the fixation stability of a 3.5-mm unicortical locked plate with bicortical non-locked LCDCP plates. Six matched pairs of fresh frozen cadaveric forearms were randomly assigned to unicortical locked and bicortical unlocked groups. Non-destructive four-point bending and torsional test was performed on the ulna and radius separately, using a servohydraulic testing system to obtain construct stiffness of the intact specimens and specimens after osteotomy and plating. The specimens were then loaded to failure to test the fixation strength. The locked unicortical fixation showed significantly higher bending stiffness than the unlocked bicortical fixation, but with significantly lower stiffness and strength in torsion. Fixation strength was comparable between the two groups under bending, but significantly greater in the bicortical non-locked group under torsion. Findings from this study suggest that postoperative rehabilitation protocols may need modification to limit torsional loading in the early stage when using locked unicortical fixation. The study also points out the potential advantage of a hybrid fixation that combines locked unicortical and unlocked bicortical screws.

  12. 微创锁定接骨板治疗老年肱骨近端复杂骨折%Minimally invasive locking proximal humerus plate in treatment of complex proximal humerus fractures in the elderly

    Institute of Scientific and Technical Information of China (English)

    陈烁; 徐若男; 蔡筱松; 刘宏滨

    2012-01-01

    目的 探讨微创肱骨近端锁定接骨板(LPHP)治疗老年肱骨近端复杂骨折的临床疗效.方法 回顾分析采用微创LPHP治疗24例老年肱骨近端复杂骨折.按Neer分型,3部分骨折14例;4部分骨折10例.结果 24例经9 ~39个月随访,无一例发生内固定松动、断裂,全部骨折均愈合.肩关节功能按照Constant评分标准,功能优12例,良9例,中3例,优良率87.5%.结论 微创LPHP内固定治疗肱骨近端复杂骨折固定可靠,骨折愈合率高,可行早期功能锻炼,功能恢复好,尤其适用于治疗老年骨质疏松患者.%Objective To study surgical treatment of complex proximal humeral fracture in the elderly with minimally invasive locking proximal humerus plate. Methods 24 cases of complex fractures of the proximal humerus treated with minimally invasive locking proximal humerus plate were retrospectively analysed. According to Neer classification,there were 14 cases with three-part fractures and 10 cases with four-part fractures. Results The follow-up ranged from 9 months to 39 months, all cases experienced bone union, without internal fixation loosing and breakdown. By Constant scoring system,there were 12 excellent cases,9 good cases and 3 fair cases. The excellent and good rate was 87. 5%. Conclusion Application of minimally invasive locking proximal humerus plate can resuh in more reliable fixation. Higher bone union rate, earlier rehabilitation and better functional recover in treatment of complex fractures of the proximal humerus, especially in the elderly.

  13. 肱骨近端解剖锁定钢板治疗肱骨外科颈骨折的效果观察%Observation on effect of surgical neck fractures of humerus by locking proximal humerus plate fixation

    Institute of Scientific and Technical Information of China (English)

    陈兆平

    2014-01-01

    目的:探究肱骨近端解剖锁定钢板治疗肱骨外科颈骨折的临床效果。方法选取近3年到我院就诊的肱骨外科颈骨折患者120例,给予患者肱骨近端解剖锁定钢板治疗,观察其临床效果并定期随访,评价其肩关节功能。结果所有患者均顺利完成手术,术中未出现神经、血管损伤,住院期间和随访期间均未发生感染等并发症,术后切口都是Ⅰ期愈合,按照 neer 评定标准,优良率达92.5%。结论肱骨近端解剖锁定钢板治疗肱骨外科颈骨折,具有固定可靠、效果良好、并发症少、操作简单等优点,适合临床推广应用。%objective To explore the effect of surgical neck fractures of humerus by locking proximal humerus plate fixation. Methods choced 120 patients with surgical neck fractures of humerus which was cheated in our hospital in the last three years, treated the patients with locking proximal humerus plate fixation, then observed the clinical effect and evaluated the function of shoulders after regular follow-up. Results all patients completed the surgery smoothly, no case of blood vessels and nerve damage, and no infection occurred during hospitalization and the follow up period, all the patients got recovered in Ⅰ period and the excellent and good rate was 92.5%. Conclusions surgical neck fractures of humerus by locking proximal humerus plate fixation, has the advantages of reliable fixation, good effect, less complications and simple operation, it is suitable for clinical application.

  14. 锁定钢板治疗肱骨近端骨折30例临床分析%Clinical analysis of locking plate in treatment of proximal humerus fractures 30 cases

    Institute of Scientific and Technical Information of China (English)

    肖锦春

    2011-01-01

    Objective To investigate the effect of locking compression plate (LCP) in treatment of complex proximal humeral fractures. Methods The proximal humerus locking plate in treatment of proximal humerus fractures, 30 cases classified according to Neers, two - part fracture in 12 cases, three - part fractures in 16 cases, four - part fractures in 2 cases. Results The group of 30 cases of surgical patients were 6 to 13 months follow -up, average 11.5 months, all fractures healed within 12 months. According to Neer shoulder function assessment criteria; excellent in 18 cases, good in 8 cases, effective in 4 cases, the whole group of excellent and good rate was 86. 7%. Conclusions Treatment of proximal humeral locking plate fixation of proximal humeral fractures, reliable, fewer complications, and early functional exercises, results were satisfactory, especially for elderly patients with osteoporosis is particularly applicable.%目的 探讨应用锁定加压接骨板(LCP)治疗肱骨近端复杂骨折的疗效.方法 应用肱骨近端锁定钢板治疗肱骨近端骨折30例,根据Neers分类,二部分骨折12例,三部分骨折16例,四部分骨折2例.结果 本组30例手术患者均获得6~13个月的随访,平均11.5个月,骨折12个月内全部愈合.按Neer肩关节功能评分标准评定:优18例,良8例,可4例,全组优良率86.7%.结论 肱骨近端锁定钢板治疗肱骨近端骨折固定可靠,并发症少,可早期进行功能锻炼,疗效满意,特别是对于老年骨质疏松的患者尤为适用.

  15. Analysis of the Effect of Locking Compression Plate Internal Fixation for Aged Fractures of Humerus%老年肱骨远端骨折锁定加压钢板内固定手术疗效分析

    Institute of Scientific and Technical Information of China (English)

    冯波

    2015-01-01

    Objective To study the analysis of the distal humerus fractures in elderly patients with locking compression plate fixation for the treatment of clinical effect.Methods 34 cases of elderly patients with distal humerus fractures were selected in May 2014 to May 2012 in our hospital, all patients were treated with locking compression plate fixation surgery, all patients were observed fracture healing effect. ResultsAll patients were followed, including fracture healing excellent in 19 cases, good in 13 cases, good in 13 cases, medium in 1 cases, and poor in 1 cases, the treatment rate of 94.1% excellent, and all the patients were not there wound infection, delayed union and nonunion and other complications.Conclusion Locking compression plate ifxation distal humeral fractures in elderly patients can promote fracture healing, the effect is signiifcant.%目的:研究分析老年肱骨远端骨折患者采用锁定加压钢板内固定术治疗的临床效果。方法选择我院2012年5月~2014年5月收治的34例老年肱骨远端骨折患者,所有患者均采用锁定加压钢板内固定手术治疗,观察所有患者的骨折愈合效果。结果对所有患者进行随访,其中骨折愈合优19例、良13例、可1例、差1例,其治疗优良率达94.1%;且所有患者均未出现伤口感染、骨折延迟愈合和骨不连等并发症。结论锁定加压钢板内固定术治疗老年肱骨远端骨折能够促进患者骨折愈合,效果显著。

  16. 肱骨近端锁定接骨板治疗老年肱骨近端骨折%Proximal humerus locking plate fixation in the treatment of proximal humeral fracture

    Institute of Scientific and Technical Information of China (English)

    杨志; 陈记明

    2015-01-01

    目的:探讨应用肱骨近端锁定接骨板内固定治疗老年肱骨近端骨折的手术疗效。方法:回顾分析应用肱骨近端锁定接骨板内固定治疗21例老年肱骨近端骨折患者的临床资料,Neer分型,三部分骨折17例,四部分骨折4例。结果:通过术后(13.5±1.2)个月随访。骨折愈合时间3~8个月;根据Neer肩关节功能评分标准进行评定,优12例,良6例,可2例,差1例,优良率85.7%。结论:肱骨近端锁定接骨板治疗老年肱骨近端骨折内固定牢靠,局部创伤小,骨折愈合时间短,关节功能恢复满意,是老年肱骨近端骨折理想的治疗方法。%Objective:To explore the operation effect of the proximal humerus locking plate fixation in the treat-ment of proximal humeral fracture. Methods:a retrospective analysis of the proximal humerus locking plate fixation in the treatment of 21 cases of senile proximal humeral fractures in patients with clinical data, The Neer type, the three part fractures in 17 cases, 4 cases of four part fractures. Results:the patients were followed up for 10~18 months, av-erage 13.2 months. Fracture healing time of 3~8 months; shoulder joint function were evaluated according to Neer score standard, excellent in 12 cases, good in 6 cases, 2 cases, poor in 1 cases, the excellent and good rate was 85.7%. Conclusion:the proximal humerus locking plate in the treatment of senile proximal humeral fracture internal fixation is the ideal treatment of senile proximal humeral fracture , with few local trauma, short fracture healing time, and satis-factory joint function recovery.

  17. 锁定钢板治疗肱骨近端骨折术后并发症的相关因素分析%Correlative factor analysis of complications in proximal humerus fractures treated with locking plates

    Institute of Scientific and Technical Information of China (English)

    韦盛旺; 赵友明; 杨杰; 郭晓山; 陈华; 杨翔; 陈林

    2012-01-01

    目的 探讨应用锁定钢板治疗肱骨近端骨折发生术后并发症的相关因素.方法 回顾性分析80例(并发症组29例,无并发症组51例)行锁定钢板(LPHP或PHILOS)治疗肱骨近端骨折患者资料,应用Logistic回归分析研究各因素与术后并发症的关系.结果 单因素分析示,并发症组在年龄、术后内侧皮质缺损、肱骨颈干角复位不佳等方面与无并发症组比较,差异有统计学意义(P <0.05);Logistic回归分析发现术后内侧皮质缺损和肱骨颈干角复位不佳是发生术后并发症的独立预测因素.结论 影响锁定钢板治疗肱骨近端骨折术后并发症的相关因素较多,其中术后内侧皮质缺损及肱骨颈干角复位不佳是主要因素.%Objective To explore the correlative factors affecting the complications in proximal humerus fractures treated with locking plates. Methods Eighty patients (29 cases with complications and 51 cases without) with proximal humerus fractures were treated by locking plates (LPHP or PHILOS) and were retrospectively analyzed. And logistic regression analysis was used to find main factors. Results The univariate analysis showed that age, the integrity of the medial humerus wall postoperatively and head-shaft angle had a significant association with complications encountered in proximal humerus fractures treated with locking plate fixation (P<0.05). The multiple stepwise logistic regression showed that the postoperative integrity of the medial humerus wall and head-shaft angle were key factors affecting the complications. Conclusion The integrity of the medial humerus wall and head-shaft angle are the main factors affecting the complications.

  18. 微创经皮钢板固定技术结合锁定钢板治疗胫骨粉碎性骨折%MIPPO Technology Combined with Locking Plate in the Treatment of Comminuted Fracture of Tibia

    Institute of Scientific and Technical Information of China (English)

    邵安泽; 岳洋; 潘长军; 顾飞; 吴瑞; 聂玮

    2015-01-01

    目的:观察微创经皮钢板固定(MIPPO)技术闭合复位结合锁定钢板治疗胫骨粉碎性骨折的临床效果.方法:采用MIPPO技术闭合复位结合锁定钢板治疗胫骨粉碎性骨折24例,男17例女7例,年龄23~65岁,平均42.4岁,胫骨中上段骨折15例,胫骨中下段9例.结果:24例患者均获得随访,时间6~14m,平均9.6m,术后采用Johner-Wruhs关节功能评定标准,24例患者优21例,良2例,中1例.结论:运用MIPPO技术闭合复位结合锁定钢板治疗胫骨粉碎性骨折能有效的降低软组织创伤,减少血运破坏,骨折愈合时间短等优点,是治疗胫骨粉碎性骨折的一种有效办法.%Objective: To investigate the use of closed reduction MIPPO technology combined with locking plate in the treatment of tibial comminuted fracture of the clinical effect. Methods:The use of closed reduction MIPPO technology combined locking plate in the treatment of comminuted fracture of the tibia in 24 cases, including 17 males and 7 females, aged 23~65 years, mean 42.4 years, the upper tibia 15 cases of fracture of tibia in nine cases the next segment.Results:24 patients were followed up for 6~14m, average 9.6m, after using Johner-Wruhs joint function evaluation standard, the results were excellent in 21 cases, good in 2 cases, 1 case.Conclusion:Closed reduction MIPPO technology combined with the locking plate in the treatment of comminuted fracture of the tibia with a soft tissue trauma, less blood supply destruction, reliable fixation, fracture healing time is short, etc., it is an effective way to treat comminuted fracture of the tibia.

  19. Curative effect analysis of proximal femoral locking compression plate femoral subtrochanteric comminuted fracture%近端锁定加压钢板治疗股骨转子下骨折疗效分析

    Institute of Scientific and Technical Information of China (English)

    杨治涛; 郑锐

    2014-01-01

    Objective:To explore the proximal femoral locking compression plate fixation of intertrochanteric frac-ture surgery. Methods:14 cases clinical data of intertrochanteric fractures proximal femoral locking compression plate fixation in our hospital were retrospective analyzed. Results:Follow-up time for 8 to 18 months.Fracture healing time of 12-18 weeks, mean (14.2±2.6)weeks, the healing rate of 100%.good rate of 92.8%.Conclusion:proximal femoral locking compression plate fixation of intertrochanteric fracture trauma, shorter operative time, reliable fixation, fracture healing, joint function recovered satisfactorily, clinical efficacy, suitable for different age groups subtrochanteric fracture, femur subtrochanteric fractures more satisfactory method of treatment.%目的:探讨股骨近端锁定加压钢板在股骨转子下粉碎性骨折治疗中的手术效果。方法:回顾分析14例股骨转子下粉碎性骨折患者应用股骨近端锁定加压钢板内固定治疗的临床资料。结果:随访时间8~18个月,患者全部愈合,愈合时间为12~18周,平均为(14.2±2.6)周,优良率92.8%。结论:股骨近端锁定加压钢板治疗股骨转子下粉碎性具有骨折创伤小,手术时间短,固定可靠,骨折愈合快,关节功能恢复满意,临床疗效好,适用于不同年龄组股骨转子下骨折,是较为理想的治疗方法。

  20. Spiral multicapillary columns

    Science.gov (United States)

    Efimenko, A. P.; Naumenko, I. I.; Soboleva, V. K.

    2008-08-01

    It was shown in a theoretical study and confirmed by experiment that a spiral multicapillary column had maximum efficiency if the bunch of capillaries was additionally coiled around its longitudinal axis to produce an integral number of coils. This technique made it possible to manufacture gas-chromatographic columns with performance as high as 12 to 16 thousand theoretical plates. These columns can find various applications, especially if quick separation is required.

  1. Treatment of proximal humeral fractures with interlocking intramedullary nail versus locking plate%锁定钢板与交锁髓内钉治疗肱骨近端骨折的疗效分析

    Institute of Scientific and Technical Information of China (English)

    徐小东; 张殿英; 付中国; 王天兵; 陈建海; 杨明; 芦浩

    2014-01-01

    Background Proximal humeral fracture is usually seen in elder citizens with osteoporosis,and such a fracture in younger patients mainly results from high-energy inj ury.Surgical procedure is often adopted for patients with unstable or obviously displaced fracture.Open reduction and locking plate fixation or closed reduction and interlocking intramedullary nail fixation are two common treatment methods for proximal humeral fracture.In this paper,retrospective analysis was conducted to compare the clinical curative effects between locking plate and intramedullary nail in the treatment of proximal humeral fracture.Methods General data:From January 2012 to May 2013,38 patients with full information in our department were randomly selected in the retrospective analysis, including 13 male and 25 female,aged from 20 to 86,and the mean age was 66.5 ± 16.9 years. According to the different treatment methods,the patients were divided into the locking plate group (24 cases)and the interlocking intramedullary nail group (14 cases).All patients had unilateral closed fractures treated with locking plate or interlocking intramedullary nail,including 22 cases on the left side and 17 cases on the right side.28 patients were injured from low energy falls and 10 cases were from high energy trauma like skiing,motor accidents,etc.According to Neer classification,7 cases of two-part fracture,1 1 cases of three-part fracture and 6 cases of four-part fracture were in the locking plate group,and 8 cases of two-part fracture,5 cases of three-part fracture and 1 case of four-part fracture were in the interlocking intramedullary nail group.In the meanwhile,on the basis of AO classification,4 type 11-A cases,14 type 11-B cases and 6 type 11-C cases were in the locking plate group,and 7 type 1 1-A cases,6 type 1 1-B cases and 1 type 1 1-C case were in the interlocking intramedullary group.PHILOS plate of Synthes,Inc.and TRIGEN intramedullary nail of Smith &Nephew,Inc.were used in the operation

  2. Clinical outcomes of proximal humeral internal locking system self-locking plates in treatment of proximal humeral fractures%肱骨近端内固定系统自锁钢板治疗肱骨近端骨折疗效分析

    Institute of Scientific and Technical Information of China (English)

    唐康来; 许建中; 谭晓康; 吴雪晖; 徐格; 龚继承; 汪华清; 谢肇; 马树枝; 王序全

    2008-01-01

    目的 介绍肱骨近端内固定系统(proximal humeral internal locking system,PHILOS)白锁钢板治疗肱骨近端骨折的方法并分析其疗效. 方法 本组男19例,女16例;年龄29~92岁,平均53.5岁.所有骨折均按Neer分型标准进行分类,其中二部分骨折19例,三部分骨折15例,四部分骨折1例.手术采用胸人肌-三角肌间隙入路,均采用PHILOS自锁钢板进行固定.术后对所有患者进行平均18.9个月(6~46个月)的临床随访,主要包括X线片和Constant功能评分. 结果 X线片证实所有肱骨近端骨折均得到良好的复位并完全骨性愈合,愈合时间8~12周.最近一次Constant-Murley功能评分:平均89.5分(82~94分).随访期间未发生钢板松动、肱骨头缺血性坏死和需肱关节创伤性关节炎等并发症. 结论 PHILOS自锁钢板是治疗肱骨近端骨折的好方法,具有操作方便、固定可靠、疗效确切及并发症少的优势.%Objective To evaluate the clinical results of proximal humeral internal locking sys-tem(PHILOS)self-locking plates in treatment of proximal humeral fractures. Methods There were 35 patients including 19 males and 16 females(at mean age of 53.5 years,ranging from 29 to 92 years)with proximal humeral fractures treated with PHILOS plate.According to the Neer's classification sys-tem,there were two-part fractures in 19 patients,three-part fractures in 15 and four-part fractures in 1.Surgery was performed with PHILOS serf-locking plate via dehopectoral approach.All patients were fol-lowed up for mean 18.9 months(6-46 months)and evaluated by using Constant score and X-rays. Re-suits X-rays proved that all fractures got good reduction and complete healing during 8-12 weeks.The latest Constant scores was mean 89.5 points(82-94 points).There were no complications including plate loosing.humenral head necrosis or gleno-humeral ioint osteoarthritis. Conclusion PHILOS plate is a good choice for treatment of proximal humeral fractures

  3. 锁定加压钢板在治疗桡骨远端不稳定骨折中的应用%Locking Compression Plate Fixation for Intraarticular and Unstable Distal Radial Fractures

    Institute of Scientific and Technical Information of China (English)

    张珂; 刘其明; 赵庆华; 李峰; 王予治; 孙羽

    2012-01-01

      目的:探讨锁定加压钢板(locking compression plate,LCP)治疗不稳定型桡骨远端骨折(distal radial fractures,DRF)的效果.方法:分析自2006年1月~2012年5月我院采用锁定加压钢板治疗桡骨远端不稳定骨折20例患者临床资料,其中男12例,女8例;年龄18~66岁,平均年龄44.6岁.按AO桡尺骨远端骨折分型,B2、3型(部分关节面骨折,掌背侧骨块)6例;Cl型(完全关节内骨折,干骺端骨折)7例;C2型(完全关节内骨折,干骺端粉碎骨折)5例;C3型2例.部分患者初期手法复位固定治疗失败.掌侧入路切开复位,LCP内固定治疗.结果:术后门诊随访2~36个月.桡骨远端骨折均完全愈合,按改良的Mcbirde评分和纽约骨科医院腕关节功能评估标准,优良率为85℅(17/20).结论:对桡骨远端不稳定性骨折,掌侧LCP是一种安全有效的治疗方法.%  Objective:To investigate the locking compression plate (locking compression plate,LCP) the effect of the treatment of unstable distal radial fracture (distal radial fractures,DRF). Methods: Analysis from January 2006 to May 2012 using locking compression plate for treatment of distal radius unstable fracture of the clinical data of 20 patients,including 12 males and 8 females; age 18-66 years,mean age 44.6 years old. Radius and ulna in remote according to the AO fracture classification,B2,3 (partial articular fractures,palm dorsal bone) six cases: Cl (complete articular fractures of the metaphyseal fracture) 7 cases; C2,type (full intra-articular fracture,metaphyseal comminuted fracture) 5 cases; C3 type 2 patients. Fixed treatment failure in some patients early manipulative reduction. Volar open reduction and internal fixation in the LCP.Results: Folowed-up from 2 to 36 months,Distal radius fractures are completely healed,the improved Mcbirde score and the New York Orthopaedic Hospital,wrist function evaluation criteria, excellent rate of 85 ℅ (17/20). Conclusion:Volar LCP

  4. 肱骨近端锁定加压钢板治疗肱骨近端骨折的疗效%The effect of proximal humeral locking plate in treating proximal humeral fractures

    Institute of Scientific and Technical Information of China (English)

    曾勉东; 谢景开; 杨波; 张志; 尹飚

    2013-01-01

    [ Objective ] To evaluate and observe functional outcome of locking proximal humeral plate ( LPHP) used for fixation of the proximal humerus fractures in elderly. [ Method] Retrospective analysis from December 2009 to December 2011,41 patients with an acute proximal humerus fracture were managed with locking proximal humeral plate osteosynthesis after open reduction,15cases were males, 28case were females, with age of 49 to 82(mean 67. 5). According to Neer classification, 12 cases were two-part fracture,22 cases were three-part fracture,7 cases were four-part fracture. [Result] All of them were with the mean follow-up of ranged 8-28 months (mean 14 months),healing at the last review. Functional score standard of Neer was used for evaluating the shoulder function, 13 cases were excellent,21 cases were good,4 cases were morderate,3 cases were poor,the excellent and good results rate was 82.9%. [ Conclusion] Locking proximal humeral plate osteosynthesis leads to satisfactory functional outcomes in proximal humerus fractures, which is a less complications, early functional exercise, effective therapeutic method.%[目的]观察、评价肱骨近端锁定加压钢板(locking proximal humeral plate,LPHP)治疗复杂性老年肱骨近端骨折的疗效.[方法]回顾性分析2009年12月~2011年12月41例老年肱骨近端二部分以上骨折采用骨折切开复位结合锁定钢板内固定治疗的疗效,其中男13例,女28例,年龄49 ~ 82岁(平均67.5岁).按Neer分类法:2部分骨折12例,3部分骨折22例,4部分骨折7例.[结果]41例均获随访,随访时间8~ 28个月(平均14个月),骨折均得到了愈合,随访肩关节功能按Neer功能评分标准,优13例,良21例,可4例,差3例,优良率达82.9%.有1例发生肱骨头缺血坏死,2例发生肩峰撞击综合征.[结论]锁定钢板针治疗老年性肱骨近端骨折固定可靠,并发症少,骨折愈合良好,便于早期功能锻炼,是一种有效的治疗方法.

  5. Clinical analysis of 24 cases of fracture of anatomical plate in the treatment of tibial locking%解剖锁定钢板治疗胫骨平台骨折24例临床分析

    Institute of Scientific and Technical Information of China (English)

    和尧虎; 王玲智; 李晓波; 杨慧斌; 马龙

    2015-01-01

    Objective To investigate the choice of different approach, anatomic locking plate fixation in thetreatment of different types of tibial plateau fractures.Methods from 2010-01-2013-06, 24 cases of tibial plateau fracture by patellar, anterior lateral incision, anterior medial incision, anterior lateral incision combined with small incision or patellar medial posterior median longitudinal incision. Simple proximal lateral tibiaanatomical locking plate , or with"T"type, rear locking reconstruction plate internal fixation.Results in this group, 24 cases got follow-up, 6 months to 30 months, average 15 months. After 6 to 12 months, all fractures healed, no loosening of the internal fixation of fracture,one case of superficial infection, Staphylococcus epidermidis infection by VSD culture, negative pressure suction a week, anti infection, skin grafting for 4 weeks.A case of sural total nerve damage, weak foot dorsiflexed. Using the Rasmussen function evaluation:excellent in 14 cases, good in 7 cases, 2 cases, poor in 1 cases. Excellent rate was 87.5%.Conclusion Choose a different approach,anatomic locking plate fixation in the treatment of different types of tibial plateau fractures, early functional exercise, is an effective method.%目的:探讨解剖锁定钢板内固定治疗胫骨平台骨折的疗效。方法2010年1月—2013年6月,对24例胫骨平台骨折患者采取髌旁前外侧切口、前内侧切口、前外侧切口加后内侧小切口或髌正中纵行切口,单纯胫骨近端外侧解剖锁定钢板或加内、后侧“T”形锁定、重建钢板复位内固定。结果本组24例均获得随访,时间6个月~30个月,平均15个月。术后6个月~12个月骨折全部愈合,内固定无松动断裂,其中1例切口浅表感染,培养表皮葡萄球菌感染,经负压封闭引流术(VSD)负压吸引1周,抗感染、植皮4周痊愈。1例腓总神经损伤,足背伸无力。采用Rasmussen功能评定标准:优14

  6. 双柱双接骨板技术治疗伴背侧骨质缺损的C型桡骨远端骨折30例%Double column double plate technique used in 30 patients with type C distal radius fractures

    Institute of Scientific and Technical Information of China (English)

    彭军; 周雪峰; 白克文; 王蒙; 鲍磊

    2015-01-01

    Background:For the treatment of dorsal type C distal radius fractures with bone defects, volar plate fixation is commonly used. However,the fixation is not firm, and clinical efficacy is poor. Meanwhile, there are few of reports on dorsal approach using double plate technique. Objective:To investigate clinical outcomes of double plate technique for type C distal radius fractures with bone defects. Methods:Thirty patients with type C distal radius fractures with dorsal cortical defects were treated by using two anatomi-cal locking plates between September 2012 and March 2014. The plates were placedon the radialcolumn and the middle col-umn bythe dorsal approach. There were 17 males and 13 females with a mean age of 60.5 years (range, 55-76 years). Ac-cording to AO classification, there were 21 patients with type C2 fracture and 9 patients with type C3 fracture. Gartland-Werley scoring system was used to evaluate the wrist joint function. Results: The surgery was successfully finished in all patients. The mean operation time was 60 min (range, 50-70 min). Bony healing was achieved in all fractures in more than one year follow-up. The wrist function recovered well.Nocomplica-tionsrelated to platesoccurred until now. Conclusions:Double plate fixation inthe middle column and radial column is a reliable and useful treatment for C type dis-tal radius fractures of dorsal bony defect.%背景:对于背侧骨质缺损的C型桡骨远端骨折的治疗,掌侧入路接骨板固定虽为常用手术方式,但其固定不牢固,临床疗效欠佳,而背侧入路使用双接骨板技术的临床报道较少.目的:探讨使用双接骨板技术治疗背侧骨质缺损的C型桡骨远端骨折的效果.方法:2012年9月至2014年3月,采用背侧入路在桡骨的桡侧柱与中间柱放置两块解剖自锁接骨板治疗背侧皮质缺损的C型桡骨远端骨折30例.男17例,女13例;年龄55~76岁,平均60.5岁.骨折按AO分型:C2型21例,C3型9例.术后定期摄X线片检

  7. 49 CFR 236.779 - Plate, top.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Plate, top. 236.779 Section 236.779 Transportation... OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES Definitions § 236.779 Plate, top. A metal plate secured to a locking bracket to prevent the cross locking from being forced out of the...

  8. Locking intrameduilar nail and locking plate in treatment of proximal humerus fractures:a comparative study%锁定型髓内针和锁定型钢板治疗肱骨近端骨折的对比研究

    Institute of Scientific and Technical Information of China (English)

    朱以明; 鲁谊; 姜春岩

    2008-01-01

    目的 对比肱骨近端锁定型髓内针或肱骨近端锁定型钢板治疗肱骨近端骨折的疗效,并探究两种内固定物各自的特点. 方法 54例新鲜肱骨近端二部分外科颈骨折患者,分为髓内针同定组(26例)和锁定犁钢板同定组(28例),两组在平均年龄比例、性别比例、优势侧受累比例方面差异尤统计学意义.最终随访时进行洋细肩关节体检,拍摄肩关节X线片以评价愈合的情况,并应用疼痛的视觉评分(VAS),美国肩肘外科医师评分(ASES),Constant-Murley评分,以及简单肩关节功能问卷(SST)评估患者肩关节功能,对比两组的结果. 结果 所有骨折均在术后8周内初步愈合.随访过程中两组均未出现感染、肱骨头坏死.钢板组患者并发症率较髓内针组高.两组的肩关节功能恢复情况均比较令人满意.两组间在术后患肢平均主动前屈上举、主动体侧外旋、主动内旋体侧内旋活动度、Constant-Murley评分、SST评分方面差异无统计学意义.但钢板组在最终患者的肩关节ASES评分、VAS评分和平均冈上肌肌力等方而优于髓内针组. 结论 两种内固定物均可较满意地治疗肱骨近端二部分外科颈骨折.锁定型髓内针创伤较小,而锁定型钢板在术后功能恢复方面更具优势.%Objective To compare the results of locking intramedullar nail and Locking plate in treating proximal humerus fractures and discuss features of each instrument. Methods A total of 54 patients with fresh two-part surgical neck fracture of proximal humerus were divided into intramedullar nail fixation group(26 patients)and locking plate fixation group(128 patients).with no statistical difference upon age,gender and dominate hand involvement in two groups.At final follow-up,physical examination and X-ray films were used to evaluate fracture healing of shoulder ioint.In the meantime,VAS score,ASES score,Constant-Murley score,UCLA and SST questionnaire were used to

  9. 外侧锁定板与内侧支持接骨板联合治疗C2及C3型股骨髁间骨折%Internal Fixation of Femoral Intercondylar Fracture with Lateral Locking Plate and Medial Buttress Plate

    Institute of Scientific and Technical Information of China (English)

    周建刚; 孟维春; 曹骏敏; 蒋臻欢

    2011-01-01

    Objective:To investigate the clinical effects of the treatment of type C2 and C3 femoral intercondylar fractures using locking plate and buttress plate. MethodS:From 2007 to 2010,18 cases of femoral intercondylar fractures were treated with lateral locking plates and medial buttress plates. According to Osteosynthe stfragen (AO) fracture classification, the fractures were classified as type C2 in 12 cases and type C3 in 6 cases. Medial and lateral approaches were used in the operation. After reduction,buttress plates were placed medially and locking plates were inserted laterally. There was no additional external fixation device postoperatively. Results: All the cases were followed up for an average of 8. 3 months and they all got bony union in 12-22 weeks. According to the criteria of Lysholm Knee Score, the result was as follows: 8 excellent, 8 good and 2 fair. The excellent and good rate was 89%. Conclusions: Open reduction and internal fixation with locking and buttress plates in the treatment of type C2 and C3 femoral intercondylar fracture has the advantage of a low rate complication, stable fixation and rapid bone union,and presents good clinical outcome.%目的:探讨外侧锁定板结合内侧支持接骨板治疗股骨髁间C2及C3型骨折的可行性.方法:采用外侧锁定板结合内侧支持接骨板治疗股骨髁间骨折患者18例.按AO分型:C2型12例,C3型6例,手术均采用内、外侧联合入路,骨折解剖复位后分别在外侧放置髁支持钢板,内侧放置普通钢板固定,术后不予外固定.结果:所有患者获得随访,平均随访时间为8.3个月,骨折均愈合,愈合时间12~22周.膝关节功能Lysholm评分:优8例,良8例,可2例,优良率为89%.结论:切开复位外侧锁定板结合内侧支持接骨板内固定治疗C2及C3股骨髁间型骨折并发症少、固定牢固、骨折愈合快,能获得良好的临床效果.

  10. 多轴锁定钢板治疗复杂胫骨平台骨折的初步疗效分析%Multiaxial locking plates for treatment of complex tibiai plateau fractures

    Institute of Scientific and Technical Information of China (English)

    郭永飞; 刘岩; 苟三怀; 曹振羽; 陈爱民; 欧阳跃平; 张伟; 侯春林

    2009-01-01

    目的 报告多轴锁定钢板治疗复杂胫骨平台骨折的方法及初步疗效. 方法 2006年7月至2007年6月,采用开放复位、多轴锁定钢板内固定治疗复杂胫骨平台骨折25例,闭合性骨折21例,开放性骨折4例;骨折按Schatzker分型:Ⅳ型6例,Ⅴ型16例,Ⅵ型3例;根据影像学测量结果及HSS评分标准进行临床效果评定.结果 所有患者术后获得7~15个月(平均10.5个月)随访,骨折4~6个月后骨折均获骨性愈合,术后6个月膝关节HSS评分78~96分,平均88.4分.发生皮瓣坏死1例,切口局部感染1例,无一例发生内固定松动、断裂或骨折复位丢失现象.术后1周、3个月及6个月的内翻角和后倾角比较差异无统计学意义(P>0.05). 结论胫骨平台多轴锁定钢板操作简便,锁定螺钉置入角度选择性高,内固定稳定性好,避免了原始及继发复位的丢失,是手术治疗复杂胫骨平台骨折安全、有效的内固定方法.%Objective To report clinical effects of multiaxial locking plates in the treatment of the complex tibial plateau fractures. Methods From July 2006 to June 2007, 25 cases of complex tibial plateau fractures, 18 males and 7 females, were treated with surgical reduction and internal fixation using multiaxial locking plates. The mean age of the patients was 32.8(20 to 56) years. There were 21 closed fractures and 4 open ones. According to Schatzker classification, 6 cases were of type Ⅳ, 16 of type Ⅴ, and 3 of type Ⅵ. The follow-up period lasted 10.5(7 to 15) months on average. The knee functions in all the patients were assessed according to radiological manifestations and HSS scoring. Results All fractures united at 4 to 6 months postoperatively and the average HSS score after half a year was 88.4 (78 to 96). Skin flap necrosis was found in 1 case and incision infection in another. No loosening or rupture of the fixator, or reduction failure was observed. Conclusions The multiaxial locking plate is an

  11. 颈椎前路蝶形钢板内固定系统的研制及临床应用%Design and preliminary clinical application of anterior cervical butterfly-like locking plate fixation system

    Institute of Scientific and Technical Information of China (English)

    金大地; 瞿东滨; 陈建庭; 江建明; 王吉兴; 朱青安

    2001-01-01

    Objective To evaluate the biomechanical stability and the preliminary clinical efficacy of self-designed anterior cervical butterfly-like locking plate fixation system. Methods The anterior cervical fixation system is composed of one butterfly-like plate and three types of screw made of titanium alloy(TC4,Ti6Al4V) on the basis of unicortical screw fixation and point contact plate fixation principle. Biomechanical stability analyses of the system and Orion locking plate system (Sofamor - Danek Corp) were performed in fresh cervical spine specimens from fourteen young male cadavers. 61 patients with cervical disorders were stabilized with the fixation system. The mean age of the patients during surgery was 48.2 years (range 18 to 68 years). The diagnosis included spondylosis in 26 cases, cervical intervertebral disk protrusion 14, fracture and/or dislocation 18 and tuberculosis 3. Results This anterior butterfly-like cervical plate fixation system holds similar biomechanical stability effects as Orion system. Of 61 cases received the plate fixation system after anterior decompression and autologous interbody fusion, 48 were followed-up for six to ten months, and showed solid interbody fusion in three to four months. No early complications such as implant loosening or failure related to the fixation system were noted. Conclusion The anterior cervical plate fixation system can provide sufficient biomechanical stability to cervical spine after anterior decompression surgery.%目的研制颈椎前路蝶形钢板内固定系统,评价其生物力学稳定性,并进行临床初步应用观察.方法该系统包括蝶形钢板及三种不同用途的螺钉,采用单皮质螺钉固定及点接触原理,由医用钛合金材料(TC4)制成.采用14具青年男性尸体的新鲜颈椎标本,利用脊柱三维运动分析系统,比较蝶形钢板固定与Orion钢板固定对失稳颈椎的稳定作用.临床上应用于颈椎患者的治疗61例,其中颈椎病26例,颈椎间

  12. Operative treatment of proximal humeral fractures with T incision and MIPPO locking compression plate%T形切口下微创锁定钢板治疗肱骨近端骨折疗效探讨

    Institute of Scientific and Technical Information of China (English)

    韩立强; 江汉; 肖联平; 杨国跃; 江毅; 张殿英

    2014-01-01

    目的:回顾性分析 T 形切口下微创锁定钢板治疗肱骨近端骨折的疗效。方法自2011年1月至2013年8月,我院收治肱骨近端骨折患者35例,分类方法采用 AO 分型,其中11-A2型7例,11-A3型12例,11-B1型8例,11-B2型6例,11-C1型2例,均采用T型切口下锁定钢板手术治疗,术后2~3d开始肩关节被动活动锻炼,逐渐增加活动范围,术后2 周开始肩关节摆动锻炼,术后3周开始肩关节锻炼,并采用 Neer肩关节功能评分。结果本组 3 5例患者手术切口均一期愈合,所有患者均得到随访,随访时间5~16个月,平均13.1个月,骨折均骨性愈合,术后未发现腋神经损害表现,未发现退钉、钢板松动。Neer肩关节功能评分:优19例,良10例,可6例。结论 T 形切口下微创锁定钢板治疗肱骨近端骨折具有创伤小、功能恢复快、临床疗效佳的优点,尤其适于 AO 分型的A2、A3型和B型骨折的治疗。%Background With the aging of population,the proximal humerus fractures are becoming more and more common.The displaced proximal humeral fractures often result in long-term disability.For the instability and displacement of the fracture,the operation treatment is of the best effect so far.At present,the locking plate has been widely used in the treatment of proximal humerus fractures,and has already achieved good clinical results.This paper retrospectively analysis the functional effect of minimally invasive locking plate in the treatment of proximal humeral fractures in our hospital with T shape incision.Methods Thirty-five cases in our hospital suffered from proximal humeral fractures were included in this study (16 males,19 females,aged 31-72 years old)during the past years.The average age was 56.3 years old.Fifteen cases were injured on the left side,20 cases were injured on the right side.All the fractures were fresh.The cause of injury:20 cases were living accident,6 cases were of high falling inj ury,9 cases were of traffic

  13. Femoral Locking Compression Plate (LCP)for the Subtrochanteric Fractures in Children%股骨锁定加压钢板(LCP)在儿童股骨转子下骨折中的应用

    Institute of Scientific and Technical Information of China (English)

    蔡文全; 覃佳强; 南国新; 王忠良; 宿玉玺; 张德文

    2014-01-01

    Objetive To study the clinical effect of the femoral locking compression plate (LCP)in children femoral subtrochanteric fracture. Methods 22 cases of femoral subtrochanteric fracture in children diagnosed in our hospital from February 201 0 to December 201 2 were analyzed retrospectively,including 1 6 ca-ses of male,6 cases of female,with an average age of 8.5.Results All of the 22 cases received follow-ups ranging from 6 to 48 months (27 months in average);osseous healing was found in all these 22 cases of frac-ture,without broken nails,nail,loose steel plate,broken board or coax vara,articular dyskinesia,etc. Con-clusion Application of femoral locking compression plate (LCP)for children femoral subtrochanteric fractures can effectively improve the deficiencies of the traditional conservative treatments including traction,k-wire,ti-tanium elastic nail fixation and other therapies,and can achieve a better effect through early functional exercise to reduce joint rigidity.%目的:探讨股骨锁定加压钢板(LCP)对儿童股骨转子下骨折的临床疗效。方法回顾性分析本院2010年2月至2012年12月收治的22例股骨转子下骨折患儿临床资料,其中男16例,女6例,平均年龄8.5岁。结果22例均获得随访,随访时间6~48个月,平均27个月,22例均骨性愈合,无断钉、脱钉、钢板松动、断板及髋内翻、关节活动障碍等并发症发生。结论股骨锁定加压钢板(LCP)对于儿童股骨转子下骨折可以有效改善传统保守牵引、克式针、弹性髓内钉固定及其他治疗方法的不足,可早期进行功能锻炼,减少关节僵直,效果良好。

  14. Analysis on locking proximal hummers plate for treatment of proximal humeral fractures in elderly%肱骨近端锁定钢板治疗老年肱骨近端骨折的疗效分析

    Institute of Scientific and Technical Information of China (English)

    杜区成; 戴小玲; 柯文坤; 李明

    2014-01-01

    Objective:To investigate the locking plate minimally invasive treatment of proximal humeral fractures in elderly patient’s clinical efficacy and safety. Methods: The elderly in our hospital and proximal hummers fracture patients were randomly divided into control and treatment groups. All patients received the same preoperative therapy, the control group received conventional steel surgical treatment, the use of steel plate or intramedullary nail fixation; patients treated with minimally invasive surgery locking plate line , groups of patients received the same postoperative treatment and care. Results: The patients treated with surgery time is slightly lower than the control group , but the difference was not statistically significant (P>0.05), while patients treated with fracture healing time and blood loss were lower than the control group, the difference was statistically significant (P0.05);treatment group patients total efficiency (84.4%) was higher (59.4%) , the difference was statistically significant (P<0.05);patients treated with various common adverse events were lower than the control group, the difference was statistically significant (P<0.05). Conclusion:Using locking plate for treatment of proximal humeral fractures in elderly patients clinical effects, adverse reactions, worthy of promotion.%目的:探讨锁定钢板微创治疗老年肱骨近端骨折患者的临床效果和安全性。方法:将老年肱骨近端骨折患者并随机分为对照组和治疗组。所有患者接受相同的术前治疗后,对照组接受常规钢板手术治疗,使用钢板或髓内钉固定;治疗组患者使用微创锁定钢板行微创手术治疗,两组患者接受相同的术后治疗和护理。结果:治疗组患者手术时间稍低于对照组,其差异无统计学意义(t=7.766,P>0.05),而治疗组患者的骨折愈合时间和术中出血量均低于对照组,其差异有统计学意义(t=8.439,t=12.380;P<0.05);治疗

  15. 密柱钢板深梁结构抗震性能试验研究%Experimental study on seismic behavior of structure with dense columns-deep steel plate beams

    Institute of Scientific and Technical Information of China (English)

    董宏英; 张力嘉; 曹万林; 乔崎云; 刘恒超

    2015-01-01

    提出了一种内藏密柱钢板深梁混凝土组合剪力墙,密柱钢板深梁为其核心钢构.为研发高性能密柱钢板深梁结构,对4个具有不同设计参数的试件进行了低周反复荷载试验.试件的密柱分为方钢管混凝土、圆钢管混凝土、工字钢3种截面,钢板深梁分为Q235,Q345两种钢材,试件剪跨比为1.5.基于试验,分析了各试件的承载力、刚度及退化过程、延性、滞回特性、耗能、损伤与破坏过程,提出了密柱钢板深梁结构承载力计算模型,计算结果与实测结果符合较好.研究结果表明:“强密柱、弱钢板深梁”型结构可实现延性屈服机制;密柱截面用钢量相同时,采用圆钢管混凝土密柱的结构性能最好;与采用Q345钢板深梁的结构相比,采用Q235钢板深梁的结构虽承载力略小但延性更好;密柱钢板深梁结构具有良好的抗震性能和延性屈服机制.%The composite concrete shear wall embedded with dense columns-deep steel plate beams as the core structure was proposed.In order to investigate a high-performance structure with dense columns-deep steel plate beams, low cyclic loading experiments were carried out on four specimens with different design parameters.Three section styles, including concrete filled square steel tube col-umn, concrete filled circular steel tube column, and I-section steel column, were adopted for dense columns.The steel strengths of deep beams included two grades, Q235 and Q345.The shear span ratios of all the specimens were 1.5.Based on the experiments, the load-bearing capacities, stiffness and deterioration processes, ductilities, hysteretic behaviors, energy dissipations, damage and failure processes of specimens were analyzed.The load-bearing capacity calculation model was established, and the calculation results were in good agreement with the test results.The investigation results show that the structure with“strong columns

  16. 肱骨近端交锁髓内钉和锁定接骨板治疗肱骨近端骨折的生物力学研究%Biomechanical investigation on current fixation options for proximal humerus fractures:locked intramedullary nail and locked plate

    Institute of Scientific and Technical Information of China (English)

    周君琳; 赵会; 秦永超; 陆铁

    2016-01-01

    Background Proximal humeral fracture is a common fracture in elderly patients with osteoporosis,locking plate and intramedullary nail fixation are the most popular methods for its surgical treatment at present.There are advantages and disadvantages for both methods of internal fixation treatment.Currently,the choice of internal fixation method is a problem faced by traumatic orthopedic doctors. In this study we used proximal humeral locking plate or interlocking intramedullary nail for fracture fixation in vitro human samples with anticorrosive treatment tosimulate theload condition of shoulder joint after internal fixation,measured and calculated the axial load and stiffness of the fracture model,and discussed the fixed strength of the two internal fixation devices.We also analyzed the characteristics of these two kinds of internal fixation methods from the perspective of biomechanics.Methods (1)Selection of humeralsamples.A total of 36 humeralsamples with antiseptic treatment wereselected from 18 specimens of 60-85 years old,including 14 male samplesand 22 female samples.The X-ray films of the samples were taken to exclude congenital deformity,fracture and tumor.We appliedUnigamma X-ray Plus bone mineral density instrument to measure bone mineral density (humeral head area were unified delimited),results in each group were recorded for variance analysis.(2)Construction of fracture model with internal fixation.According to Neerclassification and the method introduced by Kwon,we produced three-partproximal humeral fracture model.We cut the humeral head with a oscillating saw at the surgical neck plane,the thickness of saw blade was 1 mm,confirmed the position of intertubercular sulcus on the osteotomy plane,then saw the bone along intertubercular sulcus to the distal humerus, thedirection is perpendicular to the osteotomy plane,until to the base of the lesser tubercle level,cut the greater tuberosity from proximal humerusat the base of lesser tuberosity

  17. Shaking table test study on shear walls with concrete-filled steel tube columns and embedded steel-plate%钢管混凝土边框内藏钢板剪力墙振动台试验研究

    Institute of Scientific and Technical Information of China (English)

    曹万林; 王尧鸿; 董宏英; 张建伟

    2011-01-01

    进行了4个钢板剪力墙模型的模拟地震振动台试验,其中2个模型为钢管混凝土边框钢板剪力墙,高宽比分别为1.7和3.2;2个模型为钢管混凝土边框内藏钢板剪力墙,高宽比分别为1.7和3.2.试验中输人Taft地震动,测试了各试件在不同峰值加速度下的时程地震反应和动力特性,分析了剪力墙的破坏特征.研究表明:钢管混凝土边框内藏钢板混凝土剪力墙与钢管混凝土边框钢板剪力墙相比,地震反应明显较小,抗震性能显著提高.%Four steel-plate shear walls were tested on the shaking table. Two of the walls are steel-plate shear walls with concrete-filled steel tube columns and the other two are composite shear walls with concrete-filled steel tube columns and embedded steel-plate. The ratio of height to width is 1.7 and 3.2 respectively. The Taft seismic ground motion was input in the shaking table test. Based on the experiment, dynamic characters, dynamic responses and failure modes of the four specimens in different seismic peak accelerations are contrastively analyzed. The results show that compared with the steel-plate shear walls with concrete-filled steel tube columns, shear walls with concrete-filled steel tube columns and embedded steel-plate have the following characteristics: the dynamic responses are significantly reduced, the seismic behavior is significantly improved.

  18. 锁定钢板治疗老年肱骨外科颈骨折%Locking Plate in the Treatment of Surgical Neck Fractures of Humerus in Elderly Patients

    Institute of Scientific and Technical Information of China (English)

    胡北

    2015-01-01

    Objective To study the analysis of proximal humerus locking plate in the treatment of humerus surgical neck fracture healing. Methods This study selected 50 cases of elderly patients with humerus surgical neck fracture were from our hospital in October 2013~December 2014 during hospitalization in patients undergoing surgery, to select al of the old age patients with humerus surgical neck fracture treated by those who did the same personnel row locking plate, postoperative fol ow-up for 9 months. Statistical treatment ef ect. Results Al patients with postoperative wound infection, not fracture malunion or don't heal as wel as the internal fixation of fracture, loose;To recover the shoulder function evaluation standard reference Neer criteria for evaluation the curative ef ect of al of the patients;Its specific function recovery is:23 cases, 19 cases, 6 cases, 2 cases, fine rate was 84%. Conclusion Locking proximal humeral plate treatment has a good treatment and humerus surgical neck fracture fixed ef ects, and joint function recovered wel and fracture end good healing of fracture, fewer complications, early functional exercise can help patients and restore injured limb function, is a good surgical treatment method, is worthy of clinical promotion.%目的探讨分析肱骨近端锁定钢板治疗老年肱骨外科颈骨折的临床治疗效果。方法本次研究选取的50例老年肱骨外科颈骨折患者均来自我院2013年10月~2014年12月的住院接受手术治疗的患者,对选取的所有老年肱骨外科颈骨折患者均由同一手术组人员行锁定钢板手术治疗,术后进行随访9个月。统计治疗效果。结果术后所有患者都未发生伤口感染、骨折畸形愈合或不愈合以及内固定断裂、松动;对于肩关节功能的恢复评价标准参照Neer评分标准对所有患者的疗效进行评定;其具体功能恢复情况为:优23例,良19例,可6例,差2例,优良率为84%。结论肱骨近

  19. 锁定板微创治疗肱骨近端骨折短期临床观察%Early Clinical Observation of Minimally Invasive Treatment of Proximal Humerus Fractures with the Locking Proximal Humerus Plate

    Institute of Scientific and Technical Information of China (English)

    王胜利; 肖亮; 郭庆功

    2013-01-01

    Objective:The aim of this paper was to evaluate early results of proximal humerus fractures with the locking proximal humerus plate. Method:In this paper we retrospectively reviewed the records and radiographs of 36 patients(25 males and 11 females)with proximal humerus fractures. These cases were treated with the locking proximal humerus plate. The fractures were reduced by the transdeltoid lateral approach using minimally invasive surgery. Passive and active exercises were initiated on the second postoperative day. The results were assessed using the Constant-Murley shoulder scoring system. Result:All cases were followed up. The average time of follow-up was 15 months(range 12 to 17 months). Radiographically,union was observed in the most cases at the end of 10 weeks. In one case non union was observed and it was grafted with an autogenous graft. Acording to Constant-Murley should scoring system,the results were very good in 22 cases,good in 9 cases,mean in 4 cases,poor in 1 cases. Conclusion:It is an effective technique to minimally invasive treatment of proximal humerus fractures with the locking proximal humerus plate to deal with proximal humerus fractures.%  目的:评估运用肱骨近端锁定加压钢板微创治疗肱骨近端骨折的短期疗效。方法:本文回顾了36例运用肱骨近端锁定加压钢板治疗肱骨近端骨折患者的病案和影像资料。且本组病例均采用三角肌外侧微创外科入路反向置入钢板。术后第2天开始进行被动及主动功能锻炼。肩关节功能按照 Constant-Murley 肩关节评分标准进行评估。结果:所有患者均获得随访,平均15个月。后10周通过 X 线片观测多数病例的骨折愈合情况。仅1例发现不愈合后行自体骨移植术。根据 Constant-Murley 肩关节评分标准,优22例,良9例,中4例,差1例。结论:肱骨近端锁定加压钢板微创技术是治疗肱骨近端骨折的一种有效方法,可获得满意短期疗效。

  20. Nursing of Intertrochanteric Fracture with Osteoporosis by Proximal Femoral Locking Compression Plate%骨质疏松性股骨转子间骨折患者锁定加压钢板固定治疗的护理

    Institute of Scientific and Technical Information of China (English)

    王秀

    2011-01-01

    Objective To evaluate the nursing measures of intertrochanteric fracture and osteoporosis by proximal femoral locking compression plate.Methods Twenty-nine patients with the intertrochanteric fracture and osteoporosis by proximal femoral locking compression plate were reviewed for the psychological nursing, dietary nursing and effects of rehabilitation and training before and after treatment from February 2006 through October 2009.Results The postoperative follow ranged from 6 to 36 months(mean 18.31±6.43 months).The postoperative ambulation ranged from 3 to 15 days(mean 9.00±2.42 days).The time of fracturehealing ranged from 12-30 weeks(mean 14.85±2.21 weeks).Deep vein thrombosis of the lower extremity and minor coax vara occurred in one ant two patients respectively.The good and excellent rate of postoperative function was 93.10% according to Sander's standard.Conclusion Proximal femoral locking compression plate is effective for the intertrochanteric fracture with osteoporosis, which has the advantages of minimal invasiveness and little blood loss.It is especially suitable for elder patients.Positive psychological interventions, proper rehabilitation, routine follow up, and anti- osteoporosis treatment play essential roles in lessening bed time and improving the postoperative life quality.%目的 探讨骨质疏松性股骨转子间骨折患者股骨近端锁定加压钢板内固定手术前后的护理措施.方法 回顾性总结2006年2月至2009年10月29例采用股骨近端锁定加压钢板内固定手术治疗骨质疏松性股骨转子间骨折患者的心理护理、饮食护理、术前后康复训练及效果.结果 29例患者术后随访6~36个月,平均(18.31±6.43)个月.术后离床时间3~15 d,平均(9.00±2.42)d;骨折愈合时间12~30周,平均(14.85±2.21)周.出现下肢深静脉血栓1例,轻度髋内翻2例.按照Sander评分标准,优良率为93.10%.结论 股骨近端锁定加压钢板是治疗骨质疏松性股骨转子间

  1. Volar locking compression plate combined with artificial bone grafting for treatment of comminuted distal radial fracture%掌侧锁定加压接骨板结合人工骨植骨治疗桡骨远端骨折

    Institute of Scientific and Technical Information of China (English)

    周凯龙; 王培吉

    2014-01-01

    目的 探讨应用掌侧锁定加压接骨板(LCP)结合人工骨植骨治疗桡骨远端粉碎性骨折的临床疗效.方法 2011年1月至2013年8月期间在我院行掌侧LCP结合人工骨植骨,治疗A3、C2、C3型桡骨远端粉碎性骨折45例.术前及术后测量掌倾角、尺偏角、桡骨轴向短缩及关节面台阶程度.结果 所有患者均获得6~18个月的随访,平均12个月,骨折均获得骨性愈合,人工骨无不良反应;各影像学数据较术前均有明显改善;按Gartland-Werley评分标准评定,A3型优良率为94.4%、C2型优良率为87.5%、C3型优良率为81.8%.结论 应用掌侧LCP结合人工骨植骨治疗A3、C2、C3型桡骨远端粉碎性骨折,能够恢复桡骨长度,获得坚强内固定.%Objective To investigate the clinical results of the application of volar locking compression plate combined with artificial bone grafting in the treatment of comminuted distal radial fractures.Methods From January 2011 to August 2013,45 cases of type A3,type C2 and type C3 comminuted distal radial fractures were treated with volar locking compression plate combined with artificial bone grafting.All the cases were closed fractures with radial shortening or articular surface collapse.Volar tilt angle,radial inclination angle,axial shortening of the radius and extent of joint surface step deformity were measured both pre and post operatively.Results All the patients were follow-up for 6 to 18 months,with an average of 12 months.Bone union was noted in all the cases.There was no adverse reaction to the artificial bone grafts.Radiographic parameters were significantly improved.The clinical results were evaluated using the Gartland-Werley wrist score and rated as excellent and good in 94.4% of type A3 fractures,87.5% of type C2 fractures,and 81.8% of type C3 fractures.Conclusion Applying volar locking compression plate combined with artificial bone grafting can achieve rigid fixation and restore radial length in

  2. Tratamento das fraturas femorais subtrocantéricas com placas de bloqueio lateral da parte proximal do fêmur The treatment of femoral subtrochanteric fractures with the proximal lateral femur locking plates

    Directory of Open Access Journals (Sweden)

    Sun-Jun Hu

    2012-12-01

    Full Text Available OBJETIVO: Estudar o desfecho de fraturas subtrocantéricas de quadril tratadas com placa de bloqueio lateral da parte proximal do fêmur. MÉTODO: Revisamos retrospectivamente os resultados clínicos de 48 casos de fraturas subtrocantéricas tratadas com placas de bloqueio lateral da parte proximal do fêmur de janeiro de 2008 a maio de 2010. Registrou-se o progresso da consolidação da fratura, assim como a ocorrência de complicações. A função da articulação do quadril foi avaliada pelo índice social de Harris e o escore de mobilidade de Parker-Palmer, um ano após a cirurgia. RESULTADO: Quarenta e cinco pacientes foram acompanhados até a união da fratura ou a revisão da cirurgia. Entre os 45 pacientes, 43 atingiram a união da fratura sem outra intervenção. Trinta e oito fraturas consolidaram sem perda da posição no acompanhamento de um ano. Não houve casos de perfuração da cabeça do fêmur pelo parafuso. O escore médio do índice social de Harris foi 86,5 ± 9,8 (73 ~95. A média do escore de mobilidade de Parker e Palmer foi 7,4 ± 2,1 (3~ 9. CONCLUSÃO: A placa de bloqueio lateral da parte proximal do fêmur é o tipo de fixação interna estável e efetiva para tratar as fraturas subtrocantéricas de quadril e tem a vantagem de fixação estável, em especial em fratura da parede lateral do fêmur. Nível de evidência IV, Série de Casos.OBJECTIVE: To study the outcome of subtrochanteric hip fractures treated by using a proximal lateral femur locking plate. METHOD: We retrospectively reviewed the clinical results of 48 cases of femoral subtrochanteric fractures treated with proximal lateral femur locking plates from Jan 2008 to May 2010. The progress of fracture healing, as well as the occurrence of complications, was recorded. The function of the hip joint was evaluated by Harris social index and the Parker and Palmer mobility score at 1 year after the operation. RESULT: 45 patients were followed up until fracture

  3. Treatment of long unstable femoral intertrochanteric fractures with locking plate and cable rope%锁定钢板及缆绳联合治疗老年长段粗隆骨折

    Institute of Scientific and Technical Information of China (English)

    杨玉宝; 阚金庆; 高忠礼; 李林

    2012-01-01

    目的:探讨锁定钢板和缆绳治疗老年长段粗隆间骨折的临床疗效.方法:自2004年6月至2010年6月治疗26例老年长段粗隆间骨折,男16例,女10例;年龄50~65岁,平均(58.23±4.45)岁.车祸伤22例,其中10例合并其他复合伤;坠落伤4例.Evans分型:I型21(顺转子型),其中Ia型8例,Ib型10例,Ic型2例,Id型1例;Hrd型(逆转子型)5例.26例中均采用锁定钢板及缆绳固定治疗,髋关节功能根据Harris评分.结果:26例均获得随访,时间9~18个月,平均15个月.手术顺利,术后7~14d下地无负重功能锻炼,6周逐渐负重功能锻炼,12周后逐渐完全负重.髋关节功能Harris评分,疼痛(39.79±6.54)分,功能(31.08±9.45)分,畸形及活动(3.85±0.46)分,总分(77.31±13.97)分;结果优10例,良13例,可3例.结论:锁定钢板及缆绳适合治疗老年长段涉及粗隆Evans分型的各种类型骨折,尤其是骨质疏松患者取得较好临床效果.%Objective: To investigate clinical effect of long unstable femoral intertrochanteric fractures with locking plate and cable rope. Methods: From June 2004 to June 2010, twenty-six elderly patients with long unstable femoral intertrochanteric fractures were treated locking plate and cable rope fixation, included 16 males and 10 females with an average age of (58.23?4.45) years ranging from 50 to 65 years. There were 22 cases for traffic accident, 10 of them for traffic accident with other injury; 4 cases for falling injury. According to Evans classification, 21 cases were in type I, among them 8 in type la, 10 in type Ib, 2 in type Ic, 1 in type Id; the other 5 cases were type Hrd. Hip function scores were recorded to evaluate the treatment outcomes by Harris hip function score system. Results: Twenty-six cases were followed-up for 9 to 18 months (means 15 months). The operations were successful. All the patients received functional training for walking without weight loading from 7 to 14 days after operation , and walking

  4. Features of Three- and Four-Part Proximal Humeral Fractures and Outcome of Internal Fixation Using the Philos® Locking Plate

    Directory of Open Access Journals (Sweden)

    Ali Sadighi

    2017-03-01

    Full Text Available Background: Proximal humeral fractures are among common types of fractures and remain a challenging issue for surgical management. This study aimed to assess the clinical outcomes and complication rates of three- vs. four-part proximal humeral fractures, treated with internal fixation using the Philos® plate. Material and Methods: In this cohort study, a total of 30 consecutive patients with three-part or four-part proximal humeral fractures based on the Neer classification were included. Surgical treatment was performed with open reduction and internal fixation using the Philos® plate. The constant score was evaluated 6 months later in follow-up. The P<0.05 was considered significant. Results: Four-part fractures were mainly caused by trauma from above, while insults of opposite direction were responsible for more than half of 3 part fractures (P=0.01. Open fractures were only observed in patients with a four-part fracture (P=0.018. No significant differences were noticed regarding gender, cause, and side of the fracture. The presence of other fractures, fracture of the implant, reduction loss, avascular necrosis (AVN of humerus head, rotator cuff injury, and revision surgery were significantly higher in patients with four-part fractures. The mean constant score was 81.40±11.61 and 65.09±16.09 for three-part and four-part fractures, respectively (P=0.006. Conclusion: Open reduction and internal fixation with Philos® plate yield acceptable results in both types of fractures, however, the prognosis of this intervention is poorer four-part fractures.

  5. The experience of humerus surgical neck fracture with proximal humeral locking plate%锁定钢板治疗肱骨外科颈骨折临床疗效研究

    Institute of Scientific and Technical Information of China (English)

    曾强

    2013-01-01

    目的探讨肱骨近端锁定钢板(LPHP)治疗肱骨外科颈骨折的临床疗效。方法将78例肱骨外科颈骨折患者随机分为两组,试验组采用LPHP治疗,对照组采用克氏针内固定治疗,对比两组的治疗效果。结果试验组骨折愈合时间为(6.20±0.95)个月,快于对照组的(7.44±0.98)个月(P<0.05)。试验组患者Neer评分的总优良率为87.50%,显著高于对照组的65.79%(P<0.05)。结论肱骨近端锁定钢板固定治疗肱骨外科颈骨折疗效肯定,值得进一步推广。%Objective To investigate the therapeutic effect of humerus surgical neck fracture with proximal humeral locking plate. Methods 78 patients of humerus surgical neck fracture were randomly divided into two groups. The experimental group was treated by LPHP treatment. The control group was treated by Kirschner. Then comparing to the therapeutic effect of the two groups. Results Fracture healing time of the experimental group was (6.20±0.95) months. It was faster than the control group (7.44±0.98) months (P < 0.05). Neer score excellent and good rate of the experimental group was 87.50%, significantly higher than 65.79% of the control group (P<0.05). Conclusion The efficiency that proximal humeral locking plate was used to treat humerus surgical neck fracture is certain. So it is worthy of future promotion.

  6. Treatment of unstable femoral intertrochanteric fractures with locking proximal femoral plate%锁定接骨板治疗不稳定性股骨转子间骨折

    Institute of Scientific and Technical Information of China (English)

    侯振海; 施建国; 姚远; 叶虹; 郑隆宝; 倪志明; 姚军

    2009-01-01

    Objective To investigate the efficacy of locking proximal femoral plate (LPFP) in treatment of unstable femoral intertrochanteric fractures. Methods A total of 32 patients with unstable femoral intertrochanteric fractures were operated via Watson-Jones approach. According to the Evans classification, there were 16 patients with type Ⅲ fractures, 10 with type Ⅳ fractures and 6 with type Ⅴ fractures. The data of bone healing time and hip function scores according to Harris hip function score system were recorded for evaluating treatment outcomes. Results All the patients were followed up for an average 12.5 months, which showed fracture union within mean 10.4 weeks. There were no hip varus deformation, internal fixation failure and avaacular necrosis of femoral head, with total excellence rate of 84% according to Harris hip function score system. Conclusions LPFP is characterized by correspondence with configuration of proximal femur, stable fixation, less disturb to blood supply of femoral head, and hence is an effective treatment method for unstable femoral intertrochanteric fractures.%目的 总结股骨近端锁定接骨板(locking proximal femoral plate,LPFP)治疗不稳定性股骨转子间骨折的临床疗效. 方法股骨不稳定性转子间骨折32例,根据Evans分型:Ⅲ型16例,Ⅳ型10例,Ⅴ型6例.采用LPFP固定.观察骨折愈合情况,参照Harris髋关节评分系统评定术后患髋功能. 结果全部32例患者获得平均12.5个月随访,所有骨折均愈合.无髋内翻及内固定失败,无股骨头缺血性坏死.按Harris髋关节评分标准:优良率84%. 结论 LPFP具有符合股骨近端解剖形态、固定牢靠、对股骨头血供干扰小等优点,是一种较好的固定不稳定性股骨转子间骨折的内置物.

  7. Clinical Effect of Fixation of the Older Osteoporosis Fractures of Humeral Surgical Neck Using the Locking Plate-Philos%Philos系统治疗老年骨质疏松性肱骨外科颈骨折

    Institute of Scientific and Technical Information of China (English)

    齐新文; 王兆杰; 邝立鹏; 陈军平; 俞华威; 安荣泽

    2011-01-01

    Objective To investigate the clinical effect of inter fixation of the older osteoporosis fractures of humeral surgical neck using the locking plate-Philos (Proximal humeral internal locking system) via the deltopctoral-groove approach. Methods Reduction and locking plate-Philos fixation were done via deltopctoral-groove approach on 23 cases with the older osteoporosis humeral surgical neck fractures from March 2008 to December 2010. Bone graft was applicated on 19 of 23 cases and the rotator cuff was repaired simultaneously if damaged. The medicine of anti-osteoporosis and promoting fractures healing were applied after be in hospital. Shoulder joint passive exercises was performed at 2 days after Operation.actived exercises were done gradually 2 weeks after operation. According to Neer classification.there were 4 cases of two parts fracture. 13 cases of three parts fractures and 6 cases of four parts fractures. Results The postoperative radiographs verified good position of plate and screws,with satisfactory fracture reduction and no neurovascular injury (such as axillery nerve and humeral artery) happened. Fat liquefaction happened on 4 cases. Follow-up for 6~24 months (average 9. 8 months) showed no necrosis of humeral head.no delayed-union and un-union happen, 2 cases heterotopic ossification. According to Constant Score: the rate of excellent good was 82. 6%. After 6 months,the bone mineral density SD value of patients were higher than the first BMD SD value, but this was not statistically significant (P>0. 05). Conclusion Locking plate-Philos can firmly fixe the fractures of humeral surgical neck and possessed such advantages as assistance of reduction,early exercises and less disturbance of the blood supply. This plate showed good results for fractures of humeral surgical neck.especially communited fractures and older osteoporosis patients.%目的 探讨经肌间隙入路应用Philos系统治疗老年骨质疏松性肱骨外科颈骨折的疗效.方法

  8. A rapid method for the determination of perfluoroalkyl substances including structural isomers of perfluorooctane sulfonic acid in human serum using 96-well plates and column-switching ultra-high performance liquid chromatography tandem mass spectrometry.

    Science.gov (United States)

    Salihovic, Samira; Kärrman, Anna; Lindström, Gunilla; Lind, P Monica; Lind, Lars; van Bavel, Bert

    2013-08-30

    To facilitate high-throughput analysis suitable for large epidemiological studies we developed an automated column-switching ultra-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for determination of perfluorocarboxylic acids (PFCAs; C5, C6, C7, C8, C9, C10, C11, C12, and C13), perfluoroalkyl sulfonic acids (PFSAs; C4, C6, C8, and C10), perfluorooctane sulfonamide (PFOSA), and five groups of structural perfluorooctane sulfonic acid (PFOS) isomers in human serum or plasma. The analytical procedure involves rapid protein precipitation using 96-well plates followed by an automated sample clean-up using an on-line trap column removing many potentially interfering sample components while through the mobile phase gradient the target analytes are eluted onto the analytical column for further separation and subsequent mass detection. The method was linear (R(2)method detection limits ranging between 0.01 and 0.17ngmL(-1) depending on the analyte. The developed method was precise, with repeatability (n=7) and reproducibility (n=103) coefficients of variation between 2% and 20% for most compounds including PFOS (2% and 8%) and its structural isomers (2-6% and 4-8%). The method was in conformity with a standard reference material. The column-switching HPLC-MS/MS method has been successfully applied for the determination of perfluoroalkyl substances including structural PFOS isomers in human plasma from an epidemiological study.

  9. 前路经寰枕寰枢关节锁定钛板螺钉内固定系统的匹配性研究%Compatible study of anterior occiput to axis transarticular locking plate system

    Institute of Scientific and Technical Information of China (English)

    李明; 蔡贤华; 黄卫兵; 张中

    2015-01-01

    目的:观察新型前路经枕寰枢关节锁定钛板螺钉内固定系统与枕颈复合体的匹配性,探讨此内固定系统临床应用的可行性。方法对枕颈部CT扫描数据进行三维重建,并通过数字化模拟手术进行解剖学匹配实验。通过观察钛板枢椎椎体前表面的切合性及螺钉的走行,测量经关节螺钉的理想钉道参数,评估此内固定系统与枕颈复合体的匹配性。结果钛板与枢椎椎体前表面相匹配;经关节螺钉均穿过寰枕关节及寰枢关节进入枕骨髁,无穿出骨质者,螺钉均未损伤舌下神经管。椎体固定螺钉均位于枢椎椎体骨质内,未进入椎管及椎间隙。经关节螺钉钉道理想钉道参数与内固定系统实际钉道参数差异无统计学意义。结论前路经寰枕寰枢关节锁定钛板螺钉内固定系统与枕颈复合体解剖学匹配性较好,具有临床应用可行性。%Objective To investigate the feasibility of anterior occiput to axis transarticular locking plate system through analyzing its compatibility with the occipital cervical complex. Methods Thirty health cases were selected from the date of head-neck CT examination randomly. 3D models of occipital cervical complex were reconstructed on the date. The anatomical compatibility was assessed between the systems and the 30 cases through surgical simulation by computer via digital technology. The morphological compatibility between the titanium plate and the surface of the axis as well as the screw trajectory were observed. The ideal screw trajectory parameters of trans- articular screws were measured so that the compatibility could be assessed. Results There was a morphological match between the titanium plate and the surface of the axis. All the trans-articular screws passed through the atlanto-occipital articulation and the atlanto-axial articulation, without piercing the bones or going into the hypoglossal canal. The fixed screws were in the

  10. Biomechanical and clinical researches of cervical spine locking plate for treatment of cervical bursting fracture%颈椎前路带锁钢板治疗颈椎爆裂骨折的试验及临床研究

    Institute of Scientific and Technical Information of China (English)

    陈福文; 周密; 贾连顺; 张树明; 王剑平; 宋迪煜; 朱方正; 朱泽兴

    2012-01-01

    Objective To evaluate the stability and clinical feasibility of cervical spine locking plate (CSLP)for the treatment of cervical fractures. Methods Six fresh cadaver cervical specimens (from C2-6) were used for test. The normal three -dimension motions of C3_5 segments were measured on a three-dimensional spinal motion test machine. Then C4 bursting fracture models were built to measure the range of motions (ROM). Iliac bony grafts were implanted and the ROM were tested once more. Finally the injured segments were fixed with AO cervical spine locking plate to measure the ROM. Thirty-two cases of lower cervical spine fractures were treated surgically with anterior decompression and fusion, and were internally fixed with CSLP. Results After bony implantation and CSLP fixation, the ROM of cervical spines in flexion/extension, left/right bending, and left/right axial rotation reduced significantly. Compared with normal ROM, flexion/extension and left/right bending were reduced significantly while left/right axial rotation didn't change significantly. After 6-48 months follow-up, all fracture were reduced completely and implanted bone was fused. Postoperative X-ray showed plates and screws were in their correct position, no loosening and breakage of both plates and screws was found. Conclusion CSLP is an ideal fixation apparatus for treatment of cervical fracture in cervical spine and can restore stability in three-dimensional ROM.%目的 评价颈椎前路带锁钢板固定系统(CSLP)治疗颈椎骨折的稳定性及临床有效性.方法 将6具新鲜成人颈椎标本(C2~6)置于脊柱三维测量仪上测定C3~5节段的ROM,制造C4爆裂骨折,测定其三维运动变化后分别进行植骨、植骨+CSLP固定,并重复测量其三维运动.对32例下颈椎骨折行前路减压融合,并以CSLP进行内固定治疗.结果 植骨+CSLP固定后在屈伸、侧弯、旋转方向较损伤后明显下降,与正常值相比,屈伸和侧弯运动均明显减少,但

  11. Two kinds of locking plate for treatment of proximal humerus fractures in the elderly%两种锁定钢板置入内固定治疗老年肱骨近端骨折

    Institute of Scientific and Technical Information of China (English)

    陈立; 赵弟庆; 杨广忠; 陈刚

    2013-01-01

    背景:肱骨近端内固定锁定系统(proximal humeral internal locking system,PHILOS)和肱骨近端锁定钢板(locking proximal humerus plate,LPHP)均作为内固定锁定钢板,用于治疗肱骨近端骨折疗效显著,但目前尚不能肯定PHILOS和LPHP治疗老年肱骨近端骨折哪个更具优势?  目的:探讨比较PHILOS和 LPHP这两种锁定板治疗老年肱骨近端骨折的近期疗效。  方法:回顾性分析具有完整随访资料的61例老年肱骨近端骨折患者,根据不同治疗方法分为 LPHP 治疗组(n=27)和PHILOS治疗组(n=34)。均根据Neer分类,LPHP组二部分骨折7例,三部分骨折11例,四部分骨折9例;PHILOS组二部分骨折9例,三部分骨折14例,四部分骨折11例。记录手术时间、出血量、引流量,观察骨折愈合时间、功能恢复、并发症,并进行统计学分析。  结果与结论:61例患者全部获得随访,随访时间12-36个月(平均20.6个月),PHILOS组和LPHP组手术时间、出血量、引流量,观察骨折愈合时间、功能恢复、并发症比较,差异并无显著性意义(P>0.05)。PHILOS和LPHP治疗老年肱骨近端骨折均可获得良好的效果,随访1年时优良率分别为81.5%,82.4%;具有固定可靠、并发症少、满意率高等优点,两种锁定板目前具有较高的临床应用价值,是治疗移位和不稳定老年肱骨近端骨折有效的切开复位内置物。%BACKGROUND:Proximal humeral internal locking system (PHILOS) and locking proximal humerus plate (LPHP) are both new types of internal fixation plates, and have satisfactory effects in the treatment of proximal humerus fractures. However, which is better? OBJECTIVE:To compare the short-term efficacy of PHILOS and LPHP in the treatment of elderly patients with proximal humeral fractures. METHODS:The fol ow-up data of 61 elderly patients with proximal humeral fractures were retrospectively analyzed. The patients

  12. Seismic Research and Application on Embedded Steel Plate Concrete Shear Wall with Concrete Filled Steel Tube Columns%钢管混凝土边框内藏钢板组合剪力墙抗震研究

    Institute of Scientific and Technical Information of China (English)

    曹万林; 张文江; 张建伟; 董宏英; 王立长

    2011-01-01

    提出了钢管混凝士边框内藏钢板组合剪力墙.完成了 12个不同构造的钢板组合剪力墙模型的低周反复荷载试验,其中包括5个钢管混凝土边框纯钢板剪力墙、7个钢管混凝土边框内藏钢板剪力墙.分析了各试件的承载力、耗能、延性、滞回特征等.给出了部分组合剪力墙的承载力计算模型,计算结果与试验结果符合较好.研究表明,钢管混凝土边框内藏钢板组合剪力墙具有承载力高、延性好、耗能能力强、滞回性能稳定等特点.这种新型组合剪力墙已用于工程,效果良好.%The embedded steel plate concrete shear wall with concrete filled steel tube columns was proposed. The tests of 12 shear wall specimens under cyclic loading have been accomplished, including 5 specimens of pure steel plate shear wall with concrete filled steel tube columns and 7 specimens of embedded steel plate concrete shear wall with concrete filled steel tube columns. The performances of specimens such as load-bearing capacity, energy dissipation, ductility and hysteretic behavior have been investigated. Formulas for load-bearing capacity of some specimens are put forward and the calculation results agree well with the experimental ones. It is shown that the embedded steel plate concrete shear wall with concrete filled steel tube columns has excellent aseismic features of higher capacity, better ductility, larger energy dissipation and more stable hysteretic behavior. This new kind of composite shear wall has been applied to the actual projects and the received response is satisfactory.

  13. Anterior cervical locking plate combined with bone graft for cervical vertebral fractures%颈前路带锁钢板联合植骨手术治疗颈椎骨折

    Institute of Scientific and Technical Information of China (English)

    王家明

    2011-01-01

    目的探讨和评价颈前路带锁钢板联合钛网植骨治疗颈椎损伤的应用价值。方法自2003年6月至2009年5月经住院手术的13例颈椎骨折的患者行颈椎前路椎体次全切除术减压,同时带锁钢板内固定联合钛网植骨或自体髂骨植骨融合。结果全部病例得到随访,平均18个月,内固定牢靠无松脱,植骨融合,椎体高度无丢失。结论颈前路带锁钢板联合钛网植骨可即刻恢复节段高度,重建节段稳定性,手术操作简单,并发症少,解决了颈椎损伤重建的难题。%Objective To evaluate the efficacy of anterior cervical locking plate combined with bone graft for cervical vertebral fractures. Methods Totally 13 patients with cervical vertebral fracture hospitalized from June 2003 to May 2009 were treated with internal fixation of steel plate combined with fusion of titanium mesh or iliac bone autograft after the resection of anterior cervical vertebra. Results All cases were followed up for an average of 18 months. The internal fixation was stable, the bone graft fusion was well and the height of vertebra body was close to normal. Conclusion The operation can be used to recover the height and stability of vertebra body. It is an easy operation with few complications and it is conducive to the reconstruction of injured cervical vertebra.

  14. Y型锁定钢板置入治疗成人肱骨髁间骨折36例%Y-type locking plate for intercondylar fractures of the adult hunmerus in 36 cases

    Institute of Scientific and Technical Information of China (English)

    程煜方; 魏忠民; 黄方敏; 张克良; 李子熙

    2011-01-01

    背景:肱骨髁间骨折是一种复杂的关节内骨折,骨折端的显露及固定均比较困难.目的:观察经尺骨鹰嘴截骨入路Y型解剖型锁定钢板治疗肱骨髁间骨折的效果.方法:采用尺骨鹰嘴截骨入路,Y型解剖型锁定钢板治疗肱骨髁间骨折36例,男22例,女14例,年龄19-76岁,平均47岁,按AO/OTA分型:C1型8例,C2型15例,C3型13例.结果与结论:32例获得随访,随访时间为10~26个月.用改良的Cassebaum评分标准评分,优15例,良13例,中3例,差1例,优良率89.6%.尺骨鹰嘴截骨入路切口无一例感染,骨折愈合时间为2.5~4.5个月,平均3.5个月.固定后钢板未出现松动现象.结果显示用尺骨鹰嘴截骨入路Y型解削型锁定钢板治疗肱骨髁间骨折,显露范围广,固定牢靠,能有效防止骨折不愈合,可指导患者早期在CPM机上进行肘关节功能锻炼,肘关节功能恢复良好,是治疗肱骨髁间骨折的有效方法.%BACKGROUND: Jnlercondylar fracture of the humerus is a hind of complex intra-articular fractures. Fracture exposure andfixation are difficult.OBJECTIVE: To explore the surgical effect of Y-type locking plate through the approach of olecranon osterolomy onintercondylar fracture of Ihe adult humerus.METHODS: Thirty-six adult patients with intercondylar fractures of the hunmerus were treated with Y-type locking plale Ihroughthe approach of olecranon osterotomy. Including 22 mates and 14 females, aged 19-76 years. Averagely47year. According lothe AO/OTA dassificaiton. Type C1 fracture was found in 8 cases, type C2 in 15, and type C3 in 13.RESULTS AND CONCLUSION: Thirty-two cases received a follow-up of 10-26 months. According to Cassebaum scale, thefunction of the elbow showed excellent in 15 cases, good in 13 cases, fair in 3 cases and poor in 1 case, and the excellent-goodrate was 89.6%. No infection occurred. The mean time for fracture healing was 2.4 to 4.5 months, averagely 3.5 months. Thetechnique of Y-type locking plate for

  15. 长型肱骨近端锁定钢板治疗肱骨近端并肱骨干骨折★%Long proximal humeral locking compression plate treats proximal humerus and humeral shaft fractures

    Institute of Scientific and Technical Information of China (English)

    吴旭; 黄强; 蔡丰; 郭震; 姚勐炜; 杨安礼; 刘亮

    2013-01-01

    BACKGROUND:The domestic and international literatures have confirmed that the internal fixation of long proximal humeral locking compression plate has satisfactory effect on the treatment of proximal humerus fractures. OBJECTIVE:To investigate the clinical effect of internal fixation of long proximal humeral locking compression plate on the treatment of proximal humerus and humeral shaft fractures. METHODS:Sixteen cases with the proximal humerus and humeral shaft fractures were treated with long proximal humeral locking compression plate internal fixation, including seven males and nine females, aged 45-83 years old (average 71 years old). According to the Neer classification of proximal humerus, five cases had two parts of fracture, eight cases had three parts of fracture, and three cases had four parts of fracture;and according the AO classification of humeral shaft, five cases were classified as A1, six cases as B1, two cases as B2, two cases as C1 and one case as C3. Postoperatively, Constant-Murley scoring system was employed to evaluate the function of shoulder joint, and then the percentage was calculated for the corresponding evaluation. Modified Hospital for Special Surgery scoring system was adopted to evaluate the function of elbow joint. RESULTS AND CONCLUSION:Al cases were fol owed-up for 12-24 months (average 14.9 months), and al the cases had bone union in 8-17 weeks (average 12.1 weeks) after operation. Postoperatively, two cases suffered from fat liquoring, but healed after dressing. One case had the symptoms of radial nerve paralysis, one case had subacromial impingement syndrome and improved after treatment. No complications such as screw loosening, screw cut out or humeral head ischemic necrosis were observed. After treated for 12 months, the Constant-Murley score on fracture side was 76.87 in average (ranged 65-90), which was 83.41%in average (ranged 71.4%-93.8%) to the normal side, the clinical outcomes on shoulder were excel ent or good in

  16. 股骨颈自锁钉板系统的研制及其生物力学结构测试%Design and biomechanical structure evaluation of self-locking screw plate system for femoral neck fracture

    Institute of Scientific and Technical Information of China (English)

    昌耘冰; 尹东; 李凭跃

    2004-01-01

    BACKGROUND: A lot of internal fixators were used in femoral neck fracture, but they had quite a few defects in biomechanics.OBJECTIVE: To design the self-locking screw-plate(SLSP) system for the treatment of femoral neck fracture and to evaluate its biomechanical performance as well.DESIGN: A randomized controlled open trial.SETTING and PARTICIPANTS: The study was conducted in the Key Laboratory for Biomechanics, First Military Medical University. Twelve fresh cadaver specimens of human femur were used as testing materials.INTERVENTION: A new SLSP system was design based on the pathological and biomechanical characteristics of femoral neck fracture, which was composed of a main compressive screw, two affiliated screws and a self-locking plate. The specimens were divided into four groups for biomeMAIN OUTCOME MEASURES: Vertical displacement(rigidity), horizontal displacement (rigidity), counter-torsion strength and ultimate loads of femoral head after internal fixation in different groups RESULTS: The vertical displacements under 600 N vertical loads of the above four groups were(4. 25 ±0. 20), (5.58 ±0.41), (5.87 t0.35) and (6.40 ±0. 43) mm respectively, and the horizontal displacements were (1.78±0.25), (2.41±0.04), (2.42±0.25), and (2.79±0.31)mm respectively. There were statistical differences between SLSP group and the rest three groups( P < 0. 01). Compared with the torsional angle under equal 43% smaller than that of TCS group, HP group and DHS group respectively with significant differences( F = 96. 7, P < 0.01 ) . The ultimate loads and displacement of SLSP group were (3 830 ± 66) N and (7.49 ± 1.2) mm respectively significantly higher than that of the rest three groups.CONCLUSION: After the internal fixation with SLSP system in treating femoral neck fracture, the mechanical performance is superior to those of the others in vertical and horizontal displacement as well as counter-torsion strength and ultimate loads. SLSP system organically

  17. 120°儿童髋锁定加压钢板治疗儿童股骨转子下骨折%120° locking compression paediatric hip plate for femoral subtrochanteric fractures in children

    Institute of Scientific and Technical Information of China (English)

    尤瑞金; 杨德育; 黄飞; 吕宏升; 苏在权

    2016-01-01

    [目的]探讨120°儿童髋锁定加压钢板(120°Locking compression paediatric hip plate,120°LCP PHP)治疗儿童股骨转子下骨折的临床疗效.[方法] 2010年10月~2014年5月采用120°LCP PHP治疗儿童股骨转子下骨折16例.[结果]本组患儿术后随访24 ~36个月,平均(27.3±3.2)个月.无1例发生神经血管损伤、骨折端再移位、再骨折、髋内翻、骨髓炎、股骨头坏死及骨骺发育异常.骨折骨性愈合时间为8~13周,平均(10.1±1.4)周,无骨不愈合.于术后18~32周取出内固定物,平均(25.3±3.4)周.早期Beaty评分及远期Theologis评分皆为满意,术后2年Sanders髋关节评分为57 ~ 60分,平均(58.7±2.1)分,都为优,优良率为100%.[结论]120°LCP PHP治疗儿童股骨转子下骨折,具有符合儿童股骨转子下解剖及生物力学特点、固定牢固、避免损伤骨骺、骨折愈合快、并发症少、适应证广、可早期功能锻炼等优点.但存在需要切开复位、损伤相对较大、出血较多、二次手术切开取出内固定物、费用较高、切口瘢痕影响美观等缺点.%[Objective] To investigate the clinical efficacy of 120° locking compression paediatric hip plate in treatment of femoral subtrochanteric fractures in children.[Method] Sixteen skeletally immature idolescents with femoral subtrochanteric fractures were treated with 120° locking compression paediatric hip plate in our department from September 2010 to May 2014.[Result]Patients were followed up for average 27.3 ± 3.2 months (range,24 months to 36 months,average 27.3 ± 3.2 months).No complication was found,such as neurovascular injury,fracture re-displacement,re-fracture,varus deformities,osteomyelitis,osteonecrosis and epiphyseal dysplasia.Bone fracture healing time was 8 to 13 weeks,with an average of 10.1 ± 1.4 weeks,without nonunion being noted.The internal fixation was removed at 18 to 32 weeks after surgery (average 25.3 ± 3.4 weeks).Satisfactory outcomes had

  18. 后外侧锁定接骨板治疗大块后踝骨折的疗效分析%Efficacy of Posterolateral Locking Plate in the Treatment of Large Posterior Malleolar Fracture

    Institute of Scientific and Technical Information of China (English)

    胥正锋; 尹望平; 倪妙忠; 吴荣博

    2014-01-01

    目的:探讨经后外侧入路应用锁定接骨板治疗大块后踝骨折的临床疗效。方法:2010年1月-2012年6月经后外侧入路应用锁定接骨板内固定治疗后踝大块骨折患者23例,其中男性15例,女性8例;年龄32~78岁,平均年龄43.7岁;受伤至手术时间5~12d,平均7.3d。术前以石膏或跟骨牵引术固定患肢,待患肢肿胀消退后,采用后外侧入路锁定接骨板治疗后踝骨折。根据美国足踝外科协会(American Orthopedic Foot and Ankle Society ,AOFAS )的踝与后足评分标准评价踝关节功能。结果:所有患者均获得随访,随访时间14~22个月,平均17.4个月。23例患者均获得骨性愈合,无内固定松动或断裂;X线片示骨折愈合时间为术后11~21周,平均14.7周;完全负重时间为15~25周,平均17.1周;术后12个月AOFAS评分为73~94分,平均83.4分。1例患者术后第7天出现伤口浅表感染,经换药及敏感抗生素治疗后愈合,其他患者伤口愈合良好。结论:采用后外侧入路锁定接骨板治疗能在直视下对后踝进行有效复位和妥当固定,用于治疗后踝大块骨折时疗效良好。%Objective:To investigate the clinical efficacy of posterolateral locking plate in the treatment of large posterior malle-olar fracture .Methods :From January 2010 to June 2012 ,23 patients with large posterior malleolar fractures were treated by posterolateral locking plate ,including 15 males and 8 females ,all of whom aged from 32 to 78 years with an average age of 43 .7 years .The average time from injury to operation was 7 .3 days ,which ranged from 5 to 12 days .Calcaneal traction fixa-tion or plaster was performed on the injured limb before operation .Once that swelling reduced ,all patients were treated by posterolateral locking plate and were assessed with the ankle hindfoot clinical rating system of the American Orthopaedic Foot and Ankle Society (AOFAS

  19. Study of transient flow in fuel element of tubular plates. Accident: Shaft locking of primary cooling pump without opening the emergency gate; Estudio del regimen transitorio en el elemento combustible de placas tubulares. Accidente: Agarrotamiento de la bomba. No se abre la compuerta

    Energy Technology Data Exchange (ETDEWEB)

    Aguilas, F.; Moneva, M. A.; Garcia Ramirez, L.; Lopez Jimenez, J.; Diaz Diaz, J.

    1971-07-01

    It is analysed the thermal distribution of a fuel element of tubular plates irradiated in the JEN-1 reactor in the case of shaft locking of the primary cooling pump without opening the emergency gate. The fuel element hottest channel is studied in the position of maximum neutronic flux for three reactor power levels: 3 Hw (maximum reactor power), 2 Mw and 1 Hw. (Author) 8 refs.

  20. [Experience with Poly Ether Ether Ketone (PEEK) cages and locking plate for anterior cervical fusion in the treatment of spine trauma without cord injury].

    Science.gov (United States)

    Delépine, F; Jund, S; Schlatterer, B; de Peretti, F

    2007-12-01

    The purpose of this study was to determine whether spinal fusion using radiotransparent cages can be an appropriate treatment for traumatic injury of the cervical spine. This series included 30 patients aged 17-84 years (average 46 years) treated between October 1999 and June 2003 for traumatic injury of the cervical spine without neurological deficit or cord injury. There were two bifocal cases so that the study concerned 32 fusions. Injuries were: tear drop (n=1), serious flexion sprain (n=8), biarticular dislocation (n=4), serous hyperextension sprain (n=4), dislocation-fracture (n=1), uniarticular fracture (n=7), fracture-separation of the facet joints (n=4), post-traumatic herniation (n=3). For each injury, we measured pre and postoperatively and at last follow-up: the intersomatic angle, anterior displacement, and height of the intersomatic space at the center of the intervertebral disc. All x-rays were read twice, by two independent investigators. In the event of disagreement, the x-rays were read again by a senior surgeon and the main author of this article. Anterior fusion was achieved using a Poly Ether Ether Ketone (PEEK) (32%) and knitted carbon (68%) cage (cologne, Ostapek, Nexis) filled with cancellous bone harvested percutaneously from the iliac crest. The cage was associated with an anterior titanium plate fixation (Senegas, Euros and Orion, Medtronic). A posterior approach was associated if further stability was required (n=4 fusions). All patients were reviewed at minimum five months follow-up. Intersomatic fusion was verified on the standard x-rays (plus stress images and computed tomography at three months). Fusion was considered to be achieved if continuous bone lines crossed the graft and angle measurements remained stable, with the cage in the same position on successive examinations. One patient died from lung cancer five months after spinal fusion. All other patients survived with a mean follow-up of 24 months. Fusion was achieved in all

  1. Comparison of the Clinical Efficacy of the Proximal Humerus Pressure Plate With Traditional Steel Locking Proximal Humeral Fractures%比较肱骨近端加压锁定钢板与传统钢板治疗肱骨近端骨折的临床疗效

    Institute of Scientific and Technical Information of China (English)

    杜杰; 廖彦生; 袁春晓

    2016-01-01

    目的:探讨肱骨近端加压锁定钢板与传统钢板治疗肱骨近端骨折的临床疗效。方法将78例肱骨近端骨折患者随机分为观察组(n=39)和对照组(n=39),观察组采取肱骨近端加压锁定钢板治疗,对照组应用传统钢板治疗,比较两组患者治疗效果。结果观察组并发症发生率、骨折愈合时间均优于对照组(P<0.05)。结论与传统钢板治疗方案相比,肱骨近端加压锁定钢板治疗肱骨近端骨折的临床效果更佳。%Objective To investigate the clinical efficacy of proximal humeral locking plate and the pressure plate of traditional treatment of proximal humeral fractures. Methods 78 cases of proximal humerus fractures were randomized into two groups (n=39) and control group (n=39), the observation group was taken the pressure locking proximal humerus plate treatment, control group was taken conventional plating treatment, compared outcomes in two groups.ResultsThe incidence of complications, healing time were better than the control group (P<0.05).Conclusion Compared with the traditional steel regimen, the clinical effect of locking proximal humerus plate for treatment of pressure proximal humerus fractures is better.

  2. Comparison of the efficacy of double locking plate and Y plate in the treatment of type C inter-condylar humeral fracture%双锁定钢板与Y型钢板治疗C型肱骨髁间骨折的疗效对比

    Institute of Scientific and Technical Information of China (English)

    汪文录; 王春喜

    2016-01-01

    目的:比较双锁定钢板与 Y 型钢板内固定治疗 C 型肱骨髁间骨折的临床效果。方法选择2011年12月至2014年10月 C 型肱骨髁间骨折患者32例,随机分为观察组(双锁定钢板组)和对照组(Y 型钢板组),每组16例,观察组患者给予双锁定钢板内固定治疗,对照组患者给予 Y 型钢板内固定治疗,比较两组患者的手术时间、术中出血量、住院时间及肘关节功能。结果两组患者手术时间、术中出血量、住院时间比较差异均未见统计学意义(P ﹥0.05);观察组患者肘关节功能恢复优10例,良4例,可1例,差1例,优良率为87.50%;对照组患者肘关节功能恢复优7例,良4例,可3例,差2例,优良率为68.75%;观察组患者肘关节功能恢复优良率高于对照组(P ﹤0.05)。结论双锁定钢板治疗 C 型肱骨髁间骨折可提供坚强的内固定,有利于患者术后肘关节功能恢复,减少并发症。%Objective To compare the clinical effect of double locking plate and Y plate internal fixation in treatment of type C intercondylar humeral fractures. Methods From November 2011 to Octo-ber 2014,the 32 cases of type C intercondylar humeral fractures were randomly divided into two groups, the observation group(double locking plate group)and the control group(Y plate group),with 16 cases in each group. The observation group was treated by double locking plate internal fixation,and the control group was treated by Y plate internal fixation. The operation time,bleeding volume and hospitalization time and elbow joint function were compared between the two groups. Results By follow-up of 12 -24 months(mean,15. 6 months)for 32 cases,there was no significant difference in operation time, bleeding volume and hospitalization time between the two groups(P ﹥ 0. 05). In the observation group, the function of elbow joint was excellent in 10 cases,good in 4 cases,fair in 1 case,poor in 1 case

  3. Clinical Analysis of the Treatment of Proximal Humeral Locking Plate of Proximal Humerus Fractures in Elderly%肱骨近端锁定钢板治疗老年肱骨近端骨折的临床分析

    Institute of Scientific and Technical Information of China (English)

    施云东

    2015-01-01

    Objective To evaluate and observe functional outcome of locking proximal humeralplate(LPHP)used for fixationof the proximal humerus fractures in elderly.Methods In 108 cases of proximal humerus in elderly hospital in April 2011 to April 2014 received fractures were targeted,according to neer classification of fractures were classified in some patients,including 48 cases of fracture type Ⅱ,Ⅲ fracture 50 cases,ⅳ fractures in 10 cases. Al patients underwent treatment of proximal humeral locking plate by neer scores were assessed for treatment effect.Results After treatment,al patients 4 to 10 months of folow-up,results showed that al patients have received bone fractures healed and no deformity occurs in good overal healing rate of 98.1 percent, fracture healing time of 9 to 11 weeks,in al cases no complications of infection,nerve injury.Conclusion Locking proximal humeral plateosteosynthes is leads to satisfactory functional outcomes in proximal humerus fractures,which is aless complications,early functional exercise,effective therapeutic method.%目的:对肱骨近端锁定钢板治疗老年肱骨近端骨折的临床分析效果进行分析。方法以我院2011年4月~2014年4月接收的108例老年肱骨近端骨折患者为对象,根据Neer分型对患者骨折部分进行分型,其中Ⅱ型骨折48例,Ⅲ型骨折50例,Ⅳ型骨折10例。所有患者均行肱骨近端锁定钢板治疗,通过Neer评分对患者治疗效果进行评定。结果治疗后对所有患者进行4~10个月的随访,结果显示所有患者骨折情况均得到愈合,且无畸形发生,在总体愈合优良率方面达98.1%;骨折愈合时间9~11周;所有病例均未产生感染、神经损伤等并发症。结论肱骨近端锁定钢板治疗老年肱骨近端骨折不仅愈合率高,且康复时间短,较少发生术后并发症,对复位丢失情况能够有效防止,使板下血运和骨折愈合得到保护。

  4. 肱骨近端复杂骨折老年患者手术治疗临床分析%Curative Effect of Locking Proximal Humeral Plate and Proximal Humerus Locking Fixation System for the Treatment of Proximal Humeral Fractures in the Elderly Patients

    Institute of Scientific and Technical Information of China (English)

    阮艺; 程廷雄; 聂运修; 翁永前

    2014-01-01

    目的 研究肱骨近端锁定内固定系统(proximal humerus internal locking system,PHILOS)、肱骨近端锁定钢板(locking proximal humerus plate,LPHP)对于肱骨近端复杂骨折老年患者的治疗效果.方法 将作者医院2010-07/2012-07月收治的92例老年肱骨近端复杂骨折的患者作为研究对象,随机分为PHILOS组、LPHP组,每组各46例,比较两组的治疗效果.结果 与LPHP组相比PHILOS组手术时间较短、术中出血量相对少,骨折愈合时间短,两组相比差异具有统计学意义(P<0.01);两组患者术后,疼痛症状改善,日常生活逐渐恢复,关节活动能力提高;PHILOS组上述指标的改善程度优于LPHP组(P<0.01);PHILOS组治愈率为97.83%高于LPHP组的80.43%(x2=7.1805,P<0.01);两组并发症的发生情况比较差异具无统计学意义(x2= 1.0110,P=0.3417).结论 PHILOS与LPHP相比骨折愈合时间短、患者术后疼痛减轻、运动功能恢复快,且治愈率高;对于治疗老年肱骨近端复杂骨折具有一定的临床意义.

  5. 背侧双锁定加压钢板治疗桡骨远端伸直型不稳定骨折%Dorsal double locking compression plate for treatment of stretched unstable distal radial fractures

    Institute of Scientific and Technical Information of China (English)

    伏治国; 张曦; 董启榕; 盛永华; 高俊

    2013-01-01

    Objective To evaluate the outcome of dorsal double locking compression plate (LCP) in treatment of stretched unstable distal radial fractures.Methods Fourteen cases of stretched unstable distal radial fractures were treated by reduction and internal fixation using straight or L-shaped anatomic LCP via dorsal approach.Wrist functional exercise was conducted immediately after operation.Follow up was made after operation to assess motion pain,functional score of wrist,and complication incidence at postoperative 12 weeks,24 weeks,and 1 year.Results Follow-up was lasted for 5-24 months.At postoperative 12 weeks,24 weeks and 1 year,mean visual analogue scale (VAS) was (1.88 ±0.26) points,(0.87 ± 0.14) points and (0.37 ± 0.06) points respectively and wrist functional score (Gartland-Werley score) was (6.45 ± 1.72) points,(2.73 ± 0.52) points and (2.10 ± 0.31) points respectively.According to Garfland-Werley score in the latest follow-up,the results were excellent in 10 cases,good in two,and fair in two.Besides,one case was combined with myotenositis of extensor pollicis longus muscle tendon and another case with myotenositis of extensor tendon.Conclusion Dorsal double LCP is one of the effective methods for stretched unstable distal radial fractures that can reconstruct anatomical structure of the wrist efficiently and attain satisfactory functional recovery,with no obvious pain.%目的 评价背侧双锁定加压钢板(locking compression plate,LCP)对桡骨远端伸直型不稳定骨折的治疗效果. 方法 14例桡骨远端伸直型不稳定骨折,采用背侧入路,骨折复位后用解剖型直形和“L”形LCP固定.术后早期开始腕关节动能锻炼.随访评价术后12,24周、1年的活动痛和腕关节功能评分及并发症的发生率. 结果 随访5~24个月,术后12,24周,1年活动时的视觉模拟评分(visual analogue scale,VAS)分别为(1.88±0.26)分、(0.87±0.14)分、(0.37±0.06)分;腕关节功

  6. Finite element analysis of bridge combined fixation system and the locking plate-screw system on the application for femoral fractures%桥接组合式内固定系统与锁定接骨板钉系统在股骨骨折应用中的有限元分析

    Institute of Scientific and Technical Information of China (English)

    熊鹰; 李群辉; 柳百炼; 赵烽; 王大兴; 张仲子

    2012-01-01

    背景:桥接组合式内固定系统在人体骨折固定上,与锁定钢板相比效果如何,有待实验证实.目的:比较桥接组合式内固定系统与金属锁定接骨板钉系统固定股骨干骨折的生物力学特性.方法:对两种固定方式的有限元模型进行模拟加载,了解各模型中骨与内固定的应力分布和应变特点,并对结果加以分析.结果与结论:爬楼梯时接骨板锁定螺钉上的应力比步态时增48.6%,达到480 MPa,最大应力出现在中间锁定螺钉上.桥接系统中间联接棒上的最大应力比步态时大34.1%,最大值为373.9 MPa,出现在联接棒中间略远端附近;骨折区域上的应力桥接组合式内固定系统小于金属锁定接骨板钉系统.提示桥接组合式内固定系统较金属锁定接骨板钉系统具有更好的生物力学性能,固定更牢靠、利于骨折生长,是骨折内固定的一种更好选择.%BACKGROUND: The effect of the bridge combined fixation system for the fixation of bone fracture compared with locking plate system needs to be confirmed by experiment. OBJECTIVE: To compare the biomechanical properties of bridge combined fixation system and locking plate-screw system for the fixation of femoral fractures. METHODS: We used the finite element analysis method to analyze biomechanical characters of the femoral fractures fixed with the locking plate-screw system and bridge combined fixation system, such as the stress distribution and the strain characteristics of bone and fixation. RESULTS AND CONCLUSION: The stress on the locking plate screw when climbing stairs was increased for 48.6% compared with walking, the stress was 480 MPa and the maximum stress was on the middle of the locking plate-screw screws. The maximum stress on the middle of the bridge system when climbing was 34.1% larger than that when walking, the maximum stress was 373.9 MPa and occurred near the distal connection rod. The stress on the fracture area of bridge combined

  7. Experimental biomechanical analysis of standing position in both-column acetabular fractures fixed by anterior reconstruction plate combinated with trans-plate quadrilateral screws%前路钛板加方形区螺钉治疗髋臼双柱骨折的站立位力学分析

    Institute of Scientific and Technical Information of China (English)

    蔡贤华; 吴咏德; 刘曦明; 张红喜

    2013-01-01

    [目的]探讨前路特殊塑形钛板加方形区螺钉治疗髋臼双柱骨折早期站立的可能性.[方法]选取成年防腐保湿处理的全骨盆标本6具,保留韧带及髋关节囊,制作单侧髋臼高位双柱骨折模型,随机先后采用前路特殊塑形钛板加方形区螺钉(B组)及常规塑形钛板加1/3管型钛板(C组)内固定,固定标本于ZWICKZ100电子万能材料试验机上,模拟站立位以400~700 N垂直加载,分别测定完整骨盆(A组)、B组及C组后柱内壁横向位移、髋臼顶纵向位移,并计算刚度.[结果]随着载荷增加,各位移值呈逐渐增加的线性关系,且A组<B组<C组;在生理负荷600N载荷下,横向与纵向位移值均为C组>B组>A组、刚度为C组>B组>A组,C组与B组、A组与C组间差异明显(P<0.05),B组与A组差异无显著意义(P>0.05).[结论]站立位下,前路特殊塑形钛板加方形区螺钉较常规塑形钛板加1/3管型钛板内固定即刻力学性能更为可靠,稳定性与完整骨盆接近,这表明早期站立并不影响前路特殊塑形钛板加方形区螺钉内固定的稳定性.%[ Objective] To explore the standing possibility in the early after both - column acetabular fracture fixed by anterior specially - shaped reconstruction plate combinated with trans - plate quadrilateral screws on cadaver. [ Method] Six Chinese adult wetly pelvic specimens with their ligament and joint capsule of hip joint preserved with antisepsis were made into the model with high both-column acetabular fracture on one side. The fractures were fixed randomly by anterior specially-shaped titanium plate with quadrilateral screws( group B) or conventionally-shaped reconstruction titanium plate with 1/3 tubular titanium plate (group C). To imitate the static standing position of the patient,the specimen fixed on ZWICK-Z100 electronic universal material testing machine received the vertical loading from 400 N to 700 N to measure the transverse displacement of

  8. Using paleomagnetism to expand the observation time window of plate locking along subduction zones: evidence from the Chilean fore-arc sliver (38°S - 42°S)

    Science.gov (United States)

    Hernandez-Moreno, Catalina; Speranza, Fabio; Di Chiara, Anita

    2017-04-01

    fore-arc sliver undergoing CW rotations is a function of plate coupling along the subduction zone interface. Zones of high coupling enhance stress normal to the LOFZ, induce high LOFZ strength, and yield a wide deformation zone characterized by CW rotations. Conversely, low coupling imply a weak LOFZ, a lack of CW rotations, and a fore arc entirely dominated by CCW rotations related to sinistral fault kinematics. Our locking inferences are in good agreement with those recently derived by GPS analysis and indicate that seismotectonic segment coupling has remained virtually unchanged during the last 5Ma.

  9. Lost Treasures: Locks

    Directory of Open Access Journals (Sweden)

    Semra SARAÇOĞLU ÇELİK

    2015-03-01

    Full Text Available Locks have been widely used in our daily life. In this paper an attempt is made to study the history of locks and to give the kinds of locks and samples from past to present: Ancient Egypt, Chinese, Iran, Roman, Turk-Islam Locks. Ancient locks relied on the pin tumbler principle that many of today's locks use. Many early Roman Keys were made to be worn as rings, because clothing of Romans did not have pockets. It is hoped that this article can simulate more research and publications regarding the development of ancient locks.

  10. Locking of metacarpophalangeal joints in a patient with acromegaly

    Energy Technology Data Exchange (ETDEWEB)

    Tani, Y.; Tanaka, N.; Isoya, Eiji [Dept. of Orthopaedic Surgery, Soseikai General Hospital, Kyoto (Japan)

    1999-11-01

    A 39-year-old man with acromegaly exhibited locking of metacarpophalangeal (MCP) joints of both index fingers. Large osteophytes were found at the metacarpal heads by radiography and computerized tomography (CT). Magnetic resonance (MR) images revealed hypertrophy of volar plates. We suggest that these characteristic acromegalic features caused locking of MCP joints. Surgery was required on one of the joints to release the locking. (orig.)

  11. Column flotation

    Energy Technology Data Exchange (ETDEWEB)

    Kohmuench, J.N.; Norrgran, D.A.; Luttrell, E.; Luttrell, G.H. [Virginia Tech. (United States)

    2008-04-15

    Over the last decade, column flotation has been recognised in the industry to be most efficient and economical means of recovering fine coal while maximizing product grade. When designed properly, flotation columns provide a high combustible recovery while maintaining a low product ash. The paper looks at the benefits of using column flotation for fine coal recovery. 2 refs., 5 figs.

  12. The proximal humerus pressure locking plate clinical efficacy for treatment of proximal humeral fractures with traditional steel%肱骨近端加压锁定钢板与传统钢板治疗肱骨近端骨折的临床疗效比较

    Institute of Scientific and Technical Information of China (English)

    唐拥军

    2013-01-01

      目的对肱骨近端加压锁定钢板和传统钢板应用于肱骨近端骨折的效果加以对比分析。方法随机选择我院2009年5月~2011年5月肱骨近端骨折患者56名,分成A、B组,A组治疗组33名患者,B组对照组23名患者,分别给予加压锁定钢板和传统钢板方法加以医治。结果经医治,A组患者Neer功能分数高于B组,有效率高于B组,并发症概率低于B组患者。结论肱骨近端加压锁定钢板应用于肱骨近端骨折,效果较好。%Objective Pressurized locking plates and traditional steel to contrast analysis applied to the effect of proximal humerus fractures of the proximal humerus. Methods Random selection in our hospital from May 2009 to May 2011 proximal humeral fractures in 56 patients, divided into A, group B, group A treatment group of 33 patients, 23 patients of the B group, the control group were given pressurized locking plate andconventional plate method to be healed. Results A group of patients after healing the Neer function scores higher than group B, there are more efficient than group B, the complication probability lower than that in group B patients. Conclusion Pressurize the proximal humeral locking plate is applied to the proximal humerus fractures, better.

  13. Three dimensional finite element of new assembly locking compression plate%新型组合式锁定加压钢板生物力学性能的三维有限元分析

    Institute of Scientific and Technical Information of China (English)

    周江军; 余专一; 程球新; 肖春林; 赵敏; 罗飞; 吕仁发; 杨俊; 付美清; 史柏娜; 雷雪

    2016-01-01

    目的:通过有限元分析的方法观察新型组合式锁定加压钢板(NALCP)与传统锁定加压钢板(LCP)固定股骨粉碎性骨折的应力分布情况。方法采用64排螺旋CT对一名健康成年男性股骨进行层厚为0.625 mm扫描,获得股骨CT数据,通过Mimics、Geomagic等逆向工程软件获得股骨有限元模型,模拟股骨中段粉碎性骨折,分别采用NALCP和LCP两种钢板模拟手术固定,加以缓慢行走单腿股骨载荷及扭转载荷,分析两种不同固定方式钢板及股骨的应力分布情况。结果两种载荷情况下, NALCP与LCP骨折断端区域钢板应力分布变化趋势基本一致,应力分布均匀。缓慢行走载荷NALCP主钢板最大应力值为5.292×102 Mpa,滑槽钢板部件最大应力值为9.388×102 Mpa,骨折块最大位移为1.428 mm,LCP钢板最大应力值为6.485×102 Mpa,骨折块最大位移2.633 mm;扭转载荷NALCP主钢板最大应力值为6.172×102 Mpa,滑槽钢板部件最大应力值为1.059×103 Mpa,骨折块最大位移为1.495 mm,LCP钢板最大应力值为1.059×103 Mpa,骨折块最大位移为2.103 mm。结论 NALCP既能够为骨干粉碎性骨折提供坚强的力学稳定性,又能为骨折断端保证足够的力学刺激,促进骨愈合。%Objective To investigate the stress distribution of new assembly locking compression plate(NALCP)and conventional locking compression plate(LCP)in the fixation for femoral comminuted fracture by finite element analysis(FEA). Methods The femur of a healthy male adult received 64⁃slice spiral CT scanning with 0.625 mm slice thickness,and the femur CT data was obtained. The femur finite element models were established by reverse engineering softwares,such as Mimics and Geomagic,to simulate the middle femoral comminuted fracture. The models received simulated fixation by using NALCP and LCP,respectively. Loads were applied on the two models to simulate a person slowly walking by

  14. Mass Transfer and Axial Mixing Characteristics in a Coalescence-Dispersion Pulsed-Sieve-Plate Extraction Column%聚并-分散脉冲筛板萃取塔的传质与轴向混合特性

    Institute of Scientific and Technical Information of China (English)

    唐晓津; 骆广生; 汪家鼎

    2004-01-01

    A new configuration of coalescence-dispersed pulsed-sieve-plate extraction column (CDPSEC) was developed, and the mass transfer and axial mixing characteristics were evaluated with the two-point dynamic method.The influence of operation conditions was discussed with experimental results, showing that the mass transfer performance of CDPSEC mainly depends on the energy input and the holdup of dispersed phase. Higher energy input results in higher holdup of the dispersed phase, the axial mixing of the continuous phase is suppressed, and the true height of mass transfer unit decreases markedly. On the other hand, higher energy input leads to more serious forward mixing of the dispersed phase, so the energy input should be limited. Accordingly the operation conditions were divided into two regions, and empirical correlations for predicting the mass transfer and axial mixing characteristics in different regions with a satisfactory accuracy were suggested.

  15. Plate osteosynthesis of simple forearm fractures : LCP versus DC plates

    NARCIS (Netherlands)

    Stevens, Charles Tjerk; Ten Duis, Henk Jan

    2008-01-01

    The aim of this study was to compare the time to radiological bony union of simple A-type fractures of the forearm, treated with either a locking compression plate (LCP) or a dynamic compression plate (DCP). For each fracture, the relation between the use of compression and radiological healing time

  16. Plate osteosynthesis of simple forearm fractures : LCP versus DC plates

    NARCIS (Netherlands)

    Stevens, Charles Tjerk; Ten Duis, Henk Jan

    The aim of this study was to compare the time to radiological bony union of simple A-type fractures of the forearm, treated with either a locking compression plate (LCP) or a dynamic compression plate (DCP). For each fracture, the relation between the use of compression and radiological healing time

  17. Quantum dot immunoassays in renewable surface column and 96-well plate formats for the fluorescence detection of Botulinum neurotoxin using high-affinity antibodies

    Energy Technology Data Exchange (ETDEWEB)

    Warner, Marvin G.; Grate, Jay W.; Tyler, Abby J.; Ozanich, Richard M.; Miller, Keith D.; Lou, Jianlong; Marks, James D.; Bruckner-Lea, Cindy J.

    2009-09-01

    A fluorescence sandwich immunoassay using high affinity antibodies and quantum dot (QD) reporters has been developed for detection of botulinum toxin serotype A (BoNT/A). For the development of the assay, a nontoxic recombinant fragment of the holotoxin (BoNT/A-HC-fragment) has been used as a structurally valid simulant for the full toxin molecule. The antibodies used, AR4 and RAZ1, bind to nonoverlapping epitopes present on both the full toxin and on the recombinant fragment. In one format, the immunoassay is carried out in a 96-well plate with detection in a standard plate reader. Detection down to 31 pM of the BoNT/Hc-fragment was demonstrated with a total incubation time of 3 hours, using AR4 as the capture antibody and QD-coupled RAZ1 as the reporter. In a second format, the AR4 capture antibody was coupled to Sepharose beads, and the immunochemical reactions were carried out in microcentrifuge tubes with an incubation time of 1 hour. These beads were subsequently captured and concentrated in a rotating rod “renewable surface” flow cell as part of a sequential injection fluidic system. This flow cell was equipped with a fiber optic system for fluorescence measurements. In PBS buffer solution matrix, the BoNT/A-HC-fragment was detected to concentrations as low as 5 pM using the fluidic measurement approach.

  18. Prospects of implant with locking plate in fixation of subtrochanteric fracture: experimental demonstration of its potential benefits on synthetic femur model with supportive hierarchical nonlinear hyperelastic finite element analysis

    Directory of Open Access Journals (Sweden)

    Latifi Mohammed

    2012-04-01

    Full Text Available Abstract Background Effective fixation of fracture requires careful selection of a suitable implant to provide stability and durability. Implant with a feature of locking plate (LP has been used widely for treating distal fractures in femur because of its favourable clinical outcome, but its potential in fixing proximal fractures in the subtrochancteric region has yet to be explored. Therefore, this comparative study was undertaken to demonstrate the merits of the LP implant in treating the subtrochancteric fracture by comparing its performance limits against those obtained with the more traditional implants; angle blade plate (ABP and dynamic condylar screw plate (DCSP. Materials and Methods Nine standard composite femurs were acquired, divided into three groups and fixed with LP (n = 3, ABP (n = 3 and DCSP (n = 3. The fracture was modeled by a 20 mm gap created at the subtrochanteric region to experimentally study the biomechanical response of each implant under both static and dynamic axial loading paradigms. To confirm the experimental findings and to understand the critical interactions at the boundaries, the synthetic femur/implant systems were numerically analyzed by constructing hierarchical finite element models with nonlinear hyperelastic properties. The predictions from the analyses were then compared against the experimental measurements to demonstrate the validity of each numeric model, and to characterize the internal load distribution in the femur and load bearing properties of each implant. Results The average measurements indicated that the constructs with ABP, DCPS and LP respectively had overall stiffness values of 70.9, 110.2 and 131.4 N/mm, and exhibited reversible deformations of 12.4, 4.9 and 4.1 mm when the applied dynamic load was 400 N and plastic deformations of 11.3, 2.4 and 1.4 mm when the load was 1000 N. The corresponding peak cyclic loads to failure were 1100, 1167 and 1600 N. The errors

  19. 普通接骨板与锁定接骨板治疗成人闭合性跟骨关节内骨折疗效对比%Clinical analysis of open reduction and internal fixation with unlocking plate or locking plate for treatment of adult in-tra-articular calcaneal fractures

    Institute of Scientific and Technical Information of China (English)

    曲绍东; 杨占辉; 史宏伟; 石明国; 张立军; 贾文杰; 苏庆军

    2015-01-01

    Objective To analyze the effect of open reduction and internal fixation (ORIF) with unlocking plate or locking plate for treatment of adult intra-articular calcaneal fracture. Methods 68 cases of calcaneal fracture,including 72 feet in 56 males (4 males were bilateral) and 12 females,with the average age of 35 years (ranging from 18 to 71), were en-rolled. According to Sanders' classification,15 feet were classified as type Ⅱ,46 feet were classified as type Ⅲ, and 11 feet were classified as type Ⅳ. 44 feet were treated with unlocking plate for calcaneal fracture in group A , 28 feet were treated with locking plate for calcaneal fracture in group B. The cases of existing ipsilateral lower limb fracture, ipsilateral vascular injury, and ipsilateral lower limb open injury were excluded. Results The wounds of 64 feet healed piemarily,5 feet were delayed healing. The soft tissue coloboma of 3 feet delayed until pedicle flap transfered. The B(o)hler angle of two groups were significantly different between preoperation and postoperation, but there were no significant differences in B(o)hler angle between two groups. 64 feet in 63 cases were followed up for 12~26 months. According to the AOFAS Ankle-Hindfoot Scale ,49 feet scored 90~100 points,13 feet scored 75~89 points and 2 feet scored 50~74 points. The excellent and good rate was 96.9%. Conclusion ORIF with unlocking plate or locking plate are all effective methods to treat the calcaneal fracture , there are no significant dif-ferences in curative effect between the two methods.%目的 分析普通接骨板与锁定接骨板治疗成人闭合性跟骨骨折的临床疗效. 方法 本组跟骨骨折68例(72足),男56例,女12例,4例男性为双侧. 年龄18~71岁,平均35岁. 应用Sanders分型,其中Ⅱ型15足,Ⅲ型46足,Ⅳ型11足.其中应用非锁定跟骨接骨板治疗44足(A组),应用锁定跟骨接骨板治疗28足(B组).排除术前合并同侧下肢骨折、同侧血管损伤及同

  20. 冷弯薄壁型钢钢板-螺栓梁柱节点的力学性能分析%Mechanical properties investigation of cold-formed steel beam-column joints with bolt-plate

    Institute of Scientific and Technical Information of China (English)

    杨娜; 钟延营

    2011-01-01

    The ANSYS software is used to investigate the influential factors of the static behavior of gusset plate-bolted connection. The influential factors of the connections of three kinds of width of beam-column web were studied, including bolt pitch, the thickness of gusset plate, and the thickness of web and the width of flange and so on. It is found that the width of beam-column web the thickness of gusset plate, the thickness of web are highly effective factors for the static behavior,while the bolt pitch and the width of flange do not affect the initial stiffness and the ultimate bearing capacity of the joints. Finally, design proposals of three sections form connections are demonstrated, the dynamic performance of three kinds of recommended connections have been preliminarily studied in this paper.%为了观察不同梁、柱截面尺寸冷弯薄壁型钢钢板-螺栓节点静力性能的影响因素,采用AN-SYS软件对连接进行非线性有限元分析,研究3种梁柱腹板的节点螺栓间距、连接板厚度、腹板厚度和翼缘宽度等因素对其连接性能的影响.结果表明,梁柱腹板宽度、连接板厚度、梁柱腹板厚度是影响该连接节点静力性能的有效因素,而改变螺栓间距、梁柱翼缘宽度对节点的初始刚度和极限承载力的影响都不明显.给出了3种截面形式节点的设计建议,并对节点滞回性能进行了初步探讨,提出了滞回性能指标分析结论.

  1. Treatment of intertrochanteric and subtrochanteric femur fractures with indirect reduction and submuscular reversed polyaxial locking plate fixation%间接复位、经皮股骨髁万向锁定板倒置治疗股骨转子间及转子下骨折

    Institute of Scientific and Technical Information of China (English)

    张智长; 王韬; 陆男吉; 罗从风; 曾炳芳

    2011-01-01

    目的 探讨间接复位、经皮股骨髁万向锁定板倒置治疗股骨转子间及转子下骨折治疗效果.方法 对28例股骨转子间及转子下骨折患者,均采用牵引床间接复位、穿皮股骨髁万向锁定板倒置固定.结果 28例均获得随访,时间5~11个月.骨折愈合时间为3~6个月.无肢体短缩、髋内翻等并发症.结论 对外侧壁粉碎或反斜行骨折、髓腔过细不适合髓内固定、假体周围骨折等股骨转子间及转子下骨折,采用间接复位、股骨髁万向锁定板倒置固定效果良好.%Objective To evaluate the clinical effects of treating intertrochanteric and subtrochanteric femur fractures with indirect reduction and submuscular reversed polyaxial locking plate fixation.Methods 28 patients of intertrochanteric and subtrochanteric femur fractures were treated by indirect reduction and submuscular reversed polyaxial locking plate fixation.Results All 28 patients were followed up for 5 ~ 11 months.Fractures healed at 3 ~ 6 months.No complications as limb shortening, or varus deformity was found.Conclusions For patients with fractures with trochanteric extension,reverse obliquity fractures , subtrochanteric fractures associated with indwelling intramedullary hardware, patients with intramedullary canals too small for intramedullary nailing, indirect reduction and submuscular reversed polyaxial locking plate is effective.

  2. Clinical Analysis on Locking Plate Combining Bone Grafting in Treating with Fracture of Surgical Neck of Humerus%锁定钢板联合植骨治疗老年性肱骨外科颈骨折临床分析

    Institute of Scientific and Technical Information of China (English)

    张坤和; 黄黎; 王理德

    2014-01-01

    Objective To explore clinical efficacy of locking plate combining bone grafting in treating the senile with fracture of surgical neck of humerus and to provide references for future clinical treatment. Methods 180 patients with fracture of surgical neck of humerus admitted by this Hospital were selected as research subjects, who were divided into the research group and the control group on different treatment methods with 90 cases in each group. The patients in the research group underwent locking plate combining bone grafting treatment, and patients in the control group underwent locking plate treatment. Results The comparison and difference between intra-operative duration and postoperative healing time of patients in two groups were statistically significant (P <0.05).Conclusions The locking plate combining bone grafting in treating the senile with fracture of surgical neck of humerus delivers remarkable clinical efficacy, and patients are greatly recovered.%目的:探究钢板联合植骨治疗老年肱骨外科颈骨折的临床效果,为后期临床治疗提供参考。方法选取我院收入的肱骨骨折患者180例为研究对象,根据治疗方式的不同分为研究组与对照组各90例。研究组行锁定钢板联合植骨治疗,对照组行锁定钢板治疗。结果两组患者在手术及术后愈合时间比较,差异具有统计学意义(P<0.05)。结论锁定钢板联合植骨治疗老年性肱骨外科颈骨折的临床效果显著,患者恢复好。

  3. Using closed reduction and minimally invastive locking plate fixation to treat distal radius fractures%闭合复位微创锁定钢板内固定治疗桡骨远端骨折

    Institute of Scientific and Technical Information of China (English)

    明立功; 明朝戈; 王自方; 王新德; 孟维娜; 王慧

    2016-01-01

    目的:探讨采用闭合复位微创接骨板固定术(minimally invasive plate osteosynthesis, MIPO )置入锁定加压接骨板(locking compression plate, LCP)内固定治疗桡骨远端骨折的手术技巧及疗效。方法自2010年以来,在桡骨远端解剖学基础上,采用远端腕关节横弧形切口、近端纵行小切口MIPO技术置入LCP内固定治疗桡骨远端骨折12例。结果12例患者术后获12~25个月(平均15个月)随访。骨折愈合时间6~12周,平均8周。采用AO组织建议的Garland and Werley评分方法,对本组的疗效进行评估。优10例,良1例,可1例,优良率91.7%。12例平均手术时间为(55±15) min,术中平均失血量为(35±10) mL,术后平均住院时间为(7±2) d。无一例发生医源性正中神经损伤,所有患者伤口均Ⅰ期愈合。结论采用小切口MIPO技术置入LCP内固定治疗桡骨远端骨折,具有骨折愈合快、并发症少、功能恢复快的优点,临床效果良好。%Objective To describe the surgical skill and the effect of using closed reduction MIPO technology into LCP internal fixation for the treatment of distal radius fractures. Methods Since from 2010, based on the anatomy of distal radius, 12 cases with distal radius fractures were treated by using MIPO technology into LCP internal fixation, by which applying horizontal arc incision of distal wrist joint and longitudinal small incision of proximal of wrist joint. Results 12 cases were followed-up from 12 to 24 months (average 15 months), bone union time from 6 to 12 weeks (average 8 weeks). The scoring methods used Garland and Werley, the results showed excellent in 10 cases, good in 1 case, fair in 1 case, with an excellent and good rate of 91.7%. The mean operative time was (55 ±15) min in 12 cases, mean intraoperative blood lose was (35 ±10) mL, the average hospitallization time was (7 ±2) d. None of the iatrogenic injury of the median nerve, all

  4. Fixation of displaced proximal humeral fractures with proximal humeral internal locking plate in the elderly%肱骨近端锁定型钉板治疗老年人移位的肱骨近端骨折

    Institute of Scientific and Technical Information of China (English)

    纪泉; 文良元; 薛庆云; 赵立连; 黄公怡

    2011-01-01

    Objective To investigate the treatment effect of the proximal humeral internal locking system (PHIL()S) on the elderly patients with displaced proximal humeral fractures.Methods From Feb 2004 to Mar 2007, 36 patients (mean age: 72.2 years) with proximal humeral fractures were treated with PHILOS plate fixation which included 14 cases with 2-part, 17 cases with three-part and 5 cases with four-part fractures according to Neer classification. Operation time,intraoperative blood loss, blood transfusion, perioperative complications and function evaluation of the operated shoulder joint were calculated with 14.5 months follow-up at average.Results The average operation time and blood loss were (61.5± 11.6) min and ( 165.2±91.2) ml, respectively. 1 case with accidents of blood vessel and 1 case with pneumonia were found without neurovascular injuries. All fractures were radiographically healed in an average of 3-5 months. No necrosis of humeral head appeared and 30 (83.3%) cases were excellent or good according to Neer scoring system. Two part fracture and early operation ( within 3 days after operation) might improve the postoperative function of shoulder joint, but the patient's age, gender and ASA score were not statistically with Neer score.Conclusions PHILOS plate fixation is a suitable procedure for displaced proximal humeral fractures via stable fixation and early rehabilitation, especially for elderly patients combined with osteoporosis.%目的 探讨肱骨近端锁定型钉(PHILOS)板治疗老年人移位的肱骨近端骨折的疗效。方法 回顾性分析2004年2月至2007年3月用PHILOS板治疗的36例肱骨近端骨折患者,Neer分型二部分骨折14例,三部分骨折17例,四部分骨折5例。统计手术时间、输血量和手术并发症,评价肩关节功能。 结果 患者平均年龄72.2岁,平均随访14.5个月。术中平均输血165.2 ml,术后X线显示骨折复位满意,无神经、血管损

  5. Locking proximal humerus plate/proximal humeral internal locking system versus other internal fixations for the treatment of proximal humeral fractures in adults: a Meta analysis%肱骨近端锁定钢板或肱骨近端内锁定系统与其他内固定治疗肱骨近端骨折的Meta分析

    Institute of Scientific and Technical Information of China (English)

    胡稷杰; 金丹; 魏宽海; 任高宏; 余斌; 王钢

    2012-01-01

    目的 对采用肱骨近端锁定钢板(LPHP)或肱骨近端内锁定系统(PHILOS)与其他内固定治疗肱骨近端骨折(PHFs)的疗效进行Meta分析,为临床治疗提供参考依据. 方法 通过计算机检索MEDLINE(1966年至2011年12月)、EMbase(1966年至2011年12月)、Cochrane图书馆(2011年第4期)和中国生物医学文献数据库(2001至2011年)等,搜集有关LPHP/PHILOS和其他内固定治疗PHFs的各种对照研究,对纳入的文献选择Neer评分、Constant-Murley功能评分、肩关节疼痛和功能障碍指数(SPADI)量表和美国肩肘外科医师(ASES)评分、异位骨化发生率、感染率、肱骨头缺血坏死率、骨折延迟愈合率、螺钉松动率、钢板断裂率、肩峰下撞击征发生率、肱骨头半脱位发生率、肩关节活动受限发生率、肩关节疼痛发生率、二次手术率作为Meta分析的评价指标,采用RevMan 5.0进行分析. 结果 共纳入18项研究1133例患者.LPHP/PHILOS与其他内固定治疗PHFs相比,螺钉松动率更低,差异均有统计学意义[OR=0.23,95% CI(O.07,0.74),P=O.01].LPHP/PHILOS与其他内固定治疗PHFs的Neer评分优良率、异位骨化发生率、感染率、肱骨头缺血坏死率、骨折延迟愈合率、钢板断裂率、肩峰撞击征发生率、肱骨头半脱位发生率、肩关节活动受限发生率比较,差异均无统计学意义(P>0.05). 结论 LPHP/PHILOS与其他内固定在特定条件下各有利弊,不能盲目扩大LPHP/PHILOS的临床适应证,治疗方案要结合患者的病情甚至经济情况综合考虑.%Objective To evaluate and compare locking proximal humerus plate/proximal humeral internal locking system (LPHP/PHILOS) versus other internal fixations in the treatment of proximal humeral fractures (PHFs) in adults.Methods According to Cochrane Reviews,Cochrane library (Issue 4,2011),Ovid MEDLINE (from January 1966 to December 2011),EMbase (from January 1966 to December 2011),Chinese National Knowledge

  6. 髋臼横断骨折后柱长/短钢板内固定的有限元建模及分析%FEM Modeling and Analysis of Transverse Fractured Acetabulum with Fixations of Posterior Column Long Plate and Short Plate

    Institute of Scientific and Technical Information of China (English)

    吴淑琴; 潘宏侠; 裴葆青

    2011-01-01

    目的 建立有效的髋臼横断骨折有限元模型,完成两种内固定方式的比较.方法 利用Mimics 10.0中建立髋臼骨骨折的三维模型,在逆向工程Geomagic中进行相应处理后,在ANSYS Workbench中生成短/长钢板固定模型,并进行加载分析.结果 相同加载方式下,短钢板模型的最大位移、模型整体及髋臼窝处的最大应力和最大应变,均大于长钢板模型.另外,短钢板模型更容易错位失效.结论 本文有限元模型能有效地反映骨盆应力分布,分析结果表明后壁钢板固定时,将钢板长度延伸至坐骨结节处能提供更大的稳定性.%Objective To establish a valid finite element model of the transverse fractured acetabulum and finish the analysis of inner fixation ways. Methods The three-dimensional image of the pelvis was reconstructed with the software Mimics 10. 0 and was modified with the software Geomagic. Then the 3D model of fractured pelvis was imported into ansys workbench and was established after some operations. After that the integrated 3D finite element models of transverse fractured acetabulums were established, which were fixed with posterior column long and short plates respectively. Finally the vertical load pressure was exerted on the upper terminal plate of the pelvis with some constrainer, and the distribution of stress was analyzed. Results With same loads , the maximum total deformation , von-mises stress and von-mises strain of short plate were bigger than them of long plate. In addition, the model with short plate was easier to lapse. Conclusion It was indicated that the proposed model was stable and valid to contribute the stress of pelvis. For the fixation of transverse fractured acetabulum with a posterior plate, extending the plate to hucklebone tuber was considered more stable.

  7. Overview of locking systems

    Energy Technology Data Exchange (ETDEWEB)

    Gee, K.T.; Scott, S.H.; Wilde, M.G. [Sandia National Labs., Albuquerque, NM (United States); Highland, S.E. [Albuquerque Safe Co., Albuquerque, NM (United States)

    1993-12-01

    The purpose of this document is to present technical information that should be useful for understanding and applying locking systems for physical protection and control. There are major sections on hardware for locks, vaults, safes, and security containers. Other topics include management of lock systems and safety considerations. This document also contains notes on standards and specifications and a glossary.

  8. outcome of plate osteosynthesis in the management of proximal ...

    African Journals Online (AJOL)

    Rush pins with blade plates, locking plates and IM nails. (8-10). IM fixation ... Three patients who had pathological fractures from tumour and infection were excluded from the study. Results: ... being implant failure, nonunion, osteonecrosis of.

  9. Reading Columns

    OpenAIRE

    Coutts, Marion

    2008-01-01

    Reading Columns are twin permanent public sculptures commissioned as part of a £245m scheme for the redevelopment of the Chatham Place area in Reading. Dimensions: 3.5m high x 1.3m diameter each Field of knowledge: The work consists of twin bespoke columns of stainless steel and glass over digital colour transparencies. The piece revisits and reworks the idea of the Morris Column, a 19th C feature characteristic of major European metropolitan centres. A wraparound image on each of ...

  10. 锁定钛板及半肩关节置换治疗肱骨近端骨折的疗效分析%Locking plates and semi-shoulder arthroplasty for complex proximal humeral fractures

    Institute of Scientific and Technical Information of China (English)

    吕扬; 李少柟; 周方; 田耘; 姬洪全; 张志山

    2011-01-01

    目的 探讨锁定钛板及半肩关节置换术治疗肱骨近端骨折的疗效与适应证。方法 2005年1月至2008年12月共收治51例肱骨近端骨折患者,其中39例获得随方,男12例,女27例;平均年龄65.1岁(17 ~ 80岁)。骨折按Neer分型:二部分骨折23例,三部分骨折10例,四部分骨折6例。受伤至手术时间平均为5.5d(1~9d)。手术方式选择:二部分骨折及年龄<60岁的患者使用锁定钛板内固定治疗,四部分骨折及年龄> 60岁的患者使用半肩关节置换术。本组使用肱骨近端内固定系统(PHILOS)钛板切开复位内固定32例(PHILOS钛板组),其中二部分骨折23例,三部分骨折9例;采用肱骨头置换术治疗7例(关节置换组),其中三部分骨折1例,四部分骨折6例。结果 PHILOS钛板组患者手术时间平均为84 min(60 ~ 140 min),失血量平均为155 mL( 100 ~400 mL);关节置换组患者手术时间平均为125 min( 100 ~ 170 min),失血量平均为220 mL(150~450) mL。39例患者术后获平均23个月(16~46个月)随访,无一例出现并发症。PHILOS钛板组28例术后3个月复查X线片示骨折愈合,另4例术后6个月骨折愈合,肩臂手功能丧失量表(DASH)评分平均为20.7分,患者对手术主观满意率为87.5%。关节置换组7例患者DASH评分平均为36.0分,患者对手术主观满意率为71.4%。结论 对于年龄<60岁的患者及大部分Neer 二、三部分骨折的老年患者,可以选择PHILOS钛板内固定治疗,而年龄>60岁的四部分骨折患者选择半肩关节置换术可以获得较满意的疗效。%ObjectiveTo explore the clinical effects and indications of locking plates and semi-shoulder arthroplasty for complex proximal humeral fractures. Methods Thirty-nine cases of proximal humeral fractures were treated from January 2005 to December 2008. They were 12 men and 27 women, with a mean age of 65.1 years. According to

  11. The proximal humeral internal locking system (PHILOS) plate for the proximal humerus fractures in the elderly patients%肱骨近端锁定内固定系统治疗老年肱骨近端骨折

    Institute of Scientific and Technical Information of China (English)

    吕巍; 储波

    2013-01-01

    Objective To evaluate the treatment outcome of the proximal humeral internal locking system (PHILOS) plate for the proxi-mal humerus fractures in the 30 elders .Methods January 2010 to January 2012 ,there were elderly proximal humeral fractures in 30 cases ,an average of 70 .5 years (65 to 82 years) ,6 males and 24 females .According to the Neer classification fractures two -part fracture in five ca-ses ,three-part fracture in 20 cases ,four -part fractures in five cases .Surgery are used PHILOS internal fixation ,pectoralis major deltoid space approach ,and reserves the soft tissue on the fracture fragments and nodules ,and five cases of four parts fractures are the filling of the artificial bone particles .All patients were followed up for up for 3 to 18 months ,with an average of 14 .6 months .Results All patients with fractures were healing ,no incision infection .Good rate of Neer shoulder score :excellent in 15 cases ,good in 7 cases ,satisfaction of six ca-ses ,excellent rate of 73 .3% (22/30) .Conclusion PHILOS can play firmly fixed proximal humeral fractures ,the treatment of the elderly proximal humerus fractures ,osteoporosis ,comminuted to obtain satisfactory clinical efficacy .%目的:评价肱骨近端锁定内固定系统(PHILOS)治疗老年肱骨近端骨折的方法及临床疗效。方法2010年1月~2012年1月收治老年肱骨近端骨折30例,平均70.5岁(65~82岁),男性6例,女性24例。根据N eer分型二部分骨折5例,三部分骨折20例,四部分骨折5例。手术均采用 PHILOS内固定治疗,三角肌胸大肌间隙入路,保留附着于骨折碎片及大小结节上的软组织,5例四部分均予人工颗粒骨充填。所有病人均获得随访,随访时间3~18个月,平均14.6个月。结果所有患者骨折均获得愈合,无切口感染。按 N eer肩关节功能评分的优良率:优15例,良7例,满意6例,优良率73.3%(22/30)。结论 PHILOS可起到牢固固

  12. Using river locks to teach hydrodynamic concepts

    Science.gov (United States)

    Carvalho-Santos, Vagson L.; Mendes, Thales C.; Silva, Enisvaldo C.; Rios, Márcio L.; Silva, Anderson A. P.

    2013-11-01

    In this work, the use of a river lock as a non-formal setting for teaching hydrodynamical concepts is proposed. In particular, we describe the operation of a river lock situated at the Sobradinho dam, on the São Francisco River (Brazil). A model to represent and to analyse the dynamics of river lock operation is presented and we derive the dynamical equations for the rising of the water column as an example to understand the Euler equation. Furthermore, with this activity, we enable the integration of content initially introduced in the classroom with practical applications, thereby allowing the association of physical themes to content relevant in disciplines such as history and geography. In addition, experiences of this kind enable teachers to talk about the environmental and social impacts caused by the construction of a dam and, consequently, a crossover of concepts has been made possible, leading to more meaningful learning for the students.

  13. Using river locks to teach hydrodynamic concepts

    CERN Document Server

    Carvalho-Santos, Vagson L; Silva, Enisvaldo C; Rios, Márcio L; Silva, Anderson A P

    2013-01-01

    In this work, the use of a river lock as a non-formal setting for teaching Q2 hydrodynamical concepts is proposed. In particular, we describe the operation of a river lock situated at the Sobradinho dam, on the S\\~ao Francisco River (Brazil). A model to represent and to analyse the dynamics of river lock operation is presented and we derive the dynamical equations for the rising of the water column as an example to understand the Euler equation. Furthermore, with this activity, we enable the integration of content initially introduced in the classroom with practical applications, thereby allowing the association of physical themes to content relevant in disciplines such as history and geography. In addition, experiences of this kind enable teachers to talk about the environmental and social impacts caused by the construction of a dam and, consequently, a crossover of concepts has been made possible, leading to more meaningful learning for the students.

  14. Synchronized oscillation in a modular neural network composed of columns

    Institute of Scientific and Technical Information of China (English)

    LI; Su; QI; Xianglin; HU; Hong; WANG; Yunjiu

    2005-01-01

    The columnar organization is a ubiquitous feature in the cerebral cortex. In this study, a neural network model simulating the cortical columns has been constructed. When fed with random pulse input with constant rate, a column generates synchronized oscillations, with a frequency varying from 3 to 43 Hz depending on parameter values. The behavior of the model under periodic stimulation was studied and the input-output relationship was non-linear. When identical columns were sparsely interconnected, the column oscillator could be locked in synchrony. In a network composed of heterogeneous columns, the columns were organized by intrinsic properties and formed partially synchronized assemblies.

  15. 锁定钢板治疗肱骨近端NeerⅢ、Ⅳ型骨折疗效分析%Analysis on the efficacy of the treatment with Locking Proximal Humeral Plate for Neer III and Ⅳ Proximal Humeral Fracture

    Institute of Scientific and Technical Information of China (English)

    林长生; 李光荣

    2013-01-01

    目的观察肱骨近端锁定钢板治疗肱骨近端NeerⅢ、Ⅳ型骨折的临床疗效.方法2004年1月~2011年2月应用肱骨近端普通解剖型钢板和肱骨近端锁定钢板治疗肱骨近端NeerⅢ、Ⅳ型骨折114例.观察组62例用肱骨近端锁定钢板内固定(NeerⅢ型50例,NeerⅣ型12例).对照组52例用肱骨近端普通解剖型钢板内固定(NeerⅢ型42例,NeerⅣ型10例).结果114例获随访12~36个月,平均16.6个月.按照Neer功能评定标准进行评分,观察组:优20例;良38例;可4例;差0例.对照组:优10例;良28例;可10例;差4例.采用SPSS11.0软件进行分析.观察组与对照组有显著差异(P<0.05).结论肱骨近端锁定钢板治疗肱骨近端NeerⅢ、Ⅳ型骨折,操作简单,内固定坚强,效果满意.%Objective To investigate the clinical outcome of the treatment with locking proximal humerus plate for Neer III and Ⅳ proximal humeral fracture. Methods 114 cases of Neer III and Ⅳ proximal humeral fracture from January 2004 to February 2011 were treated with the locking proximal humerus plate and the proximal humerus anatomic plate. Test group including 50 cases of Neer Ⅲ and 12 cases of Neer Ⅳ were treated with the internal locking proximal humerus plate fixation. The other 52 cases including 42 cases of Neer Ⅲ and 10 cases of Neer Ⅳ as a control group were treated with the internal proximal humerus anatomic plate fixation. Results All the 114 cases were followed up for 12 to 36 mouths (averaging 16.6 mouths). According to Neer scoring system, in the test group, the therapeutic outcome was excellent in 20, good in 38 and so so in 4 cases; in the control group: the therapeutic outcome was excellent in 10, good in 28, so so in 10 and poor in 4 cases. Analysis by SPSS11.0 software, the outcome between test group and control group was significant different (P<0.05). Conclusion The treatment of locking proximal humeral plate for Neer Ⅲ and Ⅳ proximal humeral fracture

  16. 切开复位锁定钢板内固定治疗肱骨近端骨折111例%Proximal Humerus Fracture treated with Open Reduction and Internal Fixation with Locking Plate

    Institute of Scientific and Technical Information of China (English)

    刘立源; 陈灼; 刘锦召; 马震; 张保红

    2012-01-01

    Objective:To explore the clinical efficacy of open reduction and locking proximal humerus plate (LPHP) in treating proximal humerus fracture. Methods:From January 2008 to June 2010, 111 patients with proximal humerus fracture of Neer type II , IE and IV , who were treated with open reduction and LPHP, were followed up for the record of OSS, VAS scales as well as the complications. Results:A total of 92 cases finished a half-year to one-year follow-up, with an average of 68 years (20 to 97 years), 18 males and 74 females. The mean Oxford Shoulder Score (OSS) was 16. 37 and Visual Analogue Scale (VAS) was 3. 1. The complication rate was 41. 3% :1. 1% hemorrhage rate, 3. 3% poor connection of humerus head and greater tubercle, 6. 5% chronic pain, 0% avascular necrosis of humerus head, 4. 3% loss of reduction and cutting-out of the screw, 3. 3% plate fracture, 11. 9% collision injury of subacromion, 4. 3% periarthritis of shoulder, 1. 1% rotator cuff tears, and 1. 1% infection. Twenty-four patients underwent secondary surgery due to the above complications. Conclusion:LPHP is an effective therapy for proximal humerus fracture. Although it has high complications and rate of reoperation, the incidences are lower than those reported in current literature.%目的:探讨切开复位、锁定钢板内固定治疗肱骨近端移位骨折的临床疗效,评价并发症发病率和患肩功能的恢复程度,并对PHILOS或LPHP板进行比较.方法:选取2008年1月-2010年6月间因肱骨近端骨折而手术治疗的根据Neer分型划分为2、3或4级的111例患者,通过电话及门诊复查随访1年并进行牛津肩关节评分(OSS)、疼痛程度VAS评分评估及记录相关的并发症及相关处理.结果:92例患者完成术后0.5~1年的随访(83%,92/111),平均年龄为68岁(20~97岁),其中男女比例1∶5(18∶74),平均的牛津大学肩评分为16.37分(范围:11~54分),0~10的VAS评分测定的疼痛程度平均得分为3.1

  17. Column: lef

    NARCIS (Netherlands)

    Reep, Frans van der

    2012-01-01

    1e alinea column: Ook in je beleggingsbeslissingen is het voor echte performance wellicht tijd om eens voorbij best practices (dan word je namelijk hoogstens tweede) te kijken naar next practices. Als je op zeker speelt, verdien je weinig geld. Want anderen gingen je al voor. Maar kun je nog meer op

  18. Comparison between locking proximal humerus plate and intramedullary nail in the treatment of humerus surgical neck fracture%肱骨近端锁定钢板与髓内钉治疗肱骨外科颈骨折比较

    Institute of Scientific and Technical Information of China (English)

    田飞鹏; 李春双; 邵建萍

    2016-01-01

    目的:比较肱骨近端锁定钢板与髓内钉治疗肱骨外科颈骨折的临床疗效。方法60例肱骨外科颈骨折患者,随机分为观察组与对照组,各30例。对照组采用肱骨近端锁定钢板固定法治疗,观察组采用髓内钉固定法治疗。对比两组疗效。结果观察组手术时间(77.3±11.8)min 及骨折愈合时间(9.3±1.9)周短于对照组(P0.05)。结论肱骨外科颈骨折采用肱骨近端锁定钢板与髓内钉固定均有较好的治疗效果,相对而言,髓内钉治疗肱骨外科颈骨折创伤更小、出血量更少,有利于术后骨折的尽快愈合,治疗效果更为明显。%Objective To compare clinical effects between locking proximal humerus plate and intramedullary nail in the treatment of humerus surgical neck fracture. Methods A total of 60 patients with humerus surgical neck fracture were randomly divided into observation group and control group, with 30 cases in each group. The control group received locking proximal humerus plate for treatment, and the observation group received intramedullary nail. Curative effects were compared between the two groups. Results The observation group had shorter operation time as (77.3±11.8) min and fracture healing time as (9.3±1.9) weeks than those in the control group (P0.05). Conclusion Both locking proximal humerus plate and intramedullary nail show good effect in the treatment of humerus surgical neck fracture. Comparison shows intramedullary nail with smaller trauma, less bleeding volume, quicker fracture healing after operation, and more remarkable effect.

  19. External fixation followed by locking plate internal fixation to treat tibia and fibula open fractures\\%外固定架一期固定后二期锁定钢板内固定治疗胫腓骨开放性骨折

    Institute of Scientific and Technical Information of China (English)

    李生平; 黄辉; 彭维波

    2012-01-01

    目的 评价应用外固定架固定后二期锁定钢板内固定治疗胫腓骨开放性骨折的疗效.方法 对118例胫腓骨开放骨折患者行外固定架固定后二期锁定钢板内固定治疗.结果 118例均获随访,时间12~24个月.除1例因钢板移位影响骨折愈合外,其余患者骨折均愈合,时间3.1~5.2个月,骨折愈合率为99.2%;并发症发生率4.2%.按照Enneking评分系统评估疗效:优96例,良11例,可7例,优良率为90.7%.膝关节活动度:伸0°,屈135°,踝关节活动度:背伸30°,跖屈40°.结论 外固定架固定后二期锁定钢板内固定治疗胫腓骨开放骨折操作简便,固定牢靠,骨折愈合快,并发症少,临床疗效满意.%Objective To study the curative effect of treatment of tibia and fibula open fractures with external fixation bllowed by locking plate internal fixation in Phase II. Methods 118 patients with tibia and fibula open fractures vere treated with external fixation followed by locking plate internal fixation. The healing of fracture was observed. Results All 118 cases were followed up for 12 ~24 months. The time of fracture healing was 3. 1 ~5. 2 months. The ;omplication rate was 4. 2% , fracture healing rate was 99. 2% . According to Enneking function assessment system, he curative effect was excellent in 96 patients, good in 11, fair in 7 and poor in 4, and the excellent and good rate was )0. 7% . The joint range of knee motion was 0 degrees for extension and 135 degrees for flexion. Moreover, joint range )f extend motion was 30 degrees for extension and 40 degrees for flexion. Conclusions It is an effective way to treat ibia and fibula open fractures with external fixation combined with locking plate internal fixation in Phase II , which las advantages of simple operation, reliable fixation,low infection rate, fast fracture healing,and less complications.

  20. A short term analysis on of therapeutic effects of locking proximal humerus plate for the treatment of comminuted fractures of proximal humerus%肱骨近端锁定钢板治疗肱骨近端粉碎性骨折的短期随访研究

    Institute of Scientific and Technical Information of China (English)

    李昌坤; 张斌; 杨先武

    2012-01-01

    目的 探讨肱骨近端锁定钢板治疗肱骨近端粉碎性骨折的短期疗效,为临床应用提供依据.方法 总结2008年8月~2009年12月20例使用LPHP治疗的肱骨近端粉碎性骨折患者资料,使用Consta-nt-Murley(C-M)肩关节评分标准进行疗效评定.结果 术后所有患者切口Ⅰ期愈合,所有患者定期随访,分别在术后3、6和12个月,随访时间12 ~26个月,平均13.15个月.18例于术后5~8个月获得骨性愈合.术后3、6与12个月C-M肩关节评分比较,差异无统计学意义,其中优7例,良6例,一般5例,差2例.结论 LPHP治疗肱骨近端粉碎性骨折,短期疗效显著.%Objective To investigate the short-term curative effects of locking proximal humerus plate for the treatment of comminuted fractures of proximal humerus, and provide evidences for the clinical practice. Methods From August 2008 and December 2009,20 patients with comm inuted fractures of proximal humerus were treated with locking plates, Outcomes were assessed with radio graphy and the Constant-Murley(C-M) shoulder evalution. Results All the patients got primary healing of incisions. Twenty patients were followed up,and the duration ranged from 12 to 26 months,with an average of 13. 15 months. Eighteen patients had fracture healing during 5 to 8months after operation. There was no significant differences among 3,6 and 12 months after operation in C-M scoring. There were 7 cases got an excellent result, 6 good, 5 fair, and 2 poor. Conclusion The short-term curative effect of the locking proximal humerus plate in the treatment of proximal humeral fractures is significant.

  1. 肱骨近端锁定接骨板(L.P.H.P)治疗肱骨近端骨折临床体会%Proximal humerus locking 3 plate (L.P.H.P) treatment of proximal humerus fractures clinical experience

    Institute of Scientific and Technical Information of China (English)

    鲁追; 孙永新

    2013-01-01

    objective To study the use of locking 3 plate treatment effect for the treatment of proximal humeral fractures. Methods in our hospital from January 2009 to December 2011 were 15 cases with AO lock 3 plate treatment of proximal humeral fractures in patients with clinical data were retrospectively analyzed,and based on the analysis of follow-up data treatment effect. Results 15 patients postoperative fracture healing,healing time 7 ~ 11 weeks,no incision infection,malunion,internal fixation loosening fracture and the head of the humerus ischemic necrosis. Optimal in 5 cases,8 cases,can be in 2 cases, was 86.67%.Conclusion The use of locking 3 plate for proximal humerus fractures is a safe and effective treatment method, especially for the comminuted fracture and fractures of 3,4 are applicable.%  目的探讨使用锁定接骨板治疗肱骨近端骨折的治疗效果.方法对该院2009年1月—2011年12月收治的15例采用AO锁定接骨板治疗的肱骨近端骨折患者的临床资料进行回顾性分析,并根据随访资料分析治疗效果.结果15例患者术后骨折全部愈合,愈合时间7~11周,无切口感染情况、畸形愈合情况、内固定松动断裂情况和肱骨头缺血坏死情况.优5例,良8例,可2例,优良率86.67%.结论使用锁定接骨板治疗肱骨近端骨折是一种安全、有效的治疗方法,特别是对于粉碎性骨折和3、4部分的骨折较为适用.

  2. AO锁定加压接骨板在股骨下份长节段粉碎性骨折中的应用%Application of locking compression plate of AO type for treatment of Long-segmented and comminuted subtrochanteric fracture

    Institute of Scientific and Technical Information of China (English)

    汪金荣; 卢海霖; 杨新文; 刘宾; 赵念东

    2012-01-01

    Objective To probe into the use of locking compression plate( LCP )of AO type to treat long-segmented and comminuted subtrochanteric fracture. Methods 38 patients with long-segmented and comminuted subtrochanteric fractures were fixed internally with locking compression plate of AO type in first stage from Nov 2003 to Oct2009 .Results All patients have been followed up within 9~24 months after operation, all of fractures have healed up in this time, the average healing time is 5.13 months, the embedded appliances have not loosened or ruptured. The rate to meliorate knee joint function : 13 patients were best, 15 patients were better, 8 patients were not bad, 2 patients were bad. The excellence rate was 73.68%. Conclusions LCP of AO type is simple to operate, reliable to fix, less wounded, low complications, wide applic-ability.etc.therefore it is fit for popularizing in wide-range hospitals.%目的 探讨AO新型锁定加压接骨板又称锁定内固定支架(Locking compression plate,LCP)在股骨下份长节段粉碎性骨折中的应用.方法 2003年11月~2009年10月,收治股骨下份长节段粉碎性骨折38例,采用AO新型锁定加压接骨板(LCP)进行内固定一期植骨治疗.结果 所有病例随访9~24个月,骨折均在随访期内愈合,平均愈合时间为5.13个月,无植入物松动、断裂.改良膝关节功能评分:优13例,良15例,可8例,差2例,优良率73.68%.结论AO锁定加压接骨板(LCP)治疗股骨下份长节段粉碎性骨折具有操作简单、固定可靠、愈合率高,并发症少,适应症广等优点,适合推广.

  3. Locking Plate Combined with Traditional Chinese Medicine Seven Scattered Modiifed Treatment of Senile Comminuted Subtrochanteric Fractures of the Femur in 26 Cases%锁定钢板配合中药七厘散加味治疗老年股骨粗隆下粉碎性骨折26例

    Institute of Scientific and Technical Information of China (English)

    王力群

    2014-01-01

    Objective:To observe the anatomical locking plate combined with oral seven scattered by traditional Chinese medicine in the treatment of intertrochanteric fractures in the elderly comminuted fractures of the clinical efficacy. Methods:The intertrochanteric femoral anatomic locking plate combined with oral traditional Chinese medicine in the treatment of elderly patients with scattered seven subtrochanteric comminuted fractures in 26 cases, clinical observation. Results:In these patients, 11 cases were excellent, 42.31%, good in 13 cases, accounting for 50%, 2 cases, accounting for 7.69%, the excellent and good rate was 92.31%. Conclusion:Anatomical locking plate system used for the treatment of senile comminuted subtrochanteric fractures of the femur of good curative effect, can reduce the fracture hematoma and interference on fracture healing. With the oral administration of seven scattered with Chinese medicine is conducive to fracture healing.%目的:观察解剖型锁定钢板配合内服七厘散加味中药治疗老年股骨粗隆下粉碎性骨折的临床疗效。方法:回顾性分析我院2009年7月~2012年5月期间收治的老年股骨粗隆下粉碎性骨折患者26例的临床资料,对全部患者采用股骨粗隆解剖型锁定钢板配合内服七厘散加味中药进行治疗,观察临床疗效。结果:本组患者优11例,占42.31%,良13例,占50%,可2例,占7.69%,优良率92.31%。结论:解剖锁定钢板系统用于治疗老年股骨粗隆下粉碎性骨折疗效好,能减少骨折部位的血肿及对骨折愈合的干扰。配合内服七厘散加味中药有利于骨折愈合。

  4. Experimental investigation of seismic behavior of beam-to-column T-stub connected joints with inserted plates%设置垫板的梁柱T形件连接节点抗震性能试验研究

    Institute of Scientific and Technical Information of China (English)

    吴兆旗; 苏建强; 姜绍飞; 费晓晖

    2012-01-01

    针对传统钢结构梁柱连接在地震中易脆性破坏,改进连接震后不易修复等问题,提出设置垫板的梁柱T形件连接构造措施。设计、制作3个不同形式的梁柱T形件连接试件,分别为未设置混凝土板的连接节点、设置混凝土板的连接节点和未设置混凝土板的传统梁柱T形件连接节点,对其进行往复荷载作用下的拟静力试验,研究试件的抗弯刚度、承载力、延性、滞回性能、耗能能力、破坏模式等。此外,更换梁下部翼缘处已破坏的T形件进行修复,并对修复后的试件进行拟静力试验。结果表明:设置垫板的T形件连接节点在往复荷载作用下具有稳定的滞回性能和良好的耗能能力;破坏试件的梁、柱均不发生屈服,转动中心位于梁端上部翼缘附近,能够保证在地震作用下梁端上部翼缘连接部位不发生破坏,并能够保护梁上混凝土楼板不发生较大的损坏;混凝土楼板的存在会提高节点正弯矩下的初始刚度和承载力,并使弯曲中性轴上移;更换梁下部翼缘处已破坏的T形件进行修复,修复后试件的滞回性能与原试件无明显差异。%This paper proposes an innovative beam-to-column T-stub connection with inserted plates to overcome the problems that the traditional connections are prone to brittle failure and the improved ones are not convenient to repair after damage.Three different specimens were designed,fabricated and tested by quasi-static experiments,which included a steel joint without a concrete floor slab,a steel joint with a concrete floor slab and a traditional T-stub connected joint without a concrete floor slab.The seismic behaviors,such as the stiffness,the bearing capacity,the ductility,the hysteretic behavior,the energy dissipation capacity and failure mode,etc.,were studied.Moreover,after repaired by replacing the destroyed bottom T-stub,the joint was tested once again.The results indicate that T-stub connected

  5. Holberg, lecteur de Locke

    DEFF Research Database (Denmark)

    Schøsler, Jørn

    2009-01-01

      En undersøgelse af John Lockes modtagelse i dansk Oplysningsfilosofi med særligt henblik på Holberg......  En undersøgelse af John Lockes modtagelse i dansk Oplysningsfilosofi med særligt henblik på Holberg...

  6. 解剖重建锁定钢板固定治疗肱骨近端三、四部分骨折脱位%Management of proximal humeral Neer 3-part and 4-part fracture dislocations with anatomic reconstruction locking plate

    Institute of Scientific and Technical Information of China (English)

    杨国勇; 向明; 胡晓川; 陈杭; 杨顺; 唐浩琛

    2012-01-01

    Objective To analyze the therapeutic effect of open reduction with internal fixation (ORIF) and anatomic reconstruction locking plate in treatment of Neer 3-part and 4-part fracture dislocations of proximal humerus. Methods The study involved 30 patients with Neer 3-part and 4-part fracture dislocations treated with anatomic reconstruction locking plate from September 2004 to December 2007.Twenty patients had complete follow-up data.The treatment methods included locking proximal humeral plate (LPHP) in seven patients and proximal humeral internal locking system (PHILOS) in 13.There were 15 males and five females,at age range of 29-84 years (average 52.5 years),including nine patients younger than 65 years and 11 older than 65 years.According to Neer classification,there were 15 patients with 3-part fracture dislocations including 12 anterior and three posterior dislocations and five patients with 4-part fracture dislocations including four anterior and one posterior dislocations. VAS and Constant scoring system were adopted to evaluate the shoulder joint function postoperatively. Results All 20 patients were followed up for 36-71 months ( average 51 months),which showed avascular necrosis of humeral head in six patients (30%),plating loosening in two,screw penetration in six,nonunion in two and infection in two.The mean visual analogue score (VAS) was 2.55 poiuts and the mean Constant score for the shoulder was 80.8.According to the Neer shoulder functional evaluation standard,eight patients were graded as excellent,six as good,three as fair and three as poor,with excellence rate of 70%.Conclusions Although the anatomic reconstruction locking plate and ORIF can cause a high incidence of avascular necrosis of humeral head in the treatment of Neer 3-part and 4-part fracture dislocations of proximal humerus,especially for the patients older than 65 years.However,there is no obvious correlation between necrosis of humeral head and shoulder function

  7. Comparison of the Efficacy of Sustaining Plate vs.Locking Plate for the Treatment of Tibial Plateau Fracture%支持钢板、锁定钢板治疗胫骨平台骨折的疗效比较

    Institute of Scientific and Technical Information of China (English)

    谭海涛; 张朝跃; 曾跃林; 陈铖

    2014-01-01

    【目的】对比分析锁定钢板(LP)和支持钢板(SP)内固定治疗胫骨平台骨折的疗效。【方法】收集胫骨平台骨折患者44例,其中 SP内固定19例(SP组),LP内固定25例(LP组),对比分析两组患者的手术时间、术中出血量、术后伤口引流量、住院时间、骨折愈合时间及膝关节功能评定结果。【结果】两组患者住院时间、术后引流量比较无统计学差异(P>0.05);与 LP组比较,SP组术中出血量较多,手术时间、骨折愈合时间较长;LP组优良率92.00%,显著高于 SP组(78.94%),其差异有统计学意义(P<0.05)。【结论】LP治疗胫骨平台骨折疗效优于 SP,主要表现在术中出血量、手术时间、骨折愈合时间和膝关节功能评分等指标。%[Objective]To compared and analyze the efficacy of sustaining plate(SP)vs.locking plate(LP) for the treatment of tibial plateau fracture.[Methods]A total of 44 patients tibial plateau fracture were col-lected.Among them,19 patients underwent SP internal fixation(SP group),while 25 patients underwent LP internal infixation(LP group).The age,gender,inj ury status,type,operation time,blood loss,postoperative wound drainage volume,length of hospital stay,healing time of fracture and the rating results of knee joint function in 2 groups were compared and analyzed.[Results]There was no significant difference in gender con-stitution,average age,the combined inj ury,fracture type,hospitalization time and postoperative drainage vol-ume between two groups(P>0.05).Compared with LP group,intraoperative blood loss was more,and op-eration time and healing time were longer in SP group.The good and excellent rate in LP group was markedly higher than that in SP group(92.00% vs.78.94%),and there was significant difference(P<0.05).[Con-clusion]LP for the treatment of tibial plateau fracture is better than SP.The main indexes are intraoperative blood loss

  8. Locke on measurement.

    Science.gov (United States)

    Anstey, Peter R

    2016-12-01

    Like many virtuosi in his day, the English philosopher John Locke maintained an active interest in metrology. Yet for Locke, this was no mere hobby: questions concerning measurement were also implicated in his ongoing philosophical project to develop an account of human understanding. This paper follows Locke's treatment of four problems of measurement from the early Drafts A and B of the Essay concerning Human Understanding to the publication of this famous book and its aftermath. It traces Locke's attempt to develop a natural or universal standard for the measure of length, his attempts to grapple with the measurement of duration, as well as the problems of determining comparative measures for secondary qualities, and the problem of discriminating small differences in the conventional measures of his day. It is argued that the salient context for Locke's treatment of these problems is the new experimental philosophy and its method of experimental natural history.

  9. 锁定加压钢板桥接技术治疗粉碎性胫骨干骨折%Treatment of comminuted tibial shaft fractures using locking compression plating and bridging

    Institute of Scientific and Technical Information of China (English)

    周振宇; 刘璠; 刘雅克; 陶然; 王友华; 曹毅; 王洪

    2011-01-01

    目的 探讨锁定加压钢板(LCP)桥接技术治疗粉碎性胫骨干骨折的疗效。方法 2005年1月至2010年3月采用LCP治疗78例粉碎性胫骨干骨折患者,男46例,女32例;年龄23~ 69岁,平均36.4岁;左侧41例,右侧37例。骨折根据AO分型:均为42C型,其中C1型38例,C2型26例,C3型14例。闭合性骨折63例,开放性骨折15例。闭合性骨折待水肿消退后选用4.5或5.0mm LCP经皮桥接技术置入。开放性骨折经严格清创后同法置入LCP。术后鼓励患者进行屈髋、屈膝及下肢肌力训练。结果 78例患者术后获平均19个月(6~35个月)随访。所有患者无感染发生。骨折愈合时间平均为22周(13 ~42周)。77例患者获骨性愈合,1例因骨不连发生钢板断裂。末次随访时患者膝关节活动度为100°~130°,平均123°。膝关节功能按美国特种外科医院膝关节评分系统评分为89 ~96分,平均92.1分。踝关节功能按美国足踝外科学会制定的功能评分为82 ~97分,平均93.6分。结论 对于粉碎性胫骨干骨折,LCP桥接技术能提供可靠有效的内固定,并允许患者早期进行功能锻炼,是治疗粉碎性胫骨f骨折的有效方法之一。%Objective To evaluate clinical outcomes of locking compression plating (LCP) and bridging techniques for comminuted tibial shaft fractures.Methods From January 2005 to March 2010,78 patients with comminuted tibial shaft fractures were treated with LCP and bridging. They were 46 men and 32 women, with an average age of 36.4 years (from 23 to 69 years). There were 41 left and 37 right fractures. All the cases were of type 42C fracture according to AO classification, including 38 cases of C1, 26 cases of C2 and 14 cases of C3. Sixty-three cases were close and 15 cases were open fractures. For close fractures, a 4.5/5.0 mm LCP was inserted percutaneously with bridging technique after soft tissue swelling subsided, and the same surgical

  10. 2.4 mm anatomical locking compression plate for treatment of type C distal radius fractures in elderly patients%新型锁定加压钢板治疗老年桡骨远端C型骨折

    Institute of Scientific and Technical Information of China (English)

    张立海; 唐佩福; 许猛; 张里程; 陈华; 柴伟; 张强; 张国莹; 吴兵; 梁永辉

    2010-01-01

    目的 探讨新型2.4 mm锁定加压钢板(LCP)治疗老年桡骨远端C型骨折的初期疗效.方法 回顾性分析2006年10月至2008年11月采用新型2.4 mm LCP治疗21例老年桡骨远端C型骨折患者,男7例,女14例;年龄71~85岁,平均76岁.骨折按AO分型:C1型6例,C2型13例,C3型2例,均为闭合性骨折.所有患者均经掌侧入路复位固定,术中不显露背侧组织,骨缺损严重行置入人工骨.结果 所有患者获平均10.6个月(8~27个月)随访.X线片示骨折全部一期愈合,平均愈合时间为8周.2例骨缺损严重者,术中植入人工骨.所有患者均无感染、骨不连、钢板松动、腕管综合征等并发症发生.术后功能康复时间4~36周,平均11周.腕关节活动度:背伸23°~84°,平均71.3°;掌屈33°~86°,平均72.0°;尺偏19°~29°,平均26.3°;桡偏12°~30°,平均19.9°;前臂旋前60°~87°,平均79.5°;旋后52°~80°,平均76.4°.与健侧对比,握力减弱3例,活动后疼痛3例.按改良的Mcbride腕关节功能评价标准:优14例,良5例,可2例,优良率为90.5%.结论 新型2.4 mm LCP治疗老年骨质疏松引起的桡骨远端C型骨折,内固定坚强,可以早期功能锻炼,疗效佳.%Objective To evaluate clinical outcomes of the elderly patients with type C distal radius fractures caused by osteoporosis who were treated by open reduction and internal fixation with 2.4 mm anatomical locking compression plate (LCP). Methods From October 2006 to November 2008, 21 elderly patients with comminuted unstable distal radius fractures caused by osteoporosis were treated by open reduction and internal fixation with 2. 4 mm LCP. They were 7 males and 14 females, with an average age of 76 years (range, 71 to 85 years). According to AO classification, there were 6 cases of type CI, 13 cases of type C2 and 2 cases of type C3. All of them were closed fractures of distal radius. All the fractures were fixed with 2.4 mm LCP by volar approach and dorsal soft

  11. 肱骨近端锁定钢板治疗复杂肱骨近端骨折临床疗效分析%nalysis of clinical effectiveness of locking proximal humerus plate for treatment of complicated proximal humeral fractures

    Institute of Scientific and Technical Information of China (English)

    高志涛; 杨志

    2014-01-01

    Objective To investigate the AO proximal humeral locking plate (LPHP) treatment of complex fractures of the proximal humerus methods and results. Methods A retrospective analysis of March 2009-January 2013 with AO proximal humeral locking plate treatment of complex proximal humeral fractures 38 cases. Aged 41 to 73 years, mean 62.1 years. Fractures by Neer classification method, III part fractures 24 cases, IV-part fractures in 14 cases. AO herein are proximal humeral locking plate fixation, using the deltoid, pectoralis major gap approach. Results All cases were stage I surgi-cal incision healing, which have received 5 to 24 months of long-term follow-up, the fractures were healed. According to Neer score, ex-cellent in 26 cases, good in 8 cases, 3 cases and poor in 1 case, the to-tal fine rate was 89.5%. Conclusion AO locking compression plate proximal humeral fractures with a fixed and reliable blood supply of the humeral head on impact, fewer complications, etc., especially for unstable osteoporosis complex proximal humeral fractures, surgery after the energy early exercise, long-term follow-up study, results were satisfactory, is the treatment of proximal humeral fractures more satisfactory fixation methods.%目的:探讨应用 AO 肱骨近端锁定接骨板( LPHP)治疗复杂肱骨近端骨折的方法及疗效。[方法]回顾性分析2009年3月-2013年1月应用AO肱骨近端锁定接骨板治疗复杂肱骨近端骨折38例。年龄41-73岁,平均62.1岁。骨折按Neer分型法, III部分骨折24例, IV部分骨折14例。均予AO肱骨近端锁定接骨板内固定,采用三角肌、胸大肌间隙入路。结果所有病例手术切口均I期愈合,均获得5-24个月的长期随访,骨折均愈合。根据Neer评分,优26例,良8例,可3例,差1例,总优良率达89.5%。结论AO锁定加压接骨板治疗肱骨近端骨折具有固定可靠,对肱骨头血供影响小,并发症少等优点,特别适用于不稳

  12. 肱骨近端锁定钢板治疗肱骨近端粉碎性骨折的疗效分析%Analysis on the Efficacy of the Treatment with Locking Proximal Humeral Plate for Proximal Humeral Comminuted Fracture

    Institute of Scientific and Technical Information of China (English)

    张泽远; 罗赛平; 彭耀金; 王淼

    2013-01-01

    目的:观察肱骨近端锁定钢板治疗肱骨近端粉碎性骨折的临床疗效.方法:肱骨近端骨折82例,随机分为两组.治疗组(n=41)用肱骨近端锁定钢板内固定,对照组(n=41)用三叶草钢板内固定.随访6-36个月,平均(18.6-± 2.3)月,观察治疗后骨折愈合情况、肩关节功能恢复情况,记录骨折愈合时间、患肩活动度.采用Neer评分法评定疗效.观察手术并发症及安全性.结果:治疗组满意率87.81%,对照组满意率70.73%.两组满意率相比较,差异有统计学意义(X2=3.976,P<0.05).治疗组治疗后外展和外旋活动度与对照组同期相应指标比较;差异有统计学意义(P<0.05).两组并发症的发生率相比较,差异有显著意义(X2=4.895,P<0.05).结论:肱骨近端锁定钢板治疗肱骨近端粉碎性骨折疗效肯定,安全性好.%Objective:To investigate the clinical curative effect of locking proximal humeral plates on proximal humeral comminuted fracture.Methods:82 cases with proximal humeral comminuted fractures were randomly divided into two groups.The treatment group (n =41) was treated with locking proximal humeral locking plate,while the control group (n =41) was treated with clover leaf plate.Both were followed up for 6 to 36 months,average (18.6± 2.3) months,observing fracture healing after treatment and shoulder function recovery,recording the healing time,shoulder mobility.The efficacy were evaluated by Neer standard,and the complications and security were observed as well.Results:After the treatment,satisfaction rate of the treatment group was 87.81% and that of the control group was 70.73%.Comparing the satisfaction rates of two groups,the difference was statistically significant (X2 =3.976,P < 0.05).Comparing outreach and spin activity of two groups after treatment,difference was statistically significant (P < 0.05).Comparing the incidence of complications of two groups,the difference was also significant (X2 =4.895,P < 0

  13. Locking proximal humerus plate combined with allogeneic boneal for the treatment of fracture of surgical neck of humerus%肱骨近端锁定钢板结合同种异体骨移植治疗老年肱骨外科颈骨折的疗效

    Institute of Scientific and Technical Information of China (English)

    王众; 李强; 范顺武

    2012-01-01

    Objective To study therapeutic effect of locking proximal humerus plate combined with allogeneic boneal for the treatment of fracture of surgical neck of humerus. Methods From 2009 January to 2011 June, 98 cases of fracture of surgical neck of humerus were randomly divided into observation and control groups, observation group was given locking proximal humerus plate combined with allogeneic boneal for the treatment, control group was given the proximal humeral locking plate, Neer function evaluation was used to analyze clinical therapeutic effect. Results The follow-up time was 6 ~ 17 ( 10. 2 ±5. 2) month. The satisfactory rate of observation group was 97. 9% (47/49), it was 75.5% (37/49) in control group, the two groups had significant difference,X2 = 15.235, P = 0.001. Conclusions The clinical effect of locking compression plate combined with allograft bone implantation treating fracture of surgical neck of humerus is identified , consistent with biomechanical principle, it is worth learning and promotion.%目的 研究肱骨近端锁定钢板结合同种异体骨治疗老年人肱骨外科颈骨折的临床治疗效果.方法 2009年1月至2011年6月,收集老年肱骨外科颈骨折住院患者98例,随机均分为观察组与对照组,观察组进行肱骨近端锁定钢板结合同种异体骨移植治疗,对照组只予肱骨近端锁定钢板治疗,随访进行Neer肩关节功能评定,比较分析其临床治疗效果.结果 本组98例患者均进行了至少6个月的随访,随访时间6~17个月,平均( 10.2±5.2)个月.观察组治疗效果满意率97.9%( 47/49),对照组75.5% (37/49),二者比较差异有统计学意义,(x2=15.235,P=0.001).结论 老年肱骨外科颈骨折进行锁定加压钢板联合同种异体骨植入治疗临床效果较确定,符合生物力学固定原则,值得借鉴和推广.

  14. Effect observation on locking plate combining with autologous iliac bone graft in the treatment of aseptic nonunion after surgery of long bone fractures of extremities%锁定钢板联合自体髂骨植骨治疗四肢长骨干骨折术后无菌性骨不连的效果观察

    Institute of Scientific and Technical Information of China (English)

    刘志军

    2014-01-01

    Objective To research and evaluate the effect of locking plate combining with autologous iliac bone graft on treating aseptic nonunion after surgery of long bone fractures of extremities. Methods 43 cases of patients with aseptic nonunion on limb long bone caused by bone fixation failure were accepted in our hospital from January 2006 to June 2013.All of patients were treated with locking plate combining with autologous iliac bone graft. Results All patients were followed up.The follow-up time ranged from 7 to 24 months,with an average of 12.6 months.All of nonunion were healed in (5.9±1.0) months.Cut surface infection occurred in 3 cases (6.9%),which were cured after treatment.The slow-ly healed wound were 2 cases (4.7%) and limb about 2 cm shortened in 1 case (2.3%).None of cases suffered from malunion.At the final follow-up,joint activity improved more significantly compared with before surgery,including 35 cases (81.4%) with excellent effect,7 cases (16.3%) moderate,and 1 case (2.3%) poor. Conclusion In the treatment of patients with aseptic nonunion after surgery of long bone fractures of extremities,using locking plate for internal fixation is a curative therapy.Locking plate combining with autologous iliac bone graft can provide reliable fixation stability for fractura,and shows good functions on bone induction and conduction,so it obtains a favorable effect.%目的:研究评价锁定钢板联合自体髂骨植骨治疗四肢长骨干骨折术后无菌性骨不连的临床效果。方法选取2006年1月~2013年6月因内固定失败而造成四肢长骨干无菌性骨不连患者43例,均采用锁定钢板固定联合自体髂骨植骨进行治疗。结果患者均获得随访,随访时间7~24个月,平均12.6个月。骨不连均愈合,愈合时间为(5.9±1.0)个月。3例(6.9%)出现切口表面感染,经治疗后均痊愈;2例(4.7%)切口延迟愈合;1例(2.3%)出现肢体短缩<2 cm,无一例发生骨折畸形愈合。末次随访时关节活

  15. Highly efficient capillary columns packed with superficially porous particles via sequential column packing.

    Science.gov (United States)

    Treadway, James W; Wyndham, Kevin D; Jorgenson, James W

    2015-11-27

    Highly efficient capillary columns packed with superficially porous particles were created for use in ultrahigh pressure liquid chromatography. Superficially porous particles around 1.5μm in diameter were packed into fused silica capillary columns with 30, 50, and 75μm internal diameters. To create the columns, several capillary columns were serially packed from the same slurry, with packing progress plots being generated to follow the packing of each column. Characterization of these columns using hydroquinone yielded calculated minimum reduced plate heights as low as 1.24 for the most efficient 30μm internal diameter column, corresponding to over 500,000plates/m. At least one highly efficient column (minimum reduced plate height less than 2) was created for all three of the investigated column inner diameters, with the smallest diameter columns having the highest efficiency. This study proves that highly efficient capillary columns can be created using superficially porous particles and shows the efficiency potential of these particles.

  16. 肱骨近段锁定板结合植骨治疗肱骨外科颈Ⅱ、Ⅲ型骨折疗效观察%Clinical Observation of Locking Proximal Humerus Plate Combining Bone Graft in Treating Humerus Surgical Neck Fracture (NearⅡ,Ⅲ)

    Institute of Scientific and Technical Information of China (English)

    李家德; 陈榆; 钟永祥; 林晓; 辛伟光; 付新美; 吴永辉; 黄杨; 颜灵松

    2011-01-01

    Objective To evaluate the clinical results of open reduction and internal fixation combining bone graft in the treatment of humerus surgical neck fracture (NeerⅡ, Ⅲ). Methods Twenty-one cases of humerus surgical neck fractures (Neer Ⅱ: 5 cases; Neer Ⅲ: 16 cases) were treated by locking proximal humerus plate combining bone grafting. Results All patients were followed for more than 6 months on average, all of the fractures were healed and got satisfactory results of shoulder functional recovery. The results were excellent and good in 18 cases, the good rate was 85.7%. Conclusion Locking proximal humerus plate fracture fragments combining bone graft is conductive to the fracture healing and shoulder functional recovery. It is an effective method in the treatment of humerus surgical neck fracture (Near Ⅱ, Ⅲ ).%目的 评价切开复位内固定加植骨治疗肱骨外科颈Ⅱ、Ⅲ型骨折的疗效.方法 采用肱骨近段锁定板结合植骨治疗肱骨外科颈骨折21例,根据Neer分型,Ⅱ型5例,Ⅲ型16例;其中二部分骨折5例,三部分骨折10例,四部分骨折6例.结果 所有病例均随访6个月以上,骨折全部愈合,肩关节功能恢复满意,优良率85.7%.结论 肱骨近段锁定板结合植骨有利于骨折断端愈合、肩关节功能的恢复,是治疗肱骨外科颈Ⅱ、Ⅲ型骨折的有效方法.

  17. S3肱骨近端锁定钢板治疗肱骨近端骨折短期疗效分析%Initial outcome and efficacy of S3 proximal humerus locking plate in the treatment of proximal humerus fractures

    Institute of Scientific and Technical Information of China (English)

    张志明; 朱雪松; 包肇华; 杨惠林

    2012-01-01

    目的 探讨S3肱骨近端锁定钢板治疗肱骨近端骨折的短期疗效.方法 应用S3肱骨近端锁定钢板治疗肱骨近端骨折22例,按Neer分型,其中二部分骨折4例,三部分骨折11例,四部分骨折7例.结果 随访时间3~15个月,平均6.2个月.术后肩关节功能参照Neer功能评分标准,优17例,良4例,可1例,优良率为95.5%.结论 新型的S3肱骨近端锁定钢板独特的设计理念给肱骨近端骨折复位后提供了牢固的软骨下支撑和内固定支架,应用该钢板治疗肱骨近端骨折可获得较好的固定效果.%Objective To explore the initial outcome and efficacy of S3 proximal humerus locking plate in the treatment of proximal humerus fractures. Methods Twenty-two patients with proximal humerus fracture were treated with the S3 proximal humerus locking plate. Most of the fractures were complex, two-part(n =4), three-part(n = 11) and four-part (ra =7) fractures according to the Neer classification of the proximal humerus fractures. Results All patients were followed up for 3 ~ 15 months. There were no complications related to the implant including loosening or breakage of the plate. Good and excellent results were documented in 17 patients and fair results in 4 patients according the Neer scores of shoulder. Conclusion New design concepts of S3 proximal humerus plate provide the subchondral support and the internal fixation support. With the addition of the proper exercise of the shoulder joint, the outcomes would be satisfied.

  18. The clinical efficacy analysis of locking proximal humerus plate in curing senile proximal humerus fractures%肱骨近端锁定钢板治疗老年肱骨近端骨骨折的临床效果分析

    Institute of Scientific and Technical Information of China (English)

    张伟; 何静; 张小军; 蒋焕泽; 郑伟平

    2015-01-01

    Objective To investigate the clinical efficacy of locking proximal humeral plate (LPPH) in curing senile proximal humerus fractures. Methods According to different forms of treatments, 40 cases of senile proximal humerus fractures in our hospital from June 2011 to June 2013, were divided into the observation group and the control group. The observation group accepted LPPH treatment, and the control group underwent conventional plate treatment, and the efficacy of the two groups was compared. Results Pain scores and activity scores of the patients after 6 months and 12 months were significantly lower than those of the control group,and there was a significant difference between good rates. Complication rate in the observation group was significantly lower than that of the control group,with statistically significant difference(P<0.05). Conclusion The efficacy of the treatment of shortened proximal humerus plate in senile proximal humerus fractures is remarkable. Locking proximal humerus plate has light pain, good functional recovery,fewer complications and other advantages,so it is worthy of clinical application.%目的:探讨肱骨近端锁定钢板(LPPH)治疗老年肱骨近端骨折的临床疗效。方法选取我院在2011年6月~2013年6月收治的肱骨近端骨折老年患者40例,根据治疗方式的不同分为观察组和对照组,观察组给予LPPH治疗,对照组行传统钢板治疗,并比较两组疗效。结果观察组患者在术后6个月和12个月时的疼痛评分以及活动度评分均明显小于对照组,两组优良率比较差异有统计学意义(P<0.05);观察组并发症发生率显著低于对照组,差异有统计学意义(P<0.05)。结论肱骨近端缩短钢板在老年肱骨近端骨折的治疗中疗效显著,且具有疼痛轻、功能恢复良好、并发症少等优势,值得临床推广应用。

  19. Curative effect analysis of locking compression plate distal ulna hook plate for fractures of the iffth metatarsal base%锁定加压钩钢板治疗第五跖骨基底部骨折的疗效分析

    Institute of Scientific and Technical Information of China (English)

    黄晓楠; 沈明杰; 范猛

    2015-01-01

    Objective To assess the clinical and radiological outcomes of locking compression plate distal ulna hook plate ( LCP-DUHP ) for fractures of the 5th metatarsal base. Methods From March 2010 to March 2012, 29 consecutive patients with fractures of the 5th metatarsal base were treated with LCP-DUHP. There were a total of 23 cases with complete follow-up data. There were 12 males and 11 females, whose mean age was 47 years old ( range:20-75 years ). As to the mechanism of injuries, falling on the ground occurred in 13 cases, a bicycle accident in 5 cases, a trafifc accident in 3 cases and high falling in 2 cases. Preoperatively, all the patients had foot and ankle swelling, pain and restricted movement. No open fractures were noticed. According to Lawrence-Botte, 18 patients had zone I fractures and 5 patients had zone II fractures. The mean period from injury to surgery was 2 days ( range:1-5 days ). The patients were followed up regularly after the operation, and the time of union, functional recovery and incidence of complications ( such as infection, delayed union, nonunion, refracture and traumatic arthritis ) were assessed. The functional outcomes were graded using the American Orthopaedic Foot and Ankle Society ( AOFAS ) midfoot scoring system. Results All the 23 patients were followed up for a mean period of 14 months ( range:11-22 months ). The incisions were primary healing in all the patients. The mean interval to partial weightbearing was 4 weeks ( range:3-6 weeks ), and the mean interval to full weightbearing was 7 weeks ( range:5-16 weeks ). All the patients returned to their regular daily lives at a mean period of 11 weeks after the surgery ( range:8-18 weeks ). In the latest follow-up, the mean AOFAS midfoot score was 94 points ( range:72-100 points ). The postoperative follow-up data showed excellent outcomes in 19 patients, good outcomes in 3 patients and fair outcomes in 1 patient. The good and excellent rate was 95.7%. Immediately postoperative

  20. The biomechanical study of medial cortex defect on axial stability of proximal humeral fracture fixed with locking plate%内侧皮质缺损对肱骨近端骨折锁定钢板内固定轴向稳定性影响的生物力学研究

    Institute of Scientific and Technical Information of China (English)

    白露; 张文涛; 江长青; 张洪雷; 黄伟; 张新涛; 李伟

    2014-01-01

    Background Proximal humeral fracture is a common injury of shoulder girdle. Currently,locking plate was widely used in management of proximal humeral fractures.Known as“internal fixator”,locking plate can provide more purchase in osteoporosis humeral head,bearing more biomechanical advantages.However,some large series of clinical research showed varus deformity became one of the main complication of proximal humeral fractures treated with locking plate that caused by axial instability.Multi-center trail found that medial cortex defect of proximal metaphyseal of humerus was an independent risk factor of reduction loss and varus malunion.Furthermore,such pathophysiological biomechanic basis was still vague.Our research was planned to study the relationship between medial cortex defect and axial stability of locking plate fixed proximal humeral fracture,in order to find inner rule of how medial cortex defect affect locking plate fixation of proximal humeral fracture.Methods Eighteen adult humerus specimen(6 pairs male),average death age 63.4 years(49-73).All the specimen were excluded bone tumor and occult fracture.Fracture model were prepared at X-Y table.Specimen were cut to 200mm from proximal to shaft.Fracture line was cut at surgical neck perpendicular to humeral shaft.Five millimeter medial cortex defect were also created by T-Saw.All the specimen were fixed using Synthesis PHILOS (Proximal Humerus Internal Osteosythesis System)following AO fixation rules.Specimens were randomized into contrast group, medial cortex half defect group and medial cortex quarter defect group.Axial compression and shear test were done in RGM-40XX2100 machine (Load scale 10 kN,± 1% ).Mechanical Load:Preload:50N,Velocity:5 mm/min,Maximum displacement:5 mm.In axial compression and shear tests,the slope of the load de ection curve was used to compute baseline axial stiffness.Each test was repeated three times and average stiffness was calculated.Statistical analyses were performed

  1. Finite element analysis of different tibial shaft fracture fixed by Locking compression plate under different movement gait%不同运动步态下锁定加压钢板固定胫骨干骨折的有限元分析*★

    Institute of Scientific and Technical Information of China (English)

    李赟罡; 陈为坚; 李贵涛; 孙鸿涛; 颜建豪; 王雄昌; 王晶

    2013-01-01

      背景:目前有限元分析广泛应用于人体骨折内固定模型的力学分析,但大多研究局限于静态下,动态下的骨折模型有限元分析尚未见报道。目的:通过三维有限元分析来探讨锁定加压钢板固定胫骨干不同类型骨折在不同运动步态下的应力分布情况。方法:利用 CT 扫描获得正常成人胫腓骨及足部的薄层扫描图像;运用相关软件建立其三维模型,在此模型上模拟出胫骨中段横行、斜行、粉碎性、螺旋形4种类型骨折,并与锁定钢板进行装配生成实验模型,各组模型加载相同的轴向压缩载荷600 N。通过有限元分析软件 Ansys 12.0分别测定各组模型在落地相、中立相、离地相三种步态下的应力分布情况。结果与结论:在步态下,胫骨在骨折各组中的应力分布由小到大均为:落地相<中立相<离地相。锁定钢板在胫骨中段横行、斜行、粉碎性骨折中的应力分布由小到大均为:中立相<落地相<离地相;在胫骨中段螺旋形骨折中应力分布由小到大为:离地相<中立相<落地相;提示在运动步态中,钢板和胫骨均在离地相受力最大。钢板的应力集中在中间或边缘;而胫骨的应力分布在骨折线以上靠近近端,骨折线以下靠近骨折线。就胫骨整体而言,呈现两端集中,中间分散的状态。%BACKGROUND: In recent years, the finite element analysis has been widely used in the mechanical analysis of human fracture internal fixation model, but studies on the finite element analysis are often under the static state, the reports on the finite element analysis under physiological state are few. OBJECTIVE: To explore the stress distribution of different tibial shaft fractures fixed by locking compression plate under different movement gaits through three-dimensional finite element analysis. METHODS: CT scan was performed to obtain the thin layer scanning image of

  2. 微创胫骨远端L型锁定钢板治疗Pilon骨折16例临床分析%Clinical Analysis of 16 Cases of Pilon Fracture Treated with Distal Tibia L Locking Plate of Minimally Invasive

    Institute of Scientific and Technical Information of China (English)

    黄绪奎

    2015-01-01

    Objective:To disscuss the operation main points and clinical therapeutic effect of Pilon fracture treated with distal tibia L locking plate of minimally invasive.Method:The data of 16 cases of Pilon fracture patients treated with distal tibia minimally invasive limited open reduction of side L locking plate internal fixation were retrospectively analyzed in our hospital from January 2013 to June 2014.11 cases of fibula segment or external ankle fractures were performed after the lateral and longitudinal incision,the decision to choose reset 1/3 tubular or reconstruction plate fixation or fibula distal lateral plate fixation according to the fracture situation.Result:6-18 months follow-up after operation,all fracture patients were reached clinical healing. No internal fixation loosening or fracture,fracture displacement,skin flap necrosis,infection of incision,complications,etc.The Johner-wruhs grading system was used to evaluate surgical curative effect,10 cases were good,4 cases were well,2 cases were medium,0 case was poor,no incision infection.Conclusion:Distal tibia L minimally invasive locking plate for Pilon fractures is with a small surgical trauma,periosteal stripping significantly reduced,thus protect fracture blood supply effectively,improve the cure rate of fracture and reduce the fracture complications.At the same time,patients in clinic are able to take early ankle function exercises,it can obtain satisfactory clinical effect.%目的:探讨采用微创胫骨远端L型锁定钢板治疗Pilon骨折的手术要点与临床治疗效果。方法:回顾分析笔者所在医院2013年1月-2014年6月16例Pilon骨折患者的资料,采用胫骨远端前侧微创有限切开复位L型锁定钢板内固定。其中合并腓骨下段或外踝骨折则作后外侧纵切口11例,复位后根据骨折情况决定选用1/3管形或重建钢板固定或腓骨远端外侧钢板固定。结果:术后随访6~18个月,所有患者均达到临床愈合。无

  3. 经皮接骨板固定技术结合锁定钢板治疗胫腓骨干骨折疗效观察%Clinical Observation of Using Minimally Invasive Percutaneous Plate Osteosynthesis Technology Combined with Locking Compression Plate in Treating Tibia and Fibula Fracture

    Institute of Scientific and Technical Information of China (English)

    付建; 顾华; 张波涛

    2012-01-01

    Objective To evaluate the clinical efficacy of using minimally invasive percutaneous plate osteosynthesis (MIPPO) technology and locking compression plate (LCP) fixation in treating tibia and fibula fracture. Methods From November 2009 to January 2012, MIPPO technology combined with LCP fixation was used to treat tibia and fibula fractures in 62 patients. There were 42 males and 20 females. Their age ranged from 16 to 85 years old with an average of 45 years. According to AO classification, there were 10 cases of type A1, 3 of type A2, 3 of type A3, 18 of type B1, 8 of type B2, 4 of type B3, 10 of type Cl, 5 of type C2, and 1 of type C3. Among the patients, there were 47 cases of closed fractures and 15 of open fractures. According to Gustilo-Anderson classification, there were 8 cases of type I , 6 of type II , and 1 of type III , open fractures. Internal fixation operation was completed in 3 hours to 10 days after the injuries and the average time was 6 days. Results Among the open fracture patients, 3 got secondary curing, 1 had necrosis on the wound skin edge, 1 got cured after dressing and debridement of the exposed plate, 1 was cured after flap transfer onto the exposed bone, and all other patients got primary healing. All the 62 patients were followed up for 6 to 16 months, and the mean time was 9 months. No infection, nerve injury, or compartment syndrome occurred and all fractures were healed 2 to 4 months after operation. According to Johner-Wruhs clinical evaluation system, the condition was excellent in 48 patients, and good in 14. Among the 15 open fracture patients, the condition was excellent in 10, and good in 5. Conclusion MIPPO technology combined with LCP fixation for tibia and fibula fractures is an effective treatment with the advantages of fewer traumas, fast fracture healing and so on.%目的 探讨应用经皮接骨板固定技术(MIPPO)结合锁定钢板(LCP)固定治疗胫腓骨骨折的疗效.方法 2009年11月-2012年1月应用MIPPO技

  4. LOCKS AND KEYS SERVICE

    CERN Multimedia

    Locks and Keys Service

    2002-01-01

    The Locks and Keys service (ST/FM) will move from building 55 to building 570 from the 2nd August to the 9th August 2002 included. During this period the service will be closed. Only in case of extreme urgency please call the 164550. Starting from Monday, 12th August, the Locks and Keys Service will continue to follow the activities related to office keys (keys and locks) and will provide the keys for furniture. The service is open from 8h30 to 12h00 and from 13h00 to 17h30. We remind you that your divisional correspondents can help you in the execution of the procedures. We thank you for your comprehension and we remain at your service to help you in solving all the matters related to keys for offices and furniture. Locks and Keys Service - ST Division - FM Group

  5. Quantum Noise Locking

    CERN Document Server

    McKenzie, K; Goda, K; Lam, P K; Grosse, N; Gray, M B; Mavalvala, N; McClelland, D E; Kenzie, Kirk Mc; Mikhailov, Eugeniy; Goda, Keisuke; Lam, Ping Koy; Grosse, Nicolai; Gray, Malcolm B.; Mavalvala, Nergis; Clelland, David E. Mc

    2005-01-01

    Quantum optical states which have no coherent amplitude, such as squeezed vacuum states, can not rely on standard readout techniques to generate error signals for control of the quadrature phase. Here we investigate the use of asymmetry in the quadrature variances to obtain a phase-sensitive readout and to lock the phase of a squeezed vacuum state, a technique which we call noise locking (NL). We carry out a theoretical derivation of the NL error signal and the associated stability of the squeezed and anti-squeezed lock points. Experimental data for the NL technique both in the presence and absence of coherent fields are shown, including a comparison with coherent locking techniques. Finally, we use NL to enable a stable readout of the squeezed vacuum state on a homodyne detector.

  6. Quantum noise locking

    Energy Technology Data Exchange (ETDEWEB)

    McKenzie, Kirk [Center for Gravitational Physics, Department of Physics, Faculty of Science, Australian National University, ACT 0200 (Australia); Mikhailov, Eugeniy E [LIGO Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Goda, Keisuke [LIGO Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Lam, Ping Koy [Quantum Optics Group, Department of Physics, Faculty of Science, Australian National University, ACT 0200 (Australia); Grosse, Nicolai [Quantum Optics Group, Department of Physics, Faculty of Science, Australian National University, ACT 0200 (Australia); Gray, Malcolm B [Center for Gravitational Physics, Department of Physics, Faculty of Science, Australian National University, ACT 0200 (Australia); Mavalvala, Nergis [LIGO Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); McClelland, David E [Center for Gravitational Physics, Department of Physics, Faculty of Science, Australian National University, ACT 0200 (Australia)

    2005-10-01

    Quantum optical states which have no coherent amplitude, such as squeezed vacuum states, cannot rely on standard readout techniques to generate error signals for control of the quadrature phase. Here we investigate the use of asymmetry in the quadrature variances to obtain a phase-sensitive readout and to lock the phase of a squeezed vacuum state, a technique which we call noise locking (NL). We carry out a theoretical derivation of the NL error signal and the associated stability of the squeezed and anti-squeezed lock points. Experimental data for the NL technique both in the presence and absence of coherent fields are shown, including a comparison with coherent locking techniques. Finally, we use NL to enable a stable readout of the squeezed vacuum state on a homodyne detector.

  7. The locking proximal humerus plate in the treatment of senile proximal humeral fractures (58 cases) clinical curative effect analysis%肱骨近端锁定钢板治疗老年肱骨近端骨折(58例)疗效分析

    Institute of Scientific and Technical Information of China (English)

    张辉; 郭盛君; 冯国英

    2014-01-01

    Objective:To evaluate and observe functional outcome of locking proximal humeral plate(LPHP) used for ifxationof the proximal humerus fractures in elderly.Method:Retrospective analysis from January 2008 to April 2013,58 patients with an acute proximal humerus fracture were managed with locking proximal humeral plate osteosynthes is after open reduction,30 cases were males,28case were females,with age of 46 to 83 ( mean 62.4).According to Neer classiifcation, 24 cases were two-partfracture,28 cases were three-part fracture,6 cases were four-part fracture. Result:All of them were with the mean follow-up of ranged 8-26 months ( mean 18 months), healing at the last review.Functional score standard of Neer was used for evaluating the shoulder function,32 cases were excellent,24 cases were good,1 cases were morderate,1 cases were poor,the excellent and good results rate was 96.6%.Conclusion:Locking proximal humeral plate osteosynthes is leads to satisfactory functional outcomes in proximal humerus fractures,which is a less complications,early functional exercise,effective therapeutic method.%目的:研究肱骨近端锁定钢板(locking proximal humeral plate,LPHP)治疗老年肱骨近端骨折的方法及疗效。方法:回顾性分析2008年1月至2013年6月58例肱骨近端骨折切开复位锁钉钢板内固定手术患者的临床资料,患者骨折部分按照Neer分型,其中Ⅱ型骨折24例,Ⅲ型骨折28例,Ⅳ型骨折6例。采用Neer评分评定治疗效果。结果:治疗后对所有患者进行平均18个月(8-26)的随访,所有患者骨折情况全部愈合,总体愈合优良率为96.6%。结论:锁定钢板治疗肱骨近端骨折,固定可靠、术后并发症少,康复时间短,能够有效防止复位丢失,保护板下血运和骨折愈合,是适用于老年群体的良好治疗方法,值得临床推广。

  8. Experimental quantum data locking

    Science.gov (United States)

    Liu, Yang; Cao, Zhu; Wu, Cheng; Fukuda, Daiji; You, Lixing; Zhong, Jiaqiang; Numata, Takayuki; Chen, Sijing; Zhang, Weijun; Shi, Sheng-Cai; Lu, Chao-Yang; Wang, Zhen; Ma, Xiongfeng; Fan, Jingyun; Zhang, Qiang; Pan, Jian-Wei

    2016-08-01

    Classical correlation can be locked via quantum means: quantum data locking. With a short secret key, one can lock an exponentially large amount of information in order to make it inaccessible to unauthorized users without the key. Quantum data locking presents a resource-efficient alternative to one-time pad encryption which requires a key no shorter than the message. We report experimental demonstrations of a quantum data locking scheme originally proposed by D. P. DiVincenzo et al. [Phys. Rev. Lett. 92, 067902 (2004), 10.1103/PhysRevLett.92.067902] and a loss-tolerant scheme developed by O. Fawzi et al. [J. ACM 60, 44 (2013), 10.1145/2518131]. We observe that the unlocked amount of information is larger than the key size in both experiments, exhibiting strong violation of the incremental proportionality property of classical information theory. As an application example, we show the successful transmission of a photo over a lossy channel with quantum data (un)locking and error correction.

  9. Locke and botany.

    Science.gov (United States)

    Anstey, Peter R; Harris, Stephen A

    2006-06-01

    This paper argues that the English philosopher John Locke, who has normally been thought to have had only an amateurish interest in botany, was far more involved in the botanical science of his day than has previously been known. Through the presentation of new evidence deriving from Locke's own herbarium, his manuscript notes, journal and correspondence, it is established that Locke made a modest contribution to early modern botany. It is shown that Locke had close and ongoing relations with the Bobarts, keepers of the Oxford Botanic Garden, and that Locke distributed seeds and plant parts to other botanists, seeds of which the progeny almost certainly ended up in the most important herbaria of the period. Furthermore, it is claimed that the depth of Locke's interest in and practice of botany has a direct bearing on our understanding of his views on the correct method of natural philosophy and on the interpretation of his well known discussion of the nature of species in Book III of his Essay concerning human understanding.

  10. 改良前外侧入路胫骨近端锁定加压钢板固定治疗胫骨平台后外侧骨折%CLINICAL EFFECT OF IMPROVED ANTEROLATERAL PROXIMAL TIBIA AFTER LOCKING COM- PRESSION PLATE FIXATION IN THE TREATMENT OF LATERAL TIBIA PLATEAU FRACTURE

    Institute of Scientific and Technical Information of China (English)

    何建华

    2015-01-01

    Objective To analyze the clinical effect of modified anterolateral proximal tibia locking compres‐sion plate fixation in patients with lateral tibia plateau fracture .Methods Totally 80 cases of tibia plateau lateral fracture patients were treated in author's hospital from March 2011 to March 2013 were randomly di‐vided into observation group and control group .The control group received conventional treatment methods anterolateral approach ,while the observation group received an improved anterolateral approach proximal tibia compression plate fixation ,and then the clinical effect were compared between the two groups .Results There were significant difference (P The modified anterolateral proximal tibia locking compression plate fixation is worthy of clinical use for patients of the poster lateral tibia plateau fractures with a significant effect ,simple and safe operation .%目的:分析改良前外侧入路胫骨近端锁定加压钢板固定治疗胫骨平台后外侧骨折的临床效果。方法将收治的80例胫骨平台后外侧骨折患者随机分为观察组和对照组,对照组给予传统前外侧入路的治疗方法,观察组给予改良前外侧入路胫骨近端加压钢板固定治疗,分析和比较二组患者的治疗效果。结果二组患者平均手术时间、手术出血量、并发症发生率等各手术参数、随访结果及膝关节功能评分的比较差异有统计学意义(P<0.05)。结论改良前外侧入路胫骨近端锁定加压钢板固定治疗胫骨平台后外侧骨折疗效显著、操作简便、安全性高,值得临床推广使用。

  11. 锁定接骨板治疗老年肱骨近端骨折的术后并发症与远期疗效分析%Analysis of postoperative complications and long-term curative effect of elderly patients with proximal humerus fractures by locking proximal humerus plate

    Institute of Scientific and Technical Information of China (English)

    朱建举; 罗灵敏

    2016-01-01

    Objective To analyze the postoperative complications and long-term curative effect analysis of elderly patients with proximal humerus fractures by locking proximal humerus plate,and provide reference for such patients’clinical treatment.Methods A total of 92 elder patients with proximal humerus fractures in our hospital from September 2012 to September 2014 were included in the research.They were divided into control group (who were treated with anatomical bone plates)and observation group (who were treated with locking plates),according to different sugrical methods.The postoperative complications situation and long-term curative effect analysis of two groups were compared.Results The proportions of humerus head varus malunion and humerus head necrosis of observation group were less than those of control group,with statistically significant difference(P <0.05).And after six months of follow-up,the excellent rate of observation group were 89.1%,significantly more than control group 67.4%,with statistically significant difference(P <0.05).Conclusion The loc-king plate used in elderly patients with proximal humerus fractures can effectively reduce the occurrence of postoperative complications,and it has excellent long-term curative effect.%目的:分析锁定接骨板治疗老年肱骨近端骨折的术后并发症情况与远期疗效,为提高该类患者的临床治疗提供参考依据。方法选取2012年9月至2014年9月在本院接受手术治疗的92例老年肱骨近端骨折患者为研究对象,按手术方法分为对照组(解剖接骨板治疗)和观察组(锁定接骨板治疗),各46例。比较2组患者的并发症发生情况和远期疗效。结果观察组患者术后出现肱骨头内翻畸形愈合和肱骨头坏死的比例均少于对照组,差异均有统计学意义(P <0.05)。随访6个月后,观察组患者的治疗优良率为89.1%,高于对照组的67.4%,差异具有统计学意义(P <0

  12. Effect analysis of anterior transposition of the ulnar nerve for double locking plate fixation in the treatment of patients with humeral intercondylar fracture%肱骨髁间骨折双锁定钢板内固定尺神经前置的临床效果分析

    Institute of Scientific and Technical Information of China (English)

    孟德强; 刘德昌; 张新潮

    2015-01-01

    目的:探讨尺神经前置对双锁定钢板内固定治疗肱骨髁间骨折患者临床疗效的影响。方法将我院骨科2008年2月~2013年2月收治的113例肱骨髁间骨折患者随机分为两组,两组均行双锁定钢板内固定,观察组在此基础上行尺神经前置手术,比较两组的临床疗效。结果观察组手术时间大于对照组,差异有统计学意义(P<0.01),住院时间、骨折愈合时间小于对照组,差异有统计学意义(P<0.01),两组手术出血量差异无统计学意义(P>0.05);观察组肘关节功能恢复情况优于对照组,差异有统计学意义(Z=-2.177,P=0.029);术后两组并发症有切口红肿、皮下血肿、钢板断裂、神经损伤,差异无统计学意义( P>0.05),经对症治疗及综合护理,两组的并发症基本缓解。结论尺神经前置术在双锁定钢板内固定肱骨髁间骨折患者中具有促进临床疗效、改善肘关节功能和减少不良反应等特点。%Objective To investigate the clinical efficacy of anterior transposition of the ulnar nerve for double locking plate fixation in the treatment of patients with humeral intercondylar fracture. Methods A total of 113 cases of humeral intercondylar fractures treated in our hospital from Feb. 2008 to Feb.2013 were randomly di-vided into two groups. Both groups underwent double locking plate fixation and the observation group was also per -formed ulnar nerve transposition. The clinical efficacy of the two groups was compared. Results Operation time of the observation group was more than that of the control group, the difference was statistically significant (P0.05);The function recovery of elbow joint of the observation group was better than that of the control group, the difference was statistically significant ( Z=-2.177,P=0.029);complications of the two groups after operation in-cluded incision swelling, subcutaneous hematoma, plate fracture

  13. Biomechanical comparison of orthogonal versus parallel double plating systems in intraarticular distal humerus fractures

    Directory of Open Access Journals (Sweden)

    Ata C. Atalar

    2017-01-01

    Conclusion: Our study showed that both plating systems had similar biomechanical stabilities when anatomic plates with distal locking screws were used in intraarticular distal humerus fractures in artificial humerus models.

  14. 钢管混凝土边框内藏带斜肋钢板中高剪力墙抗震性能试验%Experiments on the seismic behavior of mid-rise shear walls with CFST boundary columns and concealed steel plates with diametrically opposed cross-braces

    Institute of Scientific and Technical Information of China (English)

    董宏英; 张文江; 曹万林; 于传鹏

    2013-01-01

    提出了钢管混凝土边框内藏斜撑肋钢板组合中高剪力墙.为研究这种组合剪力墙的抗震性能,进行了5个不同构造的中高剪力墙模型低周反复荷载试验.分析了试件的损伤特征、承载力、耗能、滞回特性,提出了正截面抗弯承载力计算模型,计算结果与试验符合较好.研究表明:钢管混凝土边框内藏钢板组合剪力墙具有较高的承载力和良好的耗能性能;钢管混凝土边框内藏带斜撑肋钢板中高剪力墙,适于在墙体厚度小于钢管尺寸或内藏钢板厚度较薄的“强边框、弱墙体”情况下应用,可明显减轻钢管混凝土边框底部的损伤,延缓墙体性能退化,提高组合剪力墙的抗震能力.%A new design of mid-rise shear wall with CFST columns and concealed steel plate with diametrically opposed cross-braces is hereby set forward.In order to quantify its seismic behavior,5 mid-rise shear wall specimens are tested under low frequency cyclic loading.The ensuing failure characteristics,load-bearing and energy dissipation capacities,hysteretic behavior of these specimens are discussed herein.The calculated model of bend resistant load-bearing capacity is established and the results agree well with the experimental ones.The experiments show that the composite shear walls with CFST columns and embedded steel plate have a higher load-bearing and better energy dissipation capacities compared to conventional mid-rise shear walls.The proposed mid-rise shear wall with CFST boundary columns and concealed steel plate with diametrically opposed cross-braces is suitable for shear walls where thickness is smaller than the cross section of the CFST columns or shear walls with low-thickness embedded steel plates.The inclined cross-braces reduce the damage typically seen at the bottom of CFST columns,delay the stiffness degradation,and improve the integrative seismic behavior of the entire wall.

  15. Pressure locking test results

    Energy Technology Data Exchange (ETDEWEB)

    DeWall, K.G.; Watkins, J.C.; McKellar, M.G.; Bramwell, D. [Idaho National Engineering Lab., Idaho Falls, ID (United States)] [and others

    1996-12-01

    The U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, is funding the Idaho National Engineering Laboratory (INEL) in performing research to provide technical input for their use in evaluating responses to Generic Letter 95-07, {open_quotes}Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves.{close_quotes} Pressure locking and thermal binding are phenomena that make a closed gate valve difficult to open. This paper discusses only the pressure locking phenomenon in a flexible-wedge gate valve; the authors will publish the results of their thermal binding research at a later date. Pressure locking can occur when operating sequences or temperature changes cause the pressure of the fluid in the bonnet (and, in most valves, between the discs) to be higher than the pressure on the upstream and downstream sides of the disc assembly. This high fluid pressure presses the discs against both seats, making the disc assembly harder to unseat than anticipated by the typical design calculations, which generally consider friction at only one of the two disc/seat interfaces. The high pressure of the bonnet fluid also changes the pressure distribution around the disc in a way that can further contribute to the unseating load. If the combined loads associated with pressure locking are very high, the actuator might not have the capacity to open the valve. The results of the NRC/INEL research discussed in this paper show that the relationship between bonnet pressure and pressure locking stem loads appears linear. The results also show that for this valve, seat leakage affects the bonnet pressurization rate when the valve is subjected to thermally induced pressure locking conditions.

  16. 钢板箍螺栓连接高强复合螺旋箍装配整体式柱抗震性能试验%SEISMIC BEHAVIOR RESEARCH OF STEEL PLATE HOOP-BOLT PREFABRICATED COLUMN CONFINED BY HIGH-STRENGTH COMPOSITE SPIRAL STIRRUPS

    Institute of Scientific and Technical Information of China (English)

    李进; 陈鹏; 魏威; 李青宁

    2014-01-01

    通过低周反复拟静力试验方法,研究钢板箍螺栓连接装配整体式柱的抗震性能。试验共设计4根长柱试件,观察各试件开裂、屈服、破坏全过程和破坏状态,得出各试件荷载-位移滞回曲线和骨架线,对比研究各试件承载力、延性和耗能能力,研究钢板箍螺栓连接方式的可行性。试验证明:钢板箍螺栓连接高强复合螺旋箍筋装配整体式柱和现浇整体柱具有相当的承载力和抗震能力,在连接可靠的情况下可以在工程中代替现浇柱。%In order to study the seismic behavior of steel plate hoop-bolt prefabricated column by high-strength composite spiral stirrups , the low cyclic loading tests were carried out .Four long column specimens were designed . Cracking, yield, destroyed process and destroyed state of specimens were observed in the tests , and the load-displacement hysteretic curves and skeleton curves of each specimen were also obtained .Comparative study on carrying capacity , ductility and energy dissipation capacity of each specimen was conducted , and analysis of the reliability of steel plate hoop-bolt connection was done .The test proves that steel plate hoop-bolt prefabricated column confined by high-strength composite spiral stirrups has about the same bearing capacity and seismic capacity as compared with cast-in-place column, and the prefabricated column can be used to replace the cast-in-place column in project in case of secure connections .

  17. 锁定加压接骨板治疗股骨远端良性骨肿瘤刮除植骨术后早期病理骨折的临床初步探讨%The clinical efficacy of locking compression plate in early stage pathological fracture after curettage and grafting of the benign distal femur tumor

    Institute of Scientific and Technical Information of China (English)

    赵军; 杨蕴; 韩秀鑫; 张瑾; 廖智超; 杨吉龙; 邢汝维

    2012-01-01

    [Objective] To determine the clinical efficacy of locking compression plate in early stage pathological fracture after curettage and grafting of the benign distal femur tumor. [ Method ] Our department had treated 11 patients with early stage pathological fracture after curettage and grafting of the benign distal femur tumor, including 7 male and 4 female patients with the average age of 42. 7 years whose ages ranging from 16 to 61 years. The types of primary tumor in these patients were;2 patients with enchondroma, 1 with primary osteoclastoma,4 with chondroblastoma,3 with chondromyxoid fibroma of bone, 1 with eosinophilic granulomatosis. The times between the curettage and grafting to the fracture were from 21 to 36 days with the average time of 22. 3 days. The types of distal femur fracture in these patients were all type Al who were treated with evenly locking compression plate, internal fixation and bone grafting. [ Result ] One patient in 11 had infection in wound, another had blood clots in popliteal vein after surgery which improved within treatment. No patients had complications as immunological rejection, incorrect reduction of fracture, loosening and rupture of internal fixation, refracture, tumor recurrence and secondary arthritis. The follow-up time were 12 to 61 months with average follow-up time of 34. 4 months. Their knee joint functions all returned to normal range of activity including the flexion of 120°to 135°and the hyperextension of 0°to 5° ,MSTS lower extremity scores were 28 -30 points with average scores of 28.9 points. [Conclusion]The internal fixation of locking compression plate has good mechanical property with fixedness and reliableness which contributes to the healing of facture and the restoration of tumor cavity grafting. Besides, it could assist functional practice in early stage to restore knee joint function. The locking compression plate is a potent internal fixation for early stage pathological fracture after curettage and

  18. Effect of parallel segmented flow chromatography on the height equivalent to a theoretical plate III--influence of the column length, particle diameter, and the molecular weight of the analyte on the efficiency gain.

    Science.gov (United States)

    Gritti, Fabrice; Pynt, Jarrod; Soliven, Arianne; Dennis, Gary R; Shalliker, R Andrew; Guiochon, Georges

    2014-03-14

    The effects of column length on performance in segmented flow chromatography were tested. Column efficiencies were measured for 4.6mm I.D. 3, 5, 7.5 and 10 cm long columns packed with 3.0 μm Hypurity-C18 fully porous particles and of 4.6mm I.D. 5, 10, 15 and 25 cm long columns packed with 5 μm Hypersil GOLD C18 particles. For each column length and particle type, two different configurations were tested: (1) both the inlet and outlet column endfittings were standard and (2) the inlet endfitting was standard but the outlet endfitting allowed parallel segmentation of the exiting flow into a central and a peripheral coaxial region. The segmentation flow ratio was set at 45% (for 3 μm) and at 43% or 21% (for 5 μm). Four samples were used, naphthalene, toluene, butylbenzene, and insulin, which has a ten times smaller diffusion coefficient than the small molecules. The column performance for the low molecular weight compound is significantly improved at velocities above the optimum value when the outlet flow rate is segmented because longitudinal diffusion and mass transfer resistance of this compound in the stationary phase are negligible sources of band broadening at reduced linear velocities between 5 and 25. At high flow rate (4 mL/min), the long-range eddy dispersion terms are about 3.9, 3.2, 2.6, and 1.8h unit lower for the 3, 5, 7.5 and 10 cm long columns, respectively. The longer the column, the lower the efficiency improvement because the border effects are smaller. This result was not systematically observed for the columns packed with 5 μm particles because the transverse dispersion is larger. In contrast, the gain in column efficiency is marginal for insulin because the mass transfer mechanism of this compound is mostly controlled by the slow diffusivity of insulin across Hypurity-C18 particles.

  19. Resonance vector mode locking

    CERN Document Server

    Kolpakov, Stanislav A; Loika, Yuri; Tarasov, Nikita; Kalashnikov, Vladimir; Agrawal, Govind P

    2015-01-01

    A mode locked fibre laser as a source of ultra-stable pulse train has revolutionised a wide range of fundamental and applied research areas by offering high peak powers, high repetition rates, femtosecond range pulse widths and a narrow linewidth. However, further progress in linewidth narrowing seems to be limited by the complexity of the carrier-envelope phase control. Here for the first time we demonstrate experimentally and theoretically a new mechanism of resonance vector self-mode locking where tuning in-cavity birefringence leads to excitation of the longitudinal modes sidebands accompanied by the resonance phase locking of sidebands with the adjacent longitudinal modes. An additional resonance with acoustic phonons provides the repetition rate tunability and linewidth narrowing down to Hz range that drastically reduces the complexity of the carrier-envelope phase control and so will open the way to advance lasers in the context of applications in metrology, spectroscopy, microwave photonics, astronomy...

  20. 肱骨近端锁定加压钛板治疗老年肱骨外科颈骨折的疗效观察%Clinical effect of humerus surgical neck fracture in elders with locking compression proximal humerus plate

    Institute of Scientific and Technical Information of China (English)

    曾峥; 艾依热提·买买提; 王冰; 潘海涛; 王宝

    2015-01-01

    Objective To investigate the clinical effect of locking compression proximal humerus plate fixation for aged patients with humerus surgical neck fractures. Methods From August 2007 to August 2012, 32 aged patients with humerus surgical neck fractures (13 males, 19 females, with the mean age of 66.7 years old) underwent open reduction in-ternal fixation with locking compression proximal humerus plate. According to Neer classification, 7 cases of two parts frac-ture, 16 cases of three parts fractures and 9 cases of four parts fractures were included. Results The mean operation time was (58±24)min, the blood loss was (135±28)ml. According to the Neer criteria, the treatment results were excellent in 21 cases, good in 8 cases, fair in 2 cases and poor in 1 case. The rate of excellent and good effect was 90.6%. Conclusion Treatment of humerus surgical neck fracture in aged patients with locking compression plate can obtain reliable reduction, and with less complications and satisfactory therapeutic effect.%目的:探讨应用肱骨近端锁定加压钛板系统治疗老年肱骨外科颈骨折的疗效。方法总结2007年8月至2012年8月采用肱骨近端锁定加压钛板系统切开复位治疗老年肱骨外科颈骨折32例的临床资料,男13例,女19例;年龄59~78岁,平均66.7岁;Neer分型,二部分骨折7例,三部分骨折16例,四部分骨折9例。结果术后X线显示钛板螺钉位置良好,骨折复位满意,无神经血管损伤。手术时间平均(58±24)min,术中出血量平均(135±28)ml。根据Neer肩关节功能评分系统进行评分,优21例,良8例,可2例,差1例,优良率达90.6%。结论肱骨近端锁定加压钛板具有置钉角度科学、固定可靠、可早期行功能锻炼等优点,较适用于老年骨质疏松粉碎性肱骨外科颈骨折的治疗。

  1. Combined application of vascularized pedicled pectoralis major clavicular periosteal flap and locking plate fixation plus bone morphogenetic protein implantation in the treatment of clavicular defect and nonunion after operation%带血管胸大肌蒂锁骨膜联合锁定钛板固定BMP植入治疗锁骨术后骨不愈合及骨缺损

    Institute of Scientific and Technical Information of China (English)

    孙强; 郑加法

    2009-01-01

    目的 探讨锁骨骨折术后骨缺损、骨折不愈合的临床特点,评价锁定钛板固定骨形态发生蛋白(bone morphogenetic protein,BMP)植入联合带血管胸大肌蒂锁骨膜转位的治疗效果.方法 2004年1月-2008年4月,锁骨骨折不愈合12例,平均年龄42.8岁,均行内固定物取出,清除骨折端纤维瘢痕及硬化骨,锁定钛板同定BMP植入,带血管胸大肌蒂锁骨膜转位覆盖,术后进行功能康复锻炼. 结果 12例患者术后均获得随访,时间8~24个月,平均1.2年,应用Constant-Murley肩关节评分系统进行评价,所有患者均在4~7个月达到临床愈合,部分患者已将内固定物取出. 结论 锁定钛板固定BMP植入联合带血管胸大肌蒂锁骨膜转位治疗锁骨骨缺损、骨不连,可取得良好的临床效果.%Objective To investigate the clinical characteristics of clavicular defect and nonunion after operation and evaluate the clinical effects of vascularized pedicled pectoralis major clavicular periosteal flap and locking plate fixation plus bone morphogenetic protein (BMP) implantation. Methods From January 2004 to April 2008, 12 patients (mean age, 42.8 years old) with clavicular defect and nonunion were treated in Zhongshan Hospital. The internal fixators were removed, and then fibrous scars and sclerotic bones were cleared. The clavicular detects were fixed with locking plate, with implantation of the BMP. The wound was covered with vascularized pedicled pectoralis major clavicular periosteal flap. Postoperative functional rehabilitation exercises were performed. Results All patients were followed up for 8-24 months (mean 1.2 years). The clinical results were evaluated by Constant-Murley scoring system. The clavicular defects were healed in all patients within 4-7 months, and the internal fixators were successfully removed from some of the patients. Conclusions Vascularized pedicled pectoralis major clavicular periosteal flap combined with locking plate fixation

  2. 改良股骨近端锁定板内固定治疗股骨粗隆间合并粗隆下骨折的疗效观察%Curative Effect Observation of the Modified Proximal Femoral Locking Plate Internal Fixation in the Treatment of Intertrochanteric Combined Subtrochanteric Fracture

    Institute of Scientific and Technical Information of China (English)

    董必成; 李朝军; 尹东武; 杨利; 白虎荣; 冯文顺; 李小健

    2015-01-01

    Objective:To investigate the curative effect observation of the modified proximal femoral locking plate internal fixation in the treatment of intertrochanteric combined subtrochanteric fracture.Method:The clinical data of 18 patients with intertrochanteric combined subtrochanteric fracture in our hospital from January 2009 to May 2015 were retrospectively analyzed.They were treated with the modified proximal femoral locking plate internal fixation,and the treatment effect was observed.Result:The operation time of the group was 80-120 min,the intraoperative bleeding was 400-800 mL,the average was 510 mL.All patients were healed by first intention,during a mean 14(6 to 18 months) months following-up,the fracture were healed.The postoperative functional recovery of hip joint in the follow-up according to Harris score standard,excellent in 10 cases,good in 4 cases,fair in 4 cases,the excellent and good rate was 77.8%.Conclusion:The clinical effect of the modified proximal femoral locking plate internal fixation in the treatment of intertrochanteric combined subtrochanteric fracture is reliable,fracture anatomical reduction,stable internal fixation, high fracture healing rate and less complications,is worthy of clinical popularization and application.%目的:探讨改良股骨近端锁定板内固定治疗股骨粗隆间合并粗隆下骨折的疗效观察。方法:回顾性分析本院2009年1月-2015年5月治疗的18例股骨粗隆间合并粗隆下骨折患者的临床资料,所有患者均采用改良股骨近端锁定板内固定进行治疗,观察其治疗效果。结果:本组手术时间80~120 min,术中出血400~800 mL,平均510 mL。所有患者切口Ⅰ期愈合,随访6~18个月,平均14个月骨折愈合。本次随访髋关节术后功能恢复根据Harris评分标准,评定优10例,良4例,可4例,优良率为77.8%。结论:改良股骨近端锁定板内固定治疗股骨粗隆间合并粗隆下骨折临床效果可靠,骨

  3. Comparison between a spray column and a sieve tray column operating as liquid-liquid heat exchangers

    Science.gov (United States)

    Keller, A. S.; Jacobs, H. R.; Boehm, R. F.

    The reported investigation was conducted in connection with research intended to improve the efficiency of direct contact devices for geothermal and solar applications. The investigation had the objective to evaluate the effect of adding sieve trays to the laboratory column used in studies concerned with the development of models for spray column heat transfer. Hot water is pumped from a supply vessel into the top of the heat exchanger column where, as the continuous phase, it flows down through the column. The dispersed phase is kerosene. Using an identical pump to that used for the water, the kerosene flows into a dispersion plate in the bottom of the column. The droplets rise through the column and coalesce at the top. It was found that the heat transfer performance of the perforated plate column was significantly improved over that in a spray column for similar operating conditions.

  4. Anchoring FRP laminates for the seismic strengthening of RC columns

    OpenAIRE

    Sadone, Raphaëlle; Quiertant, Marc; FERRIER, Emmanuel; Chataigner, Sylvain; Mercier, Julien

    2012-01-01

    This paper aims to examine the effectiveness of seismic strengthening of reinforced concrete (RC) columns by externally bonded Fibre Reinforced Polymer (FRP). Particularly, a novel strengthening system, designed for the flexural strengthening of columns is studied. This flexural strengthening is achieved by FRP plates bonded longitudinally and anchored at the column-stub junction. The proposed system is validated through an experimental campaign carried out on full-scale RC columns. Different...

  5. 应用肱骨近端锁定型钢板治疗肱骨近端骨折的回顾性研究%A retrospective study after treatment of proximal humeral fractures with locking plates

    Institute of Scientific and Technical Information of China (English)

    董军政; 申海波; 李延明; 王利民; 朱以明; 姜春岩

    2010-01-01

    目的 探讨AO Philos钢板治疗肱骨近端骨折手术体会.方法 回顾性分析2006年7月-2009年5月应用AO Philos钢板治疗肱骨近端骨折29例,按Neer分型2部分骨折11例,3部分骨折16例,4部分骨折2例.结果 29例患者均获得随访,时间9~16个月,平均11.3个月,功能评定采用肩关节Neer功能评分标准:优13例,良12例,可4例,优良率86.2%.结论 AO Philos钢板治疗肱骨近端骨折具有手术创伤小,固定有效可靠,允许早期功能锻炼,疗效确切.%Objective The purpose of our study was to evaluate the treatment of proximal humeral fractures with AO Philos plate. Methods From June 2007 to May 2009, 29 cases of proximal humeral fractures were fixed with AO Philos plate. According to Neer classification, 11 cases were two-part fractures, 16 cases three-part fractures and 2 cases four-part fractures. Results Twenty-nine cases were followed 9-16 months (averaging 11.3 months). The results were evaluated with Neer's evaluation system: 13 patients were graded as excellent,12 as good, 4 as fair. Conclusion AO Philos plate is less invasive comparing with traditional method. It can provide solid fixation, permit early functional rehabilitation and lead to a compromising clinical result.

  6. 低切迹解剖锁定钢板治疗成人锁骨中段骨折的临床疗效%Analysis on the clinical curative effects of low-profile locking anatomic plate therapy on the middle clavicular fracture of adult

    Institute of Scientific and Technical Information of China (English)

    敖荣广; 禹宝庆; 姜新华; 叶秀章; 施继飞; 许大峰

    2015-01-01

    Background Middle clavicular fracture is a clinically common fracture,and there are still disputes over its operation indications.According to literature reports over recent years,in comparison with conservative treatment, operative treatment on middle clavicular fracture with obvious fracture displacement has lower complications (including symptomatic malunion and bone ununion),faster functional rehabilitation and functional result.However,there are some disputes over the selection of internal fixators during operation.In particular,since the patients have higher requirments for appearance and functions,the occurrence rate of internal fixator relevant complications has been gradually rising.However,theoretically,the clinical curative effects of low-profile locking anatomic plate can avoid the traditional clavicular plate related complications to certain extent.During the period from January 2012 to December 12,our department adopted ow-profile locking anatomic plate in the treatment of 38 adult cases of middle clavicular fracture,obtained integral follow-up data of 36 cases and achieved good curative effects.The specific conditions are hereby reported as follows. Method I.General materials:This groups includes totaled 36 cases (20 male cases and 1 6 female cases);they are aged 18-60,with an average age of 38.0 years.Injury causes:traffic injury 9 cases, motorcycle falling injury 8 cases,bicycle falling injury 8 cases,exercise falling injury 6 cases and other injury 5 cases.Classification by the standard established by US Orthopaedic Trauma Association (OTA):8 cases of A type,4 cases of B type and 1 6 cases of C type;All the patients received open reduction and internal fixation with low-profile locking anatomic plate in a week after injury.Case inclusion criteria:(1)Middle clavicular fracture with obvious displacement,with shortening >2 cm;has obvious angulation deformity and risk of piercing skin.Case exclusion criteria:(1)Displacement of less than 2 cm;(2

  7. Comparison between External Fixator Combined with Kirschner Wire and Internal Fixation with Locking Compression Plate in the Treatment of Type C Fractures of Distal Radius%外固定架结合克氏针与锁定钢板内固定治疗桡骨远端C型骨折的疗效对比

    Institute of Scientific and Technical Information of China (English)

    郑创义; 黄钟炼; 陈舜亮

    2015-01-01

    Objective:To compare the clinical efficacy between external fixator combined with kirschner wire technique and internal fixation with locking compression plate in the treatment of type C fractures of distal radius.Method:Thirty-eight patients with type C distal radial fractures from February 2007 to January 2014 were selected as the study objects.Twenty-one patients who underwent external fixator combined with kirschner wire were classified into group A.Seventeen patients who underwent open reduction and internal fixation with locking compression plate through volar were classified into group B.According to the AO classification,there were 5 cases of type C1,8 cases of type C2 and 8 cases of type C3 in group A.5 cases of type C1, 5 cases of type C2 and 7 cases of type C3 in group B.After the operation all patients were followed up with the use of radiographs and the wrist joints function was assessed by Dienst Scores.Result:All patients were followed up for 4 to 13 months(average 8.6 months).All fractures united in 3 to 8 months(average 5.3 months).There were 2 cases of pin tract infection and 2 cases of pin loosening and withdrawal in group A.There were 2 cases occurred loss of reduction and screws penetrated into the joint cavity in group B.The differences in the excellent and good rates of the wrist joint function of type C1 fractures and type C2 fractures between group A and group B were not significant(P>0.05).The excellent and good rates of wrist joint function of type C3 fractures were significantly higher in group A than in group B(P0.05),C3型骨折A组优于B组(P<0.05)。结论:对于闭合性桡骨远端C1、C2型骨折,可选择外固定架结合克氏针固定或锁定钢板内固定术,而对于C3型骨折,选择外固定架结合克氏针固定术疗效相对较佳。

  8. Reasoning about Java's Reentrant Locks

    NARCIS (Netherlands)

    Haack, C.; Huisman, Marieke; Hurlin, C.; Ramalingam, G.

    2008-01-01

    This paper presents a verification technique for a concurrent Java-like language with reentrant locks. The verification technique is based on permission-accounting separation logic. As usual, each lock is associated with a resource invariant, i.e. when acquiring the lock the resources are obtained

  9. Locks and Keys Service

    CERN Multimedia

    Claude Ducastel

    The GS-LS-SEM section is pleased to inform you that as from Monday 30 November 2009, the opening hours of the Locks and Keys service will be the following: 08h30 - 12h30 / 13h30 - 16:30, Mondays to Fridays. GS-SEM-LS 73333

  10. LOCKE Detailed Specification Tables

    CERN Document Server

    Menezo, Lucia G; Gregorio, Jose-Angel

    2012-01-01

    This document shows the detailed specification of LOCKE coherence protocol for each cache controller, using a table-based technique. This representation provides clear, concise visual information yet includes sufficient detail (e.g., transient states) arguably lacking in the traditional, graphical form of state diagrams.

  11. The Dissipative Column: A New Hysteretic Damper

    OpenAIRE

    Bruno Palazzo; Paolo Castaldo; Ivana Marino

    2015-01-01

    A new replaceable hysteretic damper to better control seismic building damage, consisting of two or more adjacent steel vertical elements connected to each other with continuous mild/low strength steel shear links, is proposed and investigated in this paper. New Dampers, called Dissipative Columns (DC), continuously linked with X-shaped steel plates, provide additional stiffness and damping to a lateral system by using a basic and minimally invasive construction element: the column. Working i...

  12. Avaliação das complicações do tratamento cirúrgico das fraturas da extremidade proximal do úmero com "placa bloqueada" Evaluation of the complications of surgical treatment of fractures of the proximal extremity of the humerus using a locking plate

    Directory of Open Access Journals (Sweden)

    Alberto Naoki Miyazaki

    2012-10-01

    Full Text Available OBJETIVO: Avaliar as complicações do tratamento cirúrgico dos pacientes com fratura da extremidade proximal do úmero com "placa bloqueada". MÉTODOS: Entre julho de 2004 e dezembro de 2009, foram tratados 56 pacientes com fratura da extremidade proximal do úmero com a placa Philos®. Dezenove pacientes eram do sexo masculino e 37 do feminino, com média de idade de 62 anos, variando de 30 a 92 anos. Todos os casos tinham tempo de seguimento mínimo, no período pós-operatório, de 12 meses. Treze fraturas foram classificadas como em duas partes, 28 em três, oito em quatro e sete como fraturas epifisárias. RESULTADOS: Dos pacientes operados, 26 foram considerados como tendo obtido resultado excelente, 12 como bom, 10 como regular e oito como ruim, conforme o escore de UCLA. Trinta complicações ocorreram em 20 pacientes (35,7%, sendo a mais frequente a redução inadequada da fratura que ocorreu em oito casos. O impacto subacromial causado pela placa ocorreu em sete casos, enquanto a fixação inadequada da fratura em seis. Outras complicações como pseudoartrose, capsulite adesiva, necrose avascular, perda da redução em varo e infecção também foram verificadas. CONCLUSÃO: Os resultados funcionais do tratamento das fraturas da extremidade proximal do úmero com a "placa bloqueada" dependem da correta redução anatômica da fratura e fixação estável do implante. Complicações ainda são frequentes, principalmente devido à dificuldade técnica intraoperatória, à gravidade da fratura e à eventual inexperiência do cirurgião.OBJECTIVE: To evaluate the complications from surgical treatment using a locking plate among patients with fractures of the proximal extremity of the humerus. METHODS: Between July 2004 and December 2009, 56 patients with fractures of the proximal extremity of the humerus were treated using the PHILOS® plate. There were 19 male patients and 37 female patients, with a mean age of 62 years (range: 30 to

  13. Limited open reduction and internal fixation with anatomical locking compression plate for treatment of tibial Pilon fractures%有限切开复位结合锁定加压接骨板内固定治疗胫骨Pilon骨折

    Institute of Scientific and Technical Information of China (English)

    魏世隽; 蔡贤华; 刘曦明; 江新; 付强; 钱胜龙

    2013-01-01

    目的 探讨踝关节面有限切开复位结合微创接骨术(minimally invasive plate osteosynthesis,MIPO)置入锁定加压接骨板(locking compression plate,LCP)内固定治疗胫骨Pilon骨折的方法及临床疗效. 方法 选择2009年8月-2011年8月收治的21例胫骨Pilon骨折患者,其中男16例,女5例;年龄21 ~68岁,平均42.3岁.骨折根据AO/OTA分型:43B型12例,43C型9例;开放性骨折2例(均为Gustilo-AndersonⅠ型).采用有限切开复位踝关节面,结合MIPO技术置入LCP内固定的方法进行治疗,术后非负重早期功能锻炼. 结果 21例手术患者中19例术后获得12 ~24个月随访,平均14个月.应用Burwell-Chamley影像学评价标准判定骨折复位质量,关节面获得解剖复位17例,复位一般2例,以上患者骨折均获得骨性愈合.根据Mazur等制定的踝关节评分系统进行术后功能评价:优7例,良10例,可2例,差0例,优良率达89%. 结论 有限切开复位结合LCP内固定治疗Pilon骨折能有效重建关节解剖关系,减少软组织剥离,固定牢靠,配合早期功能锻炼,有利于患肢功能恢复.%Objective To investigate methods and clinical effects of limited open reduction of ankle articular surface and locking compression plate (LCP) placement using minimally invasive plate osteosynthesis (MIPO) in managing tibial Pilon fractures.Methods Twenty-one patients with tibial Pilon fractures treated between August 2009 and August 2011 were involved in the study,including 16 males and 5 females,at age of 21-68 years (average 42.3 years).According to AO/OTA classification,12 patients were with type 43B fractures and nine with type 43C fractures.There were two patients with open fractures (both Gustilo-Anderson type Ⅰ fractures).Limited open reduction of ankle articular surface plus LCP placement using MIPO were performed.Early functional training without weight-bearing was carried out postoperatively.Results Nineteen patients were followed up for 12

  14. The clinical experience analysis of applying locked steel plates to treat humerus-end fracture%锁定钢板治疗肱骨近端骨折临床分析

    Institute of Scientific and Technical Information of China (English)

    张军

    2011-01-01

    目的 探讨应用肱骨近端锁定钢板治疗中老年患者肱骨近端骨折的疗效.方法 回顾性分析我院近年来收治的中老年患者的临床资料.结果 2006年4月~2010年8月使用肱骨近端锁定钢板治疗肱骨近端骨折54例,年龄45~81岁;平均54岁.骨折按Neer分型:2部分骨折15例,3部分骨折28例,4部分骨折11例,均予肱骨近端锁定钢板内固定.41例获随访,随诊6~24个月,平均14个月.均获骨性愈合,平均愈合时间4.8个月.肩关节功能按Neer疗效评分系统评定,优24例,良16例,可1例,差1例,优良率93.5%.结论 锁定加压钢板治疗中老年患者肱骨近端骨折疗效满意,是目前治疗肱骨近端骨折较理想的内固定方法.只要重视肩袖损伤的修复,术后,早期进行功能锻炼,抗骨质疏松治疗,功能恢复良好.%Objective Explore the treatment effects of applying the humerus-end fixed steel plates to treat the humerusend fracture of middle-aged and old patients. Methods Review and analyze the clinical data of the middle-aged and old patients that our hospital has received and treated in recent years. Results Apply the humerus-end fixed steel plates to treat 54 cases of the humerus-end fracture from June,2006 to August,2008,aged from 45 to 81 with an average of 54, the fracture is divided according to Neer:There are 15 cases of part 2 fracture, 28 cases of part 3 fracture, 11 cases of part 4 fracture, which are all internally fixed by the humerus-end fixed steel plates. 41 cases have gotten the follow-up treatment for 6 to 24 months with an average of 14 months. Their bones are all healed,the average curing time is 4.8 months. The shoulder joints functions are assessed according to Neer's effect grading system, among which 24 cases are excellent, 16 cases are good, 1 case is ok, 1 case is bad with the excellent-good rate of 93.5%, Conclusion The treatment effects of applying the fixed pressurization steel plates to treat the humerus

  15. 计算机仿真技术在桡骨远端骨折掌侧锁定钢板放置定位的作用研究%The Computer Simulation Technology in the Research of Fracture of the Distal Radius Volar Locking Plates Positioned Side

    Institute of Scientific and Technical Information of China (English)

    詹祖锋; 刘晓霞; 胡军; 刘有余

    2015-01-01

    目的:观察探讨计算机仿真技术在桡骨远端骨折掌侧锁定钢板的放置定位的作用。方法:选取医院2013年2月-2014年7月收纳的98例桡骨远端骨折患者,按随机分配原则分为观察组和对照组,各49例。观察组桡骨远端骨折患者,应用计算机仿真技术MIMICS软件建模,测量桡骨和掌侧钢板定位,关节面边缘与掌侧钢板螺孔中心之间最佳长度,计算掌侧锁定钢板的放置定位的标准差及均值。对照组桡骨远端骨折患者,应用传统常规X射线及CT阅片计算桡骨和掌侧钢板定位。结果:两组桡骨远端骨折患者手术情况对比,观察组透视次数、手术时间均低于对照组,有明显差异,具有统计学意义(P<0.05)。结论:计算机仿真技术在桡骨远端骨折掌侧锁定钢板的放置定位的效果显著,较常规X片检查确定等方法更为精确合适计算桡骨远端骨折关节面边缘与螺孔中心之间的最佳距离,提高骨折固定的稳定性和适应性,减少治疗后透析后检查次数及时间。其临床选择优势较高,无严重不良反应,值得临床上进一步推广应用。%Objective: To observe the effect of computer simulation technology in the research of fracture of the distal radius volar locking plates positioned side. Methods:in our hospital from 2013 February-2014 year in July received 98 cases of distal radius fracture patients, randomly divided into observation group and control group, with 49 cases in each group, were observed in patients with fracture of the distal radius, the application of computer simulation technology MIMICS software modeling, measurement of radial and palmar plate location, edge of articular surface and power. The lateral plate screw center optimal length, calculation of positioning of volar locking plates and the standard deviation of the mean. The control group of patients with fracture of the distal radius, using

  16. Clinical analysis and operation skills of locking proximal humeral plate in treating proximal humeral fractures%肱骨近端锁定接骨板治疗肱骨近端骨折的临床分析及手术技巧

    Institute of Scientific and Technical Information of China (English)

    张长青; 苏琰; 曾炳芳

    2005-01-01

    目的总结和评价应用肱骨近端锁定接骨板(locking proximal humeral plate,LPHP)治疗肱骨近端骨折的初步临床疗效和手术技巧.方法 2002年12月至2005年1月,应用AO/ASIF的LPHP治疗132例肱骨近端骨折患者,其中男性57例,女性75例;年龄18~79岁,平均58.7岁.根据Neer分类:二部分骨折74例,三部分骨折47例,四部分骨折11例.结果 132例患者随访时间为3~28个月,平均15.6个月.均达到骨性愈合,平均愈合时间为9.2周.根据Neer评分,优良率为82.31%.有2例患者LPHP固定失败.结论 LPHP具有固定稳定,血运破坏少等优点,在正确掌握手术技巧的前提下,是治疗肱骨近端骨折的较好方法.

  17. Limited open reduction and internal fixation with anterolateral L-shape locking compression plate for treatment of distal metaphyseal tibial fractures%有限切开复位结合前外侧 L 形锁定加压接骨板内固定治疗胫骨远端干骺端骨折

    Institute of Scientific and Technical Information of China (English)

    周炎; 杨越; 刘世清; 余铃; 廖琦; 赵奇; 张春; 黄涛; 张锐; 夏韶强

    2015-01-01

    目的:探讨胫骨远端干骺端骨折应用有限切开复位结合前外侧L形锁定加压接骨板( locking compression plate, LCP)内固定治疗的临床疗效。方法2011年6月~2013年1月共收治15例胫骨远端干骺端骨折患者。骨折按照国际内固定研究协会( AO/ASIF)分型:43A2型3例,43A3型10例,43B1型2例,均合并腓骨下端骨折;胫骨远端干骺端骨折线距踝关节面1.6~4.5cm,平均2.8cm;闭合性骨折8例,开放性骨折7例( GustiloⅠ型2例,Ⅱ型3例,ⅢA型2例)。 GustiloⅢA型2例急诊行清创、腓骨内固定及外固定支架固定,余患者术前行跟骨骨牵引。运用有限切开复位结合前外侧L形LCP内固定治疗,术中酌情植骨,术后早期功能锻炼。结果所有患者术后获12~18个月(平均16个月)随访,术后2例切口表皮坏死,经换药处理后愈合,余切口均一期愈合。骨折于术后16~24周(平均20周)获骨性愈合。末次随访时根据美国骨科协会足踝外科分会( American Orthopedic Foot Ankle Society,AOFAS)评分标准:评分为73~95分,平均89.5分,其中优10例,良3例,可2例,优良率86.7%。随访期间无感染、骨不连及内固定松动断裂等并发症发生。结论采用有限切开复位结合前外侧L形LCP内固定治疗胫骨远端干骺端骨折,术中利用微创置板技术,并酌情植骨,术后早期功能锻炼,可获得良好疗效。%Objective To investigate the clinical effects of limited open reduction and internal fixation with anterolateral L-shape locking compression plate for treatment of distal metaphyseal tibial fractures.Methods Fifteen patients with distal metaphyseal tibial fractures were treated in our department between Jun.2011 and Jan.2013.According to AO/ASIF classification,3 patients were with Type 43A2 fracture,10 patients with Type 43A3 fracture, 2 patients with Type 43B1 fracture and all were combined

  18. Far cortical locking screws in distal femur fractures.

    Science.gov (United States)

    Adams, John D; Tanner, Stephanie L; Jeray, Kyle J

    2015-03-01

    Distal femur fractures routinely heal by secondary bone healing, which relies on interfragmentary motion. Periarticular locking plates are commonly used for fixation in distal femur fractures but are associated with a high nonunion rate, likely due to the stiffness of the constructs. Far cortical locking (FCL) screws are designed to allow micromotion at the near cortex while maintaining purchase in only the far cortex. Although clinical data are limited, these screws have been shown in biomechanical studies to provide excellent interfragmentary motion, and animal models have shown increased callus formation compared with traditional locking screws. The purpose of this study was to examine the clinical effects that FCL screws have on healing in distal femur fractures treated with locked constructs. In this retrospective case series, 15 patients with a distal femur fracture treated with MotionLoc screws (Zimmer, Warsaw, Indiana) were analyzed. Serial radiographs were evaluated for callus presence and time to union. All fractures were either 33-A3 or 33-C2 according to the AO classification system, and 5 (33%) were open. Bone loss was recorded in 2 patients. There were no nonunions, and average time to union was 24 weeks. There were no implant failures, and all 5 open fractures, including the 2 with bone loss, healed without intervention. There was 1 reoperation due to painful hardware. Although this is a small case series, these results are promising. Far cortical locking screws may provide the answer to the high nonunion rate associated with distal femur fractures treated with traditional locked constructs.

  19. 不同构造措施的钢管混凝土边框钢板剪力墙抗震性能试验研究%Experimental Study on Seismic Performance of Steel-plate Shear Walls with Concrete Filled Steel Tube Columns and Different Constructional Measures

    Institute of Scientific and Technical Information of China (English)

    张建伟; 曹万林; 董宏英; 李刚; 张文江

    2011-01-01

    The steel-plate shear wall with concrete filled steel tube columns is a new type of composite shear wall. In order to assess the seismic performance of new shear walls with different constructional measures, experimental study of three specimens with the same shear span ratio 1-5 were carried out undercyclic loading: one with the steel plate and the steel tubes being connected by welding, one with the steel plate and the steel tubes being connected by bolts, and one with the steel plate and the steel tubes being connected by welding as well as with low opening ratio of holes in the steel plate. Based on the experiment , the damage characteristics, hysteretic behavior, load-carrying capacity, stiffness, ductility and energy dissipation of the specimens were contrastively analyzed. The experimental results showed that the connection type between the steel plate and the steel tubes, either in welding or in bolting, had little effect on the overall performance of the shear walls. Compare to the normal steel-plate shear walls with concrete filled steel tube columns, the load-carrying capacity, ductility, stiffness and energy dissipation of the perforated steel-plate shear walls with concrete filled steel tube columns had not obvious change under low opening ratio of holes.%钢管混凝土边框钢板剪力墙是一种新型抗震剪力墙,为了比较不同构造措施对该新型剪力墙抗震性能的影响,进行了3个剪跨比为1.5的钢管混凝土边框钢板剪力墙低周反复荷载试验.其中,试验模型1为墙体钢板与边框柱钢管焊接,试验模型2为墙体钢板与边框柱钢管螺栓连接,试验模型3为墙体钢板开孔并与边框柱钢管焊接.通过试验研究,比较了各剪力墙的破坏特征、滞回特性、承载力、刚度、延性以及耗能能力.结果表明:在墙体钢板与边框柱钢管的连接方式中,采用焊接或栓接对剪力墙的整体性能影响不大;与普通钢管混凝土边框钢板剪力墙相

  20. PHILOS humerus plate for a distal tibial fracture.

    Science.gov (United States)

    Twaij, Haider; Damany, Dev

    2013-01-04

    This report discusses the use of an alternative implant in the emergency fixation of a distal tibial fracture. We planned to fix the shear-type medial malleolar fracture in a closed, tri-malleolar fracture with a locking distal tibial plate. Intra-operatively, it was noted that the required plate was unavailable. A PHILOS humeral plate seemed to fit the contours of the distal tibia. The broad end of the PHILOS, when placed distally, gave options to place locking screws in the medial malleolar fragment. The fracture was stable after fixation. The patient made a full post-operative recovery and follow-up at 4 months was satisfactory. Despite adequate planning, there will be instances where one has to improvise. An understanding of the principles of fracture management can aid in finding solutions. PHILOS humeral plate may be used to stabilize a distal tibial fracture if an appropriate distal tibial locking plate is not available.

  1. ANALYSIS OF BEARING CAPACITY OF DOUBLE COLD-FORMED THIN-WALLED C STEEL BACK-TO-BACK COMPOSITE COLUMN WITH PLATE COUPLED%带垫板的双肢背靠背C型钢组合柱承载力分析

    Institute of Scientific and Technical Information of China (English)

    陈明; 芦文文; 刘凯

    2014-01-01

    According to the composite column of double cold-formed thin-walled C steel back to back connected with gusset plate, the test and finite element analysis were carried out to study the stability bearing capacity and failure modes of the specimen under eccentric loading.The elements such as slenderness ratio, gusset plate thickness and gusset plate spacing were discussed , which produced the impacts to composite column ’ s bearing capacity, the relationship between stiffness and axial loading, and the curves of M-φof eccentricity.The results revealed that before the overall instability the local-buckling was occurred, the failure modes were belonging to the in-plane-flexural buckling.The major factors are slenderness ratio, eccentricity and gusset plate spacing which effected the mechanical behavior, while the gusset plate thickness has no obvious impact.In the end, the calculation method of the bearing capacity of the cold-formed thin-walled column was compared with that in“Technical Code of Cold-Formed Thin-Walled Section Steel Structures” ( GB 50018-2002 ) , some suggestions based on the type of composite section column calculation were put forward , and the bearing capacity correction coefficient of the steel composite columns was given .%针对带垫板的双肢背靠背C型钢组合柱,通过试验和有限元模拟分析,研究该类型组合柱在偏心荷载作用下的受力特性,就偏心距、长细比、垫板厚度和间距等参数对组合柱承载力、刚度与轴向荷载的关系和M-φ曲线的影响进行讨论。结果表明:C型钢腹板和受压翼缘在整体失稳之前出现了严重的局部屈曲,组合柱的破坏模式均为弯矩作用平面内的弯曲失稳。长细比、偏心距和垫板间距是影响组合柱受力性能的主要因素,垫板厚度的影响有限。最后与规范GB 50018-2002《冷弯薄壁型钢结构技术规范》规定的柱承载力的计算方法进行对比,对该类组合柱的

  2. Finite element analysis of distal femoral locking plate and minimally invasive internal fixation system in different motion states%股骨远端锁定微创内固定系统不同运动状态下的有限元分析

    Institute of Scientific and Technical Information of China (English)

    郝廷; 王兴国; 李筱贺

    2016-01-01

    BACKGROUND:Traditional distal femoral fixation plate screw breakage is relatively common. Designing good anatomical and attached fixation system is the key for clinical application. OBJECTIVE:To perform finite element analysis in two states of motion of the minimal y invasive distal femoral fixation system, compare stress distribution of different parts in the same fixed way, different fixed methods and the same fixed parts of different motion states. METHODS:Imaging data of a 34-year-old male patient weighing 68 kg with 33-C1 type fracture of distal femur were selected. CT data were input into Mimics 16.0 for reconstruction. PRO-E software was used to establish minimal y invasive internal fixation system with distal femoral locking plate. Data were introduced into reconstructed models of distal femur fracture in Mimics for grid division. Data were introduced into Ansys products 11.0 to construct finite element model, fix the surface of distal femur, and loaded 340 N on greater trochanter of femur. Stress distribution of each plate, screw hole and screw tail was analyzed in each group. Stress at the same region was compared in flexion and extension movement states. RESULTS AND CONCLUSION:(1) Finite element models of anatomic locking plate for distal femur fracture fixation were successful y established, total y 43 536 units, 41 256 nodes. (2) With the steel segment gradual y down (S1-S5), the stress gradual y increased. A1-A5 with the increase in the number of screws, the stress gradual y increased, but A6 suddenly decreased. (3) According to the cloud atlas of stress, these were wel distributed except A1. From distal end to extremity of screw, the stress of screws increased. Among corresponding segments, significant differences in stress around the nail holes and steel segment stress were detected. Moreover, the steel stress was greater than the stress of corresponding segment of screw hole. (4) Results suggest that using anatomical locking plate and minimal y

  3. Osteossíntese das fraturas da extremidade proximal do úmero com sistema de placa de ângulo fixo com parafusos bloqueados: técnica e resultados Osteosynthesis of proximal humeral end fractures with fixed angle plate and locking screws: technique and results

    Directory of Open Access Journals (Sweden)

    Marcio Cohen

    2009-04-01

    Full Text Available OBJETIVO: Descrever os resultados do tratamento cirúrgico das fraturas da extremidade proximal do úmero com a placa de sistema bloqueado Philos. MÉTODOS: Entre março de 2003 e outubro de 2004 foram avaliados, de forma prospectiva, 24 de 26 pacientes com fratura da extremidade proximal do úmero tratados com a placa Philos. A média de seguimento foi de 12 meses e da idade dos pacientes, de 57 anos. Seis pacientes tinham fraturas em quatro partes, 11 em três partes e nove em duas partes. A avaliação clínica foi feita por meio dos critérios da University of California at Los Angeles (UCLA. RESULTADOS: A média do escore da UCLA foi de 30 pontos (17-35. Todas as fraturas consolidaram. Em três pacientes a fratura consolidou em varo. Nesses, o índice da UCLA médio foi de 27 pontos. CONCLUSÃO: A osteossíntese com a placa Philos permite fixação estável com bom resultado funcional.OBJECTIVE: Describe the results of proximal humeral fractures surgically treated with the Philos locking plate system. METHOD: Between March 2003 and October 2004 we prospectively reviewed 24 of 26 patients with proximal humerus fractures treated with a Philos plate. The mean follow-up time was 12 months and the mean age of patients was 57 years. Six patients had four-part proximal humerus fractures, 11 patients had three-part proximal humerus fractures, and nine patients had two-part proximal humerus fractures. Clinical evaluation was performed using the University of California at Los Angeles (UCLA criteria. RESULTS: The mean UCLA score was 30 points (17-34. All fractures showed union. Three patients showed fracture union at varus position. The mean UCLA score for these patients was 27 points. CONCLUSION: Osteosynthesis with Philos plate provides a stable fixation method with good functional outcome.

  4. Locked-in syndrome.

    Science.gov (United States)

    Sepcić, J; Sepić-Grahovac, D; Strenja-Grubesić, J; Antonelli, L; Andrasević, D

    1992-01-01

    A patient, young fisherman, with a locked-in syndrome is reported, in whom intact consciousness, quadriplegia of spastic type, voluntary eye blinking, (de)sursumvergence and anarthria were observed. Thrombosis of the basilar artery and slightly disturbed bioelectrogenesis of the cerebral cortex were proved by clinical examination. The patient died after 41 days. At the autopsy thrombosis a. basilaris and ventrobasal pontine infarction were confirmed. Differential diagnosis of this and similar syndromes has been discussed.

  5. Avoiding lock-in

    DEFF Research Database (Denmark)

    Henriksen, Ingrid

    1999-01-01

    The paper investigates the initial phase of the cooperative organisation of agricultural processing firms in Denmark. It argues that the variations observed can be explained within the framework of the theory of industrial organisation. The focus is on the success of cooperative creameries. In 19...... of gathering information and of preserving and transporting a perishable product, were ideally suited to overcome the problems of potential lock-in and of asymmetric information...

  6. Data port security lock

    Science.gov (United States)

    Quinby, Joseph D.; Hall, Clarence S.

    2008-06-24

    In a security apparatus for securing an electrical connector, a plug may be fitted for insertion into a connector receptacle compliant with a connector standard. The plug has at least one aperture adapted to engage at least one latch in the connector receptacle. An engagement member is adapted to partially extend through at least one aperture and lock to at least one structure within the connector receptacle.

  7. Automated Composite Column Wrapping

    OpenAIRE

    ECT Team, Purdue

    2007-01-01

    The Automated Composite Column Wrapping is performed by a patented machine known as Robo-Wrapper. Currently there are three versions of the machine available for bridge retrofit work depending on the size of the columns being wrapped. Composite column retrofit jacket systems can be structurally just as effective as conventional steel jacketing in improving the seismic response characteristics of substandard reinforced concrete columns.

  8. A new assembly of locking compression plate for treatment of comminuted femoral fracture: a three-dimensional finite element analysis%新型组合式锁定加压钢板不同滑槽钢板方案治疗股骨粉碎性骨折的三维有限元分析

    Institute of Scientific and Technical Information of China (English)

    周江军; 易蕊; 赵敏; 肖春林; 刘达; 吕仁发; 杨俊; 付美清; 史柏娜

    2015-01-01

    目的 通过有限元分析方法观察3种不同滑槽方案的新型组合式锁定加压钢板固定股骨粉碎性骨折的应力分布情况. 方法 采用64排螺旋CT对1名健康成年男性志愿者的股骨进行扫描(层厚为0.625 mm),获得股骨CT数据,通过Mimics10.0、Geomagic Studio 12.0等逆向工程软件获得股骨有限元模型,模拟股骨中段粉碎性骨折,分别采用A、B、C方案钢板模拟手术固定,A方案:滑槽钢板与主钢板以“微弧面”接触,B方案:滑槽钢板以内侧卡槽与主钢板接触,C方案:滑槽钢板以中间卡槽与主钢板接触.加以缓慢行走单侧股骨载荷及扭转载荷,分析3种不同固定方案钢板及股骨的应力分布情况. 结果 在缓慢行走载荷及扭转载荷下,3种固定方案钢板应力分布变化趋势均匀,骨折断端周围为应力集中区域,主钢板最大应力集中点均位于钢板近端第5钉孔外侧缘,A方案主钢板最大应力均最小(529.20、617.20 MPa);C方案滑槽钢板最大应力均最小(372.10、814.70 MPa),A方案次之(938.80、1059.00 MPa).A方案骨折块最大应力及最大位移均最小(缓慢行走载荷下分别为28.68 MPa、2.411 mm,扭转载荷下分别为34.52 MPa、3.209 mm). 结论 滑槽钢板与主钢板以“微弧面”接触方案既能为股骨干粉碎性骨折提供坚强的力学稳定性,又能减小钢板应力集中,较其他2种方案更方便固定骨碎块,有利于骨愈合.%Objective To explore the stress distributions on a new assembly of locking compression plate (NALCP) in 3 schemes of sliding plate by finite element analysis (FEA) in the treatment of comminuted femoral fracture.Methods A male volunteer received CT scanning with a slice thickness of 0.625 mm.The CT data were converted to FEA models of comminuted femoral fracture by software Mimics 10.0 and Geomagic Studio 12.0.The femoral fracture was fixated by NALCP in 3 schemes of sliding plate respectively.The sliding plate contacted the

  9. "Dry-column" chromatography of plant pigments

    Science.gov (United States)

    Woeller, F. H.; Lehwalt, M. F.; Oyama, V. I.

    1973-01-01

    Separation of plant pigments which can be accomplished on thin-layer silica plates with mixture of petroleum ether, halocarbon, acetone, and polar solvent can be readily translated into dry-column technique that yields reproducible chromatograms after elution in fashion of liquid chromatography with fluorimeter as detector. Best solvent system was found to be mixture of petroleum ether, dichloromethane, acetone, and ethyl acetate.

  10. 49 CFR 236.338 - Mechanical locking required in accordance with locking sheet and dog chart.

    Science.gov (United States)

    2010-10-01

    ... locking sheet and dog chart. 236.338 Section 236.338 Transportation Other Regulations Relating to... in accordance with locking sheet and dog chart. Mechanical locking shall be in accordance with locking sheet and dog chart currently in effect....

  11. 抗生素骨水泥被覆锁定钢板在膜诱导技术治疗胫骨创伤后骨感染中的运用%Application of antibiotic cement-coated locking plates in induced membrane technique for treating post-traumatic tibial osteomyelitis

    Institute of Scientific and Technical Information of China (English)

    余鑫; 贾硕; 吴宏日; 喻胜鹏; 谢肇

    2017-01-01

    Objective To investigate the clinical outcome of post-traumatic tibial osteomyelitis treated by induced membrane technique combined with the antibiotic cement-coated locking plate.Methods A restrospective case series analysis was made on 71 cases of post-traumatic tibial osteomyelitis treated by induced membrane technique from September 2014 to September 2014.There were 55 males and 16 females, aged 18-60 years(mean, 37.4 years).Mean length of bone defect following debridement was 4.5 cm(range, 4-11 cm).Antibiotic cement-coated locking plates were used to provide the stability of the bone defects after one-stage debridement.Bone grafting and exchanging the plates with ntramedullary nails were done during the second-stage surgery.Parameters were monitored dynamically after operation to evaluate infection recurrence and bone healing, including C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), clinical features(sinus formation, redness and swelling, warmth and pain) and X-ray films of the involved limbs.Results All patients were followed up for 13-25 months (mean, 19.5 months).There was no sign of recurring infection and CRP and ESR were normal in all cases after the first stage surgery.However, four cases (6%) had recurrent infection with sinus exudates and their CRP and ESR were abnormal after the second stage surgery, and further treatments were carried out on these patients.Follow-up showed bony union in all patients within mean 5.5 months (range, 4-6 months).Conclusion Induced membrane technique with antibiotic cement-coated locking plates for treatment of post-traumatic tibial osteomyelitis can shorten bone healing time and decrease infection recurrent rate without obvious impact on osteogenic activity.%目的 探讨在膜诱导技术治疗胫骨创伤后骨感染中使用抗生素骨水泥被覆锁定钢板的临床疗效. 方法 采用回顾性病例系列研究分析2014年9月-2015年9月运用膜诱导技术治疗的

  12. 经前路椎体次全切钛笼置入锁定钢板螺丝钉内固定治疗相邻两节段脊髓型颈椎病%Adjacent Two Segments Anterior Subtotal Titanium Cage into the ;Locking Plate Screw Fixation for the Treatment of Cervical Spondylotic Myelopathy

    Institute of Scientific and Technical Information of China (English)

    青祖宏; 刘明; 高巍; 何蔚; 刘杨; 李永焕

    2013-01-01

    Objective To summarize the clinical efficacy of the anterior corpectomy cut with titanium cage and locking plate screw fixation for the treatment of two adjacent cervical spondylotic myelopathy.Method August 2010~December 2012,Anterior corpectomy cut with titanium cage and locking plate screw fixation for the treatment of adjacent two segments cervical spondylotic myelopathy 25 cases,including 18 men and 7 women patients,aged 33~75 years,mean 56.5 years.In 25 patients with varying degrees of symptoms of spinal cord compression. There are 9 cases(C4/C5). There are 15 cases(C5/C6).There are 1 case(C6/C7).Observed lateral cervical spine,cervical hyperextension flexion X-rays and cervical MR, before and after surg ery and follow-up phase,so as to learn spinal cord compression,cervical stability and postoperative cervical height,curvature,titanium cage plate screw position and cervical fusion. Compared preoperative to postoperative and follow-up,pain visual analog scale (VAS) and the Japan Orthopaedics Association (JOA) pain score.Results Operative time (120±30) min,blood loss (150±50)ml.The surgery does not appear related complications.The followed up time are 2~24 months (mean 12.5 months). Nerve function significantly improved.JOA score increased from preoperative 6.2±1.1 to the last follow-up 14.3±1.5,with an average improvement rate was (82.3±11.4)%.VAS average score is 2.1 points.The follow-up period is not found that the titanium cage shift,loose screws and lesion spinal cord compression phenomenon.Conclusion Anterior corpectomy cut with titanium cage and locking plate screw fixation for the treatment of two adjacent segments of cervical spondylotic myelopathy,effectively relieve nerve compression of the spinal cord,quickly restored cervical curvature and height,reconstruction of spinal stability,shorter operative time,less bleeding, and less damage.It has created favorable conditions for the rehabilitation of neurological function in patients,which is an

  13. Ceramic Plate Solar Collector and Column Pile Structure Ceramic Solar Roof%陶瓷太阳板与锚桩结构陶瓷太阳能房顶的应用

    Institute of Scientific and Technical Information of China (English)

    孙启正; 许建华

    2012-01-01

    陶瓷太阳板以普通瓷土、工业废弃物为原料,具有制造工艺简单、生产耗能少、成本低、寿命长、效率高的优点;锚桩陶瓷太阳能房顶与原房顶共用结构层、保温层、防水层,结构简单、与建筑一体化、与建筑同寿命,为建筑物提供热水、取暖、空调的功能。%Ceramic plate solar collector, manufactured by common porcelain clay and industrial waste,has a lot of advantages such as simple process,low energy consumption,low cost,long life, high efficiency etc. Ceramic plate solar collector roof share the structure layer,insulation layer and waterproof layer with the origin roof. The roof has a simple structure, integration and same life with the building. Ceramic plate solar collector roof can supply hot water, heating and air condition to the building.

  14. Innovation and Lock-in

    DEFF Research Database (Denmark)

    Cantner, Uwe; Vannuccini, Simone

    2016-01-01

    , especially when innovation is concerned. Also, we address the question if lock-in is a well-defined concept at all. To offer a fresh view on lock-in and to tackle the issues just raised, we employ the replicator dynamics model. By making a parallel between monopolization in the replicator dynamics...... and the occurrence of lock-ins, we show that the convergence of a system to a given outcome can be reversed, under certain conditions. We highlight the need for a more precise demarcation of the conceptual boundaries of lock-in and path dependence, both from the formal and the empirical side, and suggest...

  15. Circulation in gas-slurry column reactors

    Energy Technology Data Exchange (ETDEWEB)

    Clark, N.; Kuhlman, J.; Celik, I.; Gross, R.; Nebiolo, E.; Wang, Yi-Zun.

    1990-08-15

    Circulation in bubble columns, such as those used in fischer-tropsch synthesis, detracts from their performance in that gas is carried on average more rapidly through the column, and the residence time distribution of the gas in the column is widened. Both of these factors influence mass-transfer operations in bubble columns. Circulation prediction and measurement has been undertaken using probes, one-dimensional models, laser Doppler velocimetry, and numerical modeling. Local void fraction was measured using resistance probes and a newly developed approach to determining air/water threshold voltage for the probe. A tall column of eight inch diameter was constructed of Plexiglas and the distributor plate was manufactured to distribute air evenly through the base of the column. Data were gathered throughout the volume at three different gas throughputs. Bubble velocities proved difficult to measure using twin probes with cross-correlation because of radial bubble movement. A series of three-dimensional mean and RMS bubble and liquid velocity measurements were also obtained for a turbulent flow in a laboratory model of a bubble column. These measurements have been made using a three-component laser Doppler velocimeter (LDV), to determine velocity distributions non-intrusively. Finally, the gas-liquid flow inside a vertically situated circular isothermal column reactor was simulated numerically. 74 refs., 170 figs., 5 tabs.

  16. Surgery Locking Compression Plate Fixation for the Treatment of Long Bone Comminuted Fracture of the Limbs%锁定加压钢板内固定手术对四肢长骨粉碎性骨折的治疗价值

    Institute of Scientific and Technical Information of China (English)

    封小东

    2016-01-01

    Objective Application in patients with limb long bone comminuted fracture internal fixation with locking compression plate (LCP) analysis, this paper discusses the clinical effect of surgical treatment. Methods In our hospital in 2014-2015 were a total of 60 patients with limbs long bone comminuted fracture as a clinical research data, the patients were randomly divided into two groups: treatment group and control group, 30 cases of patients in each group. The control group used the traditional plaster external fixation + manual reduction treatment, treatment group application of LCP internal fixation surgery reset, compare two methods of surgical treatment effect. Results After treatment, the treatment group was significantly higher than the control group, after statistics, a significant statistical significance (P<0.05). Follow-up survey was performed after the surgery, two groups of anatomical repositioning effect is good, none of the patients with complications. Treatment group patients average healing time was significantly shorter than the control group the average healing time of, the statistics, a significant statistical significance (P<0.05). Conclusion Limbs long bone comminuted fracture surgery treatment, application of locking compression plate fixation can achieve significant treatment effect, worthy of popularization and application in clinic.%目的:对四肢长骨粉碎性骨折患者应用锁定加压钢板(LCP)内固定手术治疗的临床效果进行分析探讨。方法将本院在2014-2015年收治的四肢长骨粉碎性骨折患者共计60例作为临床研究资料,将患者随机分为两组:治疗组与对照组,每组患者有30例。对照组应用传统的石膏外固定+手法复位治疗,治疗组应用 LCP 内固定手术复位,比较两种手术方法的治疗效果。结果经过治疗后,治疗组的优良率显著高于对照组,经统计,有显著的统计学意义(P<0.05)。手术后对患者进行

  17. Locked nucleic acid

    DEFF Research Database (Denmark)

    Jepsen, Jan Stenvang; Sørensen, Mads D; Wengel, Jesper

    2004-01-01

    Locked nucleic acid (LNA) is a class of nucleic acid analogs possessing very high affinity and excellent specificity toward complementary DNA and RNA, and LNA oligonucleotides have been applied as antisense molecules both in vitro and in vivo. In this review, we briefly describe the basic...... physiochemical properties of LNA and some of the difficulties that may be encountered when applying LNA technology. The central part of the review focuses on the use of LNA molecules in regulation of gene expression, including delivery to cells, stability, unspecific effects, toxicity, pharmacokinetics...

  18. Analysis on the Clinical Efficacy of Locking Proximal Humeral Plate in Treatment of Senile Proximal Humerus Fractures%肱骨近端锁定钢板治疗老年肱骨近端骨折的临床疗效分析

    Institute of Scientific and Technical Information of China (English)

    邓训训; 黄桂芬; 陈华明

    2016-01-01

    目的:探讨肱骨近端锁定钢板治疗老年肱骨近端骨折的临床效果。方法选取2009年1月至2015年12月我院收治的老年肱骨近端骨折患者92例患者作为研究对象,按照入院顺序将其分为观察组和对照组,每组各46例。对照组采用常规的钢板手术进行治疗,观察组采用肱骨近端钢板锁定治疗。比较两组的临床治疗效果、 Neer功能评分、手术时长、术中出血量以及骨折愈合时间。结果两组患者的手术时长无明显差异(P>0.05),观察组患者的手术出血量、骨折愈合时间均显著少于对照组(P0.05); the intraoperative bleeding volume, healing time of fracture in observation group were significantly less than those in control group (P<0.05). The each items scores and total scores of Neer in observation group were significantly better than those in control group (P<0.05). The total effective rate of observation group was 91.3%, significantly higher than 71.7% of control group (P <0.05). Conclusions Locking proximal humeral plate in treatment of senile proximal humerus fractures can significantly improve the treatment effects, and optimize the clinical related indicators, which is worthy of promotion and application.

  19. 薄壁钢板组合PEC柱(强轴)滞回性能试验研究%Hysteretic behavior of PEC columns (strong axis) with thin steel plate composite section

    Institute of Scientific and Technical Information of China (English)

    方有珍; 陆佳; 马吉; 孙国华

    2012-01-01

    目前我国规范关于PEC组合柱构件及由此组成的结构体系方面的有关内容还基本空白,通过了解国际上在PEC组合柱研究领域的现状,对3个变化混凝土强度等级和拉结筋间距的薄壁钢板组合截面PEC柱足尺试件在恒定轴压下进行水平循环荷载的滞回性能试验。观测记录各个试件加载阶段的薄壁钢板组合截面翼缘的局部屈曲和混凝土裂缝开裂与压溃现象,得到构件的荷载-位移滞回曲线。根据试验结果分析构件的承载力、抗侧刚度、构件的抗震延性和破坏模式等力学性能。结果表明:试验试件具有较好的变形能力和耗散地震能的双重功效;构件的破坏模式为薄壁钢板组合截面翼缘发生局部屈曲,随之柱脚部位混凝土压溃和拉结筋屈服甚至拉断。研究进一步丰富了PEC柱研究成果,为PEC组合柱组成的结构体系规范制订和工程应用提供了合理的理论依据。%According to the development in the field of partially encased composite columns (PEC) and the demand for modification of the relevant structural specification, PEC columns fabricated with thin-wall composite section were investigated. 3 specimens with various concrete strength and transverse link spacing were manufactured to represent the middle-storey column of a PEC column-steel beam composite frame structure. The test of the specimens were conducted under lateral cyclic loading along the strong axis with constant axial compression, and the hysteretic curves were obtained. Base on the test results, the global responses were analyzed, including the load-carrying capacity, lateral- resistant stiffness, energy-dissipation capacity, the ductility property and the failure mode. The specimens exhibited sound ductility and energy-dissipation capacity; the failure mode was primarily local buckling in the flange of a thin-wall composite section, crushing and spalling of concrete at the comer

  20. Modeling Stone Columns

    Directory of Open Access Journals (Sweden)

    Jorge Castro

    2017-07-01

    Full Text Available This paper reviews the main modeling techniques for stone columns, both ordinary stone columns and geosynthetic-encased stone columns. The paper tries to encompass the more recent advances and recommendations in the topic. Regarding the geometrical model, the main options are the “unit cell”, longitudinal gravel trenches in plane strain conditions, cylindrical rings of gravel in axial symmetry conditions, equivalent homogeneous soil with improved properties and three-dimensional models, either a full three-dimensional model or just a three-dimensional row or slice of columns. Some guidelines for obtaining these simplified geometrical models are provided and the particular case of groups of columns under footings is also analyzed. For the latter case, there is a column critical length that is around twice the footing width for non-encased columns in a homogeneous soft soil. In the literature, the column critical length is sometimes given as a function of the column length, which leads to some disparities in its value. Here it is shown that the column critical length mainly depends on the footing dimensions. Some other features related with column modeling are also briefly presented, such as the influence of column installation. Finally, some guidance and recommendations are provided on parameter selection for the study of stone columns.

  1. Modeling Stone Columns

    Science.gov (United States)

    2017-01-01

    This paper reviews the main modeling techniques for stone columns, both ordinary stone columns and geosynthetic-encased stone columns. The paper tries to encompass the more recent advances and recommendations in the topic. Regarding the geometrical model, the main options are the “unit cell”, longitudinal gravel trenches in plane strain conditions, cylindrical rings of gravel in axial symmetry conditions, equivalent homogeneous soil with improved properties and three-dimensional models, either a full three-dimensional model or just a three-dimensional row or slice of columns. Some guidelines for obtaining these simplified geometrical models are provided and the particular case of groups of columns under footings is also analyzed. For the latter case, there is a column critical length that is around twice the footing width for non-encased columns in a homogeneous soft soil. In the literature, the column critical length is sometimes given as a function of the column length, which leads to some disparities in its value. Here it is shown that the column critical length mainly depends on the footing dimensions. Some other features related with column modeling are also briefly presented, such as the influence of column installation. Finally, some guidance and recommendations are provided on parameter selection for the study of stone columns. PMID:28773146

  2. 锁定钢板内固定联合抗骨质疏松药物治疗老年肱骨近端骨折的临床效果观察%Efficacy of locking plate fixation with anti-osteoporosis drug treatment of older patients with proximal humeral fractures

    Institute of Scientific and Technical Information of China (English)

    宋建军; 赵春斌; 平少华

    2015-01-01

    Objective To investigate the effect of the locking plate fixation with anti-osteoporosis drug in the treatment of older patients with proximal humeral fractures. Methods Sixty-two patients with proximal humeral fractures who were treated in Yuzhou Mining Company Hospital of Kailuan Group of Hebei Province from Feb. 2011 to Oct. 2013 were divided into observation group(n=30)and control group(n=32). Patients in both groups were given locking plate fixation,and patients in the observer group were also received anti-osteoporosis treatment. The information including hospitalization periods,efficacy and bone mineral density of the two groups was recorded. Results The hospitalization periods of the observation group and control group were (6. 9 ± 1. 0)d,(9. 5 ± 1. 1)d,and the difference was statistically significant(t=8. 426,P﹤0. 05). The efficacy in observer group was excellent in 17 cases,good in 10 cases,fair in 2 cases and poor in 1 case,and the efficacy of the control group was excellent in 14 cases,good in 10 cases,fair in 5 cases and poor in 3 cases. The difference was statistically significant(χ2 =4. 617,P ﹤0. 05 ). After the anti-osteoporosis treatment,the bone mineral density of the observer group and control group were( 0. 79 ± 0. 13)g/cm2 and(0. 66 ± 0. 05)g/cm, the difference was statistically significant( t =10. 251,P ﹤0. 05 ). Conclusion The effect of locking plate fixation with anti-osteoporosis drug is better with shorter hospital stay,safe and reliable,and it is worthy of clinical application.%目的:探讨锁定钢板内固定联合抗骨质疏松药物治疗老年肱骨近端骨折的效果。方法将我院2011年2月至2013年10月收治的62例老年肱骨近端骨折患者随机分为观察组30例和对照组32例。两组均给予锁定钢板内固定治疗,观察组术后给予抗骨质疏松治疗。观察并比较两组患者的住院时间、治疗效果及骨密度。结果观察组和对照组住院时间分别为(6.9±1

  3. Anterior cervical Cage-assisted fusion combined with locking titanium plate internal fixation for the treatment of extension-type cervical fracture%颈前路Cage融合锁定钛板置入内固定治疗伸直型颈椎骨折

    Institute of Scientific and Technical Information of China (English)

    吴剑; 刘艳西; 秦星星; 郑勇; 石振; 鲍同柱

    2013-01-01

    BACKGROUND:There is no literature about the treatment according to the mechanism of cervical spine injury classification, especial y for the treatment of extension type cervical fracture/dislocation with merger cases of posterior composite structure damage, whether simple anterior approach can meet the needs of the treatment has no detailed elaboration. This article may analyze from the aspect of cervical spine injury mechanism. OBJECTIVE:To observe the short-term effect of anterior cervical Cage-assisted fusion combined with locking titanium plate internal fixation for the treatment of extension type cervical fracture. METHODS:A retrospective analysis was performed in 15 extension type cervical spine fracture dislocation patients treated with decompression anterior cervical intervertebral disc resection plus bone graft with cage-fusion locking titanium plate internal fixation from June 2006 to March 2011 in the Department of Orthopedics, Xianning Central Hospital, including 10 cases of single segment injury and treatment, and five cases of multiple segment injury and treatment. Japanese Orthopaedic Association score and the neck disability index were compared before and after treatment;the cervical flexion and height were measured according to the antersposterior X-ray film taken before fixation, 1 week after fixation and final fol ow-up.RESULTS AND CONCLUSION:The patients were fol owed-up for 8-37 months. One case had Cage mild sinking and shift, and there was no internal fixation breakage or loosening in al the patients. Transient pharyngeal discomfort was observed in 11 patients. Compared with the preoperation, the Japanese Orthopaedic Association score, neck dysfunction index, fusion segment cervical flexion and fusion segment intervertebral disc height were significantly improved at 1 week after fixation and final fol ow-up (P0.05). The short-term effect of decompression anterior cervical intervertebral disc resection plus bone graft with cage-fusion locking

  4. 解剖型桡骨掌侧锁定接骨板固定术治疗不稳定性桡骨远端骨折的疗效%Curative efficacy of unstable distal radius fracture treated by anatomic volar locking plate

    Institute of Scientific and Technical Information of China (English)

    纪斌; 曹成福; 成翔宇; 唐桐生; 樊海峰; 庞金辉

    2013-01-01

    目的 探讨解剖型桡骨掌侧锁定接骨板固定术治疗不稳定性桡骨远端骨折的疗效.方法 2010年7月-2012年6月,上海中医院大学附属普陀医院共收治67例不稳定性桡骨远端骨折患者,根据Müller AO分型,A3型11例、B2型4例、B3型2例、C1型15例、C2型23例、C3型12例.所有患者均采用切开复位后行解剖型桡骨掌侧锁定接骨板内固定术,术后定期随访.术后6个月采用Stewart改良的Sarmiento系统和Dienst标准对骨折复位情况和患腕关节功能进行评估.结果 所有患者均获随访,随访时间6~18个月,平均随访时间为(12.6±3.2)个月.X线片显示所有骨折均愈合,平均愈合时间为(8.7±2.4)周.术后6个月,经X线片测量桡骨茎突高度为(10.3±2.1) mm、掌倾角为(8.5±4.2)°、尺偏角为(21.1±4.9)°,均基本恢复正常;采用Stewart改良的Sarmiento系统评估显示复位优良率为95.5%(64/67),采用Dienst标准评估患侧腕关节功能的优良率为92.5%(62/67).结论 采用切开复位后行解剖型桡骨掌侧锁定接骨板内固定术治疗不稳定性桡骨远端骨折可获得较理想的疗效.%Objective To evaluate the radiologic and functional outcomes of internal fixation for unstable distal radius fractures with anatomic volar locking plate.Methods From July 2010 to June 2012,67 patients underwent open reduction and internal fixation with anatomic volar locking plate.These comminuted distal radius fractures included 11 type A3,4 type B2,2 type B3,15 type C1,23 type C2,and 12 type C3,according to the AO/ASIF classification.Fracture reduction and wrist joint function were assessed by Sarmiento criteria modified by Stewart and Dienst scale at 6 months after operation.Results All patients were followed up for (12.6 ±3.2) months (range,6-18 months).X-ray showed that all fractures were healed after (8.7 ± 2.4) weeks.The average height of radial malleolus was (10.3 ± 2.1) mm,the volar inclined angel was (8.5± 4.2)

  5. 解剖型锁定钢板固定治疗累及股骨干的转子间或转子下骨折%Treating femoral intertrochanteric and subtrochanteric fractures combined with femoral shaft fractures using anatomic locking plate

    Institute of Scientific and Technical Information of China (English)

    王少林; 谭祖键; 周明全; 吴钢; 张胜利; 龙祥明

    2012-01-01

    Objective To evaluate clinical efficacy of treating femoral intertrochanteric and subtrochanteric fractures combined with femoral shaft fractures using anatomic locking plate.Methods From January 2009 to June 2011,we treated 72 cases of femoral intertrochanteric and subtrochanteric fractures combined with femoral shaft fractures using anatomic locking plate.Sixty-four cases were followed up.There were 50 males and 14 female,with an average age of 42.8 years (range,21-79).All patients suffered from closed femoral unilateral fractures.The interval between injury and surgery was 2 h-16 d (average,4.6 d).All patients were followed up at regular interval.During the follow-up period,clinical and radiographic data were recorded.The clinical efficacy was evaluated with Harris hip function score.Results The mean operative time was 65 min (range,45-120 min); the mean blood loss was 210 ml (range,50-650 ml).All patients began to walk with crutches 3-35 d after surgery.During the follow-up period,no infection,deep vein thrombosis,screwed cut-out and implant failure occurred in all patients.Coxa vara with shortening deformity was noted in 2 cases,solid bone union was found in all the cases.The mean time of fracture healing was 5.2 months (range,3.6-10.5 months).According to Harris hip score,45 cases were classified as excellent,14 as good and 5 as fair,with excellent and good rate being 92.19% (59/64).Conclusion Anatomic locking plate fixation provides stable fixation,with a high union rate and a minimal complication rate in treatment of intertrochanteric and subtrochanteric fractures combined with femoral shaft fracture.%目的 评价采用解剖型锁定钢板固定治疗累及股骨干的转子间或转子下骨折的临床疗效.方法 2009年1月至2011年6月,采用解剖型锁定钢板固定治疗累及股骨干的转子间或转子下骨折者72例,64例患者获得随访.男50例,女14例;年龄21~79岁,平均42.8岁.所有患者均为股骨单侧闭

  6. Breaking Carbon Lock-in

    DEFF Research Database (Denmark)

    Driscoll, Patrick Arthur

    2014-01-01

    This central focus of this paper is to highlight the ways in which path dependencies and increasing returns (network effects) serve to reinforce carbon lock-in in large-scale road transportation infrastructure projects. Breaking carbon lock-in requires drastic changes in the way we plan future...

  7. Homodyne locking of a squeezer

    CERN Document Server

    Heurs, M; James, M R; Huntington, E H

    2009-01-01

    We report on the successful implementation of a new approach to locking the frequencies of an OPO-based squeezed-vacuum source and its driving laser. The technique allows the simultaneous measurement of the phase-shifts induced by a cavity, which may be used for the purposes of frequency-locking, as well as the simultaneous measurement of the sub-quantum-noise-limited (sub-QNL) phase quadrature output of the OPO. The homodyne locking technique is cheap, easy to implement and has the distinct advantage that subsequent homodyne measurements are automatically phase-locked. The homodyne locking technique is also unique in that it is a sub-QNL frequency discriminator.

  8. Column Liquid Chromatography.

    Science.gov (United States)

    Majors, Ronald E.; And Others

    1984-01-01

    Reviews literature covering developments of column liquid chromatography during 1982-83. Areas considered include: books and reviews; general theory; columns; instrumentation; detectors; automation and data handling; multidimensional chromatographic and column switching techniques; liquid-solid chromatography; normal bonded-phase, reversed-phase,…

  9. Hydraulic Evaluation of Culvert Valves at Eisenhower and Snell Locks, St. Lawrence Seaway

    Science.gov (United States)

    2015-06-01

    ER D C/ CH L TR -1 5- 7 Hydraulic Evaluation of Culvert Valves at Eisenhower and Snell Locks, St. Lawrence Seaway Co as ta l a nd H...client/default. ERDC/CHL TR-15-7 June 2015 Hydraulic Evaluation of Culvert Valves at Eisenhower and Snell Locks, St. Lawrence Seaway...ERDC/CHL TR-15-7 ii Abstract The aged, double-skin-plate valves of the Eisenhower and Snell Locks on the St. Lawrence Seaway are being replaced

  10. 股骨近端解剖型锁定钢板治疗老年骨质疏松性EvanⅢ、Ⅳ型股骨粗隆间骨折疗效分析%The therapeutic effect of locking plate internal fixation on senile patients with osteoporotic and EvanⅢ,Ⅳ proximal femoral intertrochanteric fractures

    Institute of Scientific and Technical Information of China (English)

    赖金平; 冯虹; 赵敏; 夏远军

    2015-01-01

    目的:探讨股骨近端解剖型锁定刚板治疗老年骨质疏松性EvanⅢ、Ⅳ型股骨粗隆间骨折的临床效果。方法:回顾性分析66例老年EvanⅢ、Ⅳ型股骨粗隆间骨折伴骨质疏松患者,随机分为对照组和观察组,每组各33例。观察组采用切开复位股骨近端解剖型锁定钢板内固定治疗,对照组采用股骨近端髓内钉治疗。观察手术时间、术中出血量、术后下地时间、住院费用及并发症发生情况,并行Sander评分,术后1、3、6、12月分别复查X片观察骨折愈合情况和内固定位置。结果:观察组手术时间和住院费用明显低于对照组[(67.2±5.8)min比(78.7±7.3)分);(1.2±0.5)万比(1.9±0.8)万],而术中出血量和术后下地时间高于对照组[(262.4±10.1)mL比(174.2±8.8) mL;(3.1±0.6)月比(2.4±0.7)月],差异有统计学意义。12月末次随访,两组Sander评分未见统计学差异,均未发生髋内翻、内固定松动、深静脉血栓等并发症。骨折愈合时间观察组(4.6±0.3)个月,高于对照组(3.8±0.4)月。结论:股骨近端解剖型锁定刚板治疗老年骨质疏松性EvanⅢ、Ⅳ型股骨粗隆间骨折手术时间短、术中出血量高、住院费用低,术后髋关节功能佳;但术后下地时间及骨折愈合时间延长,须谨慎选择患者。%ObjectiveTo investigate the anatomical proximal femur in the treatment of osteoporotic EvanⅢ,Ⅳ intertro-chanteric fractures of the clinical effects of locking rigid board.Methods66 casesge (>65y) with osteoporosis and EvanⅢ,Ⅳ intertrochanteric fractures in our hospital were retrospective analyzed. They were randomly divided into control group and observation group, each group of33 cases. The observation group was treated with open reduction and proximal femoral locking plate fixation ,and the control group with the proximal femur intramedullary nail fixation. The operation

  11. Hammer head beam solution for beam-to-column joints in seismic resistant building frames

    OpenAIRE

    2014-01-01

    This paper presents a research on an innovative stiffened extended end-plate joint, used to connect I-shaped beams to partially-encased composite wide flange columns. In the joint, T-shaped hammer heads cut from the same I-profiles than the beams are used, instead of using traditional haunches. At the joint level, the column web is strengthened by two lateral plates welded to the column flanges; these plates also reinforce the column flanges. This type of joint is proposed to use in the seism...

  12. Definition of Locked-up Stresses around a Rectilinear Welding Seam

    Science.gov (United States)

    Velikanov, N. L.; Koryagin, S. I.; Sharkov, O. V.

    2016-04-01

    In article one of the ways of modelling of the locked-up stresses caused by imposing of a welding seam in a plate is described. These stresses are caused by residual deformations of welding seams. In the settlement scheme the welding seam is presented in the form of an element by the thickness equal to the thickness of a plate, inserted in it with a longitudinal and cross-section tightness. The field of locked-up stresses around the welding seam experiences longitudinal and cross-section shrinkage under cooling and it is defined in work with the use of complex potentials of the theory of elasticity.

  13. Plating of proximal humeral fractures.

    Science.gov (United States)

    Martetschläger, Frank; Siebenlist, Sebastian; Weier, Michael; Sandmann, Gunther; Ahrens, Philipp; Braun, Karl; Elser, Florian; Stöckle, Ulrich; Freude, Thomas

    2012-11-01

    The optimal treatment for proximal humeral fractures is controversial. Few data exist concerning the influence of the surgical approach on the outcome. The purpose of this study was to evaluate the clinical and radiological outcomes of proximal humeral fractures treated with locking plate fixation through a deltopectoral vs an anterolateral deltoid-splitting approach. Of 86 patients who met the inclusion criteria, 70 were available for follow-up examination. Thirty-three patients were treated through a deltopectoral approach and 37 through an anterolateral deltoid-splitting approach. In all cases, open reduction and internal fixation with a PHILOS locking plate (Synthes, Umkirch, Germany) was performed. Clinical follow-up included evaluation of pain, shoulder mobility, and strength. Constant score and Disabilities of the Arm, Shoulder and Hand (DASH) score were assessed. A clinical neurological examination of the axillary nerve was also performed. Consolidation, reduction, and appearance of head necrosis were evaluated radiographically. After a mean follow-up of 33 months, Constant scores, DASH scores, and American Shoulder and Elbow Surgeons scores showed no significant differences between the groups. Clinical neurologic examination of the axillary nerve revealed no obvious damage to the nerve in either group. Deltopectoral and anterolateral detoid-splitting approaches for plate fixation of proximal humeral fractures are safe and provide similar clinical outcomes. The results of this study suggest that the approach can be chosen according to surgeon preference.

  14. Is John Locke a democrat?

    DEFF Research Database (Denmark)

    Svensson, Palle

      Over recent years there has been a tendency to present John Locke as an equalitarian democrat (Ashcraft) and being close to the political views of the levellers (Waldron). This is not a completely new interpretation (Kendall, 1941), but contrasts with the prevalent view presented in textbooks...... (Holden, Held, Ball and Dagger) and monographs on Locke (Dunn, Parry, Marshall). In this paper a new approach to the democratic character of John Locke's political theory is suggested, as his Second Treatise is analysed with Robert A. Dahl's conceptual framework on assumptions for a democratic order...

  15. TIBIOTARSAL COMPRESSION ARTHRODESIS USING A LATERAL LOCKING PLATE.

    Science.gov (United States)

    Coughlin, Michael J; Nery, Caio; Baumfeld, Daniel; Jastifer, James

    2012-01-01

    Objetivos: A artrodese tibiotársica (TT) continua sendo uma importante opção no tratamento da artrose primária ou pós-traumática do tornozelo mas persiste ainda a controvérsia sobre o melhor método de fixação do foco de artrodese. Independentemente do tipo de material utilizado, o objetivo maior é a obtenção da fusão articular sólida, saudável e indolor. O propósito do presente estudo é apresentar os resultados preliminares de um novo sistema de placa bloqueada lateral compressiva para a artrodese do tornozelo. Método: Treze pacientes consecutivos portadores de artrose tibiotársica foram submetidos à artrodese do tornozelo nove pacientes eram homens e quatro mulheres. Com o auxílio de um guia, as superfícies articulares do talo e da tíbia foram decorticadas. Um sistema de compressão foi aplicado para evitar o alinhamento indesejável dos segmentos e uma placa bloqueada pré-moldada lateral foi utilizada para obter a fusão articular. Resultados: Tanto o escore AOFAS quanto o VAS melhoraram com a cirurgia. Todos os tornozelos operados consolidaram dentro do prazo de seis meses. Em todos os pacientes, foi obtido um ótimo alinhamento nos planos sagital, coronal e transverso. Conclusão: Acreditamos que a combinação de compressão bilateral, cortes ósseos com contornos pré-demarcados e placa lateral bloqueada, constitui uma técnica moderna, segura e útil para a artrodese do tornozelo.

  16. 锁定加压接骨板结合克氏针治疗中青年C型桡骨远端骨折%Locking compression plate combined with Kirschner wire fixation for treatment of high-energy type C distal radius fractures in young patients

    Institute of Scientific and Technical Information of China (English)

    王健; 张怀保; 卓高豹; 邱海胜; 劳杰

    2014-01-01

    Objective To investigate the long-term efficacy of locking compression plate (LCP) combined with Kirschner wire fixation in treating high-energy type C distal radius fractures in young adults.Methods From June 2008 to November 2012,26 young adults (14 males and 12 females) with high-energy type C distal radius fractures were treated.The age of the patients averaged 28 years.According to AO classification,there were 14,6 and 6 cases of type C1,type C2 and C3 fractures,respectively.Twenty,4 and 2 cases were treated by fixation using LCP combined with Kirschner wire through volar,dorsal and radial approach,respectively.Postoperative evaluations included visual analogue score of wrist pain,active range of motion of the wrist,Gartland-Werley score,Batra radiological score and complications.Results In 26 patients,the follow-up duration was 18 to 48 months,the average being 26 months.Fracture healing time was 12 to 24 weeks,with an average of 18 weeks.The time of Kirschner wire removal was 3 to 5 weeks postoperatively (mean,4 weeks),and that of plate removal was 12 to 18 months (average 14 months).Reflex sympathetic dystrophy occurred in 1 case 3 months after the surgery.Postoperative traumatic arthritis occurred in 3 cases.The Gartland-Werley scores at the final follow-up were excellent in 18 cases,good in 5 cases and fair in 3 cases.Conclusion There is usually significant displacement of irregular fracture fragments on the articular surface in young adults with high-energy type C distal radius fractures.LCP combined with Kirschner wire fixation through volar,dorsal and radial approach can obtain personalized anatomic reduction of the fracture.It is one of the effective methods for treatment of unstable distal radius fractures.%目的 探讨锁定加压接骨板(locking compression plates,LCP)结合克氏针治疗中青年高能量损伤C型桡骨远端骨折的疗效.方法 自2008年6月至2012年11月收治中青年C型桡骨远端骨折26例,平均年龄28

  17. Minimally invasive treatment of humeral multi-fractures with a locking compression plate%锁定加压接骨板微创固定治疗肱骨二或三部分骨折的初步报告

    Institute of Scientific and Technical Information of China (English)

    杨铁毅; 刘粤; 张岩; 刘树义; 郑士伟; 王思辉; 王治; 吴亮; 黄国华; 姜锐

    2010-01-01

    Objective To investigate the efficacy of minimally invasive treatment of humeral multi-fractures with a locking compression plate through the anterior humeral approach. Methods From March 2005 to October 2008, 22 cases of unstable humeral multi-fractures were treated by the above method.Of them, 12 were injured in a traffic accident and 10 in daily life. There were 13 males and 9 females, with a mean age of 63.4 (ranging from 46 to 78) years. The left side was involved in 7cases, and the right side was involved in 14 cases. According to X-rays, 11 were fractures of humeral shaft and proximal humerus, 8 were fractures of humeral shaft and distal humerus, 2 were fractures of humeral shaft and proximal humerus and shoulder dislocation, and one case was fractures of humeral shaft, proximal and distal humerus and shoulder dislocation. Of them, 2 had emergency treatment of the injured radial nerve and internal fixation with Philos plate. Results The mean operative time was 107.9 min(range, 78 ~ 150 min ), and operative blood loss was 274 mL (range, 110 ~ 450 mL). In this group, 20 patients were followed up for 8 to 22 (average, 9. 4)months. All these patients had bone healing in 8 to 16 (average, 11.5) weeks. By Neer evaluation system,12 cases were rated as excellent, 5 as good, and 3 as fine, with the excellent-to-good rate being 85.0%. The function of elbow was rated by HSS as excellent in 16 cases and good in 4, with the excellent-to-good rate being 100%. Conclusion Minimally invasive treatment with a locking compression plate through anterior humeral approach is an effective and safe method for treating the humeral multi-fractures.%目的 探讨肱骨前方入路结合锁定加压接骨板微创治疗肱骨二或三部分骨折的疗效. 方法 2005年3月至2008年10月,经肱骨前方入路应用锁定加压钢板(LCP)或肱骨近端内固定系统(PHILOS)钢板微创治疗22例肱骨二或三部分骨折患者,男13例,女9例;年龄46~78岁,平均63.4

  18. 49 CFR 236.765 - Locking, mechanical.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Locking, mechanical. 236.765 Section 236.765 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION... Locking, mechanical. An arrangement of locking bars, dogs, tappets, cross locking and other apparatus...

  19. 49 CFR 236.336 - Locking bed.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Locking bed. 236.336 Section 236.336 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION... Instructions § 236.336 Locking bed. The various parts of the locking bed, locking bed supports, and tappet...

  20. 49 CFR 236.330 - Locking dog of switch-and-lock movement.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Locking dog of switch-and-lock movement. 236.330 Section 236.330 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD... Rules and Instructions § 236.330 Locking dog of switch-and-lock movement. Locking dog of...

  1. 49 CFR 236.337 - Locking faces of mechanical locking; fit.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Locking faces of mechanical locking; fit. 236.337 Section 236.337 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD... Rules and Instructions § 236.337 Locking faces of mechanical locking; fit. Locking faces shall...

  2. 切开复位锁定钢板内固定和人工肱骨头置换治疗高龄肱骨近端粉碎性骨折的对比研究%A retrospective trial of open reduction and locking plate internal fixation versus hemiarthroplasty for comminuted proximal humeral fractures in old patients

    Institute of Scientific and Technical Information of China (English)

    何帮剑; 金红婷; 吕一; 季四青; 周国庆; 童培建

    2013-01-01

    性骨折,尤其是合并重度骨质疏松者,建议采用人工肱骨头置换术治疗.%Objective;To compare open reduction and locking plate internal fixation with hemiarthroplasty in the clinical curative effects and safety for comminuted proximal humeral fractures in old patients. Methods:The medical records of 50 old patients who underwent operative treatment for comminuted proximal humeral fractures were analyzed retrospectively. Twenty-three patients(group A) were administrated with open reduction and locking plate internal fixation, while the others (group B)were administrated with hemiarthroplasty. The two groups were compared with each other in such parameters as operative time, blood loss, postoperative drainage, hospital stay, Constant- Murley shoulder scores at last follow-up,and complications during postoperative period and follow - up period. ResultS;The operative time( (70. 74 ±10.16) min) ,blood loss( ( 192. 96 ±50. 29) ml) , postoperative drainage( (52. 78 ± 10. 59) ml) and hospital stay( (9. 78 ± 2. 14) d) of group B were all lower than those of group A( (92. 17 ± 11.66) min, (242. 61 ±63. 48) ml, (74. 35 ±20. 91) ml, ( 14. 22 ±4. 30) d) respectively, and there were statistical differences between the 2 groups (t =6. 946 ,P = 0. 000;t =3. 085, P=0. 003 ;t =4. 705, P = 0. 000; t =4. 733, P = 0.000). There were no statistical differences in ihe following scores of shoulder pain( (12.65 ±1.92) ,(13. 19 ± 1.59)) activities of daily living( ( 15. 73 ± 2. 20) , ( 15. 93 ± 2. 25 ) ) , range of motion of shoulder( ( 28. 70 ± 7. 71 ) , ( 30. 59 ± 7. 72 ) ) , muscle power of upper limb((13.48 ±3. 37) ,( 13. 30 ±3. 18 )) and Constant-Murley total scores( (70. 57 ± 9. 31 ) , (73. 00 ± 7. 61 ) ) between the 2 groups respectively(t = - 1. 072 ,P =0. 289;t = - 0. 295 ,P = 0. 769;t = - 0. 866,P = 0. 391 ;t = 0. 196 ,P = 0. 845;t = - 1.018,P = 0. 314). The patients in the 2 groups were all followed up for 24 - 72 months with a median of 51. 5

  3. Long term outcomes of surgical treatment of distal femoral fractures in post-polio patients with locking compression plates%锁定加压钢板治疗小儿麻痹症后遗症患者股骨远端骨折远期疗效

    Institute of Scientific and Technical Information of China (English)

    熊进; 王渭君; 施鸿飞; 陈东阳; 陈一心; 王骏飞; 王守丰; 邱勇

    2012-01-01

    目的 分析使用锁定加压钢板(LCP)治疗小儿麻痹症(简称儿麻)后遗症患者股骨远端骨折的远期疗效.方法 采用LCP治疗9例儿麻后遗症患者股骨远端骨折(股骨远端骨折5例,髁上骨折2例,髁间骨折2例).分别于术后6周、3个月、6个月、1年及2年时进行规律随访.结果 手术时间1.0~3.0 h,术中出血量50~300 ml.术后住院时间 5~7 d.9例均获完整随访,骨折在术后3~7个月骨性愈合.末次随访时患肢功能均达到受伤前水平.无感染等并发症发生.结论 采用LCP治疗儿麻后遗症患者股骨远端骨折可以减少骨折端暴露,对局部血供、骨膜的破坏小,对疏松骨质具有较好的把持力,降低并发症发生,可获得良好的远期疗效.%Objectives To review the long term outcomes of distal femoral fracture in patients survived from polio by locking compression plates ( LCP ). Methods LCP were used in treating the distal femur fractures of nine polio patients , including five fractures on distal femurs, two supracondylar fractures and two intercondylar fractures. Patients were followed regularly at 6 weeks, i2 weeks, 6 months, one and two years post-operation. Results The duration of operation was i. 0 ~ 3. 0 h while blood loss was 50 ~ 300 ml. Patients were discharged from hospital at 5 ~ 7 days after operation. Bony unions were observed from three to seven months after operation. Patients showed good range of motion of the knee on affected side as that before fracture. Complications including infection were not observed in these patients. Conclusions LCP can provide stable fixation and good long term outcomes for distal femoral fractures in patients survived from polio with less harm on blood supply and periosteum on fracture sites, and less incidence of complication.

  4. 微创锁定板内固定和切开复位内固定治疗跟骨关节内骨折效果分析%Analysis Efficacy of Minimally Invasive Locking Plate Fixation and Open Reduction Internal Fixation in the Treatment of Intra-articular Calcaneal Fractures

    Institute of Scientific and Technical Information of China (English)

    张番; 郑淑媛

    2014-01-01

    Objective:To investigate the clinical treatment efficacy of minimally invasive locking plate fixation and open reduction internal fixation in the treatment of intra-articular calcaneal fractures.Method:76 patients with calcaneal fracture in orthopedic department for elective surgery in our hospital from June 2012 to July 2013 were selected.All cases were randomly divided into the minimally invasive fixation group and the open reduction internal fixation group according to the admission number parity,38 cases in each group.The surgical time,intraoperative and postoperative bleeding, hospitalization time,healing time of the two groups were compared.The postoperative treatment efficacies of the two groups were evaluated by AOFAS ankle and hindfoot scoring system,visual analog scale(VAS method)and condensed Health Status Scale(SF-36).Postoperative complications of the two groups were recorded.Result:The surgical time and intraoperative and postoperative bleeding volume of the minimally invasive fixation group were significantly less than the open reduction internal fixation group,the differences were statistically significant(P0.05).The total complication rate of the minimally invasive fixation group was 7.9%,it was significantly lower than 36.8% of the open reduction internal fixation group,the difference was statistically significant(P0.05);微创内固定组总并发症发生率7.9%明显低于切口内固定组的36.8%,差异有统计学意义(P<0.05)。结论:微创锁定板内固定治疗跟骨关节内骨折临床效果优于切开复位内固定,有助于减少术后并发症的发生,促进跟骨术后功能恢复,提高患者生活质量,值得在临床推广使用。

  5. 肱骨近端锁定钢板治疗老年肱骨近端骨折的临床分析%Clinical Analysis of Proximal Humeral Locking Plate in the Treatment of Elderly Fractures of the Proximal Humerus

    Institute of Scientific and Technical Information of China (English)

    郭秀峰

    2015-01-01

    Objective Discussion of elderly patients with fracture of humerus proximal row locking proximal humeral plate (LPHP) treatment effect.Methods40 patients were analyzed, randomly divided into observation group (20 cases) and control group (20 cases). Observation group line LPHP treatment, control line of traditional steel cross needle treatment, observe the therapeutic effect of twogroups.Results Control group of 5 cases of screw loosening, slide, the observation group. Postoperative 6 and 12 months observation group SPADI score is better thanthat of control group, comparing differences between group significantly (P<0.05).Conclusion Elderly patients with fracture of humerus proximal row LPHP treatment effect is obvious, has the characteristics of fixed effect is exact, fewer complications, and convenient for patients with early functional exercise.%目的:探讨老年肱骨近端骨折患者行肱骨近端锁定钢板(LPHP)的治疗效果。方法以40例患者展开分析,随机分为观察组(20例)和对照组(20例)。观察组行LPHP治疗,对照组行传统钢板交叉针治疗,观察两组的治疗效果。结果对照组有5例螺丝钉松动、滑落的情况,观察组无。术后6、12个月观察组SPADI评分优于对照组,组间比较差异明显(P<0.05)。结论老年肱骨近端骨折患者行LPHP治疗效果明显,具有固定效果确切、并发症少的特点,便于患者早期进行功能锻炼。

  6. 肱骨近端锁定钢板治疗肱骨近端粉碎性骨折的中期随访研究%A medium term analysis on of therapeutic effects of locking proximal humerus plate for the treatment of comminuted fractures of proximal humerus

    Institute of Scientific and Technical Information of China (English)

    李浪; 黄光平; 项舟; 黄富国; 岑石强; 钟刚; 张世琼; 杨天府; 王光林

    2010-01-01

    目的:探讨肱骨近端锁定钢板(locking plate of proximal humerus,LPHP)治疗肱骨近端粉碎性骨折的中期疗效,为临床应用提供依据.方法:总结2005年8月至2008年4月23例使用LPHP治疗的肱骨近端粉碎性骨折患者资料,男12例,女11例;年龄27~76岁,平均51.5岁;车祸伤18例,摔伤4例,重物压砸伤1例.Neer分型:三部分骨折11例,四部分骨折12例.14例植骨,其中6例自体髂骨植骨,7例人工骨植骨,1例自体髂骨加人工骨混合植骨.使用Constant-Murley(C-M)肩关节评分标准进行疗效评定.结果:术后所有患者切口Ⅰ期愈合,所有患者定期随访,分别在术后3、6和12个月,随访时间17~49个月,平均35.25个月.20例于术后4~7个月获得骨性愈合.术后3、6与12个月C-M肩关节评分比较,差异无统计学意义,术后12个月评分38~100分,平均(79.85±17.23)分,其中优8例,良8例,一般5例,差2例.LPHP加植骨组优6例,良4例,一般3例,差1例;单纯LPHP固定组优2例,良4例,一般2例,差1例.结论:LPHP治疗肱骨近端粉碎性骨折,中期疗效显著,对伴有骨质疏松及骨缺损的肱骨近端粉碎性骨折应常规植骨.

  7. The application of locking proximal femoral plate and proximal femoral nail antirotation in femoral subtrochanteric fracture%股骨近端锁定钢板与股骨近端抗旋髓内钉治疗股骨转子下骨折的疗效

    Institute of Scientific and Technical Information of China (English)

    孟位明; 许红生; 付卫杰; 赵志江; 张磊; 李广

    2014-01-01

    目的:探讨股骨近端锁定钢板(LPFP)与股骨近端抗旋髓内钉(PFNA)治疗股骨转子下骨折的临床效果。方法44例股骨转子下骨折患者采用LPFP固定18例、PFNA固定26例。结果 LPFP固定:手术时间60~120 min,术中出血量400~800 ml,骨折愈合时间11~21周。PFNA固定:手术时间60~90 min,术中出血量为150~400 ml,骨折愈合时间11~20周。44例均获得随访,时间10~24个月。髋关节功能按Harris标准进行评价:优31例,良10例,优良率为93.2%。结论两种方式治疗股骨转子下骨折均可获得满意效果,而PFNA具有术中出血量少、手术时间短等优点。%Objective To explore the therapeutic effect of the two internal fixation methods by using locking proximal femoral plate(LPFP)and proximal femoral nail antirotation(PFNA)in femoral subtrochanteric fractures.Methods There were 44 patients who suffered femoral subtrochanteric fracture patients and received operation.The PFNA were used for internal fixation in 26 patients and LPFP in 18 patients.Results By using LPFP fixation,the operation time was 60 ~120 minutes,intraoperative blood loss was 400~800 ml,the bone healing time was 11 ~21 weeks. By using PFNA fixation,the operation time was 60~90 minutes,intraoperative blood loss was 150~400 ml,the bone healing time was 1 1 ~20 weeks.All 44 patients were followed up from 10 months to 24 months.According to Harris rate scale,the results were excellent in 31 patients,good in 10,with excellent and good rate of 93.2%.Con-clusions PFNA and LPFP were both effective devices in femoral subtrochanteric fractures,but by using PFNA fixa-tion,patients suffer less intraoperaive blood loss and shorter operation time.

  8. Internal fixation of proximal humeral fractures with the proximal humeral internal locking system plate in the elderly%肱骨近端内固定锁定系统接骨板治疗老年性肱骨近端骨折

    Institute of Scientific and Technical Information of China (English)

    王英; 申海波; 崔岩

    2012-01-01

    目的 探讨锁定接骨板在治疗老年肱骨近端骨折的临床作用.方法 2008年6月至2011年6月,应用AO PHILOS接骨板治疗老年肱骨近端骨折32例.经三角肌胸大肌肌间沟入路,术中C臂透视下复位骨折端,接骨板置于结节间沟外侧0.5cm、大结节顶点下方0.8~1.0cm.术后医生指导下早期康复锻炼.结果 32例患者中28例术后获得随访,随访时间6-12个月,平均7.2个月.术后无腋神经血管损伤,无感染和伤口开裂.X线片显示骨折复位满意,钢板螺钉位置良好,无内固定松动断裂,无复位丢失,无骨折不愈合及肱骨头坏死病例.7例患者出现短时假性肩关节脱位,功能锻炼后自动复位;骨折端轻度复位不佳3例.骨折愈合时间13-32周,平均16.5周.所有患者均遗留有不同程度的肩关节活动受限,主要是上举受限.NEER评分:优9例,良11例,可8例,优良率71.4%.结论 肱骨近端锁定接骨板是治疗老年人肱骨近端骨折的理想内固定材料具有固定可靠、对肱骨头血供影响小、并发症少等优点,利于术后早期功能锻炼.%Objective To investigate the clinical effects of internal fixation of proximal humeral fractures with the proximal humeral internal locking system (PHILOS) plate in the elderly. Methods 32 elderly patients with proximal humeral fractures were treated with the PHILOS plate from June 2008 to June 2011. With C-arm X-rays during surgery, reduction and fixation were performed through pectoro-deltoid approach. The plate was placed 0.5cm to the lateral edge of the intertubercular groove and 0.8-1.0cm under the top of the greater tubercle. Early functional exercises were done under the doctor's direction. Results Among them, 28 patients were followed up postoperatively for an average period of 7.2 months (range; 6-12 months). No neurovascular injury of the axilla, infection or wound dehiscence occurred after surgery. The postoperative radiographs showed satisfactory fracture

  9. Innovation and Lock-in

    DEFF Research Database (Denmark)

    Cantner, Uwe; Vannuccini, Simone

    2016-01-01

    , especially when innovation is concerned. Also, we address the question if lock-in is a well-defined concept at all. To offer a fresh view on lock-in and to tackle the issues just raised, we employ the replicator dynamics model. By making a parallel between monopolization in the replicator dynamics...... that further structural features - for example users heterogeneity - may play a relevant role in affecting the outcome of dynamic allocation and competition processes....

  10. John locke on personal identity.

    Science.gov (United States)

    Nimbalkar, Namita

    2011-01-01

    John Locke speaks of personal identity and survival of consciousness after death. A criterion of personal identity through time is given. Such a criterion specifies, insofar as that is possible, the necessary and sufficient conditions for the survival of persons. John Locke holds that personal identity is a matter of psychological continuity. He considered personal identity (or the self) to be founded on consciousness (viz. memory), and not on the substance of either the soul or the body.

  11. John locke on personal identity

    Directory of Open Access Journals (Sweden)

    Nimbalkar Namita

    2011-01-01

    Full Text Available John Locke speaks of personal identity and survival of consciousness after death. A criterion of personal identity through time is given. Such a criterion specifies, insofar as that is possible, the necessary and sufficient conditions for the survival of persons. John Locke holds that personal identity is a matter of psychological continuity. He considered personal identity (or the self to be founded on consciousness (viz. memory, and not on the substance of either the soul or the body.

  12. John locke on personal identity

    Directory of Open Access Journals (Sweden)

    Namita Nimbalkar

    2011-03-01

    Full Text Available John Locke speaks of personal identity and survival of consciousness after death. A criterion of personal identity through time is given. Such a criterion specifies, insofar as that is possible, the necessary and sufficient conditions for the survival of persons. John Locke holds that personal identity is a matter of psychological continuity. He considered personal identity (or the self to be founded on consciousness (viz. memory, and not on the substance of either the soul or the body.

  13. Passively mode locked Raman laser

    CERN Document Server

    Liang, W; Savchenkov, A A; Matsko, A B; Seidel, D; Maleki, L

    2010-01-01

    We report on the observation of a novel mode locked optical comb generated at the Raman offset (Raman comb) in an optically pumped crystalline whispering gallery mode resonator. Mode locking is confirmed via measurement of the radio-frequency beat note produced by the optical comb on a fast photodiode. Neither the conventional Kerr comb nor hyper-parametric oscillation is observed when the Raman comb is present.

  14. Is John Locke a democrat?

    DEFF Research Database (Denmark)

    Svensson, Palle

    (Holden, Held, Ball and Dagger) and monographs on Locke (Dunn, Parry, Marshall). In this paper a new approach to the democratic character of John Locke's political theory is suggested, as his Second Treatise is analysed with Robert A. Dahl's conceptual framework on assumptions for a democratic order......, criteria for a democratic process, and the institutions of polyarchy. The conclusion has implications for the relationship between political liberalism and constitutionalism on the one hand and democracy on the other....

  15. An assistive device designed to convey independent donning of a shuttle lock trans-tibial prosthesis for a multiple limb amputee.

    Science.gov (United States)

    Tamir, E; Heim, M; Oppenheim, U; Siev-Ner, I

    2003-04-01

    This contribution describes a simple device designed to convey independent donning of a shuttle lock trans-tibial prosthesis for a multiple limb amputee. The device is made of a post with a shuttle lock mechanism at one end and a plate covered by rubber at the other end. This device enables correct positioning of the silicone liner and independent attachment to the prosthesis.

  16. Plate on Plate Osteosynthesis for the Treatment of Nonhealed Periplate Fractures

    OpenAIRE

    Georgios Arealis; Nikolaou, Vassilios S.; Andrew Lacon; Neil Ashwood; Mark Hamlet

    2014-01-01

    Purpose. The purpose of this paper is to present our technique for the treatment of periplate fractures. Methods. From 2009 to 2012 we treated three patients. In all cases the existing plate was left and the new one placed over the existing. Locking screws were placed through both plates. The other screws in the new plate were used as best suited the fracture. Results. In all cases less than 6 months had passed between fractures. None of the original fractures had healed. Mean followup was 2 ...

  17. Hollow lag screws combined with reconstruction plates for treatment of high anterior column fracture of the acetabulum with intact true pelvic brim%空心拉力螺钉联合重建钢板治疗真骨盆缘完整的髋臼高位前柱骨折

    Institute of Scientific and Technical Information of China (English)

    周炎; 刘世清; 瞿新丛; 余铃; 廖琦; 黄涛; 赵奇; 张春

    2014-01-01

    目的 探讨真骨盆缘完整的髋臼高位前柱骨折采用空心拉力螺钉联合重建钢板固定的疗效.方法 2009年6月-2012年9月收治真骨盆缘完整的髋臼高位前柱骨折6例,其中挤压伤4例,高处坠落伤2例;参照谭国庆等分型:单纯型4例,粉碎型2例.采用髂股入路先行髋臼顶复位空心拉力螺钉固定,后复位、重建钢板固定髂骨翼及髂嵴.结果 6例术后随访12~24个月,平均18个月.所有患者骨折均愈合,愈合时间12 ~ 18周,平均16周.术后按Matta影像学评定标准,优5例,良1例,优良率100%.末次随访时按Matta改良的Merle d'Aubigne和Postel髋关节功能评分标准,优4例,良2例,优良率100%.术后2例出现股外侧皮神经麻痹,口服神经营养药物2~3个月后均恢复.结论 空心拉力螺钉联合重建钢板治疗真骨盆缘完整的髋臼高位前柱骨折固定可靠,临床疗效满意.%Objective To investigate the clinical effect of high anterior column fracture of the acetabulum with intact true pelvic brim fixed using hollow lag screws plus reconstruction plates.Methods All cases of high anterior column fracture of the acetabulum with intact true pelvic brim treated from June 2009 to September 2012 were included.Crush contributed to injury in 4 cases and high fall to injury in 2 cases.According to Tan Guoqing' s classification,4 cases were classified as simple type and 2 cases comminuted type.All cases were treated through iliofemoral approach to reduce and fix acetabular roof by hollow lag screws firstly,and then fix iliac wing and iliac crest by reconstruction plates.Results Six cases were followed up for mean 18 months (range,12-24 months).Fracture healed after mean 16 weeks (range,12-18 weeks).Radiological results assessed using Matta' s score system were excellent in 5 cases and good in 1 case with good to excellent rate of 100%.At the final follow-up,Merle d' Aubigne and Postel hip score was excellent in 4 cases and good in 2

  18. Oscillating water column structural model

    Energy Technology Data Exchange (ETDEWEB)

    Copeland, Guild [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Bull, Diana L [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Jepsen, Richard Alan [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Gordon, Margaret Ellen [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2014-09-01

    An oscillating water column (OWC) wave energy converter is a structure with an opening to the ocean below the free surface, i.e. a structure with a moonpool. Two structural models for a non-axisymmetric terminator design OWC, the Backward Bent Duct Buoy (BBDB) are discussed in this report. The results of this structural model design study are intended to inform experiments and modeling underway in support of the U.S. Department of Energy (DOE) initiated Reference Model Project (RMP). A detailed design developed by Re Vision Consulting used stiffeners and girders to stabilize the structure against the hydrostatic loads experienced by a BBDB device. Additional support plates were added to this structure to account for loads arising from the mooring line attachment points. A simplified structure was designed in a modular fashion. This simplified design allows easy alterations to the buoyancy chambers and uncomplicated analysis of resulting changes in buoyancy.

  19. 个体化数字导航模板引导儿童髋部锁定加压接骨板置入的应用%Locking compression pediatric hip plate placement assisted by individualized navigation templates for pediatric hip diseases

    Institute of Scientific and Technical Information of China (English)

    郑朋飞; 徐鹏; 陈杰; 楼跃; 王黎明; 姚庆强; 唐凯

    2016-01-01

    目的 探讨利用计算机辅助设计和3D打印技术制作的个体化手术导航模板实现儿童髋部锁定加压接骨板(locking compression pediatric hip plate,LCP-PHP)精确置入的可行性.方法 2012年1月至2014年12月需使用LCP-PHP治疗的8例患儿,4例股骨颈骨折,4例发育性髋关节脱位.依据CT数据使用3D打印机打印个体化股骨近端模型,计算机辅助模拟骨折复位和LCP-PHP经颈螺钉置入过程,通过软件设计并打印出与股骨近端匹配的经颈螺钉置入导航模板,术前3D模型模拟手术验证可行后,术中在导航模板辅助下置人导针及LCP-PHP.结果 3D打印的个体化手术导航模板术中与股骨近端骨性标志均匹配良好,能够辅助2~3枚螺钉精确置入股骨颈,螺钉置入后经术中X线检查与术前设计基本一致.LCP-PHP置入的手术时间平均约为27.5 min,术中使用X线透视平均6.0次,较9例同期传统手术组显著降低(P<0.05),术后伤口均一期愈合.术后X线片示股骨颈骨折复位良好,股骨近端内翻截骨角度合适,髋关节对股骨头的包容较好.应用导航模板辅助置入的LCP-PHP的进钉点、进钉方向、螺钉长度均与术前设计方案基本一致,螺钉未损伤骺板.术后随访6~12个月,股骨颈骨折处及股骨近端截骨处均愈合、无1例发生股骨头坏死、髋内翻或再脱位.按ratliff评价标准评价髋关节术后功能情况优4例,良4例.结论 3D打印个体化手术导航模板可以辅助LCP-PHP的精确置入,达到预期手术效果,减少医源性股骨颈骨骺及血供损伤,而且可以节省手术时间,减少术中出血,减少患儿及手术操作人员的射线暴露,值得推广应用.%Objective To explore the feasibility and accuracy of a navigation template for placing screws in locking compression pediatric hip plate (LCP-PHP) based on digital design and three-dimensional (3D) printing technology.Methods From January 2012 to December 2014,the

  20. 肱骨近端锁定加压钢板置入内固定治疗复杂肱骨近端骨折的并发症%Postoperative complications of complex proximal humeral fractures after treated with proximal humeral internal locking system plate fixation

    Institute of Scientific and Technical Information of China (English)

    马福元; 杨铁毅; 姜锐; 张岩; 刘粤; 邵进

    2013-01-01

    BACKGROUND:Proximal humeral internal locking system fixation for complex humeral fractures via deltoid splitting approach provides good clinical results, but certain complications stil existed. OBJECTIVE:To explore the postoperative complications and the related risk factors for displaced three-part and four-part fractures of proximal humerus treated with proximal humeral internal locking system fixation via deltoid-splitting approach, and to propose the corresponding countermeasures. METHODS:106 cases with displaced three-part and four-part fractures of proximal humerus were retrospectively analyzed. The relationship between postoperative complications and the related risk factors was analyzed with Logistic regression analysis. RESULTS AND CONCLUSION:A total of 81 patients were fol owed-up for 12 to 30 months. The mean Constant score at 12 months after operation was (76.57±4.70) points. The postoperative complications occurred in 31 patients (38.3%) of which impingement syndrome involved in 16 cases (19.8%), head-shaft angle loss in six cases (7.4%), head-shaft angle loss combined with screws cut-out in two cases (2.5%), pure screws cut-out in two cases (2.5%), humeral head necrosis in two cases (2.5%), fat liquefaction in five cases (6.2%). Single factor analysis showed that there were significant differences in the superiorly located greater tuberosity, superiorly located plate and Neer classification between impingement group and un-impinged group (P<0.05). There were statistical y significant differences in age, postoperative medial cortical defects and Neer classification between head-shaft angle loss group and un-loss group (P<0.05). By means of logistic regression analysis, the superiorly located greater tuberosity, superiorly located plate and Neer classification were the individual predictors for postoperative impingement syndrome;postoperative medial cortical defect and Neer classification were the individual predictors for postoperative head

  1. 解剖型锁定加压钢板与人工肱骨头置换治疗肱骨近端骨折的效果比较%Effect comparison between anatomical locking plate fixation and humeral head replacement in the treatment of proximal humerus fractures

    Institute of Scientific and Technical Information of China (English)

    郑创义

    2015-01-01

    目的:比较解剖型锁定加压钢板与人工肱骨头置换治疗肱骨近端骨折的疗效。方法选取本院骨科2005年1月~2014年3月收治的肱骨近端骨折患者45例,根据手术方法将患者分为内固定术组(n=27)和肱骨头置换术组(n=18)。内固定术组给予骨折切开复位、解剖型锁定加压钢板固定,肱骨头置换术组给予人工肱骨头置换方法治疗。术后定期复查X线片,了解并发症发生情况。同时在末次复诊时按照Constant-Murley肩关节评分标准进行功能评分。结果术后随访8~36个月,平均18个月。内固定术组中的主要并发症是肱骨头坏死(6例)、骨折畸形愈合(7例)和骨性关节炎(2例);肱骨头置换术组的并发症是大结节、小结节(或两者均有之)骨质吸收(6例)、关节不稳定(1例)、异位骨化(1例)。内固定组的并发症发生率(55.6%)显著高于肱骨头置管术组(44.4%)(P<0.05),优良率(77.8%)显著高于肱骨头置换组(66.7%)(P<0.05),Constant-Murley评分显著高于肱骨头置换组(P<0.05)。结论解剖型锁定加压钢板治疗肱骨近端骨折的疗效优于人工肱骨头置换,值得临床推广。%Objective To compare the therapeutic effects of anatomical locking plate fixation (ALPF) and humeral head replacement (HHR) on proximal humerus fractures. Methods 45 patients with proximal humerus fractures at the ortho-pedics department in our hospital from January 2005 to March 2014 were selected and divided into ALPF group (n=27) and HHR group (n=18) based on operation methods.ALPF group were received anatomical proximal humeral locking plate fixation,while HHR group underwent humeral head replacement. X-rays was regularly reviewed after surgery to e-valuate complications,and Constant-Murley score system was used to assess the shoulder joint function at the last re-turn visit. Results All patients were followed up for 8

  2. JCE Feature Columns

    Science.gov (United States)

    Holmes, Jon L.

    1999-05-01

    The Features area of JCE Online is now readily accessible through a single click from our home page. In the Features area each column is linked to its own home page. These column home pages also have links to them from the online Journal Table of Contents pages or from any article published as part of that feature column. Using these links you can easily find abstracts of additional articles that are related by topic. Of course, JCE Online+ subscribers are then just one click away from the entire article. Finding related articles is easy because each feature column "site" contains links to the online abstracts of all the articles that have appeared in the column. In addition, you can find the mission statement for the column and the email link to the column editor that I mentioned above. At the discretion of its editor, a feature column site may contain additional resources. As an example, the Chemical Information Instructor column edited by Arleen Somerville will have a periodically updated bibliography of resources for teaching and using chemical information. Due to the increase in the number of these resources available on the WWW, it only makes sense to publish this information online so that you can get to these resources with a simple click of the mouse. We expect that there will soon be additional information and resources at several other feature column sites. Following in the footsteps of the Chemical Information Instructor, up-to-date bibliographies and links to related online resources can be made available. We hope to extend the online component of our feature columns with moderated online discussion forums. If you have a suggestion for an online resource you would like to see included, let the feature editor or JCE Online (jceonline@chem.wisc.edu) know about it. JCE Internet Features JCE Internet also has several feature columns: Chemical Education Resource Shelf, Conceptual Questions and Challenge Problems, Equipment Buyers Guide, Hal's Picks, Mathcad

  3. Glass-silicon column

    Energy Technology Data Exchange (ETDEWEB)

    Yu, Conrad M.

    2003-12-30

    A glass-silicon column that can operate in temperature variations between room temperature and about 450.degree. C. The glass-silicon column includes large area glass, such as a thin Corning 7740 boron-silicate glass bonded to a silicon wafer, with an electrode embedded in or mounted on glass of the column, and with a self alignment silicon post/glass hole structure. The glass/silicon components are bonded, for example be anodic bonding. In one embodiment, the column includes two outer layers of silicon each bonded to an inner layer of glass, with an electrode imbedded between the layers of glass, and with at least one self alignment hole and post arrangement. The electrode functions as a column heater, and one glass/silicon component is provided with a number of flow channels adjacent the bonded surfaces.

  4. Medicine in John Locke's philosophy.

    Science.gov (United States)

    Sanchez-Gonzalez, M A

    1990-12-01

    John Locke's philosophy was deeply affected by medicine of his times. It was specially influenced by the medical thought and practice of Thomas Sydenham. Locke was a personal friend of Sydenham, expressed an avid interest in his work and shared his views and methods. The influence of Sydenham's medicine can be seen in the following areas of Locke's philosophy: his "plain historical method"; the emphasis on observation and sensory experience instead of seeking the essence of things; the rejection of hypotheses and principles; the refusal of research into final causes and inner mechanisms; the ideal of irrefutable evidence and skepticism on the possibilities of certainty in science. The science which for Locke held the highest paradigmatic value in his theory of knowledge was precisely medicine. To a great extent, Locke's Essay on Human Understanding can be understood as an attempt to justify, substantiate, and promote Sydenham's medical method. This method, generalized, was then proposed as an instrument for the elaboration of all natural sciences.

  5. The healing philosopher: John Locke's medical ethics.

    Science.gov (United States)

    Short, Bradford William

    2004-01-01

    This article examines a heretofore unexplored facet of John Locke's philosophy. Locke was a medical doctor and he also wrote about medical issues that are controversial today. Despite this, Locke's medical ethics has yet to be studied. An analysis of Locke's education and his teachers and colleagues in the medical profession, of the 17th century Hippocratic Oath, and of the reaction to the last recorded outbreak of the bubonic plague in London, shines some light on the subject of Locke's medical ethics. The study of Locke's medical ethics confirms that he was a deontologist who opposed all suicide and abortion through much of pregnancy.

  6. Distillation Column Flooding Predictor

    Energy Technology Data Exchange (ETDEWEB)

    George E. Dzyacky

    2010-11-23

    The Flooding Predictor™ is a patented advanced control technology proven in research at the Separations Research Program, University of Texas at Austin, to increase distillation column throughput by over 6%, while also increasing energy efficiency by 10%. The research was conducted under a U. S. Department of Energy Cooperative Agreement awarded to George Dzyacky of 2ndpoint, LLC. The Flooding Predictor™ works by detecting the incipient flood point and controlling the column closer to its actual hydraulic limit than historical practices have allowed. Further, the technology uses existing column instrumentation, meaning no additional refining infrastructure is required. Refiners often push distillation columns to maximize throughput, improve separation, or simply to achieve day-to-day optimization. Attempting to achieve such operating objectives is a tricky undertaking that can result in flooding. Operators and advanced control strategies alike rely on the conventional use of delta-pressure instrumentation to approximate the column’s approach to flood. But column delta-pressure is more an inference of the column’s approach to flood than it is an actual measurement of it. As a consequence, delta pressure limits are established conservatively in order to operate in a regime where the column is never expected to flood. As a result, there is much “left on the table” when operating in such a regime, i.e. the capacity difference between controlling the column to an upper delta-pressure limit and controlling it to the actual hydraulic limit. The Flooding Predictor™, an innovative pattern recognition technology, controls columns at their actual hydraulic limit, which research shows leads to a throughput increase of over 6%. Controlling closer to the hydraulic limit also permits operation in a sweet spot of increased energy-efficiency. In this region of increased column loading, the Flooding Predictor is able to exploit the benefits of higher liquid

  7. CAD-CAM plates versus conventional fixation plates for primary mandibular reconstruction: A biomechanical in vitro analysis.

    Science.gov (United States)

    Rendenbach, Carsten; Sellenschloh, Kay; Gerbig, Lucca; Morlock, Michael M; Beck-Broichsitter, Benedicta; Smeets, Ralf; Heiland, Max; Huber, Gerd; Hanken, Henning

    2017-09-01

    CAD/CAM reconstruction plates have become a viable option for mandible reconstruction. The aim of this study was to determine whether CAD/CAM plates provide higher fatigue strength compared with conventional fixation systems. 1.0 mm miniplates, 2.0 mm conventional locking plates (DePuy Synthes, Umkirch, Germany), and 2.0 mm CAD/CAM plates (Materialise, Leuven, Belgium/DePuy Synthes) were used to reconstruct a polyurethane mandible model (Synbone, Malans, CH) with cortical and cancellous bone equivalents. Mastication was simulated via cyclic dynamic testing using a universal testing machine (MTS, Bionix, Eden Prairie, MN, USA) until material failure reached a rate of 1 Hz with increasing loads on the left side. No significant difference was found between the groups until a load of 300 N. At higher loads, vertical displacement differed increasingly, with a poorer performance of miniplates (p = 0.04). Plate breakage occurred in miniplates and conventional locking plates. Screw breakage was recorded as the primary failure mechanism in CAD/CAM plates. Stiffness was significantly higher with the CAD/CAM plates (p = 0.04). CAD/CAM plates and reconstruction plates provide higher fatigue strength than miniplates, and stiffness is highest in CAD/CAM systems. All tested fixation methods seem sufficiently stable for mandible reconstruction. Copyright © 2017 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  8. Coupled optical resonance laser locking.

    Science.gov (United States)

    Burd, S C; du Toit, P J W; Uys, H

    2014-10-20

    We have demonstrated simultaneous laser frequency stabilization of a UV and IR laser, to coupled transitions of ions in the same spectroscopic sample, by detecting only the absorption of the UV laser. Separate signals for locking the different lasers are obtained by modulating each laser at a different frequency and using lock-in detection of a single photodiode signal. Experimentally, we simultaneously lock a 369 nm and a 935 nm laser to the (2)S(1/2) → (2)(P(1/2) and (2)D(3/2) → (3)D([3/2]1/2) transitions, respectively, of Yb(+) ions generated in a hollow cathode discharge lamp. Stabilized lasers at these frequencies are required for cooling and trapping Yb(+) ions, used in quantum information and in high precision metrology experiments. This technique should be readily applicable to other ion and neutral atom systems requiring multiple stabilized lasers.

  9. Clinical effectiveness analysis of PHILOS locking plates and humeral head replacement for treatment of complex fractures of proximal humerus in elderly%PHILOS锁定钢板与人工肱骨头置换治疗老年复杂肱骨近端骨折的效果对比

    Institute of Scientific and Technical Information of China (English)

    张敏; 白鹏程; 张媺; 江建平; 王辉; 金绍林; 冯孝志; 周明

    2015-01-01

    Objective To analyze the effect of PHILOS locking plate fixation and the artificial humerus head replacement on proxi-mal complex humerus fracture. Methods The clinical data of 43 patients aged over 60 with three or four parts fractures in proximal humerus were retrospectively studied,including 32 cases of PHILOS group and 11 cases of artificial humerus head replacement group. Two groups were compared in operation time,surgical blood loss and NEER score and the incidence of postoperative complications. Results All patients obtained similar outpatient follow-up for 6~20 months with an average of 11. 63 months. There was no difference in operation time and blood loss of the two groups(P>0. 05). After treatment,according to NEER grading evaluation of curative effect,no obvious statistical significance difference existed between the two groups (P>0. 05). However,the postoperative complication rate of PHILOS group was higher than that of artificial humerus head replacement group;postoperative plate and acromion impingement occurred in 2 cases,screw through the shoulder joint in 2 cases,but there was no functional impact,and there was 1 case of displacement of the greater tuberosity postoperatively,1 case of humerus head necrosis,while there were no complications in artificial femoral head replacement group. Conclusion PHILOS or steel plate internal fixation and the artificial humerus head replacement can be used in the treatment of senile complex humeral proximal fractures. There are no obvious differences in the quality of life and shoulder joint function recovery,but the incidence of postoperative complications in artifi-cial humerus head replacement group is lower than that of PHILOS group.%目的:对比分析PHILOS锁定钢板内固定术与人工肱骨头置换术治疗老年复杂肱骨近端骨折的临床疗效。方法回顾性分析60岁以上老年肱骨近端三、四部分骨折患者43例临床资料,其中PHILOS组32例,人工肱骨头置换组11

  10. Strengthening of Steel Columns under Load: Torsional-Flexural Buckling

    Directory of Open Access Journals (Sweden)

    Martin Vild

    2016-01-01

    Full Text Available The paper presents experimental and numerical research into the strengthening of steel columns under load using welded plates. So far, the experimental research in this field has been limited mostly to flexural buckling of columns and the preload had low effect on the column load resistance. This paper focuses on the local buckling and torsional-flexural buckling of columns. Three sets of three columns each were tested. Two sets corresponding to the base section (D and strengthened section (E were tested without preloading and were used for comparison. Columns from set (F were first preloaded to the load corresponding to the half of the load resistance of the base section (D. Then the columns were strengthened and after they cooled, they were loaded to failure. The columns strengthened under load (F had similar average resistance as the columns welded without preloading (E, meaning the preload affects even members susceptible to local buckling and torsional-flexural buckling only slightly. This is the same behaviour as of the tested columns from previous research into flexural buckling. The study includes results gained from finite element models of the problem created in ANSYS software. The results obtained from the experiments and numerical simulations were compared.

  11. Locking mechanism for orthopedic braces

    Science.gov (United States)

    Chao, J. I.; Epps, C. H., Jr.

    1981-01-01

    An orthopedic brace locking mechanism is described which under standing or walking conditions cannot be unlocked, however under sitting conditions the mechanism can be simply unlocked so as to permit bending of the patient's knee. Other features of the device include: (1) the mechanism is rendered operable, and inoperable, dependent upon the relative inclination of the brace with respect to the ground; (2) the mechanism is automatically locked under standing or walking conditions and is manually unlocked under sitting conditions; and (3) the mechanism is light in weight and is relatively small in size.

  12. Behavior of reinforced concrete columns strengthened by steel jacket

    Directory of Open Access Journals (Sweden)

    Mahmoud F. Belal

    2015-08-01

    Full Text Available RC columns often need strengthening to increase their capacity to sustain the applied load. This research investigates the behavior of RC columns strengthened using steel jacket technique. Three variables were considered; shape of main strengthening system (using angles, C-sections and plates, size and number of batten plates. Behavior and failure load of the strengthened columns were experimentally investigated on seven specimens divided into two un-strengthened specimen and five strengthened ones. A finite element model was developed to study the behavior of these columns. The model was verified and tuned using the experimental results. The research demonstrated that the different strengthening schemes have a major impact on the column capacity. The size of the batten plates had significant effect on the failure load for specimens strengthened with angles, whereas the number of batten plates was more effective for specimens strengthened with C-channels. Then, by using finite element (F.E package ANSYS 12.0 [1] their behavior was investigated, analyzed and verified. Test result showed a good match between both experimental tests and F.E models.

  13. 肱骨近端角度变化对锁定钢板内固定治疗肱骨近端骨折预后的影响%Influence of the changes of proximal humeral angle on the prognosis of the proximal humeral fractures treated with locking plate

    Institute of Scientific and Technical Information of China (English)

    张云龙; 陈云丰; 陈圣宝; 芮碧宇; 张明; 薛培璘

    2015-01-01

    目的:探讨肱骨后倾角、颈干角变化对锁定钢板内固定治疗肱骨近端骨折预后的影响。方法2012年9月至2013年10月,采用肱骨近端锁定内固定系统(PHILOS)治疗52例肱骨近端骨折患者,其中38例获得12个月以上的随访,记录患者术后并发症并评估患者疼痛视觉模拟评分(VAS)及Constant‐Murley肩关节评分。所有患者术后3 d内行双侧肱骨全长CT检查,在三维CT 重建图像上测量双侧肱骨后倾角及颈干角。比较患侧与健侧肱骨后倾角和颈干角并将肱骨近端骨折患者分为后倾角增加组、后倾角减小组及颈干角增大组、颈干角减小组。结果患侧与健侧肱骨后倾角差异无统计学意义,但患侧肱骨颈干角显著大于健侧。末次随访时,肱骨颈干角增加组与减小组VAS评分、并发症发生率及Constant‐M urley肩关节评分均无统计学差异;肱骨后倾角减小组并发症发生率明显低于后倾角增大组,而Constant‐M urley肩关节评分显著高于后倾角增大组。结论与健侧相比,患侧肱骨颈干角改变对锁定钢板内固定患者预后影响不大,但肱骨后倾角较健侧增大是患者预后的危险因素之一。%Objective To explore the influence of the changes of humeral retroversion angle (HRA) and neck‐shaft angle (NSA ) on the prognosis of proximal humeral fractures treated with locking plate . Methods From September 2012 to October 2013 ,52 patients of proximal humeral fracture were treated with the proximal humeral internal locking system (PHILOS) ,and 38 patients received the follow‐up more than 12 months .During the follow‐up ,the Constant‐Murley shoulder score ,visual analogue scale (VAS) and complication rate were evaluated .All patients received the CT scanning on the bilateral whole humerus in 3 days after operation ,three‐dimensional CT reconstruction were applied for measuring HRA and NSA .The patients were divided

  14. Comparison of clinical efficacy of proximal femoral nail anti-rotatio and locking plate for proximal femoral fractures%髓内钉与近端锁定钢板治疗股骨近端骨折的对比研究

    Institute of Scientific and Technical Information of China (English)

    叶庆林; 邹华章; 罗春强; 梁桂泉; 卢志文

    2016-01-01

    目的探讨股骨近端螺旋刀片抗旋髓内钉( PFNA)和股骨近端锁定钢板( PFLCP)治疗股骨近端骨折患者的临床疗效并进行对比分析。方法笔者回顾性分析2010年3月~2014年3月采用PFNA和PFLCP法治疗股骨近端骨折70例的病例资料,PFNA内固定治疗40例,PFLCP内固定治疗30例。观察比较两组患者手术时间、术中透视时间、术中失血量、术后引流量以及Parker-Palmer评分的差异。结果所有患者随访6~9个月,平均8.9个月。末次随访时两种方法的Parker-Palmer评分差异无统计学意义( P>0.05)。两种方法的手术时间、术中透视时间、术中失血量、术后引流量以及Parker-Palmer评分的差异均无统计学意义(P>0.05),但PFNA组的术中透视时间明显短于PFLCP组。结论 PFNA和PFLCP均是治疗股骨近端骨折较好的内固定材料。%Objective To compare and analyze the clinical efficacy of proximal femoral nail anti-rotation (PFNA) and proximal femoral locking compression plate (PFLCP) in the treatment of proximal femoral fracture . Methods From Mar.2010 to Mar.2014,70 patients with proximal femoral fracture treated with PFNA and PFLCP were collected.All of these patients were randomly divided into PFNA group (40 cases) and PFLCP group (30 ca-ses).The operation time,intraoperative fluoroscopy time,intraoperative blood loss,postoperative drainage volume and Parker-Palmer score between these two groups were compared .Results All patients were followed up for 6-9 months,averaging 8.9 months.There was no significant difference in the intraoperative blood loss ,operative time, postoperative drainage volume and Parker-Palmer score between the two groups .But intraoperative fluoroscopy time of the PFNA group was shorter than that of the PFLCP group .Conclusion PFNA and PFLCP were both good in-ternal fixation materials for the treatment of proximal femoral fractures .