WorldWideScience

Sample records for distal protection devices

  1. Efficiency and safety of percuSurge distal protection device in acute ...

    African Journals Online (AJOL)

    user

    2011-04-25

    Apr 25, 2011 ... myocardial infarction. The long-term effects of the distal protection device are still in controversy. The enhanced myocardial efficacy and recovery by aspiration of liberated debris (EMERALD) trial failed to show the effectiveness of the distal protection device in patients with AMI (Yamada and Topol, 2000).

  2. Efficiency and safety of percuSurge distal protection device in acute ...

    African Journals Online (AJOL)

    Efficiency and safety of percuSurge distal protection device in acute myocardial infarction during emergent percutaneous coronary intervention treatment. XY Feng, HT Liu, Y Gao, X Gua, RF Xu, HC Wang, CX Li ...

  3. Extraction of challenging intracoronary thrombi: multi-device strategies using guide catheters, distal vascular protection devices and aspiration catheters.

    Science.gov (United States)

    Pornratanarangsi, Suwatchai; El-Jack, Seif S; Webster, Mark W I; McNab, Duncan; Stewart, James T; Ormiston, John A; Ruygrok, Peter N

    2008-09-01

    Patients with large intracoronary thrombi represent a difficult management problem for the interventional cardiologist. We report 10 cases of challenging thrombi treated percutaneously using varying combinations of deep guide catheter engagement, guide aspiration, dedicated catheter aspiration and withdrawal of a distal filter vascular protection device. These cases demonstrate interventional options which may be considered for such patients.

  4. Combined application of distal and proximal embolic protection devices in endovascular stenting for severe carotid artery stenosis

    Directory of Open Access Journals (Sweden)

    Zhi-hua DU

    2011-09-01

    Full Text Available Objective To analyze and summarize methods and experiences of combined application of distal and proximal embolic protection devices(EPD in endovascular stenting for severe carotid artery stenosis.Methods Five patients with severe stenosis of the common carotid artery or with extracranial segment of the internal carotid artery diagnosed through digital subtraction angiography(DSA from March to July 2010 were involved in the present study.All patients received carotid angioplasty and stenting(CAS,with a combination of distal and proximal EPD via the percutaneous femoral artery approach.Results The operation failed in one patient,whereas technical success with no intraoperative complication was achieved in four patients.The symptoms disappeared or improved in the four cases that achieved technical success.The follow-up duration was one to three months,and no cerebral ischemia was found.Conclusion CAS with the combined application of distal and proximal EPD in some special cases of carotid artery stenosis may surmount the shortage of single EPD,reduce the risk of intraoperative embolization,decrease the time of intraoperative endovascular inflow occlusion,and reduce high-risk operations.CAS may be used as an individualized treatment strategy for patients with carotid artery stenosis.

  5. Distal embolization during native vessel and vein graft coronary intervention with a vascular protection device: predictors of high-risk lesions.

    Science.gov (United States)

    El-Jack, Seif S; Suwatchai, Pornratanarangsi; Stewart, James T; Ruygrok, Peter N; Ormiston, John A; West, Teena; Webster, Mark W I

    2007-12-01

    We sought to define clinical and angiographic variables that may predict patients and lesions at increased risk for distal embolism during percutaneous intervention (PCI), as assessed by debris retrieval from a distal-protection filter device. Distal thrombo- and atheroembolism may contribute to periprocedural myocardial necrosis during PCI, which may in turn affect long-term outcomes. Distal protection devices have been used to reduce this occurrence with variable outcomes depending on lesion and patient subsets. 194 consecutive patients in whom the FilterWire(R) device (FW) [Boston Scientific Corp., Natick, MA] was used for native coronary vessel (n =129) or vein graft (n = 65) PCI were studied. FW debris was visually analyzed using a semi-quantitative grading score. Patients with "significant" debris (particles > or = 1 mm diameter) were compared with those with "nonsignificant" debris (no debris or particles <1 mm) with respect to clinical (age, gender, coronary disease risk factors, clinical presentation, periprocedural medications), and angiographic (vessel treated, vessel size, lesion length, lesion characteristics, angiographic thrombus and TIMI flow before and after PCI) variables. Significant debris was retrieved in 55% of patients, more frequently from vein graft (69%) than native vessel lesions (48%, p = 0.006). No clinical characteristics predicted significant debris retrieval. Angiographic predictors of significant debris by multivariate analysis were longer stent length and final TIMI flow <3 (p = 0.009 and 0.007, respectively). Longer stent length, likely reflecting increased lesion length and plaque burden, predicted significant distal embolism during PCI in native vessel and vein graft lesions, as assessed by debris collected in a distal vascular protection device. This suggests that use of vascular protection devices should be considered during PCI of long lesions.

  6. Reactor protection device

    International Nuclear Information System (INIS)

    Shida, Toichi; Hirose, Masao.

    1977-01-01

    Purpose: To prevent abrupt increase or decrease in the recycling flow rate by comparing output signals from controllers in each of the loops in the recycling flow rate control system to thereby lock the positions of fluid coupling scooping pipes or flow control valves corresponding to the groups generating abnormal signals. Constitution: The recycling flow rate is controlled by r.p.m. of a motor directly coupled with a recycling pump and the value of r.p.m. is in proportion to the generator frequency varied with the sliding operation of the fluid coupling in MG set. The sliding operation of the fluid coupling is adjusted by a scooping pipe driver. When the device is set to automatic operation, the output signal of the main controller is delivered to the recycling flow rate control system, the output signal of which is input to respective scooping pipe drivers. The loop output signals are supplied to an adder where the deviation signal between both of them are detected and the scooping pipe is locked if the set value is exceeded. (Yoshino, M.)

  7. Randomized comparison of distal protection versus conventional treatment in primary percutaneous coronary intervention: the drug elution and distal protection in ST-elevation myocardial infarction (DEDICATION) trial

    DEFF Research Database (Denmark)

    Kelbaek, Henning; Terkelsen, Christian J; Helqvist, Steffen

    2008-01-01

    OBJECTIVES: The purpose of this study was to evaluate the use of distal protection during percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI) in native coronary vessels. BACKGROUND: Embolization of material from the infarct-related lesion during PCI may......: The routine use of distal protection by a filterwire system during primary PCI does not seem to improve microvascular perfusion, limit infarct size, or reduce the occurrence of MACCE....

  8. Protective device for a reactor

    International Nuclear Information System (INIS)

    Neda, Toshikatsu.

    1976-01-01

    Object: To provide a protective device for a boiling water reactor which can prevent a neutron absorber from being fallen. Structure: The state whether a neutron absorber of a control rod is removed from the interior of a reactor or not can be judged by reading a neutron flux detector, and in the case where the neutron absorber is disengaged from a drive portion, an operator is informed thereof by an alarm or lamp, and in addition, removal of the control rod is restrained to prevent occurrence of trouble. (Ohara, T.)

  9. Ex-vivo release of Pipeline Embolization Device polytetrafluoroethylene (PTFE) sleeves for improved distal landing zone accuracy in-vivo: A technical note.

    Science.gov (United States)

    Griessenauer, Christoph J; Gupta, Raghav; Moore, Justin; Thomas, Ajith J; Ogilvy, Christopher S

    2016-12-01

    Distal landing zone accuracy is critical in some intracranial aneurysms treated with the Pipeline Embolization Device (PED), and delayed opening of the distal end of the device can complicate the procedure. Here, we report a technical nuance that facilitates accurate placement of the distal end of the PED by ex-vivo, pre-implantation release of the PED Flex polytetrafluoroethylene (PTFE) sleeves. The PED Flex is partially pushed out of the introducer sheath ex-vivo, pre-implantation until the distal PED opens entirely and the PTFE sleeves are located distal to the device. Without inverting the PTFE sleeves, the PED is carefully pulled back into the introducer sheath placing the PTFE sleeves inside the device. The PED is loaded into the microcatheter and advanced toward the site of implantation. When the PED is initially deployed and pushed out of the microcatheter, it opens immediately and provides an anchor for the remainder of the deployment process. We present a video (supplementary material) that illustrates the technique along with an illustrative case. Ex-vivo, pre-implantation release of the PTFE sleeves is an option in aneurysm treatment where distal landing accuracy is critical. Even without the protection of the PTFE sleeves, our clinical observation shows that the PED can be advanced safely through the microcatheter in selected cases. © The Author(s) 2016.

  10. [Intramaxillary devices of molar distalization on fixed appliance and with aligners].

    Science.gov (United States)

    Dallel, Ines; Bergeyron, Patrice; Chok, Ameni; Tobji, Samir; Ben Amor, Adel

    2017-12-01

    Class II malocclusion is a dysmorphosis that can result from different skeletal and/or alveolar components of maxillary and/or mandibular origin. In dental class II cases due to mesial drift of the maxillary molars, it is sometimes interesting to retract the maxillary molars, in order to avoid in certain situations extractions of premolars. To this end, several devices have been described in the literature. The most recent intraoral devices allow a more controlled correction, and no longer require cooperation from the patient. In addition, in a number of cases of distalization, aligners now offer a useful therapeutic option since they are both esthetic and easy-to-use. In this study, we carried out a review of the various studies in the literature describing intra-oral distalization of the maxillary molars in the multi-bracket technique as well as using aligners, with a clinical illustration of a Class II case treated by aligners. © EDP Sciences, SFODF, 2017.

  11. Arthroscopic Treatment of Comminuted Distal Clavicle Fractures (Latarjet Fractures) Using 2 Double-Button Devices

    Science.gov (United States)

    Pujol, Nicolas; Desmoineaux, Pierre; Boisrenoult, Philippe; Beaufils, Philippe

    2013-01-01

    Complex distal clavicle fractures associated with a rupture of the coracoclavicular ligaments (Latarjet fractures) can result in delayed union or nonunion. There is no standard treatment for a clavicle fracture. This report introduces an arthroscopic technique for treating distal clavicle fractures associated with ruptured coracoclavicular ligament using 2 double-button devices. By use of posterior and anterior standard arthroscopic portals, the base of the coracoid process is exposed through the rotator interval. A 4-mm hole is drilled through the clavicle and the coracoid process with a specific ancillary drill guide. The first button is pushed through both holes down the coracoid process. The device is tightened, and the second button is fixed on top of the clavicle, allowing reduction and fixation of the proximal part of the fracture. Then, the undersurface of the lateral clavicle is dissected through standard posterior and lateral subacromial approaches. The inferior clavicle fragment is reduced and fixed to the clavicle body by a double button fixed down and at the top of the clavicle. With this technique, the arthroscopic treatment of distal clavicle fracture has been extended to comminuted fractures. PMID:23767010

  12. Evaluation of proximal protection devices during carotid artery stenting as the first choice for embolic protection.

    Science.gov (United States)

    Hornung, Marius; Bertog, Stefan C; Franke, Jennifer; Id, Dani; Grunwald, Iris; Sievert, Horst

    2015-03-01

    To assess the use of proximal protection devices in consecutive patients as the preferred means of cerebral embolic protection for primary carotid stenting. This was a prospective single-centre study to evaluate the technical and clinical success of proximal protection devices as the first choice for embolic protection in symptomatic (≥50%) and asymptomatic (≥70%) carotid stenosis. Proximal protection devices were used for embolic protection in 124 consecutive patients. No patients were excluded for anatomical reasons. The GORE Flow Reversal System (W.L. Gore, Flagstaff, AZ, USA) was used in 92 patients, and the Mo.Ma Ultra device (Medtronic, Minneapolis, MN, USA) in 32 patients. Follow-up duration was 30 days. Mean age was 71±8 years. Seventy-five percent of patients were male (n=93). Twenty-six of 124 (21%) treated stenoses were symptomatic. Technical success was achieved in 122 of 124 cases (98%). Due to anatomical conditions, in two patients flow reversal could not be established. In both cases additional distal filter devices were used. Carotid stenting was successful in 124 lesions (100%). Ten patients (8.1%) had contraindications to flow reversal (three high-grade ostial stenoses of the external carotid artery, seven contralateral occlusions of the internal carotid artery) in none of whom complications occurred. There were no procedural neurologic events. Within 30 days of follow-up, one patient had an ischaemic stroke (on day 11). Proximal protection is a safe method as the first choice for embolic protection. It can be used with a high rate of technical success.

  13. Evaluation of the Stryker S2 IM Nail Distal Targeting Device for reduction of radiation exposure: a case series study.

    Science.gov (United States)

    Anastopoulos, George; Ntagiopoulos, Panagiotis G; Chissas, Dionisios; Loupasis, George; Asimakopoulos, Antonios; Athanaselis, Eustratios; Megas, Panagiotis

    2008-10-01

    Distal locking is one challenging step during intramedullary nailing of femoral shaft fractures that can lead to an increase of radiation exposure. In the present study, the authors describe a technique for the distal locking of femoral nails, implementing a new targeting device in an attempt to reduce radiation exposure and operational time. Over a 2-year period, 127 consecutive cases of femoral shaft fractures were included in the study. All cases were treated with nailing of femoral shaft fractures with an unslotted reamed antegrade femoral nail and distal locking was performed with the use of a proximally mounted aiming device. Mean duration of the procedure was 63.5 18.1 min while the duration for distal locking was 6.6 +/- 2.6 min. In all successful cases, exposure from intraoperative fluoroscopy was 17.2 +/- 7.4 s for the whole operative procedure, and for distal locking was 2 shots, 1.35 s (range, 0.9-2.2 s) and 1.9 mGy (range, 1.1-2.9 mGy). Five cases (3.9%) were unsuccessful, but overall no intraoperative complications were encountered from the application of this technique. The ability of the device to correspond to the level of nail deformation and to properly identify the distal holes, reduced exposure to radiation compared to other published reports, and should be considered as a valuable tool for distal locking of femoral fractures.

  14. Device Data Protection in Mobile Healthcare Applications

    Science.gov (United States)

    Weerasinghe, Dasun; Rajarajan, Muttukrishnan; Rakocevic, Veselin

    The rapid growth in mobile technology makes the delivery of healthcare data and services on mobile phones a reality. However, the healthcare data is very sensitive and has to be protected against unauthorized access. While most of the development work on security of mobile healthcare today focuses on the data encryption and secure authentication in remote servers, protection of data on the mobile device itself has gained very little attention. This paper analyses the requirements and the architecture for a secure mobile capsule, specially designed to protect the data that is already on the device. The capsule is a downloadable software agent with additional functionalities to enable secure external communication with healthcare service providers, network operators and other relevant communication parties.

  15. Developing biomedical devices design, innovation and protection

    CERN Document Server

    Andreoni, Giuseppe; Colombo, Barbara

    2013-01-01

    During the past two decades incredible progress has been achieved in the instruments and devices used in the biomedical field. This progress stems from continuous scientific research that has taken advantage of many findings and advances in technology made available by universities and industry. Innovation is the key word, and in this context legal protection and intellectual property rights (IPR) are of crucial importance. This book provides students and practitioners with the fundamentals for designing biomedical devices and explains basic design principles. Furthermore, as an aid to the dev

  16. Single-incision laparoscopic distal gastrectomy for early gastric cancer through a homemade single port access device.

    Science.gov (United States)

    Jiang, Zhi-Wei; Zhang, Shu; Wang, Gang; Zhao, Kun; Liu, Jiang; Ning, Li; Li, Jieshou

    2015-01-01

    We presented a series of single-incision laparoscopic distal gastrectomies for early gastric cancer patients through a type of homemade single port access device and some other conventional laparoscopic instruments. A single-incision laparoscopic distal gastrectomy with D1 + α lymph node dissection was performed on a 46 years old male patient who had an early gastric cancer. This single port access device has facilitated the conventional laparoscopic instruments to accomplish the surgery and we made in only 6 minutes. Total operating time for this surgery was 240 minutes. During the operation, there were about 100 milliliters of blood loss, and 17 lymph-nodes were retrieved. This homemade single port access device shows its superiority in economy and convenience for complex single-incision surgeries. Single-incision laparoscopic distal gastrectomy for early gastric cancer can be conducted by experienced laparoscopic surgeons. Fully take advantage of both SILS and fast track surgery plan can bring to successful surgeries with minimal postoperative pain, quicker mobilization, early recovery of intestinal function, and better cosmesis effect for the patients.

  17. Microprocessor protection devices: The present and the future

    Directory of Open Access Journals (Sweden)

    Gurevich Vladimir

    2008-01-01

    Full Text Available Paper presents the analysis of the basic constructive disadvantages of the present day microprocessor-based protective devices (MBR and offers the basic principles for creating a new MBR that can be used in newly constructed devices.

  18. Physical limitations of semiconductor devices defects, reliability and esd protection

    CERN Document Server

    Vashchenko, V A

    2008-01-01

    Provides an important link between the theoretical knowledge in the field of non-linier physics and practical application problems in microelectronics. This title focuses on power semiconductor devices and self-triggering pulsed power devices for ESD protection clamps.

  19. Torque shudder protection device and method

    Science.gov (United States)

    King, R.D.; Doncker, R.W.A.A. De.; Szczesny, P.M.

    1997-03-11

    A torque shudder protection device for an induction machine includes a flux command generator for supplying a steady state flux command and a torque shudder detector for supplying a status including a negative status to indicate a lack of torque shudder and a positive status to indicate a presence of torque shudder. A flux adapter uses the steady state flux command and the status to supply a present flux command identical to the steady state flux command for a negative status and different from the steady state flux command for a positive status. A limiter can receive the present flux command, prevent the present flux command from exceeding a predetermined maximum flux command magnitude, and supply the present flux command to a field oriented controller. After determining a critical electrical excitation frequency at which a torque shudder occurs for the induction machine, a flux adjuster can monitor the electrical excitation frequency of the induction machine and adjust a flux command to prevent the monitored electrical excitation frequency from reaching the critical electrical excitation frequency. 5 figs.

  20. 30 CFR 75.1723 - Stationary grinding machines; protective devices.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Stationary grinding machines; protective devices. 75.1723 Section 75.1723 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF....1723 Stationary grinding machines; protective devices. (a) Stationary grinding machines other than...

  1. Power supply devices and systems of relay protection

    CERN Document Server

    Gurevich, Vladimir

    2013-01-01

    Power Supply Devices and Systems of Relay Protection brings relay protection and electrical power engineers a single, concentrated source of information on auxiliary power supply systems and devices. The book also tackles specific problems and solutions of relay protection power supply systems and devices, which are often not dealt with in the literature. The author, an experienced engineer with more than 100 patents, draws on his own experience to offer practical, tested advice to readers. A Guide to Relay Protection Power Supply for Engineers and Technicians The first chapter reviews the ele

  2. Overload protection device for pulsed electric systems

    International Nuclear Information System (INIS)

    Glushchenko, V.G.; Kurskov, I.A.; Semina, R.S.

    1976-01-01

    Results of pulsed electric system protection development from effective pulse current overload depending on pulse duration are described. An integrating circuit, charge resistance of which is connected in parallel with a stabilitron, is used in a protection diagram. Given were time responses of overload protection of an output lens of slow root particle extraction channel from synchrophasotron; the responses have been obtained by the experimental and calculation methods

  3. [Infection risk and personal protective devices].

    Science.gov (United States)

    Scalzini, A; Gattuso, G; Burato, E

    2005-01-01

    The Aa discuss the evidence and recommendations for the use of personal protective equipment by health care practitioners in general care settings; the use of aprons, gowns, gloves, eye protections, face masks is valutated on the basis of an assessment of the risk of transmission of microrganisms to the patient or from the patient to health care practitioners. The primary uses of personal protective equipment are to protect staff and reduce opportunities for transmission of microrganisms in hospitals. A trend to eliminate the unnecessary wearing of aprons, gowns and masks in general care settings has evolved over the past twenty years due to the absence of evidence that they are effective.

  4. Neutron protection device for radioactive products

    International Nuclear Information System (INIS)

    1983-01-01

    This device is intended to cover the external surface of a container for radioactive materials. It comprises essentially a neutron absorbing material wrapping the container. After the invention the device is composed by a plurality of identical elements made with an incurved strip of metallic sheet. These elements are regularly arranged around the container and welded to form juxtaposed and closed cavities containing the neutron absorber. Application is made to containers for the storage or the transport of nuclear fuels [fr

  5. Methodology to Assess Field of View of Maxillofacial Protective Devices

    Science.gov (United States)

    2012-11-01

    USAARL Report No. 2013-05 Methodology to Assess Field of View of Maxillofacial Protective Devices By Jose E. Cap6-Aponte William McLean Josue...13-11-2012 Final Methodology to Assess Field of View of Maxillofacial Protective Devices Jose E. Capo-Aponte William McLean Josue Sosa Steve Martin...Scott Street Fort Detrick, MD 21702 USAMRMC Approved for public release; distribution unlimited. The frequency of maxillofacial battlefield injuries

  6. Ion manipulation device with electrical breakdown protection

    Science.gov (United States)

    Chen, Tsung-Chi; Tang, Keqi; Ibrahim, Yehia M; Smith, Richard D; Anderson, Gordon A; Baker, Erin M

    2014-12-02

    An ion manipulation method and device is disclosed. The device includes a pair of substantially parallel surfaces. An array of inner electrodes is contained within, and extends substantially along the length of, each parallel surface. The device includes a first outer array of electrodes and a second outer array of electrodes. Each outer array of electrodes is positioned on either side of the inner electrodes, and is contained within and extends substantially along the length of each parallel surface. A DC voltage is applied to the first and second outer array of electrodes. A RF voltage, with a superimposed electric field, is applied to the inner electrodes by applying the DC voltages to each electrode. Ions either move between the parallel surfaces within an ion confinement area or along paths in the direction of the electric field, or can be trapped in the ion confinement area. The surfaces are housed in a chamber, and at least one electrically insulative shield is coupled to an inner surface of the chamber for increasing a mean-free-path between two adjacent electrodes in the chamber.

  7. Automatic coordination of protection devices in distribution system

    International Nuclear Information System (INIS)

    Comassetto, L.; Bernardon, D.P.; Canha, L.N.; Abaide, A.R.

    2008-01-01

    Among the several components of distribution systems, protection devices present a fundamental importance, since they aim at keeping the physical integrity not only of the system equipment, but also of the electricians' team and the population in general. The existing tools today in the market that carry out the making of protection studies basically draw curves, and need direct user's interference for the protection devices adjustment and coordination analyses of selectivity, being susceptible to the user's mistakes and not always considering the best technical and economical application. In Brazil, the correct application of the protection devices demand a high amount of time, being extremely laborious due to the great number of devices (around 200 devices), besides the very dynamic behaviour of distribution networks and the need for constant system expansion. This article presents a computational tool developed with the objective of automatically determining the adjustments of all protection devices in the distribution networks to obtain the best technical application, optimizing its performance and making easier protection studies. (author)

  8. 30 CFR 77.401 - Stationary grinding machines; protective devices.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Stationary grinding machines; protective... OF UNDERGROUND COAL MINES Safeguards for Mechanical Equipment § 77.401 Stationary grinding machines; protective devices. (a) Stationary grinding machines other than special bit grinders shall be equipped with...

  9. Overcurrent protection device for neutral beam sources

    International Nuclear Information System (INIS)

    Praeg, W.F.

    1983-01-01

    Electrical loads connected to capacitance elements in high voltage direct current systems are protected from damage caused by capacitance discharge overcurrents by connecting a longitudinal inductor between the capacitance element and the load. The inductor comprises a bifilar winding wound about a magnetic core, which forms an incomplete magnetic circuit. A diode is connected across a portion of the bifilar winding. Most of the energy discharged from the capacitance element is stored in the inductor and then dissipated, away from the load, in an L-R circuit comprising the diode and the coil winding. Multiple high voltage circuits having capacitance elements may be connected to loads through bifilar windings all wound about the aforementioned magnetic core

  10. Device for protecting deformations of reactor cores

    International Nuclear Information System (INIS)

    Kato, Yasuyoshi; Urushihara, Hiroshi.

    1975-01-01

    Object: To provide a fluid pressure cylinder, which is operated according to change in temperature of coolant for a reactor to restrain or release a core, to simply and effectively protect deformation of the core. Structure: A closed fluid pressure cylinder interiorly filled with suitable fluid is disposed in peripherally equally spaced relation in an annular space between a core barrel of a reactor and a reactor vessel. A piston is mounted in fluid-tight fashion in a plurality of piston openings made in the cylinder, the piston being slidably moved according to expansion and contraction of the fluid filled in the cylinder. The piston has a movable frame mounted at the foremost end thereof, the movable frame being moved integral with the piston, and the surface opposite the mount thereof biasing the outermost peripheral surface of the core. (Kamimura, M.)

  11. Investigation of surge protective devices operation of a wind generator

    International Nuclear Information System (INIS)

    Dimitrov, D.; Vasileva, M.

    2008-01-01

    The interest to the investments in a wind energetics increases in the last years. The wind energetics is the fastest developing direction in the energetics in global scale. The wind energy is more attractive because its prices are lower in comparison of the other technologies for generating energy. The right choice of the surge protective devices has the important meaning on building and exploitation of the wind generators. The aim of this paper is investigation of the surge protective devices operation when they are installation to a wind generator. (authors)

  12. Carotid stenting with and without protection devices: should protection be used in all patients?

    Science.gov (United States)

    Ohki, T; Veith, F J

    2000-06-01

    Embolic events that result in neurological deficits have been the most significant concern regarding carotid bifurcation stenting. Ex vivo carotid angioplasty studies using human carotid plaques have shown that embolic particles were released from all specimens. In addition, transcranial Doppler studies have confirmed the presence of multiple emboli in the middle cerebral artery during carotid stenting. Preliminary experience with the use of brain protection devices for carotid stenting have shown encouraging results in terms of safety and efficacy. Moreover, embolic particles have been recovered from all cases in which protection devices have been used. We provide the rationale for routine use of these protection devices and also review the various protection devices on the horizon.

  13. Method of and device for querying of protected structured data

    NARCIS (Netherlands)

    Brinkman, Richard; Doumen, J.M.; Jonker, Willem; Schoenmakers, B.

    Method of and device for querying of protected data structured in the form of a tree. A corresponding tree of node polynomials is constructed such that each node polynomial evaluates to zero for an input equal to an identifier assigned to a node name occurring in a branch of the data tree starting

  14. Method of and device for querying of protected structured data

    NARCIS (Netherlands)

    Jonker, Willem; Brinkman, Richard; Doumen, J.M.; Schoenmakers, Berry

    2005-01-01

    Method of and device for querying of protected data structured in the form of a tree. A corresponding tree of node polynomials is constructed such that each node polynomial evaluates to zero for an input equal to an identifier assigned to a node name occurring in a branch of the data tree starting

  15. Protective device for the head of a gushing well

    Energy Technology Data Exchange (ETDEWEB)

    Kutepov, A.I.; Prokopov, O.I.

    1982-01-01

    A protective device is proposed for the head of a gushing well. It includes a housing with assembly for attachment to the pipe string. It is distinguished by the fact that in order to simplify insulation of the device at the well head and to improve its reliable operation, the housing is made in the form of sections, each of which is made in the form of a crimped sleeve with upper and lower flanges on the ends. The lower flange is equipped with a guide bushing installed inside the sleeve and clamps for attaching it in relation to the upper flange.

  16. Using Protection Layers for a 2-Photon Water Splitting Device

    DEFF Research Database (Denmark)

    Seger, Brian; Mei, Bastian Timo; Frydendal, Rasmus

    2015-01-01

    The 2-photon tandem device for photocatalytic water splitting has been theoretically shown to provide a higher efficiency than a single photon device(1). This increased efficiency can be achieved by having one material optimized to absorb high energy photons (large bandgap) and another material...... optimized to absorb low energy photons (small bandgap). To a large degree this approach has been hindered by corrosion issues. In this talk I will first discuss how our computational screening of 2,400 materials showed that very few materials can efficiently absorb light without corroding in water splitting...... conditions.(2) I will follow this up by discussing how protection layers bypass the corrosion issue by creating a buffer layer.(3) Finally I will show how we integrated a photocatalyst/protection layer/(co-catalyst) scheme to produce highly efficient H2 evolution photocathodes and O2 evolution photoanodes.(3...

  17. Device for the burst protection of nuclear reactor pressure vessels

    International Nuclear Information System (INIS)

    Daublebsky, P.

    1976-01-01

    The burst protection device has a hood over top and bottom of the pressure vessel with superimposed hinged supports lying in their turn against supporting rings which are connected with each other by vertical bracing. It is proposed to place an intermediate layer between hoods and vertical bracing absorbing thermal stresses, i.e. deforming plastically with gradually increasing pressure, but behaving like a rigid body in the case of shock loads. As a material lead e.g. is proposed. (UWI) [de

  18. Fire protection device for LMFBR spent fuel shipping casks

    International Nuclear Information System (INIS)

    Moss, M.; Heckman, R.C.

    1977-08-01

    This report describes the analysis and experimental evaluation of a device to provide fire protection for a shipping cask used to transport liquid metal fast breeder reactor (LMFBR) fuel rods. Thermal analyses of various fire protection schemes were conducted by means of the finite difference code, CINDA. The choice of materials for the cask body was determined to be less important than the dimensions and number of cooling fins attached to the cask. Of several protection methods considered, radiation/convection shields between the cooling fins looked most attractive; these were tested on a quarter-scale cask model. The shields consisted of bimetallic bands which expanded when heated, blocking the fire, and retracted when cooled. This automatic reversibility would allow the fins to dissipate internally generated heat of a full-size cask once the fire was out. Tests showed that, even in an asymmetric fire exposure, the bands expanded to provide protection to the cask. The directly exposed surface of the cask model, protected this way, reached a temperature of only 180 0 C compared with 295 0 C in the unprotected state, when subjected to a butane flame for 0.5 h at a distance of 15 cm. Greater relative effectiveness could be expected in an engulfing fire in which the bands would expand more symmetrically

  19. Respiratory protective device design using control system techniques

    Science.gov (United States)

    Burgess, W. A.; Yankovich, D.

    1972-01-01

    The feasibility of a control system analysis approach to provide a design base for respiratory protective devices is considered. A system design approach requires that all functions and components of the system be mathematically identified in a model of the RPD. The mathematical notations describe the operation of the components as closely as possible. The individual component mathematical descriptions are then combined to describe the complete RPD. Finally, analysis of the mathematical notation by control system theory is used to derive compensating component values that force the system to operate in a stable and predictable manner.

  20. Weapon and Sighting System Compatibility Assessment for Prototype Maxillofacial Protection Devices

    Science.gov (United States)

    2013-03-01

    Weapon and Sighting System Compatibility Assessment for Prototype Maxillofacial Protection Devices by Frank Morelli and William H. Harper...ARL-TR-6367 March 2013 Weapon and Sighting System Compatibility Assessment for Prototype Maxillofacial Protection Devices Frank Morelli...Compatibility Assessment for Prototype Maxillofacial Protection Devices 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S

  1. Impact of hearing protection devices on sound localization performance.

    Science.gov (United States)

    Zimpfer, Véronique; Sarafian, David

    2014-01-01

    Hearing Protection Devices (HPDs) can protect the ear against loud potentially damaging sounds while allowing lower-level sounds such as speech to be perceived. However, the impact of these devices on the ability to localize sound sources is not well known. To address this question, we propose two different methods: one behavioral and one dealing with acoustical measurements. For the behavioral method, sound localization performance was measured with, and without, HPDs on 20 listeners. Five HPDs, including both passive (non-linear attenuation) and three active (talk-through) systems were evaluated. The results showed a significant increase in localization errors, especially front-back and up-down confusions relative to the "naked ear" test condition for all of the systems tested, especially for the talk-through headphone system. For the acoustic measurement method, Head-Related Transfer Functions (HRTFs) were measured on an artificial head both without, and with the HPDs in place. The effects of the HPDs on the spectral cues for the localization of different sound sources in the horizontal plane were analyzed. Alterations of the Interaural Spectral Difference (ISD) cues were identified, which could explain the observed increase in front-back confusions caused by the talk-through headphone protectors.

  2. Impact of hearing protection devices on sound localization performance

    Directory of Open Access Journals (Sweden)

    Veronique eZIMPFER

    2014-06-01

    Full Text Available Hearing Protection Devices (HPDs can protect the ear against loud potentially damaging sounds while allowing lower-level sounds such as speech to be perceived. However, the impact of these devices on the ability to localize sound sources is not well known. To address this question, we propose two different methods: one behavioral and one dealing with acoustical measurements. For the behavioral method, sound localization performance was measured with, and without, HPDs on 20 listeners. Five HPDs, including both passive (nonlinear attenuation and three active (talk-through systems were evaluated. The results showed a significant increase in localization errors, especially front-back and up-down confusions relative to the naked ear test condition for all of the systems tested, especially for the talk-through headphone system. For the acoustic measurement method, Head-Related Transfer Functions (HRTFs were measured on an artificial head both without, and with the HPDs in place. The effects of the HPDs on the spectral cues for the localization of different sound sources in the horizontal plane were analyzed. Alterations of the Interaural Spectral Difference (ISD cues were identified, which could explain the observed increase in front-back confusions caused by the talk-through headphone protectors.

  3. Negative pressure wound therapy using a portable single-use device for free skin grafts on the distal extremity in seven dogs.

    Science.gov (United States)

    Miller, A J; Cashmore, R G; Marchevsky, A M; Havlicek, M; Brown, P M; Fearnside, S M

    2016-09-01

    Retrospective study to describe clinical experience with a portable single-use negative pressure wound therapy device after application of full-thickness meshed skin grafts to wounds on the distal extremities of seven dogs. Seven dogs were treated with portable NPWT after receiving skin grafts; six as the result of tumour resection and one for traumatic injury. Medical records were reviewed and data recorded on patient signalment, cause and location of wound, surgical technique, application and maintenance of portable NPWT, graft survival and outcome, and complications encountered with the system. NPWT was provided for between 4 and 7 days. Five patients were discharged from hospital during the treatment period. Application and maintenance of the portable device was technically easy and no major complications were encountered. Minor complications consisted of fluid accumulation in the evacuation tubing. All dogs achieved 100% graft survival. Application and maintenance of the portable device was technically straightforward. All dogs receiving portable NPWT after transfer of a free skin graft to the distal extremity had a successful outcome. © 2016 Australian Veterinary Association.

  4. Safety and effectiveness of the INVATEC MO.MA proximal cerebral protection device during carotid artery stenting: results from the ARMOUR pivotal trial.

    Science.gov (United States)

    Ansel, Gary M; Hopkins, L Nelson; Jaff, Michael R; Rubino, Paolo; Bacharach, J Michael; Scheinert, Dierk; Myla, Subbarao; Das, Tony; Cremonesi, Alberto

    2010-07-01

    The multicenter ARMOUR (ProximAl PRotection with the MO.MA Device DUring CaRotid Stenting) trial evaluated the 30-day safety and effectiveness of the MO.MA Proximal Cerebral Protection Device (Invatec, Roncadelle, Italy) utilized to treat high surgical risk patients undergoing carotid artery stenting (CAS). Distal embolic protection devices (EPD) have been traditionally utilized during CAS. The MO.MA device acts as a balloon occlusion "endovascular clamping" system to achieve cerebral protection prior to crossing the carotid stenosis. This prospective registry enrolled 262 subjects, 37 roll-in and 225 pivotal subjects evaluated with intention to treat (ITT) from September 2007 to February 2009. Subjects underwent CAS using the MO.MA device. The primary endpoint, myocardial infarction, stroke, or death through 30 days (30-day major adverse cardiac and cerebrovascular events [MACCE]) was compared to a performance goal of 13% derived from trials utilizing distal EPD. For the ITT population, the mean age was 74.7 years with 66.7% of the cohort being male. Symptomatic patients comprised 15.1% and 28.9% were octogenarians. Device success was 98.2% and procedural success was 93.2%. The 30-day MACCE rate was 2.7% [95% CI (1.0-5.8%)] with a 30-day major stroke rate of 0.9%. No symptomatic patient suffered a stroke during this trial. The ARMOUR trial demonstrated that the MO.MA(R) Proximal Cerebral Protection Device is safe and effective for high surgical risk patients undergoing CAS. The absence of stroke in symptomatic patients is the lowest rate reported in any independently adjudicated prospective multicenter registry trial to date. (c) 2010 Wiley-Liss, Inc.

  5. Cerebral ischemic lesions detected with diffusion-weighted magnetic resonance imaging after carotid artery stenting: Comparison of several anti-embolic protection devices.

    Science.gov (United States)

    Taha, Mahmoud M; Maeda, Masayuki; Sakaida, Hiroshi; Kawaguchi, Kenji; Toma, Naoki; Yamamoto, Akitaka; Hirose, Tomofumi; Miura, Youichi; Fujimoto, Masashi; Matsushima, Satoshi; Taki, Waro

    2009-09-01

    Distal embolism is an important periprocedural technical complication with carotid angioplasty and carotid artery stenting (CAS). We evaluated the safety and efficacy of protection devices used during CAS by detecting new cerebral ischemic lesions using diffusion-weighted magnetic resonance imaging in 95 patients who underwent 98 CAS procedures: 34 using single PercuSurge GuardWire, 31 using double balloon protection, 15 using proximal flow reverse protection devices, 14 using Naviballoon, and 4 using filter anti-embolic devices. Diffusion-weighted imaging was performed preoperatively and postoperatively to evaluate the presence of any new embolic cerebral lesions. Postoperative diffusion-weighted imaging revealed 117 new ischemic lesions. Three patients had new ischemic stroke, two minor and one major, all ipsilateral to the treated carotid artery. The remaining patients had clinically silent ischemia. The incidence of new embolic lesions was lower using the proximal flow reverse protection device than with the double balloon protection (33% vs. 48.4%), but the volume of ipsilateral new ischemic lesions per patient was 136.6 mm(3) vs. 86.9 mm(3), respectively. Neuroprotection with Naviballoon yielded ipsilateral lesions of large volume (86.6 mm(3)) and higher number (5.7 lesions per patient) than using the filter anti-embolic device (34.8 mm(3) and 1 lesion per patient). New cerebral ischemic lesions after neuroprotected CAS are usually silent. The lower incidence of distal ischemia using proximal flow reverse and double balloon protection devices is limited by the larger volume and higher number of ischemic lesions.

  6. Cerebral ischemic lesions detected with diffusion-weighted magnetic resonance imaging after carotid artery stenting. Comparison of several anti-embolic protection devices

    International Nuclear Information System (INIS)

    Taha, M.M.; Maeda, Masayuki; Sakaida, Hiroshi

    2009-01-01

    Distal embolism is an important periprocedural technical complication with carotid angioplasty and carotid artery stenting (CAS). We evaluated the safety and efficacy of protection devices used during CAS by detecting new cerebral ischemic lesions using diffusion-weighted magnetic resonance imaging in 95 patients who underwent 98 CAS procedures: 34 using single PercuSurge GuardWire, 31 using double balloon protection, 15 using proximal flow reverse protection devices, 14 using Naviballoon, and 4 using filter anti-embolic devices. Diffusion-weighted imaging was performed preoperatively and postoperatively to evaluate the presence of any new embolic cerebral lesions. Postoperative diffusion-weighted imaging revealed 117 new ischemic lesions. Three patients had new ischemic stroke, two minor and one major, all ipsilateral to the treated carotid artery. The remaining patients had clinically silent ischemia. The incidence of new embolic lesions was lower using the proximal flow reverse protection device than with the double balloon protection (33% vs. 48.4%), but the volume of ipsilateral new ischemic lesions per patient was 136.6 mm 3 vs. 86.9 mm 3 , respectively. Neuroprotection with Naviballoon yielded ipsilateral lesions of large volume (86.6 mm 3 ) and higher number (5.7 lesions per patient) than using the filter anti-embolic device (34.8 mm 3 and 1 lesion per patient). New cerebral ischemic lesions after neuroprotected CAS are usually silent. The lower incidence of distal ischemia using proximal flow reverse and double balloon protection devices is limited by the larger volume and higher number of ischemic lesions. (author)

  7. Aging assessment of surge protective devices in nuclear power plants

    International Nuclear Information System (INIS)

    Davis, J.F.; Subudhi, M.; Carroll, D.P.

    1996-01-01

    An assessment was performed to determine the effects of aging on the performance and availability of surge protective devices (SPDs), used in electrical power and control systems in nuclear power plants. Although SPDs have not been classified as safety-related, they are risk-important because they can minimize the initiating event frequencies associated with loss of offsite power and reactor trips. Conversely, their failure due to age might cause some of those initiating events, e.g., through short circuit failure modes, or by allowing deterioration of the safety-related component(s) they are protecting from overvoltages, perhaps preventing a reactor trip, from an open circuit failure mode. From the data evaluated during 1980--1994, it was found that failures of surge arresters and suppressers by short circuits were neither a significant risk nor safety concern, and there were no failures of surge suppressers preventing a reactor trip. Simulations, using the ElectroMagnetic Transients Program (EMTP) were performed to determine the adequacy of high voltage surge arresters

  8. Aging assessment of surge protective devices in nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Davis, J.F.; Subudhi, M. [Brookhaven National Lab., Upton, NY (United States); Carroll, D.P. [Florida Univ., Gainesville, FL (United States)

    1996-01-01

    An assessment was performed to determine the effects of aging on the performance and availability of surge protective devices (SPDs), used in electrical power and control systems in nuclear power plants. Although SPDs have not been classified as safety-related, they are risk-important because they can minimize the initiating event frequencies associated with loss of offsite power and reactor trips. Conversely, their failure due to age might cause some of those initiating events, e.g., through short circuit failure modes, or by allowing deterioration of the safety-related component(s) they are protecting from overvoltages, perhaps preventing a reactor trip, from an open circuit failure mode. From the data evaluated during 1980--1994, it was found that failures of surge arresters and suppressers by short circuits were neither a significant risk nor safety concern, and there were no failures of surge suppressers preventing a reactor trip. Simulations, using the ElectroMagnetic Transients Program (EMTP) were performed to determine the adequacy of high voltage surge arresters.

  9. Relationship Between the Elevated Muscle FDG Uptake in the Distal Upper Extremities on PET/CT Scan and Prescan Utilization of Mobile Devices in Young Patients.

    Science.gov (United States)

    Bai, Xia; Wang, Xuemei; Zhuang, Hongming

    2018-03-01

    It is common to notice increased FDG activity in the muscles of the forearms or hands on PET/CT images. The purpose of this study was to determine relationship between the prevalence of increased FDG activity in the forearms or hands and using mobile devices prior to the FDG PET/CT study. A total of 443 young patients with ages between 5 and 19 years who underwent FDG PET/CT scan were included in this retrospective analysis. All patients had FDG PET/CT with their arms within the field of views. The images were reviewed for elevated activity in the muscles of the distal upper extremities (DUEs), which include forearms and hands. The preimaging questionnaire/interview records regarding using mobile devices prior to FDG PET/CT were also reviewed and compared with the imaging findings. Most patients (72.0% [319/443]) used mobile devices more than 60 minutes in the period of 24 hours prior to the FDG PET/CT study. Elevated uptake in the muscles in the DUEs was observed in 38.6% (123/319) of these patients. In contrast, among 124 patients who did not use the mobile devices or used the mobile device minimally prior to the study, only 6.5% (8/124) of them had elevated FDG activity in the DUEs. The difference persisted following stratification analysis for sex, age, and serum glucose level in our patient population. Increased FDG uptake in the muscles of the DUEs in young patients is commonly seen in those who used mobile devices prior to PET/CT study. Recommendation should be considered to reduce using mobile devices prior to FDG PET/CT study in young patient population.

  10. Distal mdx muscle groups exhibiting up-regulation of utrophin and rescue of dystrophin-associated glycoproteins exemplify a protected phenotype in muscular dystrophy

    Science.gov (United States)

    Dowling, Paul; Culligan, Kevin; Ohlendieck, Kay

    2002-02-01

    Unique unaffected skeletal muscle fibres, unlike necrotic torso and limb muscles, may pave the way for a more detailed understanding of the molecular pathogenesis of inherited neuromuscular disorders and help to develop new treatment strategies for muscular dystrophies. The sparing of extraocular muscle in Duchenne muscular dystrophy is mostly attributed to the special protective properties of extremely fast-twitching small-diameter fibres, but here we show that distal muscles also represent a particular phenotype that is more resistant to necrosis. Immunoblot analysis of membranes isolated from the well established dystrophic animal model mdx shows that, in contrast to dystrophic limb muscles, the toe musculature exhibits an up-regulation of the autosomal dystrophin homologue utrophin and a concomitant rescue of dystrophin-associated glycoproteins. Thus distal mdx muscle groups provide a cellular system that naturally avoids myofibre degeneration which might be useful in the search for naturally occurring compensatory mechanisms in inherited skeletal muscle diseases.

  11. Protective coatings for in-vessel fusion devices

    International Nuclear Information System (INIS)

    Brossa, F.

    1984-01-01

    Coatings of Al/Si, SAP (Sintered Aluminium Powder), Al 2 O 3 , TiC (low-Z material) and Ta have been developed for in-vessel component protection. Anodic oxidation, vapor depositions, reactive sputtering, chemical vapor deposition (CVD) and plasma spray have been the coating formation methods studied. AISI 316, 310, 304, Inconel 600 and Mo were adopted as base materials. the coatings were characterized in terms of composition, structure and connection with the supporting material. The behavior of coatings under H + , D + and He + irradiation in the energy range 100 eV-8 keV was tested and compared to the solid massive samples. TiC and Ta coatings were tested with thermal shock under power density pulses of 1 kW/cm 2 generated by an electron beam gun. Temperature-dependence of the erosion of TiC by vacuum arcs in a magnetic field was also studied. TiC coatings have low sputtering values, good resistance to arcing and a high chemical stability. TiC and Ta, CVD and plasma spray coatings are thermal-shock resistant. High thermal loads produce cracks but no spalling. Destruction occurred only after melting of the base material. The plasma spray coating method seems to be most appropriate for developing remote handling applications in fusion devices. (orig.)

  12. A modified device for intraoral radiography to assess the distal osseous defects of mandibular second molar after impacted third molar surgery

    Energy Technology Data Exchange (ETDEWEB)

    Ana, Faria Inocencio; Mercedes, Gallas Torreira [Faculty of Medicine and Dentistry, Santiago de Compostela University, Santiago (Spain)

    2011-09-15

    This article is to describe a modified device for intraoral radiography which was developed to obtain reproducible radiographic images for assessment of distal osseous defects of the mandibular second molar (2 Mm) after impacted third molar (3 Mm) surgery. A commercial available alignment system for posterior region was modified by adding a reference gauge pin (millimetric) and threading a hollow acrylic cylinder at the ring of the radiographic positioner to attach the X-ray collimator. The design included customized resin acrylic stent for the occlusal surface of the 2Mm in maximum intercuspal position, individualizing the biteblock positioner. Periapical radiographs were taken before and after surgical extraction of 3 Mm, employing the radiographic technique of parallelism described by Kugelberg (1986) with this modified film holder and inserting the gauge pin on the deepest bone probing depth point. This technique permitted to obtain standardized periapical radiographs with a moderate to high resolution, repeatability, and accuracy. There was no difference between the measurements on the pre- and post-operative radiographs. This technique allowed better maintenance of the same geometric position compared with conventional one. The insertion of the gauge pin provided the same reference point and localized the deepest osseous defect on the two-dimensional radiographs. This technique allowed better reproducibility in posterior radiographic records (distal surface of 2 Mm) and more accurate measurements of radiographic bone level by the use of a millimetric pin.

  13. A modified device for intraoral radiography to assess the distal osseous defects of mandibular second molar after impacted third molar surgery

    International Nuclear Information System (INIS)

    Ana, Faria Inocencio; Mercedes, Gallas Torreira

    2011-01-01

    This article is to describe a modified device for intraoral radiography which was developed to obtain reproducible radiographic images for assessment of distal osseous defects of the mandibular second molar (2 Mm) after impacted third molar (3 Mm) surgery. A commercial available alignment system for posterior region was modified by adding a reference gauge pin (millimetric) and threading a hollow acrylic cylinder at the ring of the radiographic positioner to attach the X-ray collimator. The design included customized resin acrylic stent for the occlusal surface of the 2Mm in maximum intercuspal position, individualizing the biteblock positioner. Periapical radiographs were taken before and after surgical extraction of 3 Mm, employing the radiographic technique of parallelism described by Kugelberg (1986) with this modified film holder and inserting the gauge pin on the deepest bone probing depth point. This technique permitted to obtain standardized periapical radiographs with a moderate to high resolution, repeatability, and accuracy. There was no difference between the measurements on the pre- and post-operative radiographs. This technique allowed better maintenance of the same geometric position compared with conventional one. The insertion of the gauge pin provided the same reference point and localized the deepest osseous defect on the two-dimensional radiographs. This technique allowed better reproducibility in posterior radiographic records (distal surface of 2 Mm) and more accurate measurements of radiographic bone level by the use of a millimetric pin.

  14. Study of the Effective Parameters on the Making Use of Protective Devices

    Directory of Open Access Journals (Sweden)

    Y Tabaraie

    2012-05-01

    Full Text Available

    Background and objectives

    Noise threats health of many groups of industrial workers and causes hearing loss. Use of personal protective device is the best control method to protect against hazardous conditions. Hence, this investigation was carried out to determine situation of using of protective devices and effective parameters on it, in Qom province workers community in 2006.

     

    Methods

    This research is descriptive-sectional study. Sample volume was designed 378 persons working in factories in Qom. First of all, list of Qom factories with noise pollution problems, were collected and 30 important factories among them were selected randomly. In the second stage, 378 persons were selected randomly from workers. The interest information was obtained by questionnaire and collected data were analyzed by SPSS software.

     

    Results

    The obtained results showed that, 83.6% of workers have been using ear protective devices. 296 of them, which were using ear protective devices, had an occupational hygienist in their workplaces. This research also showed that, 109 workers that used ear protective devices, had moderate knowledge level. Moreover, 82.5% of trained workers have used ear protective devices. The statistical analysis of the results showed that there were no significant relationship between use of ear protective devices and existence of occupational hygienist in workplace, knowledge and age of workers, worker’s antecedent, physical health of workers and kind of ear protective devices (p> 0.05. 

     

    Conclusion

    These results showed that among all considered parameters; only four parameters were effective in using ear protective devices; education of workers before employment, head workman and employer’s knowledge level, factories facilitation and kind of ear protective devices.

     

  15. modern devices/techniques in the protection of transformers

    African Journals Online (AJOL)

    operation. To overcome this problem, prin- ciples of high and low impedance protection are employed [7]. In the case of high impedance protection, the impedance of the relay circuit is made higher than the saturated CT by the addi- tion of a stabilizing resistor Rs. So the spill current resulting from asymmetric saturation.

  16. A survey of Canadian Alpine ski racing coaches regarding spinal protective devices for their athletes.

    Science.gov (United States)

    Stainsby, Brynne; Law, Jeremy; Mackinnon, Amy

    2014-12-01

    Spinal protective devices are a recent addition to the protective equipment worn by competitive and recreational alpine skiers and snowboarders. Their rate of use is not documented at the time of publication. The objective of this study was to examine the current attitudes and recommendations of Canadian alpine ski racing coaches towards spinal protective devices. A convenience sample of alpine ski racing coaches across Canada were contacted in each provincial sport governing body in the ski racing community. A ten question online survey was attached to the initial email. Descriptive statistical analysis was utilized. A total of 29 Canadian alpine ski racing coaches completed the study survey. All participants were familiar with spinal protective devices and 51.7% of respondents reported that they do not actively enforce spinal protective device use with their ski racing athletes. 80% of respondents reported that their Canadian ski racing club did not have guidelines or policies regarding spinal protective device use. 86.2% of respondents were unaware if their provincial sport organization had a policy regarding their use. The majority of coaches reporting training athletes aged 10-15, which may help to explain why only half of those surveyed enforce the use of spinal protective devices. This group of athletes may not participate in speed events as frequently as older athletes, where the use of spinal protective devices is more common. The majority of Canadian Alpine ski coaches report a belief that spinal protective device use is important, however, far fewer enforce their use, or work in an environment with a policy requiring it. Further research is required to determine the differences in beliefs and practice.

  17. Awareness training and hearing protection devices: Current practices in the South African mining industry

    CSIR Research Space (South Africa)

    Edwards, A

    2012-09-01

    Full Text Available This presentation outlines the importance of awareness training of managers at all levels and miners regarding the importance of hearing protection devices and adequate knowledge, motivation and training to prevent hearing loss....

  18. Clothing, equipment and devices for personnel protection: Its selection according to occupational risks

    International Nuclear Information System (INIS)

    1989-01-01

    This Venezuelan standard establishes the selection of the type of clothing, equipment and devices for personnel protection, to be used by workers according to the occupational risk they deal with, in order to avoid or to reduce the factors that can, directly or indirectly, affect their physical integrity. For the risks not contemplated in this norm, the selection of the type of clothing, equipment and devices for personnel protection, must be done following the corresponding international standard [es

  19. Installation instructions for overvoltage protection devices; Installationsvorschriften fuer Ueberspannungsschutzeinrichtungen

    Energy Technology Data Exchange (ETDEWEB)

    Zahlmann, Peter; Birkl, Josef [Dehn + Soehne GmbH und Co. KG, Neumarkt (Germany)

    2008-08-15

    DIN VDE 0100-443 (VDE 0100-443):2007-06 and DIN V VDE V 0100-534 (VDE 0100-534):1999-04 are the two most important specifications for low-voltage system design. They help to decide if overvoltage protection systems are necessary, and if so, to select and install overvoltage protection systems in low-voltage systems. In June 2007, the DIN VDE 0100-443 (VDE 0100-443):2007-06 came into force. Part 534 of DIN VDE 0100 is still being worked on and will probably be published in late 2008. (orig.)

  20. Awareness and utilization of protective eye device among welders in ...

    African Journals Online (AJOL)

    Ramakantb

    protection for the eye from weld splatter and reduces the visible light to a comfortable level to improve visibility in the welding zone.[1] All welding processes produce radiation in the UV, visible, and infrared spectra.[1] Welders have been identified as a high-risk group for occupation-related eye injuries[2] and eye disorders ...

  1. Self-Protection of Electrochemical Storage Devices via a Thermal Reversible Sol-Gel Transition.

    Science.gov (United States)

    Yang, Hui; Liu, Zhiyuan; Chandran, Bevita K; Deng, Jiyang; Yu, Jiancan; Qi, Dianpeng; Li, Wenlong; Tang, Yuxin; Zhang, Chenguang; Chen, Xiaodong

    2015-10-07

    Thermal self-protected intelligent electrochemical storage devices are fabricated using a reversible sol-gel transition of the electrolyte, which can decrease the specific capacitance and increase and enable temperature-dependent charging and discharging rates in the device. This work represents proof of a simple and useful concept, which shows tremendous promise for the safe and controlled power delivery in electrochemical devices. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  2. Evaluating Tree Protection Devices: Effects on Growth and Survival–First-Year Results

    Science.gov (United States)

    L. R. Costello; R. H. Schmidt; Gregory A. Giusti

    1991-01-01

    The protection of seedlings from animal browsing is critical for the survival and growth of many tree species. This is particularly true in wildland areas and arid areas (McAuliffe, 1986), and oftentimes in urban areas. A variety of techniques and devices have been used to protect seedlings, from using straw stubble to milk cartons to plastic or metal screens. Recently...

  3. Intercomparison of radiation protection protection devices in a high-energy stray neutron field. Part III: Instrument response

    Czech Academy of Sciences Publication Activity Database

    Silari, M.; Agosteo, S.; Beck, P.; Bedogni, R.; Cale, E.; Caresana, M.; Domingo, C.; Donadille, L.; Dubourg, N.; Esposito, A.; Fehrenbacher, G.; Fernández, F.; Ferrarini, M.; Fiechtner, A.; Fuchs, A.; García, M. J.; Golnik, N.; Gutermuth, F.; Khurana, S.; Klages, T.; Latocha, M.; Mares, V.; Mayer, S.; Radon, T.; Reithmeier, H.; Rollet, S.; Roos, H.; Rühm, W.; Sandri, S.; Schardt, D.; Simmer, G.; Spurný, František; Trompier, F.; Villa-Grasa, C.; Weitzenegger, E.; Wiegel, B.; Wielunski, M.; Wissmann, F.; Zechner, A.; Zielczyński, M.

    2009-01-01

    Roč. 44, 7-8 (2009), s. 673-691 ISSN 1350-4487 R&D Projects: GA AV ČR IAA100480902 Institutional research plan: CEZ:AV0Z10480505 Keywords : radiation protection devices * radiation field * detectors * dosemeters Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 0.973, year: 2009

  4. Development of automatic knob-generation tool for the protection devices in the LHC

    CERN Document Server

    Koulouris, Aimilianos

    2013-01-01

    In the LHC transfer lines, the beam is extremely well controlled and confined. This is managed through a wide variety of superconducting magnets, which focus, defocus and bend the beam. As for the control part, there are numerous monitoring devices co-operating with the SCADA systems, all working for the protection of the instruments and the people. Our work, in particular, falls under the beam transfer lines, TI2 and TI8, between the SPS and the LHC. The protection devices in the transfer lines need to be set up according to the optics of the beam, namely the trajectory inside the beam-pipe. This means that, depending on the trajectory of the beam inside the beam-pipe and the positioning of the protection devices around the beam-pipe, certain adjustments need to be made, so that the beam will not damage or even affect the monitoring devices.

  5. Characteristics of Overvoltage Protection with Cascade Application of Surge Protective Devices in Low-Voltage AC Power Circuits

    Directory of Open Access Journals (Sweden)

    RADULOVIC, V.

    2015-08-01

    Full Text Available Surge Protective Devices (SPDs are widely used for protection of the equipment in low-voltage AC power circuits against wide variety of surges. Cascade application of SPDs starting at the service entrance of a building and downstream toward near sensitive equipment is intended to ensure optimal energy distribution among installed SPDs, as well as proper equipment protection against surges. Characteristics of overvoltage protection with two-stage application of SPDs have been analyzed in the paper through performed measurements, followed by simulations and numerical modeling using the ATP/EMTP and MATLAB Simulink. Parametric analysis of the protection's characteristics in wide range of influencing factors has been performed in order to define a set of applicable solutions for proper selection and performance of SPDs.

  6. PLZT thermal/flash protective goggles: device concepts and constraints

    International Nuclear Information System (INIS)

    Cutchen, J.T.

    1979-01-01

    In 1975 Sandia Laboratories began the design and development of PLZT Goggles for the US Air Force to provide protection from temporary flashblindness and permanent retinal burns caused by the brilliant flash of nuclear explosions. The user requirements, system and physical constraints, and use/storage environments were all considered in arriving at the final design goals. When the program began, there was no industrial capability to manufacture large-aperture PLZT materials or bonded lens assemblies. The technology has been established from a laboratory baseline in a brief period, and operational testing and evaluation by the Air Force has been completed. The goggles, identified as the EEU-2/P,, are now in production

  7. Can I Use Marijuana Safely? An Examination of Distal Antecedents, Marijuana Protective Behavioral Strategies, and Marijuana Outcomes.

    Science.gov (United States)

    Bravo, Adrian J; Prince, Mark A; Pearson, Matthew R

    2017-03-01

    Given the high prevalence of marijuana use among college students, it is imperative to determine the factors that may reduce risk of problematic marijuana use and/or the development of cannabis use disorder. We examined marijuana protective behavioral strategies (PBS) as a proximal predictor of marijuana-related outcomes and a mediator of the associations between other known risk/protective factors and marijuana-related outcomes. Using data from a sample of 2,129 past-month marijuana users, collected from 11 universities in the United States, we examined marijuana PBS use as a mediator of the effects of sex, age at first use, impulsivity-like traits, and marijuana use motives on marijuana use frequency and marijuana related consequences. Marijuana PBS was identified as a robust negative predictor of marijuana use frequency and marijuana-related consequences. Further, Marijuana PBS use fully or partially mediated the effects of sex, premeditation, perseverance, coping motives, enhancement motives, conformity motives, and expansion motives on marijuana outcomes. Our results suggest that marijuana PBS use is a good candidate to be considered as a mechanism by which marijuana users moderate their marijuana use and attenuate their risk of experiencing marijuana-related consequences.

  8. Preventive protection device and method for bottom of reactor pressure vessel

    International Nuclear Information System (INIS)

    Hayashi, Eisaku; Kurosawa, Koichi; Furukawa, Hideyasu; Morinaka, Ren; Enomoto, Kunio; Otaka, Masahiro; Yoshikubo, Fujio; Chiba, Noboru; Sato, Kazunori.

    1995-01-01

    In a preventive protection device for improving stresses in reactor structural components by jetting highly pressurized water with cavitation bubbles from a jetting nozzle toward structural components in a reactor pressure vessel, a fixed structure to a CRD housing is provided with a rotational body attached to the structure, a multi joint arm and a jetting nozzle supported to the multi joint arm. The jetting nozzle is disposed at a position where the center of the jetting deviates from the center of the CRD housing. In addition, a monitoring camera is disposed for displaying the target for preventive protection. The state of stresses on a plurality of targets for preventive protection can be improved by the preventive protection device at a fixed position in the bottom of a reactor pressure vessel where housings stand densely, thereby enabling to attain the preventive protection operation easily and rapidly. (N.H.)

  9. Novel material and structural design for large-scale marine protective devices

    International Nuclear Information System (INIS)

    Qiu, Ang; Lin, Wei; Ma, Yong; Zhao, Chengbi; Tang, Youhong

    2015-01-01

    Highlights: • Large-scale protective devices with different structural designs have been optimized. • Large-scale protective devices with novel material designs have been optimized. • Protective devices constructed of sandwich panels have the best anti-collision performance. • Protective devices with novel material design can reduce weight and construction cost. - Abstract: Large-scale protective devices must endure the impact of severe forces, large structural deformation, the increased stress and strain rate effects, and multiple coupling effects. In evaluation of the safety of conceptual design through simulation, several key parameters considered in this research are maximum impact force, energy dissipated by the impactor (e.g. a ship) and energy absorbed by the device and the impactor stroke. During impact, the main function of the ring beam structure is to resist and buffer the impact force between ship and bridge pile caps, which could guarantee that the magnitude of impact force meets the corresponding requirements. The means of improving anti-collision performance can be to increase the strength of the beam section or to exchange the steel material with novel fiber reinforced polymer laminates. The main function of the buoyancy tank is to absorb and transfer the ship’s kinetic energy through large plastic deformation, damage, or friction occurring within itself. The energy absorption effect can be improved by structure optimization or by the use of new sandwich panels. Structural and material optimization schemes are proposed on the basis of conceptual design in this research, and protective devices constructed of sandwich panels prove to have the best anti-collision performance

  10. Study of efficiency and current use of respiratory protective devices

    International Nuclear Information System (INIS)

    Linauskas, S.H.; Kalos, F.

    1984-12-01

    The efficiency of a helmet-type powered air-purifying respirator was studied in the work environment of an underground uranium mine. Workplace protection factors (WPF) were measured, using approximately 30-minute air sampling periods and repeated sampling throughout the work shifts for six miners during three shifts each. The WPF of the modified Racal AH-5 helmet was 17.8 (geometric mean) with new filters in the respirator; the WPF dropped to 5.3 when four-day-old filters were used. The WPF results were lognormally distributed. The test population appeared to be a homogeneous set: there was no significant difference in the mean WPFs of individual test subjects. The study could not resolve any effect of elapsed time within the work shift or of ambient Working Level on the WPF. The actual use levels and the problems associated with respirator use were studied at the same time, principally via a user survey. The respirators have a high level of acceptance among the user population of underground uranium miners and 72.5 percent of the 207 survey respondents stated six or more hours use with the visor in the correct 'down' position per shift

  11. Surge protective device response to steep front transient in low voltage circuit

    Energy Technology Data Exchange (ETDEWEB)

    Marcuz, J.; Binczak, S.; Bilbault, J.M. [Universite de Bourgogne, Dijon (France)], Emails: jerome.marcuz@ laposte.net, stbinc@u-bourgogne.fr, bilbault@u-bourgogne.fr; Girard, F. [ADEE Electronic, Pont de Pany (France)

    2007-07-01

    Surge propagation on cables of electrical or data lines leads to a major protection problem as the number of equipment based on solid-state circuits or microprocessors increases. Sub-microsecond components of real surge waveform has to be taken into account for a proper protection even in the case of surges caused by indirect lightning effects. The response of a model of transient voltage suppressor diode based surge protection device (SPD) to fast front transient is analytically studied, then compared to simulations, including the lines connected to the SPD and to the protected equipment. (author)

  12. Smart Electrochemical Energy Storage Devices with Self-Protection and Self-Adaptation Abilities.

    Science.gov (United States)

    Yang, Yun; Yu, Dandan; Wang, Hua; Guo, Lin

    2017-12-01

    Currently, with booming development and worldwide usage of rechargeable electrochemical energy storage devices, their safety issues, operation stability, service life, and user experience are garnering special attention. Smart and intelligent energy storage devices with self-protection and self-adaptation abilities aiming to address these challenges are being developed with great urgency. In this Progress Report, we highlight recent achievements in the field of smart energy storage systems that could early-detect incoming internal short circuits and self-protect against thermal runaway. Moreover, intelligent devices that are able to take actions and self-adapt in response to external mechanical disruption or deformation, i.e., exhibiting self-healing or shape-memory behaviors, are discussed. Finally, insights into the future development of smart rechargeable energy storage devices are provided. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  13. Modelling of pressure increase protection system for the vacuum vessel of W7-X device

    Energy Technology Data Exchange (ETDEWEB)

    Kaliatka, Tadas, E-mail: tadas.kaliatka@lei.lt; Uspuras, Eugenijus; Kaliatka, Algirdas

    2016-11-01

    Highlights: • Two in-vessel LOCAs (partial and guillotine break of 40 mm diameter pipe of cooling system) for Wendelstein 7-X fusion device were analyzed. • The analysis of the processes in the cooling system, vacuum vessel and pressure increase protection system were performed using thermal-hydraulic RELAP5 Mod3.3 code. • The suitability of pressure increase protection system was assessed. - Abstract: In fusion devices, plasma is contained in a vacuum vessel. The vacuum vessel cannot withstand a pressure above atmospheric. Any damage of in-vessel components could lead to water ingress and may lead to pressure increase and possible damage of vacuum vessel. In order to avoid such undesirable consequences, the pressure increase protection system is designed. In this article, the processes occurring in the vacuum vessel and pressure increase protection system of W7-X device during LOCA (small and guillotine pipe break) event are analyzed. The model of W7-X cooling system, vacuum vessel and pressure increase protection system was developed using RELAP5 code. Numerical analysis of partial and guillotine break of 40 mm diameter pipe of cooling system was performed. Calculation results showed that burst disc of the pressure increase protection system does not open when the cross section area of partial break in the cooling system is smaller than 1 mm{sup 2}. During the guillotine break of cooling system, the burst disc opens, but pressure increase protection system is capable to prevent overpressure of the vacuum vessel.

  14. Biometric template data protection in mobile device environment using XML-database

    DEFF Research Database (Denmark)

    Thirumathyam, Rubathas; Derawi, Mohammad; Fischer, Paul

    2010-01-01

    This paper proposes a non-traditional XML database which supports biometric templates and provides an API which can be used by independent applications in mobile device environments. Until recently biometric systems are becoming more and more visible in mobile phone devices including fingerprint...... recognition or gait recognition. To gain a real understanding of how it is possible to protect the biometric data, this paper first starts out with introducing a technique for security in a biometric system and emphasizes that template protection is important by going through the vulnerabilities and threats...

  15. Shape-memory alloy overload protection device for osseointegrated transfemoral implant prosthetic limb attachment system

    Science.gov (United States)

    Xu, Wei; Shao, Fei; Hughes, Steven

    2002-11-01

    The osseointegrated trans-femoral implant system provides a direct anchoring technique to attach prosthetic limb. This technique was first introduced PI Brenmark in Sweden. The UK had the first clinical trial in 1997 and currently has 6 active limb wearers. The success of this procedure has the potential for improved gait function and mobility, increased employability and significant long-term improvements in the quality of life for above knee amputees. However, the significant load involved in the trans-femoral implant system has caused permanent deformation and/or fractures of the implant abutment in several occasions. To protect the implant system, the implant abutment in particularly, an overloading protection device was introduced. The device uses mechanical mechanism to release torsion overload on the abutment. However, the bending overload protection remains unsolved. To solve the problem, a new overload protection device was developed. This device uses SMA component for bending overload protection. In this paper, the results of non-linear finite element modelling of the SMA and steel (AISI 1040) components were presented. Experiments were also carried out using steel components to assess the design which is based on the non-linear property of the materials.

  16. Objective Metric Based Assessments for Efficient Evaluation of Auditory Situation Awareness Characteristics of Tactical Communications and Protective Systems (TCAPS) and Augmented Hearing Protective Devices (HPDs)

    Science.gov (United States)

    2015-11-30

    Assessments for Efficient Evaluation of Auditory Situation Awareness Characteristics of Tactical Communications and Protective Systems (TCAPS) and Augmented... auditory situation awareness (ASA) that objectively quantified the ASA performance afforded by various Tactical Communications and Protection Systems...HPD, tactical communications and protection systems, hearing protection devices, auditory situation awareness, ASA, DRILCOM U U U UU 95 Michael E

  17. Testing the protective efficiency of personal respiratory protection devices in radiologically contaminated environments

    Directory of Open Access Journals (Sweden)

    Rajić Dušan S.

    2013-01-01

    Full Text Available The use of ammunition primed with depleted uranium is one of the hallmarks of modern combat operations, resulting in environmental contamination by particles of depleted uranium and uranium oxide, scattered around in the form of submicron-scale aerosols. This paper examined the protective effectiveness of the Serbian military's M3 protective face mask in relation to the presence of airborne depleted uranium and its by-products. Sodium chloride in solid aerosol form was used as a test substance and adequate physical simulator of such radioactive aerosols because its granulometric (particle size distribution met the requirements of suitability as a simulator. Determination of aerosol concentration was carried out by flame photometry method, whilst granulometric distribution was determined by an electric particles analyzer. It was established that the total internal leakage of the M3 protective mask was as much a function of the penetration of particles through the combined M3 filter as of the leaks along the fitting line of the user's face mask and the inhalation valve. In terms of its protective effect against aerosols of depleted uranium and associated oxides, the Serbian M3 protective mask was determined to be of high efficiency and physiological suitability. [Projekat Ministarstva nauke Republike Srbije, br. TR34034

  18. Evaluation of the medtronic exponent self-expanding carotid stent system with the medtronic guardwire temporary occlusion and aspiration system in the treatment of carotid stenosis: combined from the MAVErIC (Medtronic AVE Self-expanding CaRotid Stent System with distal protection In the treatment of Carotid stenosis) I and MAVErIC II trials.

    Science.gov (United States)

    Higashida, Randall T; Popma, Jeffrey J; Apruzzese, Patricia; Zimetbaum, Peter

    2010-02-01

    Embolic protection devices and improved stent technology have advanced the endovascular treatment of carotid artery disease. A combined analysis was performed of the MAVErIC (Medtronic AVE Self-expanding CaRotid Stent System with distal protection) I and II trials to evaluate the safety and feasibility of this system among patients at high risk for surgical endarterectomy. Four hundred ninety-eight patients were enrolled in the MAVErIC I (99 patients) and MAVErIC II (399 patients) studies from June 2001 to October 2004. The results were pooled for statistical analysis of a common primary end point, the 365-day rate of major adverse events. Clinical follow-up took place at 30 days, 6 months, and 365 days postprocedure. The 365-day major adverse event rate, defined as death, stroke, or myocardial infarction within 30 days, and death, ipsilateral stroke, or myocardial infarction from days 31 to 365 was 12.5%. The incidence of neurological death through 365 days was 1.1%. The 30-day major adverse event rate was 5.4%. Subgroup analyses showed no notable differences in the 365-day major adverse event rate for symptomatic patients compared with asymptomatic patients. Treatment of carotid artery disease with carotid artery stenting with a self-expanding stent and distal embolic protection results in a low 30-day adverse event rate, including the occurrence of stroke in patients at high risk for carotid endarterectomy.

  19. Identification, investigation and analysis of end-of-wind protection devices for vertical and incline shafts.

    CSIR Research Space (South Africa)

    Ottermann, RW

    2000-12-01

    Full Text Available The occurrence and cause of overwind and underwind events in underground mining were investigated in conjunction with devices, which are at present being applied to prevent and control such incidents. Proposals for in-shaft systems to protect...

  20. Effects of Hearing Protection Device Attenuation on Unmanned Aerial Vehicle (UAV) Audio Signatures

    Science.gov (United States)

    2016-03-01

    UAV) Audio Signatures by Melissa Bezandry, Adrienne Raglin, and John Noble Approved for public release; distribution...Research Laboratory Effects of Hearing Protection Device Attenuation on Unmanned Aerial Vehicle (UAV) Audio Signatures by Melissa Bezandry...Aerial Vehicle (UAV) Audio Signatures 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) Melissa Bezandry

  1. 46 CFR 111.50-5 - Location of overcurrent protective devices.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Location of overcurrent protective devices. 111.50-5 Section 111.50-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING...: (i) Exposed to mechanical damage; and (ii) Near an easily ignitable material or where explosive gas...

  2. Method and device for protecting objects against Rocket Propelled Grenades (RPGs)

    NARCIS (Netherlands)

    Wentzel, C.M.

    2008-01-01

    A device and a method for protecting objects against rocket-propelled grenades having a hollow nose cone includes a netting of knotted and coated superstrong fibers disposed in front of the object, in such a manner that the nose cone of a rocket caught in the netting will penetrate one of the meshes

  3. A study on ship impacting a flexible crashworthy device for protecting bridge pier

    Directory of Open Access Journals (Sweden)

    Yang Liming

    2015-01-01

    Full Text Available As the accident of a vessel impacting a bridge pier will cause serious disaster, such as destroyed bridge, sinking ship and polluting environment, the technology and method to protect bridge pier from ship collision have been widely investigated recently. Due to the huge kinetic energy of large-tonnage ship and the short time duration in the collision, the studies involve impact mechanics. A developed flexible crashworthy device has been developed to protect bridges, which consists of an outer steel-periphery, an inner steel-periphery and the rubber coating SWRCs(soft elements installed between them. When the SWRC crashworthy device is installed, the collision duration under low impact force is prolonged due to its high compliance, which results in the ship having enough time to turn its navigation direction and most of the remainder kinetic energy being carried off by the turned away ship. Consequently, both impact forces on the ship and on the bridge pier decrease markedly. This is the key reason as to why the SWRC crashworthy device can avoid the destruction of both the bridge and the ship. Based on our results of theoretical studies and numerical simulations, the present paper will propose an experiment-adopted a real ship to impact a flexible crashworthy device. The collision test has been performed 12 times with different speed, carrying capacity, and impact angle of the ship. After the experiments, the ship, flexible crashworthy device and the pier are not damaged. The experiments show that the flexible crashworthy device can turn away the impact ship, so that the ship moves along the outer part of the device, which reduces the ship impact force on the bridge pier obviously. It not only protects bridges but also avoids the damage to ships.

  4. A study on ship impacting a flexible crashworthy device for protecting bridge pier

    Science.gov (United States)

    Yang, Liming; Liu, Jun

    2015-09-01

    As the accident of a vessel impacting a bridge pier will cause serious disaster, such as destroyed bridge, sinking ship and polluting environment, the technology and method to protect bridge pier from ship collision have been widely investigated recently. Due to the huge kinetic energy of large-tonnage ship and the short time duration in the collision, the studies involve impact mechanics. A developed flexible crashworthy device has been developed to protect bridges, which consists of an outer steel-periphery, an inner steel-periphery and the rubber coating SWRCs(soft elements) installed between them. When the SWRC crashworthy device is installed, the collision duration under low impact force is prolonged due to its high compliance, which results in the ship having enough time to turn its navigation direction and most of the remainder kinetic energy being carried off by the turned away ship. Consequently, both impact forces on the ship and on the bridge pier decrease markedly. This is the key reason as to why the SWRC crashworthy device can avoid the destruction of both the bridge and the ship. Based on our results of theoretical studies and numerical simulations, the present paper will propose an experiment-adopted a real ship to impact a flexible crashworthy device. The collision test has been performed 12 times with different speed, carrying capacity, and impact angle of the ship. After the experiments, the ship, flexible crashworthy device and the pier are not damaged. The experiments show that the flexible crashworthy device can turn away the impact ship, so that the ship moves along the outer part of the device, which reduces the ship impact force on the bridge pier obviously. It not only protects bridges but also avoids the damage to ships.

  5. Patterns of Facial Fractures and Protective Device Use in Motor Vehicle Collisions From 2007 to 2012.

    Science.gov (United States)

    Hyman, David A; Saha, Sandeep; Nayar, Harry S; Doyle, John F; Agarwal, Suresh K; Chaiet, Scott R

    2016-12-01

    Facial fractures after motor vehicle collisions are a significant source of facial trauma in patients seen at trauma centers. With recent changes in use of seat belts and advances in airbag technology, new patterns in the incidence of facial fractures after motor vehicle collisions have yet to be quantified. To evaluate the incidence of facial fractures and assess the influence of protective device use in motor vehicle collisions in patients treated at trauma centers in the United States. Using a data set from the National Trauma Data Bank, we retrospectively assessed facial fractures in motor vehicle collisions occurring from 2007 through 2012, reported by level I, II, III, and IV trauma centers. Data analysis was performed from March 13 to September 22, 2015. We characterized the data set by subsite of facial injury using International Classification of Diseases, Ninth Revision codes including mandible, midface, and nasal fractures. We assessed the influence of variables such as age, sex, race/ethnicity, crash occupant (driver or passenger), use of protective device, and presence or suspicion of alcohol use. A total of 518 106 patients required assessment at a trauma center after a motor vehicle collision, with 56 422 (10.9%) experiencing at least 1 facial fracture. Nasal fracture was the most common facial fracture (5.6%), followed by midface (3.8%), other (3.2%), orbital (2.6%), mandible (2.2%), and panfacial fractures (0.8%). Of the subset sustaining at least 1 facial fracture, 5.8% had airbag protection only, 26.9% used a seat belt only, and 9.3% used both protective devices, while 57.6% used no protective device. Compared with no protective device, the use of an airbag alone significantly reduced the likelihood of facial fracture after a motor vehicle collision (odds ratio, 0.82; 95% CI, 0.79-0.86); use of a seat belt alone had a greater effect (odds ratio, 0.57; 95% CI, 0.56-0.58) and use of both devices provided the greatest odds reduction (odds ratio

  6. MODELING OF POWER SYSTEMS AND TESTING OF RELAY PROTECTION DEVICES IN REAL AND MODEL TIME

    Directory of Open Access Journals (Sweden)

    I. V. Novash

    2017-01-01

    Full Text Available The methods of modelling of power system modes and of testing of relay protection devices with the aid the simulation complexes in real time and with the help of computer software systems that enables the simulation of virtual time scale are considered. Information input protection signals in the simulation of the virtual model time are being obtained in the computational experiment, whereas the tests of protective devices are carried out with the help of hardware and software test systems with the use of estimated input signals. Study of power system stability when modes of generating and consuming electrical equipment and conditions of devices of relay protection are being changed requires testing with the use of digital simulators in a mode of a closed loop. Herewith feedbacks between a model of the power system operating in a real time and external devices or their models must be determined (modelled. Modelling in real time and the analysis of international experience in the use of digital simulation power systems for real-time simulation (RTDS simulator have been fulfilled. Examples are given of the use of RTDS systems by foreign energy companies to test relay protection systems and control, to test the equipment and devices of automatic control, analysis of cyber security and evaluation of the operation of energy systems under different scenarios of occurrence of emergency situations. Some quantitative data on the distribution of RTDS in different countries and Russia are presented. It is noted that the leading energy universities of Russia use the real-time simulation not only to solve scientific and technical problems, but also to conduct training and laboratory classes on modelling of electric networks and anti-emergency automatic equipment with the students. In order to check serviceability of devices of relay protection without taking into account the reaction of the power system tests can be performed in an open loop mode with the

  7. Drug-eluting versus bare metal stents in patients with st-segment-elevation myocardial infarction: eight-month follow-up in the Drug Elution and Distal Protection in Acute Myocardial Infarction (DEDICATION) trial

    DEFF Research Database (Denmark)

    Kelbaek, Henning; Thuesen, Leif; Helqvist, Steffen

    2008-01-01

    BACKGROUND: Implantation of drug-eluting stents (DES) limits the rate of coronary restenosis in most patients with coronary artery disease, but data are scarce with regard to their use in patients with ST-segment-elevation myocardial infarction and in connection with distal protection of the micr......BACKGROUND: Implantation of drug-eluting stents (DES) limits the rate of coronary restenosis in most patients with coronary artery disease, but data are scarce with regard to their use in patients with ST-segment-elevation myocardial infarction and in connection with distal protection...... comparable with regard to baseline demographic and angiographic characteristics. The mean late lumen loss was significantly lower in patients treated with a DES (0.06 mm; SD, 0.66 mm) than in patients who had a bare metal stent implanted (0.47 mm; SD, 0.69 mm; Pcomposite end point...

  8. Privacy Protection for Personal Health Device Communication and Healthcare Building Applications

    Directory of Open Access Journals (Sweden)

    Soon Seok Kim

    2014-01-01

    Full Text Available This paper proposes a new method for protecting patient privacy when communicating with a gateway which collects bioinformation through using personal health devices, a type of biosensor for telemedicine, at home and in other buildings. As the suggested method is designed to conform with ISO/IEEE 11073-20601, which is the international standard, interoperability with various health devices was considered. We believe it will be a highly valuable resource for dealing with basic data because it suggests an additional standard for security with the Continua Health Alliance or related international groups in the future.

  9. Are pressure redistribution surfaces or heel protection devices effective for preventing heel pressure ulcers?

    Science.gov (United States)

    Junkin, Joan; Gray, Mikel

    2009-01-01

    Heel pressure ulcers are recognized as second in prevalence only to pressure ulcer (PU) on the heel among hospitalized patients, and recent studies suggest their incidence may be higher than even sacral ulcers. We systematically reviewed the literature to identify and evaluate whether pressure redistribution surfaces or heel protection devices are effective for the prevention of heel ulcers. We searched CINAHL and MEDLINE databases, using the keywords "pressure ulcer" and "heel," which we also searched the Cochrane Library, using the key terms "pressure ulcer," "heel," and "support surface." We hand searched the ancestry of pertinent research reports and review articles in order to identify additional studies. Inclusion criteria were (1) any study that compared one or more pressure redistribution surfaces or heel protection devices designed specifically to prevent heel PU and (2) any study comparing 2 or more pressure redistribution surfaces designed to prevent PU that specifically reported differences in the incidence of heel PU. Exclusion criteria were (1) studies that did not measure heel PU incidence as an outcome, (2) studies without an English language abstract, and (3) studies that reported overall PU incidence but did not analyze heel PU incidence separately. Clinical evidence concerning the efficacy of pressure redistribution surfaces or heel protection devices is sparse. Existing evidence suggests that pressure redistribution surfaces vary in their ability to prevent heel pressure ulcers, but there is insufficient evidence to determine which surfaces are optimal for this purpose. A single study suggests that a wedge-shaped viscoelastic foam cushion is superior to standard foam pillows for preventing heel PU, but further research is needed before a definitive conclusion concerning this issue can be reached. There is insufficient evidence to determine whether heel protection devices are more effective than a standard hospital foam pillow for the prevention

  10. A comparison of proximal tibia, distal femur, and proximal humerus infusion rates using the EZ-IO intraosseous device on the adult swine (Sus scrofa) model.

    Science.gov (United States)

    Lairet, Julio; Bebarta, Vikhyat; Lairet, Kimberly; Kacprowicz, Robert; Lawler, Christopher; Pitotti, Rebecca; Bush, Anneke; King, James

    2013-01-01

    We sought to compare the flow rates of the proximal tibia, the distal femur, and the proximal humerus using high pressure (greater than 300 mmHg) through an intraosseous (IO) infusion needle in an adult swine model. We performed a prospective interventional study in 11 swine. After placement of central vein and arterial lines, blood was removed via the central line until the animal's mean arterial pressure decreased 25% from the recorded baseline. We inserted a 25-mm IO needle into the proximal tibia and 45-mm needles into the distal femur and proximal humerus. All extremities were utilized in each study animal. We infused normal saline at each site for 10 minutes with a pressure bag inflated to the highest achievable pressure (greater than 300 mmHg) as measured at the infusion site with a calibrated portable inline pressure gauge. We measured the volume of normal saline remaining and we calculated infusion rates for each site. We then compared infusion flow rates between the three locations. Statistical analysis and comparison of the infusion rates of all three study arms were as performed using analysis of variance (ANOVA). The average weight of the swine was 71 kg (range 64-84 kg). Successful placement of the IO needle was confirmed at all three sites. The mean infusion flow rate was 213 mL/min (standard deviation [SD] 53.2 mL/min) for the proximal humerus, 138 mL/min (SD 65.3 mL/min) for the distal femur, and 103 mL/min (SD 48.1 mL/min) for the proximal tibia (p IO placement, with a potential for higher flow rates than the proximal tibia and distal femur when resuscitating a patient.

  11. The solar ultraviolet B radiation protection provided by shading devices with regard to its diffuse component.

    Science.gov (United States)

    Kudish, Avraham I; Harari, Marco; Evseev, Efim G

    2011-10-01

    The composition of the incident solar global ultraviolet B (UVB) radiation with regard to its beam and diffuse radiation fractions is highly relevant with regard to outdoor sun protection. This is especially true with respect to sun protection during leisure-time outdoor sun exposure at the shore and pools, where people tend to escape the sun under shade trees or different types of shading devices, e.g., umbrellas, overhangs, etc., believing they offer protection from the erythemal solar radiation. The degree of sun protection offered by such devices is directly related to the composition of the solar global UVB radiation, i.e., its beam and diffuse fractions. The composition of the incident solar global UVB radiation can be determined by measuring the global UVB (using Solar Light Co. Inc., Model 501A UV-Biometer) and either of its components. The beam component of the UVB radiation was determined by measuring the normal incidence beam radiation using a prototype, tracking instrument consisting of a Solar Light Co. Inc. Model 501A UV-Biometer mounted on an Eppley Solar Tracker Model St-1. The horizontal beam component of the global UVB radiation was calculated from the measured normal incidence using a simple geometric correlation and the diffuse component is determined as the difference between global and horizontal beam radiations. Horizontal and vertical surfaces positioned under a horizontal overhang/sunshade or an umbrella are not fully protected from exposure to solar global UVB radiation. They can receive a significant fraction of the UVB radiation, depending on their location beneath the shading device, the umbrella radius and the albedo (reflectance) of the surrounding ground surface in the case of a vertical surface. Shading devices such as an umbrella or horizontal overhang/shade provide relief from the solar global radiation and do block the solar global UVB radiation to some extent; nevertheless, a significant fraction of the solar global UVB

  12. Research and development to protect soldiers from landmines and improvised explosive devices

    CSIR Research Space (South Africa)

    Ahmed, R

    2015-10-01

    Full Text Available Devices (IEDs) remain a major threat for military vehicles, their occupants and other assets • Warfare shifting from conventional to unconventional tactics and weapons • Improvised nature of IEDs make it difficult to predict terminal effects...) • Ease of manufacture • Surprise element (improvised nature) • Hidden deployment • Lack of countermeasures / protection • Massive psychological effect on morale • Disruption of logistics • Devastating terminal effect https...

  13. Plasma sprayed TiC coatings for first wall protection in fusion devices

    International Nuclear Information System (INIS)

    Groot, P.; Laan, J.G. van der; Laas, L.; Mack, M.; Dvorak, M.

    1989-01-01

    For protection of plasma facing components in nuclear fusion devices thick titanium carbide coatings are being developed. Coatings have been produced by plasma spraying at atmospheric pressure (APS) and low pressure (LPPS) and analyzed with respect to microstructure and chemical composition. Thermo-mechanical evaluation has been performed by applying short pulse laser heat flux tests. The influence of coating thickness and porosity on the resistance to spalling by thermal shocks appears to be more important than aspects of chemical composition. (author)

  14. Key Technologies Development of Transient Signals Based Protection Device Using DSP and S-Transform

    Science.gov (United States)

    Liu, Xingmao; Zheng, Gao

    2017-05-01

    The correctness of new principle of transient signal based protection used to be verified by simulating. In order to further introduce the dynamic simulation experiments for the transient signal based protection algorithm, the key technologies of transient signal based protection device were developed. The hardware of the synchronous multi-channel data acquisition and high-speed data processing was designed with kernel of high speed floating point digital signal processor TMS320C6748 and simultaneous sampling analog-to-digital converter. The sampling program reads the AD conversion data using DMA mode, which reduce the consumption of CPU time. The S transform was used to extract the fault traveling wave signals from the sampled data. The time consumption of algorithm which extract the traveling wave was analyzed when it ran on TMS320C6748. The test result shows that the hardware and software design is feasible.

  15. Fish protection at steam-electric power plants: alternative screening devices

    International Nuclear Information System (INIS)

    Cannon, J.B.

    1978-01-01

    Since the enactment of the Federal Water Pollution Control Act Amendments of 1972, very few innovations have surfaced that advance the state of intake technology for fish protection at steam-electric power plants. After careful examination of basic hydrology, hydraulics, and ecology of the source water body is completed and after a suitable location for the intake is established, the design process reduces to the development of proper screening techniques and to the provision of a means of preventing resident and migratory species from entering the intake structure. As a result of this design process, three basic fish protection concepts have evolved: fish deterrence, fish collection and removal, and fish diversion. Intake screening devices that protect fish are discussed

  16. Reverse Distal Transverse Palmar Arch in Distal Digital Replantation.

    Science.gov (United States)

    Wei, Ching-Yueh; Orozco, Oscar; Vinagre, Gustavo; Shafarenko, Mark

    2017-11-01

    Refinements in microsurgery have made distal finger replantation an established technique with high success rates and good functional and aesthetic outcomes. However, it still represents a technically demanding procedure due to the small vessel caliber and frequent lack of vessel length, requiring the use of interpositional venous grafts in some instances. We describe a new technique for anastomosis in fingertip replantation, whereby the need for venous grafts is eliminated. Applying the reverse distal transverse palmar arch technique, 11 cases of distal digital replantation were performed between January 2011 and July 2016. The described procedure was used for arterial anastomosis in 10 cases and arteriovenous shunting for venous drainage in 1 case. A retrospective case review was conducted. The technical description and clinical outcome evaluations are presented. Ten of the 11 replanted digits survived, corresponding to an overall success rate of 91%. One replant failed due to venous insufficiency. Blood transfusions were not required for any of the patients. Follow-up (range, 1.5-5 months) revealed near-normal range of motion and good aesthetic results. All of the replanted digits developed protective sensation. The average length of hospital admission was 5 days. All patients were satisfied with the results and were able to return to their previous work. The use of the reverse distal transverse palmar arch is a novel and reliable technique in distal digital replantation when an increase in vessel length is required, allowing for a tension-free arterial repair without the need for vein grafts.

  17. Fish-protection devices at unscreened water diversions can reduce entrainment: evidence from behavioural laboratory investigations

    Science.gov (United States)

    Poletto, Jamilynn B.; Cocherell, Dennis E.; Mussen, Timothy D.; Ercan, Ali; Bandeh, Hossein; Kavvas, M. Levent; Cech, Joseph J.; Fangue, Nann A.

    2015-01-01

    Diversion (i.e. extraction) of water from rivers and estuaries can potentially affect native wildlife populations if operation is not carefully managed. For example, open, unmodified water diversions can act as a source of injury or mortality to resident or migratory fishes from entrainment and impingement, and can cause habitat degradation and fragmentation. Fish-protection devices, such as exclusion screens, louvres or sensory deterrents, can physically or behaviourally deter fish from approaching or being entrained into water diversions. However, empirical assessment of their efficacy is often lacking or is investigated only for particular economically or culturally important fishes, such as salmonids. The Southern population of anadromous green sturgeon (Acipenser medirostris) is listed as threatened in California, and there is a high density of water diversions located within their native range (the Sacramento–San Joaquin watershed). Coupled with their unique physiology and behaviour compared with many other fishes native to California, the green sturgeon is susceptible to entrainment into diversions and is an ideal species with which to study the efficacy of mitigation techniques. Therefore, we investigated juvenile green sturgeon (188–202 days post-hatch) in the presence of several fish-protection devices to assess behaviour and entrainment risk. Using a large experimental flume (∼500 kl), we found that compared with an open diversion pipe (control), the addition of a trash-rack box, louvre box, or perforated cylinder on the pipe inlet all significantly reduced the proportion of fish that were entrained through the pipe (P = 0.03, P = 0.028, and P = 0.028, respectively). Likewise, these devices decreased entrainment risk during a single movement past the pipe by between 60 and 96%. These fish-protection devices should decrease the risk of fish entrainment during water-diversion activities. PMID:27293725

  18. Creation of a head and face protection device for children undergoing procedures in prone position.

    Science.gov (United States)

    Wenk, Manuel; Pöpping, Daniel; Henning, Martin; Wenk, Melanie; Liljenqvist, Ulf; Möllmann, Michael

    2009-06-01

    Positioning the head of patients undergoing procedures in lateral or prone position remains a difficult task for the anesthesiologists. Associated risks have attracted increasing attention because they range from minor facial soft tissue injuries to catastrophic complications such as stroke or postoperative blindness. Earlier, we reported on the use of a boxing sports helmet for simple and easy positioning of the head. However, as available helmets are limited in sizes and materials, that system is not easily transferable to children. Therefore, we sought to create a face and head protection device for children undergoing procedures in prone position. We re-engineered a standard boxing sports helmet making it suitable as an on-head support cushion. By using WHO standard growth charts, various sizes were calculated and prototypes of different foam materials produced. Facial surface pressures were measured in 15 volunteers. A lightweight foam-based face mask was created. Minimum necessary foam thickness was 2.5 cm. Different materials were tested and pressure in different facial zones never exceeded 30 mmHg. Bringing a face protection device onto the patient's face instead of placing the face into support cushions is an elegant way of keeping control over airway devices and providing support for facial structures in various positions simultaneously. Skin surface pressure on facial structures remained low due to the specific mask design and choice of foam materials, which could lead to decreased incidences of undesired sequelae of prone position such as skin damage or even more devastating complications.

  19. [The effects of wearing protective devices among residents and volunteers participating in the cleanup of the Hebei Spirit oil spill].

    Science.gov (United States)

    Lee, Seung-Min; Ha, Mina; Kim, Eun-Jung; Jeong, Woo-Chul; Hur, Jongil; Park, Seok Gun; Kwon, Hojang; Hong, Yun-Chul; Ha, Eun-Hee; Lee, Jong Seung; Chung, Bong Chul; Lee, Jeongae; Im, Hosub; Choi, Yeyong; Cho, Yong-Min; Cheong, Hae-Kwan

    2009-03-01

    To assess the protective effects of wearing protective devices among the residents and volunteers who participated in the cleanup of the Hebei Spirit oil spill. A total of 288 residents and 724 volunteers were surveyed about symptoms, whether they were wearing protective devices and potential confounding variables. The questionnaires were administered from the second to the sixth week following the accident. Spot urine samples were collected and analyzed for metabolites of 4 volatile organic compounds (VOCs), 2 polycyclic aromatic hydrocarbons (PAHs), and 6 heavy metals. The association between the wearing of protective devices and various symptoms was assessed using a multiple logistic regression adjusted for confounding variables. A multiple generalized linear regression model adjusted for the covariates was used to test for a difference in least-square mean concentration of urinary biomarkers between residents who wore protective devices and those who did not. Thirty nine to 98% of the residents and 62-98% of volunteers wore protective devices. Levels of fatigue and fever were higher among residents not wearing masks than among those who did wear masks (odds ratio 4.5; 95% confidence interval 1.23-19.86). Urinary mercury levels were found to be significantly higher among residents not wearing work clothes or boots (plevels between people who wore protective devices and those who did not, except for mercury, whose biological half-life is more than 6 weeks.

  20. Research on Experiment of Islanding Protection Device of Grid-connected Photovoltaic System Based on RTDS

    Science.gov (United States)

    Zhou, Ning; Yang, Jia; Cheng, Zheng; Chen, Bo; Su, Yong Chun; Shu, Zhan; Zou, Jin

    2017-06-01

    Solar photovoltaic power generation is the power generation using solar cell module converting sunlight into DC electric energy. In the paper an equivalent model of solar photovoltaic power generation system is built in RTDS. The main circuit structure of the two-stage PV grid-connected system consists of the DC-DC, DC-AC circuit. The MPPT (Maximum Power Point Tracking) control of the PV array is controlled by adjusting the duty ratio of the DC-DC circuit. The proposed control strategy of constant voltage/constant reactive power (V/Q) control is successfully implemented grid-connected control of the inverter when grid-connected operation. The closed-loop experiment of islanding protection device of photovoltaic power plant on RTDS, verifies the correctness of the simulation model, and the experimental verification can be applied to this type of device.

  1. A simple device to protect against osteoradionecrosis induced by interstitial irradiation

    International Nuclear Information System (INIS)

    Levendag, P.C.; Visch, L.L.; Driver, N.

    1990-01-01

    The incidence of osteoradionecrosis has declined since the introduction of preventive oral hygiene programs and meticulous dental evaluations before and after irradiation. Nevertheless, radiation dose per se still remains an important factor in osteoradionecrosis. Interstitial radiation has received much attention in the past decade since the use of flexible afterloading systems. It has become common practice in large oncology centers to implant radiation carriers in bulky tumor in the oral cavity and/or oropharynx. For interstitial radiation, with or without external radiation, minimal tumor doses are often cited to be more than 70 Gy. Unfortunately, if the mandible receives more than 70 Gy, it is at risk for the development of osteoradionecrosis. Therefore a simple protective lead device has been designed for routine use in brachytherapy in oral cavity tumors to reduce the dose to the mandible. This device will diminish the potential risk of osteoradionecrosis development

  2. Related factors to workers' use of hearing protection device in knitting & ppinning factories of Yazd city based on Protection Motivation Theory

    Directory of Open Access Journals (Sweden)

    A. Barkhordi

    2009-10-01

    Full Text Available Background and aimsNoise-Induced Hearing Loss (NIHL is an important occupational disorder. High percentage of workers in occupational environments did not use the hearing protection device against harmful noise. This study was carried out to study factors related to workers' use of Hearing protection Device in Knitting & spinning factories of Yazd city based on protection motivation theory.MethodsIn this cross-sectional analytical study 280 workers of the knitting & spinning factories of Yazd City who exposed to harmful noise (over 85dB selected among the three factories by cluster sampling. The data gathered via exclusive interviews with selected workers  using the questionnaire designed based on protection motivation theory and were analyzedResults42/5 percent of workers permanently used hearing protection devices, and 20/7 percent of workers never use.There was a significant correlation between the age of workers and the mean score components of PMT; perceived severity, perceived vulnerability, perceived response efficacy and protection motivation. There was also a significant correlation between the work experience and the mean score of PMT factors; perceived severity, perceived response efficacy and perceived vulnerability. Also there was a significant correlation between workers' education level and the mean score of perceived response efficacy and there was a significant correlation between protection motivation and the mean score components of PMT; perceived vulnerability, perceived self-efficacy, perceived response efficacy, perceived costs and behaviorConclusionRegarding the significant correlations between the more constructs of PMT and protection motivation of workers for using hearing protective device, designing educational program based on PMT to increase hearing protection devices usage among workers is recommended.

  3. Security Hi-tech Individual Extra-light Device Mask: a new protection for [soccer] players.

    Science.gov (United States)

    Cascone, Piero; Petrucci, Bernardino; Ramieri, Valerio; Marianetti, Titto Matteo; TitoMatteo, Marianetti

    2008-05-01

    Among professional [soccer] players, a relevant incidence of maxillofacial trauma has been reported. The main challenge in these particular patients is to give them the possibility of a very short convalescence period and to make possible their agonistic activity as soon as possible. The authors here present an innovative technique to realize this--the Security Hi-tech Individual Extra-Light Device Mask, a customizable protective shield based on the player's face cast. A completely customized mask was forged over the player's face cast to protect the injured area. This mask shortens convalescence period, and due to its realization, it is comfortable and easy fitting, thus allowing the player to perform at a professional level in his sport activity in the shortest time possible.

  4. Improvement of the protection devices for JT-60U LHRF antenna system

    International Nuclear Information System (INIS)

    Suzuki, Sadaaki; Seki, Masami; Shinozaki, Shinichi; Sato, Fumiaki; Hiranai, Shinichi; Hasegawa, Koichi; Moriyama, Shinichi; Ishii, Kazuhiro

    2007-09-01

    In the experiments featuring lower hybrid range of frequency (LHRF) system in JT-60U, carbon grills were attached to the plasma-facing part of the antenna in order to avoid the damage by the excessive heat load from the plasma. However some electric discharge traces were found there in the observation after the experiments. To avoid such discharges, improvements of the arc detector and the protection interlock by visible picture detection were tackled. In the arc detector, the amplification circuit was improved in order to obtain shorter response time and higher resolution of optical detection. Moreover, in visible picture detection, a new function of RF-on/off control utilizing PC image processing was added to distinguish the light of the arc from one of the plasma. This report summarizes improvement of the protection interlock device in a LHRF heating system. (author)

  5. Efficiency of filtering materials used in respiratory protective devices against nanoparticles.

    Science.gov (United States)

    Brochocka, Agnieszka; Makowski, Krzysztof; Majchrzycka, Katarzyna; Grzybowski, Piotr

    2013-01-01

    The basic aim of this research was to establish the efficiency of filtering materials widely used in respiratory protection devices with particular interest in their porosity, degree of electric and changeable process parameters, such as the flow rate of the test nanoaerosol and the size range of nanoparticles. Tests were carried out with an NaCl solid aerosol of 3.2 × 105 particles/cm3 for the range of particle size of 7-270 nm, at aerosol flow rate of 1800, 2700, 3600, 4500 and 5400 L/h. The tests showed that electrospun nonwovens were the most effective filtering materials for nanoparticles over 20 nm. Melt-blown electret nonwovens with lower porosity than electrospun nonwovens had higher values of penetration of 1%-4%. Those materials provided very efficient protection against nanoparticles of certain sizes only.

  6. Design And Development Of An Automatic Single Phase Protective Device Using Ssr

    Directory of Open Access Journals (Sweden)

    Michael E.

    2017-10-01

    Full Text Available Since the discovery of energy safety has been a paramount subject matter. This we can see in todays electrical systems where protective devices such as fuse and circuit breakers are used to prevent fire hazards resulting from overload overvoltage and short circuits. However with all the revolution in technology these options may be considered less smart since the fuse made with wire strands calculated for specific current capacity faults permanently when the specified current rating is exceeded. While the circuit breaker which is made up of mechanical switch fails as a result of carbon forming and the wearing away of the contacts because of arcing. As a means of improvement this paper presents the design and development of an automatic single phase protective device using solid state relay SSR. This study is to ensure automatic cut off from power supply in cases of overvoltage above 240 V AC or when overload and short circuit current above 8amps is detected without permanent damage of a fuse placed along current path. Also the design will ensure that there is an automatic close circuit whenever the trigger switch is momentary switch is closed. The system is achieved via the use of PIC micro-controller current sensor and other discrete components. The system is tested and works well inhibiting the frequent faulting of fuses. It also helps to prevent hazard as a result of overvoltage overload and short circuit and ensures a close circuit when the trigger switch is closed.

  7. Absorbed doses by a technician, with and without (simulating) use of protection devices, in bone scintigraphy examination

    International Nuclear Information System (INIS)

    Jesus Lopes Filho, F. de; Antonio Filho, J.; Colaco, W.; Silveira, S.V. da

    1992-01-01

    The relation between the whole-body dose and the dose localized in body pants of a technician work in nuclear medicine was investigated by dosimetric films and thermoluminescent dosemeters. The investigation was made with and without a suitable protection devices. The results were discussed by a radiological protection view. (C.G.C.)

  8. The use of hearing protection devices with approach risk perception of noise induced hearing loss in several manufacturing industry

    Directory of Open Access Journals (Sweden)

    Behzad Fouladi Deahghi

    2015-06-01

    Full Text Available Background & Objective : Noise is a widespread physical agent and although is a most risk factors in workplaces that workers of health to exposed. Thus, different actions is done for reduce exposure to it in work places, which one of them is use of hearing protection devices. The use of hearing protection devices with approach risk perception of noise induced hearing loss in several manufacturing industry Method: This study was Cross-sectional study and done in five industrial unit with a sound pressure level more of 85 dB-A with the participation of 340 workers. To collect data , individual risk perception and self-investigator questionnaires were used. After collecting data, statistical analysis including Cronbach's alpha and regression were used to analyze the data. Results : Range use of hearing protection devices during shifts work by workers, respectively equal to: 50.4% sometimes, 31.58% never and 18.2% at all times. Also, results indicate significant differences between individual differences and hearing protection devices. Conclusion : Results of this study showed that individual risk perception as an important factor, can do a significant role in predicting the behavior of personals in the use of hearing protection devices, which should be considered in any design and implementation of hearing protection program.

  9. New challenge for the radiation protection: devices for the radioactivity dispersion

    International Nuclear Information System (INIS)

    Mora, J. C.; Robles, B.; Cancio, C.

    2006-01-01

    In recent years the terrorist attacks produced in several countries have changed the mind of the security experts. This has also included the Radiation Protection aspects. Newly considered features have required the update of emergency response and preparedness, ad well as a greater emphasis on security. Within the Radiation Protection field has been introduced the radiological and nuclear terrorism definition. almost every organism and research centre involved in Radiation Protection is nowadays working on. The possible terrorist attack scenarios have already been defined and the use of an explosive to disperse radioactive material, known as a Radiation Dispersion Devices (RDD), has been specified as the most probable one. Studies to mitigate against the chance of attack and to mitigate the consequences of any attack with a RDD are complex, due to the innovation that introduce. This leads to a need to take some immediate preventative actions and to carry out additional R and D efforts. This document presents some considerations on the possible RDD design and behaviour in order to prevent and prepare against a possible attack. (Author) 17 refs

  10. Investigation of Vehicle Rear Under Run Protection Device (RUPD) Using Aluminium Foam

    Science.gov (United States)

    Nagaraj Goud, B.; pachori, Avinash

    2017-08-01

    Whenever the passenger cars meet with accidents with the heavy duty truck from rear, it will tend to penetrate under the truck bed called truck trailer under-ride crash. This is responsible for the thousands of accidents, causing severe injuries and spot death. This is mostly due to the lack of effective guarding system. The Present paper gives an importance on energy absorption mechanism of a Rear under Run Protection Device (RUPD) under crash effect of the truck. The aim of the study is to replace Steel RUPD with aluminum foam, which promises an improvement of vehicle crashworthiness as well as to reduce weight of the vehicle. The aluminum foam is selected due to the high specific strength and specific stiffness. This inborn character makes it a promising candidate in the modern lightweight structures in the automotive engineering which can contribute to the improvement of mileage in addition to safety of the occupants.

  11. Protecting Touch: Authenticated App-To-Server Channels for Mobile Devices Using NFC Tags

    Directory of Open Access Journals (Sweden)

    Fernando Kaway Carvalho Ota

    2017-07-01

    Full Text Available Traditional authentication methods (e.g., password, PIN often do not scale well to the context of mobile devices in terms of security and usability. However, the adoption of Near Field Communication (NFC on a broad range of smartphones enables the use of NFC-enabled tokens as an additional authentication factor. This additional factor can help to improve the security, as well as usability of mobile apps. In this paper, we evaluate the use of different types of existing NFC tags as tokens for establishing authenticated secure sessions between smartphone apps and web services. Based on this evaluation, we present two concepts for a user-friendly secure authentication mechanism for mobile apps, the Protecting Touch (PT architectures. These two architectures are designed to be implemented with either end of the spectrum of inexpensive and widely-available NFC tags while maintaining a reasonable trade-off between security, availability and cost.

  12. Pictorial essay: Distal colostography

    Directory of Open Access Journals (Sweden)

    Rahalkar Mukund

    2010-01-01

    Full Text Available Distal colostography (DC, also called distal colography or loopography, is an important step in the reparative management of anorectal malformations (ARMs with imperforate anus, Hirschsprung′s disease (occasionally and colonic atresia (rarely in children and obstructive disorders of the distal colon (colitis with stricture, carcinoma or complicated diverticulosis in adults. It serves to identify/confirm the type of ARM, presence/absence of fistulae, leakage from anastomoses, or patency of the distal colon. We present a pictorial essay of DC in a variety of cases.

  13. Weibull aging models for the single protective channel unavailability analysis by the device of stages

    International Nuclear Information System (INIS)

    Nunes, M.E.C.; Noriega, H.C.; Melo, P.F.F.

    1997-01-01

    Among the features to take into account in the unavailability analysis of protective channels, there is one that plays a dominant role - that of considering the equipment aging. In this sense, the exponential failure model is not adequate, since some transition rates are no more constant. As a consequence, Markovian models cannot be used anymore. As an alternative, one may use the device of stages that allows for transforming a Non Markovian model into an equivalent Markovian one by insertion of a fictitious states set, called stages. For a given time-dependent transition rate, its failure density is analysed as to the best combination of exponential distributions and then the moments of the original distribution and those of the combination are matched to estimate the necessary parameters. In this paper, the aging of the protective channel is supposed to follow Weibull distributions. Typical means and variances for the times to failure are considered and combinations of stages are checked. Initial conditions features are discussed in connection with states that are fictitious and to check the validity of the developed models. Alternative solutions by the discretization of the failure rates are generated. The results obtained agree quite well. (author). 7 refs., 6 figs

  14. Gender differences in use of hearing protection devices among farm operators

    Directory of Open Access Journals (Sweden)

    Marjorie C McCullagh

    2016-01-01

    Full Text Available Purpose: Although farm operators have frequent exposure to hazardous noise and high rates of noise-induced hearing loss, they have low use of hearing protection devices (HPDs. Women represent about one-third of farm operators, and their numbers are climbing. However, among published studies examining use of HPDs in this worker group, none have examined gender-related differences. The purpose of this study was to examine gender-related differences in use of hearing protection and related predictors among farm operators. Materials and Methods: Data previously collected at farm shows and by telephone were analyzed using t-tests and generalized linear model with zero inflated negative binomial (ZINB distribution. Findings: The difference in rate of hearing protector use between men and women farm operators was not significant. There was no difference between men and women in most hearing protector-related attitudes and beliefs. Conclusion: Although men and women farm operators had similar rates of use of hearing protectors when working in high-noise environments, attitudes about HPD use differed. Specifically, interpersonal role modeling was a predictor of HPD use among women, but not for men. This difference suggests that while farm operators of both genders may benefit from interventions designed to reduce barriers to HPD use (e.g., difficulty communicating with co-workers and hearing warning sounds, farm women have unique needs in relation to cognitive-perceptual factors that predict HPD use. Women farm operators may lack role models for use of HPDs (e.g., in peers and advertising, contributing to their less frequent use of protection.

  15. Distal digital replantation.

    Science.gov (United States)

    Jazayeri, Leila; Klausner, Jill Q; Chang, James

    2013-11-01

    Hand surgeons have been hesitant to perform distal digital replantation because of the technical challenges and the perception of a high cost-to-benefit ratio. Recent studies, however, have shown high survival rates and excellent functional and aesthetic results, providing renewed enthusiasm for distal replantation. The authors reviewed the literature and summarize key points regarding the surgical treatment, perioperative care, and outcomes of distal digital replantation. They describe specific techniques and considerations for surgical repair in each of four distal zones as described by Sebastin and Chung. Zone 1A replantation involves an artery-only anastomosis of a longitudinal pulp artery. Venous anastomosis first becomes possible in zone 1B. Zone 1C involves periarticular amputations where arthrodesis of the distal interphalangeal joint is usually indicated. Repair of the artery, vein, and nerve is technically optimal in zone 1D, where venous anastomosis should be performed. Overall, survival rates for distal digital replantation are similar to those reported for more proximal replantation. The literature reports good outcomes regarding nail salvage, fingertip sensibility, and range of motion, with restoration of length and aesthetic appearance. Distal replantation performed at institutions that specialize in microsurgery and specifically tailored to the level of injury is associated with good survival, function, and patient satisfaction and superior aesthetic outcome. More prospective data are needed to evaluate the cost of treatment, psychological outcomes, and functional outcomes of distal replantation compared with revision amputation.

  16. Evaluation of the Survivability of Microorganisms Deposited on Filtering Respiratory Protective Devices under Varying Conditions of Humidity

    OpenAIRE

    Majchrzycka, Katarzyna; Okrasa, Ma?gorzata; Sk?ra, Justyna; Gutarowska, Beata

    2016-01-01

    Bioaerosols are common biological factors in work environments, which require routine use of filtering respiratory protective devices (FRPDs). Currently, no studies link humidity changes in the filter materials of such devices, during use, with microorganism survivability. Our aim was to determine the microclimate inside FRPDs, by simulating breathing, and to evaluate microorganism survivability under varying humidity conditions. Breathing was simulated using commercial filtering facepiece re...

  17. Application of Detailed Phase Comparison Protection Models for the Analysis of its Operation in Networks with Facts Devices

    Directory of Open Access Journals (Sweden)

    Ruban Nikolay Yu.

    2015-01-01

    Full Text Available The problem of relay protection misoperations in networks with FACTS devices is considered in the paper. It is offered a solution to this problem for a phase comparison protection of transmission power line through the use of its detailed model for the analysis of the functioning for a case of various normal, emergency and post-emergency modes of electric power systems. The research results of this approach are given in the paper.

  18. A NEW CROWBAR SYSTEM FOR THE PROTECTION OF HIGH POWER GRIDDED TUBES AND MICROWAVE DEVICES

    Energy Technology Data Exchange (ETDEWEB)

    S.G.E. PRONKO; T.E.HARRIS

    2001-04-01

    As part of the electron cyclotron heating (ECH) facility upgrade at the DIII-D National Fusion Facility, two 8.4 MW modulator/regulator power systems were designed and constructed (Ref. 1). Each power system uses a high power tetrode to modulate and regulate the cathode voltage for two 1 MW-class 110 GHz gyrotrons (Ref. 2). A critical element in the power system is the fault energy divertor, or crowbar switch, that protects the tetrode and the gyrotrons in the event of an arc fault. Traditionally, mercury filled ignitron switches are used for this application, but it was desired to eliminate hazardous materials and improve overall switching performance. The new crowbar switch system was required to meet the following requirements: Operating voltage: -105 kVdc; Peak current (750 ms e-fold): 1.6 kA; Follow-on current: <1 kA (25 ms); Charge transfer per shot: <15 Cb; and Turn-on time: <1 {micro}s. The switch that was chosen for the new design is a low pressure deuterium filled device, called a metal-arc thyratron, manufactured by Marconi Applied Technologies (Ref. 3). In addition to the new crowbar switch assembly, improved fault signal processing circuitry was developed. This new circuitry uses fiber-optics for signal and trigger transmission and a complex programmable logic device for high speed signal and logic processing. Two generations of metal-arc thyratrons have been commissioned in the two ECH power systems constructed at DIII-D. In the first, the crowbar system performed extremely well, meeting all of the operating requirements and demonstrating its ability to protect a 36 gauge copper wire from fusing (energy let-through <10 J). However, after accumulating over 500 shots, the metal-arc thyratrons lost their ability to reliably hold-off voltage. This problem was solved by Marconi with a design modification of the thyratron electrodes. The second generation tubes were installed in the second ECH power system. The crowbar system was fully commissioned and all

  19. A New Orthodontic Appliance with a Mini Screw for Upper Molar Distalization.

    Science.gov (United States)

    Ozkalayci, Nurhat; Yetmez, Mehmet

    2016-01-01

    The aim of this study is to present a new upper molar distalization appliance called Cise distalizer designed as intraoral device supported with orthodontic mini screw for upper permanent molar distalization. The new appliance consists of eight main components. In order to understand the optimum force level, the appliance under static loading is tested by using strain gage measurement techniques. Results show that one of the open coils produces approximately 300 gr distalization force. Cise distalizer can provide totally 600 gr distalization force. This range of force level is enough for distalization of upper first and second molar teeth.

  20. A New Orthodontic Appliance with a Mini Screw for Upper Molar Distalization

    Directory of Open Access Journals (Sweden)

    Nurhat Ozkalayci

    2016-01-01

    Full Text Available The aim of this study is to present a new upper molar distalization appliance called Cise distalizer designed as intraoral device supported with orthodontic mini screw for upper permanent molar distalization. The new appliance consists of eight main components. In order to understand the optimum force level, the appliance under static loading is tested by using strain gage measurement techniques. Results show that one of the open coils produces approximately 300 gr distalization force. Cise distalizer can provide totally 600 gr distalization force. This range of force level is enough for distalization of upper first and second molar teeth.

  1. Review of interventions to increase hearing protective device use in youth who live or work on farms.

    Science.gov (United States)

    Sherman, Crystal R; Azulay Chertok, Ilana R

    2014-01-01

    To identify and compare hearing protection interventions for youth working and living on farms. Noise-induced hearing loss represents a significant risk factor for injury, disability and death in agricultural populations due to an inability to receive sensory information that can indicate dangerous situations. Despite the availability of hearing protection devices, rates of utilisation remain low, while rates of noise-induced hearing loss are high within the agricultural youth population. Comprehensive review of the literature. Electronic database searches were conducted to identify research studies of hearing protection interventions for youth living or working on farms. Three intervention studies were identified as meeting the review criteria, with additional reanalysis studies based on the original intervention studies. The intervention studies demonstrated increased use of hearing protection devices among youth who received the interventions compared to the control groups although audiometry testing results were not improved as a result of the intervention. The findings of this review highlight the need for additional research into the effectiveness of hearing protection device use as a noise-induced hearing loss preventative measure in youth who live or work on farms and the creation of effective interventions to increase hearing protection device use and decrease Noise-induced hearing loss risk. It is recommended that nurses be educated in the areas of health promotion relevant to farming communities to be able to effectively meet their rural clients' needs in relation to noise-induced hearing loss. Working with youth, families, and schools, as well as developing community partnerships, can facilitate the dissemination of hearing protection promotion. © 2013 Blackwell Publishing Ltd.

  2. Acceptance and Use of Protective Stabilization Devices by Pediatric Dentistry Diplomates in the United States.

    Science.gov (United States)

    Davis, Dustin M; Fadavi, Shahrbanoo; Kaste, Linda M; Vergotine, Rodney; Rada, Robert

    2016-01-01

    To assess acceptance and use of protective stabilization devices (PSD) by Pediatric Dentistry Diplomates. Surveys were electronically mailed in 2013 to 2922 members of the American Board of Pediatric Dentistry's (ABPD) College of Diplomates. Bivariate (assessing provider personal and practice characteristics) and multivariate analyses were performed on reported acceptance and use of PSD. Response rate was 28 percent. Providers more likely to report acceptance and use of PSD were those in practices with lower SES patient base, where there was the perception that patients' parents were more accepting of PSD, and those with low patient volume. Provider who were more likely to report acceptance and use of PSD were female, not working solely in private practice, and from Southeast or North Central regions of the U.S. Neither PSD use during residency nor ABPD Board cohort (<2009 versus 2009-2013) was associated with current acceptance or PSD use. Upon multivariate assessments of practice and personal characteristics, only perception of parent acceptance was associated with provider acceptance whereas perception of parental acceptance, practitioner sex and practice setting were associated with provider use of PSD. Practitioner sex, practice setting, region, and perception of parental acceptance are all important factors related to PSD acceptance and use.

  3. Percutaneous renal angioplasty and stenting: application of embolic protection device in patients with normal renal function

    International Nuclear Information System (INIS)

    Tong Xiaoqiang; Yang Ming; Wang Jian; Song Li; Wang Chao; Lv Yongxing; Sun Hongliang; Zou Yinghua; Yin Ming

    2007-01-01

    Objective: To investigate the Value of embolic protection device (EPD)in renal artery stenting (RAS)for the patients with normal renal function. Methods: Total 24 patients (26 renal arteries) suffering from renal artery stenosis with normal serum creatinine were divided into two groups: EPD group (n12)and non-EPD group (n=12). Serum creatinine was calculated and analized statistically between the two groups, 1 month and 6months after stenting respectively, and followed by comparisons taking inside of each group and between both groups. Results: Serum creatinine of the EPD and non-EPD groups before, 1 month and 6 month after stenting were(99.18 ± 18.26) μmol/L, (101.73 ± 12.65) μmol/L, (96.82 ± 15.81) μmol/L and (100.18 ± 19.81) μmol/L, (107.36 ± 29.49) μmol/L, (127.64 ± 88.05) μmol/L, respectively; showing no significant difference inside each group individually (P>0.05), and also no statistically significant difference between the two groups (P>0.05). Conclusion: For the patients suffering from renal artery stenosis with normal serum creatinine, application of EPD may have no impact on renal function. Further evaluation is needed. (authors)

  4. Optical-electronic device based on diffraction optical element for control of special protective tags executed from luminophor

    Science.gov (United States)

    Polyakov, M.; Odinokov, S.

    2017-05-01

    The report focuses on special printing industry, which is called secure printing, which uses printing techniques to prevent forgery or falsification of security documents. The report considered the possibility of establishing a spectral device for determining the authenticity of certain documents that are protected by machine-readable luminophor labels. The device works in two spectral ranges - visible and near infrared that allows to register Stokes and anti-Stokes spectral components of protective tags. The proposed device allows verification of the authenticity of security documents based on multiple criteria in different spectral ranges. It may be used at enterprises related to the production of security printing products, expert units of law enforcement bodies at check of authenticity of banknotes and other structures.

  5. Giant distal humeral geode

    International Nuclear Information System (INIS)

    Maher, M.M.; Kennedy, J.; Hynes, D.; Murray, J.G.; O'Connell, D.

    2000-01-01

    We describe the imaging features of a giant geode of the distal humerus in a patient with rheumatoid arthritis, which presented initially as a pathological fracture. The value of magnetic resonance imaging in establishing this diagnosis is emphasized. (orig.)

  6. To a question on thermal protection of constructional elements of vacuum-plasma devices

    International Nuclear Information System (INIS)

    Borisko, V.N.; Borisko, S.V.; Zinovev, D.V.; Lapshin, V.I.; Tselujko, A.F.

    2005-01-01

    The progress in development of vacuum-plasma devices is connected with the design and creation of constructional elements from materials, which have a high erosion resistance and can maintain the large specific flux of energy per effective area. Recently as the materials of such constructional elements it was offered to use the reversible sorbents of hydrogen of Zr-V system, which have high-rates of sorption-desorption and large thermal effect of the hydride phases decomposition. In the paper an experimental research of the thermal conditions features of the metal-hydride electrodes, which subjected of the energy loads in the vacuum-plasma devices, are given. The simulation of the energy loads on the electrodes was carried out with the help of gas discharge plasma as there is an possibility to vary the energy spectrum of the bombarding particles and to gather a necessary radiation dose to the material surface. For comparative examinations of various materials under the irradiation by high-energy heavy particles it is the most convenient to use the Penning discharge. In this case, the cathodes made of different materials are under the identical conditions even at the change of working discharge modes. Therefore in the device on the basis of the Penning discharge the cathodes of metal-hydride and stainless steel were set. It was detected, that the increase of the temperature gradient of metal-hydride cathode goes down with the increase of discharge current value. The dependence of operating temperatures difference of cathodes from exposure time has shown that the temperature of the metal-hydride cathode is sufficiently lower than the temperature of the stainless steel cathode. Such a softening of the thermal operation conditions of the metal hydride cathode is caused by thermal decomposition of hydride phases. Besides there is the energy flow dissipation of bombarding particles on the protective gas target formed by desorbed hydrogen. The considerable decrease of

  7. Computer simulation and radiation hardening of power devices to protect against failures induced by heavy ions

    International Nuclear Information System (INIS)

    Lorfevre, E.; Detcheverry, C.; Sudre, C.; Bruguier, G.; Palau, J.M.; Roubaud, F.

    1997-01-01

    Power devices such as MOSFETSs and IGBTs, include parasitic structures that can give rise to destructive failures such as breakdown and latch-up. To determine a suitable strategy for device radiation hardening, simulation software like MEDICI-2D can be used to model the effects of technological modifications and device parameters that are difficult to measure experimentally. (authors)

  8. Distal driving of molar by smart distal-propeller appliance

    Directory of Open Access Journals (Sweden)

    U H Vijayashree

    2018-01-01

    Full Text Available In recent years, maxillary molar distalization with noncompliance mechanics has been an increasingly popular method for the resolution of Class II malocclusion. This communication describes one particular molar distalizing appliance, the Smart distal-propeller appliance which is simple, inexpensive, easily fabricated that can be used for unilateral or bilateral molar distalization.

  9. Multicriteria Analysis model for the comparison of different rockfalls protection devices

    Science.gov (United States)

    Mignelli, C.; Pomarico, S.; Peila, D.

    2012-04-01

    which provides a comparison of the considered options. The developed model takes into account five different aspects of the decision-making process (economic, environmental, design, transport and social aspects) that have been organized according the hierarchical framework of the AHP technique. The criteria that were identified in the analysis and their weights, in the decision-making process, have been discussed and determined by means of specific focus groups with technical experts in the geo-engineering field. Three different protection devices, usually used for rockfall protection (embankment, shelter topped by rockfall barrier and tunnel), are compared through the AHP method, in a specific "geo" environment to show the feasibility of the method. The application of the AHP technique, which was performed using the Expert Choice software, allowed the most relevant aspects of the decision-making process to be highlighted and showing how the proposed method can be a valuable tool for public administration. Furthermore, in order to test the robustness of the proposed model a sensitivity analysis was carried out. The research has an originality value since it focuses on a participative methodological approach thus making the decision process more traceable and reliable.

  10. Measurement of hearing protection devices performance in the workplace during full-shift working operations.

    Science.gov (United States)

    Nélisse, Hugues; Gaudreau, Marc-André; Boutin, Jérôme; Voix, Jérémie; Laville, Frédéric

    2012-03-01

    The effectiveness of hearing protection devices (HPDs), when used in workplace conditions, has been shown over the years to be usually lower than the labeled values obtained under well-controlled laboratory conditions. Causes for such discrepancies have been listed and discussed by many authors. This study is an attempt to understand the issues in greater details and quantify some of these factors by looking at the performance of hearing protectors as a function of time during full work shift conditions. A non-invasive field microphone in the real ear (F-MIRE)-based method has been developed for measuring the effectiveness of different HPDs as a function of time in the workplace. Details of the test procedures, the equipment used, and the post-processing operations are presented and discussed. The methodology was developed in such a way that a complete time and frequency representation are possible. The system was used on a total of 24 workers in eight different companies. Work shifts of up to 9-h long were recorded. Various types of earmuffs and one type of molded earplugs were tested. Attenuation data reported as a function of time showed, for most workers tested, considerable fluctuations over entire work shift periods. Parts of these fluctuations are attributed to variations in the low-frequency content in the noise (in particular for earmuffs) as well as poor insertion and/or fitting of earplugs. Lower performances than laboratory-based ones were once again observed for most cases tested but also, important left and right ear differences were obtained for many individuals. When reported as a function of frequency, the attenuation results suggested that the few approximations used to relate the measurements to subjective real-ear-attenuation-at-threshold (REAT) data were realistic. The use of individualized attenuation data and performance ratings for HPDs as well as a good knowledge of the ambient noise in the workplace are key ingredients when evaluating the

  11. Soft tissue conduction as a possible contributor to the limited attenuation provided by hearing protection devices

    Directory of Open Access Journals (Sweden)

    Shai Chordekar

    2016-01-01

    Full Text Available Context: Damage to the auditory system by loud sounds can be avoided by hearing protection devices (HPDs such as earmuffs, earplugs, or both for maximum attenuation. However, the attenuation can be limited by air conduction (AC leakage around the earplugs and earmuffs by the occlusion effect (OE and by skull vibrations initiating bone conduction (BC. Aims: To assess maximum attenuation by HPDs and possible flanking pathways to the inner ear. Subjects and Methods: AC attenuation and resulting thresholds were assessed using the real ear attenuation at threshold (REAT procedure on 15 normal-hearing participants in four free-field conditions: (a unprotected ears, (b ears covered with earmuffs, (c ears blocked with deeply inserted customized earplugs, and (d ears blocked with both earplugs and earmuffs. BC thresholds were assessed with and without earplugs to assess the OE. Results: Addition of earmuffs to earplugs did not cause significantly greater attenuation than earplugs alone, confirming minimal AC leakage through the external meatus and the absence of the OE. Maximum REATs ranged between 40 and 46 dB, leading to thresholds of 46–54 dB HL. Furthermore, calculation of the acoustic impedance mismatch between air and bone predicted at least 60 dB attenuation of BC. Conclusion: Results do not support the notion that skull vibrations (BC contributed to the limited attenuation provided by traditional HPDs. An alternative explanation, supported by experimental evidence, suggests transmission of sound to inner ear via non-osseous pathways such as skin, soft tissues, and fluid. Because the acoustic impedance mismatch between air and soft tissues is smaller than that between air and bone, air-borne sounds would be transmitted to soft tissues more effectively than to bone, and therefore less attenuation is expected through soft tissue sound conduction. This can contribute to the limited attenuation provided by traditional HPDs. The present study

  12. Social marketing campaign promoting the use of respiratory protection devices among farmers.

    Science.gov (United States)

    Pounds, Lea; Duysen, Ellen; Romberger, Debra; Cramer, Mary E; Wendl, Mary; Rautiainen, Risto

    2014-01-01

    This article describes the formal use of marketing concepts in a systematic approach to influence farmers to voluntarily increase respiratory protective device (RPD) use. The planning process for the project incorporated six key decision or action points, each informed by formative research or health behavior theory. The planning process included developing behavior change strategies based on a 4P model (product, price, place, and promotion). The resulting campaign elements included print and e-mail messages that leveraged motivators related to family and health in order to increase farmers' knowledge about the risks of exposure to dusty environments, four instructional videos related to the primary barriers identified in using RPDs, and a brightly colored storage bag to address barriers to using RPDs related to mask storage. Campaign implementation included a series of e-mails using a bulk e-mail subscription service, use of social media in the form of posting instructional videos on a YouTube channel, and in-person interactions with members of the target audience at farm shows throughout the Central States Center for Agricultural Safety and Health seven-state region. Evaluation of the e-mail campaigns indicated increased knowledge about RPD use and intent to use RPDs in dusty conditions. YouTube analytic data indicated continuing exposure of the instructional videos beyond the life of the campaign. The project demonstrates the efficacy of a planning process that incorporates formative research and clear decision points throughout. This process could be used to plan health behavior change interventions to address other agriculture-related health and safety issues.

  13. Effects of falling weight impact on industrial safety helmets used in conjunction with eye and face protection devices.

    Science.gov (United States)

    Baszczyński, Krzysztof

    2018-06-01

    Industrial workplaces pose concurrent hazards to the upper part of the head and the eyes. Under the circumstances, workers may use protective helmets in conjunction with protective goggles or spectacles. In order to assess the compatibility of this equipment, a method and a test stand for evaluating the behavior of safety helmets and protective goggles/spectacles upon the impact of a falling weight were designed. The results of tests concerning the displacement and deformation of helmets and spectacles/goggles, the forces acting on the helmets, as well as the forces exerted by the spectacles/goggles on the headform upon falling weight impact are presented. The results revealed the ways in which the tested equipment interacted with each other. The influence of equipment construction on the test results was analyzed and inferences concerning the safety of the studied protective devices were made. Some general construction guidelines were formulated for the compatibility of the equipment.

  14. Main radiation protection actions for medical personnel as primary responders front of an event with radiological dispersive device

    International Nuclear Information System (INIS)

    Duque, Hildanielle Ramos

    2015-01-01

    After the terrorist attack in New York, USA, in 2001, there was a worldwide concern about possible attacks using radioactive material in conventional detonators, called as Radiological Dispersal Device (RDD) or 'dirty bomb'. Several studies have been and are being made to form a global knowledge about this type of event. As until now, fortunately, there has not been an event with RDD, the Goiania Radiological Accident in Brazil, 1987, is used as a reference for decision-making. Several teams with technical experts should act in an event with RDD, but the medical staffs who respond quickly to the event must be properly protected from the harmful effects of radiation. Based on the radiological protection experts performance during the Goiania accident and the knowledge from lessons learned of many radiological accidents worldwide, this work presents an adaptation of the radiation protection actions for an event with RDD that helps a medical team as primary responders. The following aspects are presented: the problem of radioactive contamination from the explosion of the device in underground environment, the actions of the first responders and evaluation of health radiation effects. This work was based on specialized articles and papers about radiological accidents and RDD; as well as personal communication and academic information of the Institute of Radiation Protection and Dosimetry. The radiation protection actions, adapted to a terrorist attack event with RDD, have as a scenario a subway station in the capital. The main results are: the use of the basic radiation protection principle of time because there is no condition to take care of a patient keeping distance or using a shielding; the use of full appropriate protection cloths for contaminating materials ensuring the physical safety of professionals, and the medical team monitoring at the end of a medical procedure, checking for surface contamination. The main conclusion is that all medical actions

  15. Experimental evaluation of individual protection devices against different types of nanoaerosols: graphite, TiO2, and Pt

    Science.gov (United States)

    Golanski, L.; Guiot, A.; Tardif, F.

    2010-01-01

    In this study different conventional individual protection devices, well-qualified for submicron particles were tested for different types of polydispersed nanoaerosols of TiO2, Pt, and graphite. The electrical mobility diameters of the generated particles are ranging from 9 to 19 nm for Pt, 9 to 90 nm for TiO2, and 15 to 90 nm for graphite. Toward this purpose, two specific test benches were used: one for the filter-based devices which are tested under a controlled air flow, and the other one for protective clothing and gloves under diffusion and without air flow. Different types of nanoaerosols, such as TiO2, Pt, and graphite, were generated. Electrostatic and HEPA (High Efficiency Particle Air) filters have shown the highest efficiency for graphite nanoparticles. The main hypothesis for explaining this effect is that electrostatic forces could enhance the graphite nanoparticles capture. Air-tight fabrics made of non-woven textile seem much more efficient in protecting workers against Pt, and TiO2 nanoparticles than cotton and polypropylene. With regard to protective clothing, no obvious effect linked to the aerosol type was observed. Gloves are found very efficient for TiO2 and Pt nanoaerosols. Therefore, no effect of aerosol on the protection efficiency of gloves was evidenced.

  16. Experimental evaluation of individual protection devices against different types of nanoaerosols: graphite, TiO2, and Pt

    International Nuclear Information System (INIS)

    Golanski, L.; Guiot, A.; Tardif, F.

    2010-01-01

    In this study different conventional individual protection devices, well-qualified for submicron particles were tested for different types of polydispersed nanoaerosols of TiO 2 , Pt, and graphite. The electrical mobility diameters of the generated particles are ranging from 9 to 19 nm for Pt, 9 to 90 nm for TiO 2 , and 15 to 90 nm for graphite. Toward this purpose, two specific test benches were used: one for the filter-based devices which are tested under a controlled air flow, and the other one for protective clothing and gloves under diffusion and without air flow. Different types of nanoaerosols, such as TiO 2 , Pt, and graphite, were generated. Electrostatic and HEPA (High Efficiency Particle Air) filters have shown the highest efficiency for graphite nanoparticles. The main hypothesis for explaining this effect is that electrostatic forces could enhance the graphite nanoparticles capture. Air-tight fabrics made of non-woven textile seem much more efficient in protecting workers against Pt, and TiO 2 nanoparticles than cotton and polypropylene. With regard to protective clothing, no obvious effect linked to the aerosol type was observed. Gloves are found very efficient for TiO 2 and Pt nanoaerosols. Therefore, no effect of aerosol on the protection efficiency of gloves was evidenced.

  17. 30 CFR 77.802 - Protection of high-voltage circuits; neutral grounding resistors; disconnecting devices.

    Science.gov (United States)

    2010-07-01

    ... grounding resistors; disconnecting devices. 77.802 Section 77.802 Mineral Resources MINE SAFETY AND HEALTH... of high-voltage circuits; neutral grounding resistors; disconnecting devices. High-voltage circuits... grounded through a suitable resistor at the source transformers, and a grounding circuit, originating at...

  18. Outcome following distally locked volar plating for distal radius fractures with metadiaphyseal involvement.

    Science.gov (United States)

    Matullo, Kristofer S; Dennison, David G

    2015-06-01

    The surgical treatment of metadiaphyseal distal radius fractures may be difficult due to the associated articular or periarticular extension that limits standard fixation techniques. Longer distal radius volar locking plates allow stable fixation of the distal fragments while providing standard plate fixation in the proximal radius. We hypothesize that this plating technique allows adequate fixation to both the distal radius and metadiaphyseal fragments. The purpose of the study is to describe the outcomes, radiographic parameters, secondary surgeries, and complication rate with this device. A retrospective chart review was conducted on adult patients with a distal radius fracture and metadiaphyseal involvement treated with a volar, distally locked plate. All patients were followed up for radiographic union, with a mean time of 219 days (range 38-575). Fracture patterns, outcomes of range of motion, grip strength, and complications, as well as injury, post open reduction and internal fixation (ORIF), and finally, healed radiographic parameters were recorded. Twenty patients with 21 fractures were included. At union, mean radiographic parameters were the following: volar tilt of 8°, radial inclination of 27°, radial height of 14 mm, and ulnar variance of -1 mm. The mean final range of motion was 52° flexion, 50° extension, 68° pronation, and 66° supination. Complications included one infection and one plate removal. Four patients developed a nonunion requiring secondary procedures. There were no incidents of hardware failure or adhesions requiring tenolysis. Distally locked long volar plating for metadiaphyseal distal radius fractures is a safe and effective treatment option for these complex fracture patterns allowing anatomic restoration of the radial shaft and distal radius.

  19. Protecting computer-based medical devices: defending against viruses and other threats.

    Science.gov (United States)

    2005-07-01

    The increasing integration of computer hardware has exposed medical devices to greater risks than ever before. More and more devices rely on commercial off-the-shelf software and operating systems, which are vulnerable to the increasing proliferation of viruses and other malicious programs that target computers. Therefore, it is necessary for hospitals to take steps such as those outlined in this article to ensure that their computer-based devices are made safe and continue to remain safe in the future. Maintaining the security of medical devices requires planning, careful execution, and a commitment of resources. A team should be created to develop a process for surveying the security status of all computerized devices in the hospital and making sure that patches and other updates are applied as needed. These patches and updates should be approved by the medical system supplier before being implemented. The team should consider using virtual local area networks to isolate susceptible devices on the hospital's network. All security measures should be carefully documented, and the documentation should be kept up-to-date. Above all, care must be taken to ensure that medical device security involves a collaborative, supportive partnership between the hospital's information technology staff and biomedical engineering personnel.

  20. Distal renal tubular acidosis

    Science.gov (United States)

    ... the body's immune system mistakenly attacks healthy tissue Wilson disease , an inherited disorder in which there is too much copper in the body's tissues Use of certain medicines, such as amphotericin B, lithium, and analgesics Symptoms Symptoms of distal renal tubular acidosis include any ...

  1. Design and construction of surge protection devices for rural distribution transformers based on the hygroscopic properties of sand

    Energy Technology Data Exchange (ETDEWEB)

    Arevalo, Liliana; Mejia, Antonio [National University of Colombia, Bogota (Colombia). EMC Research Group], Emails: lparevalog@unal.edu.co, ajmejiau@unal.edu.co; Diaz, Oscar [Universidad Distrital FJC, Bogota (Colombia). School of Technology]. E-mail: ojdiazc@unal.edu.co

    2007-07-01

    The rural distribution transformer failure ratio due to lightning activity is a critical matter in several regions of Colombia. Different research projects have been funded by Colombian electrical companies in order to solve this problem. In some colombian regions, such as Rionegro, Cundinamarca, the transformer failure ratio has been as high as 50%. In different places around the world with a lightning activity similar to our country, the failure ratio has been kept close to 1%. The problem could be solved by developing an integral solution that includes: reduction of grounding resistance and inductive loops, specific transformer design and extensive use of surge arresters on the low and medium voltage transformer windings. The hygroscopic properties of granular materials against lightning-like current and voltage impulses were used to develop an economic surge protection device based on sand. The transformers with the highest failure ratio were selected to install this new type of surge protection device. The design and implementation of the new device for the distribution transformer low-voltage side is described in this paper. (author)

  2. Location Privacy Protection Based on Improved K-Value Method in Augmented Reality on Mobile Devices

    Directory of Open Access Journals (Sweden)

    Chunyong Yin

    2017-01-01

    Full Text Available With the development of Augmented Reality technology, the application of location based service (LBS is more and more popular, which provides enormous convenience to people’s life. User location information could be obtained at anytime and anywhere. So user location privacy security suffers huge threats. Therefore, it is crucial to pay attention to location privacy protection in LBS. Based on the architecture of the trusted third party (TTP, we analyzed the advantages and shortages of existing location privacy protection methods in LBS on mobile terminal. Then we proposed the improved K-value location privacy protection method according to privacy level, which combines k-anonymity method with pseudonym method. Through the simulation experiment, the results show that this improved method can anonymize all service requests effectively. In addition to the experiment of execution time, it demonstrated that our proposed method can realize the location privacy protection more efficiently.

  3. The role of embolic protection devices during carotid stenting prior to cardiac surgery in asymptomatic patients: empty filters?

    Science.gov (United States)

    Van der Heyden, Jan; Wolters, Frank J; Garin, Nathalie; Blant, Snezana Andrejevic; Inglin, Marc; Bal, E T; Suttorp, Jan-Maarten

    2012-07-01

    The purpose of this study was to analyze the debris captured in the distal protection filters used during carotid artery stenting (CAS). CAS is an option available to high-risk patients requiring revascularization. Filters are suggested for optimal stroke prevention during CAS. From May 2005 to June 2007, filters from 59 asymptomatic patients who underwent CAS were collected and sent to a specialized laboratory for light-microscope and histological analysis. Peri- and postprocedural outcomes were assessed during 1-year follow-up. On the basis of biomedical imaging of the filter debris, the captured material could not be identified as embolized particles from the carotid plaque. On histological analysis the debris consisted mainly of red blood cell aggregates and/ or platelets, occasionally accompanied by granulocytes. We found no consistent histological evidence of embolized particles originating from atherosclerotic plaques. Post-procedure, three neurological events were reported: two (3.4%) transient ischemic attacks (TIA) and one (1.7%) ipsilateral minor stroke. The filters used during CAS in asymptomatic patients planned for cardiac surgery often remained empty. These findings may be explained by assuming that asymptomatic patients feature a different atherosclerotic plaque composition or stabilization through antiplatelet medication. Larger, randomized trials are clearly warranted, especially in the asymptomatic population. Copyright © 2011 Wiley Periodicals, Inc.

  4. Use of the event tree to assess the risk reduction obtained from rockfall protection devices

    Directory of Open Access Journals (Sweden)

    D. Peila

    2008-12-01

    Full Text Available The paper presents and discusses a procedure for the evaluation of the collective risk that can affect a road subjected to rockfalls, with and without protection measures, by means of the event tree analysis. This tool is useful to show designers whether the rockfall protection structures are located in the correct positions, whether they are the correct technological choice and what level of reduction of risk can be obtained. Different design options can therefore be compared on the same bases.

  5. Evaluation of personal protective devices used in diagnostic radiology; Avaliacao de dispositivos de protecao individual utilizados em radiologia diagnostica

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Fernanda Cristina Salvador

    2006-07-01

    In this work protective devices of five manufacturers were evaluated according to the NBR/IEC 61331-1 and NBR/IEC 61331-3 standards. Three different methodologies (linear interpolation, Archer model and sum of exponentials) were applied for the determination of the attenuation equivalent, since the standard does not indicate how it must be determined. Moreover, the uncertainties associated to each method, and the influence of the number of measurements in the combined uncertainty were estimated. The evaluated manufacture characteristics were: accompanying document, design, materials, dimensions and label marking. For this evaluation a check list about the requirements of the NBR/IEC 61331-3 standard was elaborated. The results showed a great difference between nominal and measured attenuation equivalent values. The comparison of the results using the three methodologies showed small variations among the obtained values and among the associated uncertainties in the different methodologies. It was possible to observe that the number of measurements does not contribute significantly for the increase of the uncertainty in all three methodologies. The best methodology for the laboratory routine is the linear interpolation methodology, with five measurements for each air kerma rate value. The discrepancy between the results obtained in this work and the requirements of the applied standards show the need to adopt a compulsory certification process for protective devices, thus contributing for the increase of the radiation protection of the users. (author)

  6. Distal finger replantation.

    Science.gov (United States)

    Scheker, Luis R; Becker, Giles W

    2011-03-01

    Reconstruction of the fingertip distal to the flexor tendon insertion by replantation remains controversial and technically challenging, but the anatomy of the fingertip has been well described and provides help in surgical planning. The open-book surgical technique is described with potential complications and is illustrated with clinical cases. Copyright © 2011 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.

  7. Distal biceps tendon rupture.

    Science.gov (United States)

    Savvidou, Olga D; Papagelopoulos, Panayiotis J; Mavrogenis, Andreas F; Partsinevelos, Antonios A; Karadimas, Evangelos J; Korres, Demetrios S

    2004-09-01

    The authors report a rupture of the distal tendon of biceps brachii in a 42-year-old athlete. Magnetic resonance imaging confirmed the injury. Early surgical repair was performed by reinsertion of the tendon on the radial tuberosity according to modified Boyd-Anderson technique. Indomethacin was administered prophylactically. No complications were noted. At the latest follow-up, the patient had full elbow range of motion and participated successfully in athletic activities and job.

  8. Multiobjective optimal placement of switches and protective devices in electric power distribution systems using ant colony optimization

    Energy Technology Data Exchange (ETDEWEB)

    Tippachon, Wiwat; Rerkpreedapong, Dulpichet [Department of Electrical Engineering, Kasetsart University, 50 Phaholyothin Rd., Ladyao, Jatujak, Bangkok 10900 (Thailand)

    2009-07-15

    This paper presents a multiobjective optimization methodology to optimally place switches and protective devices in electric power distribution networks. Identifying the type and location of them is a combinatorial optimization problem described by a nonlinear and nondifferential function. The multiobjective ant colony optimization (MACO) has been applied to this problem to minimize the total cost while simultaneously minimize two distribution network reliability indices including system average interruption frequency index (SAIFI) and system interruption duration index (SAIDI). Actual distribution feeders are used in the tests, and test results have shown that the algorithm can determine the set of optimal nondominated solutions. It allows the utility to obtain the optimal type and location of devices to achieve the best system reliability with the lowest cost. (author)

  9. Overcurrent protection co-ordination: A modern approach for modern devices

    Energy Technology Data Exchange (ETDEWEB)

    Hindle, P.J.

    1995-12-31

    The increasing densities and reduced geographical spans of urban and industrial power systems call for the coordination of more stages of overcurrent protection up to increasingly high fault levels. Applying existing rules of relay coordination, especially for industrial power systems, may make achieving satisfactory coordination difficult. This paper proposes a modern approach to coordination which is able to take advantage of the improved performance of modern protective relays and circuit breakers. The proposed method can handle a mix of new and old equipment and is made most useful when implemented with commonly available spreadsheet software. The suggested approach justifies reduced time margins for relay coordination in many difficult applications. Example calculations are included to illustrate typical considerations for coordinating two digital protection relays where a vacuum circuit breaker is used to clear a downstream fault.

  10. Definition and production of calibration standard neutron sources for radiation protection device calibration

    International Nuclear Information System (INIS)

    De Matos, E.

    1987-01-01

    To improve the characterization of radioprotection devices performances, it would be advisable to calibrate these devices in neutron spectra which are nearly like those met in practice (nuclear reactors, plutonium technology laboratories...). The purpose of this work is, in a first time, to choose the nature and the dimensions of the different shields used to achieve broad typical neutron spectra extending to lower energies from a 14.8 MeV neutron beam. The second step is the evaluation of spectral distribution and calculation of associated dosimetric quantities. For that, several spectrometric techniques are employed: on one hand, activation detectors and Bonner spheres method named rough spectrometry; on the other hand, an accurate spectrometry which uses recoil proton counters. The dosimetric quantities, especially the value of kerma deduced from these spectra must be in good agreement with those measured with a tissue equivalent ionization chamber [fr

  11. AntibIoTic: Protecting IoT Devices Against DDoS Attacks

    DEFF Research Database (Denmark)

    De Donno, Michele; Dragoni, Nicola; Giaretta, Alberto

    2018-01-01

    The 2016 is remembered as the year that showed to the world how dangerous Distributed Denial of Service attacks can be. Gauge of the disruptiveness of DDoS attacks is the number of bots involved: the bigger the botnet, the more powerful the attack. This character, along with the increasing availa...... availability of connected and insecure IoT devices, makes DDoS and IoT the perfect pair for the malware industry. In this paper we present the main idea behind AntibIoTic, a palliative solution to prevent DDoS attacks perpetrated through IoT devices.......The 2016 is remembered as the year that showed to the world how dangerous Distributed Denial of Service attacks can be. Gauge of the disruptiveness of DDoS attacks is the number of bots involved: the bigger the botnet, the more powerful the attack. This character, along with the increasing...

  12. Perspective pulse devices and automatic systems fire explosive protection of the radioactive infected objects

    International Nuclear Information System (INIS)

    Zakhmatov, V.D.; Kozhemyakin, A.S.; Pyatova, A.V.

    1999-01-01

    The suppression of fires in Chernobyl zone has shown complete unprofitable of traditional fire engineering to work on is radioactive of the infected district. In this connection as effective ways extinguishive in object 'Shelter' alongside with known traditional means and the systems offer to apply more perspective pulse systems, based on use energy small practically safe charges of gunpowder or explosive substances, in particular. Pulse explosive cone extinguishive of the device various sizes

  13. Efficient Protection of Android Applications through User Authentication Using Peripheral Devices

    Directory of Open Access Journals (Sweden)

    Jinseong Kim

    2018-04-01

    Full Text Available Android applications store large amounts of sensitive information that may be exposed and exploited. To prevent this security risk, some applications such as Syrup and KakaoTalk use physical device values to authenticate or encrypt application data. However, by manipulating these physical device values, an attacker can circumvent the authentication by executing a Same Identifier Attack and obtain the same application privileges as the user. In our work, WhatsApp, KakaoTalk, Facebook, Amazon, and Syrup were subjected to the Same Identifier Attack, and it was found that an attacker could gain the same privileges as the user, in all five applications. To solve such a problem, we propose a technical scheme—User Authentication using Peripheral Devices. We applied the proposed scheme to a Nexus 5X smartphone running Android version 7.1 and confirmed that the average execution time was 0.005 s, which does not affect the other applications’ execution significantly. We also describe the security aspects of the proposed scheme and its compatibility with the Android platform and other applications. The proposed scheme is practical and efficient in terms of resource usage; therefore, it will be useful for Android users to improve Android application security.

  14. Balancing protection of public health and safety with the free movement of goods in the EU medical device sector : The case of ‘borderline products’ classification

    NARCIS (Netherlands)

    Tseliou, Tasoula

    2015-01-01

    In 2013, the CJEU ruled on the ‘Lyocentre’ case touching upon an important and contemporary issue in the EU Medical Device regime – the classification issue between medical devices and medicinal products. This problem is connected with the internal market v. protection of health dilemma as well as

  15. MITHYS: Mind The Hand You Shake - Protecting Mobile Devices from SSL Usage Vulnerabilities

    DEFF Research Database (Denmark)

    Conti, M.; Dragoni, Nicola; Gottardo, S.

    2013-01-01

    of a prototype implementation in Android, named MITHYSApp. A thorough set of experiments assesses the validity of our solution in detecting and protecting mobile applications from man-in-the-middle attacks, without introducing significant overheads. Finally, MITHYSApp does not require any special permissions nor...

  16. Reference neutron radiations. Part 2: Calibration fundamentals of radiation protection devices related to the basic quantities characterizing the radiation field

    International Nuclear Information System (INIS)

    2000-01-01

    ISO 8529 consists of the following parts, under the general title Reference neutron radiations: Part 1: Characteristics and methods of production; Part 2: Calibration fundamentals of radiation protection devices related to the basic quantities characterizing the radiation field; Part 3: Calibration of area and personal dosimeters and determination of response as a function of energy and angle of incidence. This Part 2. of ISO 8529 takes as its starting point the neutron sources described in ISO 8529-1. It specifies the procedures to be used for realizing the calibration conditions of radiation protection devices in neutron fields produced by these calibration sources, with particular emphasis on the corrections for extraneous effects (e.g., the neutrons scattered from the walls of the calibration room). In this part of ISO 8529, particular emphasis is placed on calibrations using radionuclide sources (clauses 4 to 6) due to their widespread application, with less details given on the use of accelerator and reactor sources (8.2 and 8.3). This part of ISO 8529 then leads to ISO 8529-3 which gives conversion coefficients and the general rules and procedures for calibration

  17. Improvement of the internal light environment on the objects of transport infrastructure with aid of sun-protective devices

    Science.gov (United States)

    Stetsky, Sergey

    2017-10-01

    The article analyzes the problems of outdoor stationary sun-protective devices (S.P.D.) and their influence on the natural daylighting levels in the premises of civil objects of transport infrastructure under the hot and sunny climatic conditions of the environment. It is noted, that with clear sky, typical for the said climate, non-uniform luminance of the sky differs seriously from the luminance of standard overcast sky with diffused light, recommended by C.I.E. (Commission International D’Eclairage).A conclusion is made, that with clear sky conditions, a sun-protective devices in the form of stationary canopies (awninas) help to improve the lighting environment in the premises considered. This becomes possible due to reflected sun flow from the surfaces of SPD employed, as well as due to rise of a daylight factor values in farmost from windows zones of interiors, because of the increase of luminance factor values of the sky areas, observed from these zones. Thus, the SPD considered, in the hot and sunny climatic conditions are able not only to carry out their main function of passive method of solar radiation and thermal control in the interiors, but also to act as an efficient measure to improve lightning environment of the premises in question.

  18. Distal Radius Hemiarthroplasty.

    Science.gov (United States)

    Adams, Brian D; Lawler, Ericka A; Kuhl, Taften L

    2016-08-01

    Due to a higher risk for implant loosening, particularly of the distal component, patients with physically demanding lifestyles are infrequently considered for total wrist arthroplasty (TWA). A distal radius hemiarthroplasty may obviate the need for the strict restrictions recommended for patients treated by TWA, thus providing another surgical option for active patients with severe wrist arthritis, especially those with articular degeneration of the lunate facet of the radius, capitate head, or combination of both, who are not typically candidates for traditional motion-preserving procedures. Eight fresh-frozen cadaver limbs (age range, 43-82 years) with no history of rheumatoid arthritis or upper extremity trauma were used. Radiodense markers were inserted in the radius and hand. Posteroanterior (PA) fluoroscopic images with the wrist in neutral, radial deviation, and ulnar deviation, and lateral images with the wrist in neutral, flexion, and extension were obtained for each specimen before implantation, after distal radius hemiarthroplasty, and after combined hemiarthroplasty and PRC. On the PA images, the capitate remained within 1.42 and 2.21 mm of its native radial-ulnar position following hemiarthroplasty and hemiarthroplasty with PRC, respectively. Lateral images showed the capitate remained within 1.06 mm of its native dorsal-volar position following hemiarthroplasty and within 4.69 mm following hemiarthroplasty with PRC. Following hemiarthroplasty, capitate alignment changed 2.33 and 2.59 mm compared with its native longitudinal alignment on PA and lateral films, respectively. These changes did not reach statistical significance. As expected, significant shortening in longitudinal alignment was seen on both PA and lateral films for hemiarthroplasty with PRC. A distal radius implant hemiarthroplasty with or without a PRC provides good static alignment of the wrist in a cadaver model and thus supports the concept as potential treatment alternatives

  19. Operating devices for radiation protection: acceptable deviations from legal metrology point of view

    International Nuclear Information System (INIS)

    Soukup, T.

    2008-01-01

    The objective of this paper is to draw attention to possible discrepancies in the measuring the quantities of ionizing radiation mainly in natural environment, that cannot be explained by faulty gauges. In addition I would like to draw the attention to these issue radiation protection researchers, document that uncertainties in estimating the impact of exposure and transfer them into the language of used meters tolerances. (authors)

  20. Operating devices for radiation protection: acceptable deviations from legal metrology point of view

    International Nuclear Information System (INIS)

    Soukup, T.

    2009-01-01

    The objective of this paper is to draw attention to possible discrepancies in the measuring the quantities of ionizing radiation mainly in natural environment, that cannot be explained by faulty gauges. In addition I would like to draw the attention to these issue radiation protection researchers, document that uncertainties in estimating the impact of exposure and transfer them into the language of used meters tolerances. (authors)

  1. Design of Protection Coordination for Overcurrent on Electrical System in Tanker Ship Plan Using Electro Mechanical Trip Device

    Directory of Open Access Journals (Sweden)

    Indra Ranu Kusuma

    2017-09-01

    Full Text Available Disturbance of power system in ship is unavoidable case that required a function from safety system to separate the affected parts of system. The disturbance in electrical system generally is a short-circuit current. It is affected when there are two conductors having lowest impedance in normal condition that have two different voltages thus causing an overcurrent. There is one of the device protection to prevent a disturbance like short circuit current, is circuit breaker. It opens the contact with component or system that disturbance using electromechanical trip device. The principal operating of trip device is using electric current flow in the circuit breaker and the magnet induces the tripping part to moving the contact from closed position to the opened position. The main discussion is to coordinate circuit breakers in four operating conditions of the ship's generator using software ETAP. The simulation of the result obtained value of short circuit in main bus one at sailing condition is 8.2 kA. Tripping time for the circuit breakers in sailing condition at one typical disturbance are 0.75 seconds for circuit breaker number 29; 0.83 seconds for circuit breaker number 37 and 1 second for circuit breaker number 28.

  2. Frequent Embolization in Peripheral Angioplasty: Detection with an Embolism Protection Device (Angio Guard) and Electron Microscopy

    International Nuclear Information System (INIS)

    Koenig, Claudius W.; Pusich, Benjamin; Tepe, Gunnar; Wendel, Hans-Peter; Hahn, Ulrich; Schneider, Wilke; Claussen, Claus D.; Duda, Stephan H.

    2003-01-01

    Purpose: To evaluate the deliverability and protection capabilities of an embolism protection filter in angioplasty of peripheral arteries. Methods: The Angioguard emboli capture guidewire system was applied in 11 patients with femoropopliteal lesions (6 stenoses, 3 occlusions, 2 controls).Data on lesion crossing, flow deceleration and macroembolization were recorded. Filter membranes were evaluated with scanning electron microscopy (SEM). Results: System delivery was successful in all patients. Primary lesion crossing was feasible in four of six stenoses; predilatation was required in two of six. Marked flow deceleration was recorded in six patients. Emboli next to the filter were detected in each patient with concentric plaques, but could not reliably be removed with the filter. Downstream macroembolization was also present in all patients with concentric stenoses, but in none with chronic occlusion. None of the patients had clinical signs of ischemia. SEM analysis demonstrated only small particles on control group filters and non-obliterating fibrinous conglomerates on filters used in chronic occlusion. Substantial obliteration was seen on several filters used in stenotic lesions. Conclusion:Microembolization of fibrin aggregates is a common incident in balloon angioplasty of femoropopliteal stenoses. Macroembolization occurred more frequently than previously reported. The use of embolism protection filters aided in the detection but not in the removal of larger emboli

  3. Electromagnetic pulse/transient threat testing of protection devices for amateur/military affiliate radio system equipment. Volume 3. Test data, electromagnetic pulse testing of protection devices. Section 6. Equipment and devices bench check measurement

    Science.gov (United States)

    Bodson, D.; Frizzell, J.; Higdon, T.; Rabke, W.

    1985-10-01

    The results of two test programs are presented: one to evaluate existing transient suppression devices and components, and one to evaluate the response of amateur radio equipment to an EMP transient environment. Oscilloscope photographs of the following transmitters/receivers are included: YAESU FT 726R, YAESU F7 757GX, ICOM IC-745, ICOM IC-27A, ICOM IC-02AT, ICOM IC-271A, ICOM IC-471A, Kenwood TS-4305, Kenwood TR-2600, Kenwood 7930, and Swan 250.

  4. Exploiting heat treatment effects on SMAs macro and microscopic properties in developing fire protection devices

    Science.gov (United States)

    Burlacu, L.; Cimpoeşu, N.; Bujoreanu, L. G.; Lohan, N. M.

    2017-08-01

    Ni-Ti shape memory alloys (SMAs) are intelligent alloys which demonstrate unique properties, such as shape memory effect, two-way shape memory effect, super-elasticity and vibration damping which, accompanied by good processability, excellent corrosion resistance and biocompatibility as well as fair wear resistance and cyclic stability, enabled the development of important industrial applications (such as sensors, actuators, fasteners, couplings and valves), medical applications (such as stents, bone implants, orthodontic archwires, minimal invasive surgical equipment) as well as environmental health and safety devices (anti-seismic dampers, fire safety devices). The phase transitions in Ni-Ti SMAs are strongly influenced by processing methods, chemical compositions and thermomechanical history. This paper presents a study of the effects of heat treatment on the mechanical and thermal properties of commercial Ni-Ti shape memory alloy (SMA). The experimental work involved subjecting a SMA rod to heat-treatment consisting in heating up to 500°C, 10 minutes-maintaining and water quenching. Mechanical properties were highlighted by microhardness tests while thermal characteristics were emphasized by differential scanning calorimetry (DSC). The presence of chemical composition fluctuations was checked by X-ray energy dispersive spectroscopy performed with an EDAX Bruker analyzer.

  5. Preparation and thermal performance of paraffin/Nano-SiO2 nanocomposite for passive thermal protection of electronic devices

    International Nuclear Information System (INIS)

    Wang, Yaqin; Gao, Xuenong; Chen, Peng; Huang, Zhaowen; Xu, Tao; Fang, Yutang; Zhang, Zhengguo

    2016-01-01

    Highlights: • Three types of paraffin/nano-SiO 2 nanocomposites were prepared and characterized. • Thermo-physical properties of these composites were determined and compared. • One composite with lower thermal conductivity showed better thermal insulation properties. • This composite was identified as thermal insulation material for electronic components. - Abstract: In this paper, three grades of nano silicon dioxide (nano-SiO 2 ), NS1, NS2 and NS3, were mixed into paraffin to prepare nanocomposites as novel insulation materials for electronic passive thermal protection applications. The optimal mass percentages of paraffin for the three composites, NS1P, NS2P and NS3P, were determined to be 75%, 70% and 65%, respectively. Investigations by means of scanning electron micrographs (SEM), differential scanning calorimeter (DSC), thermogravimetric analysis (TG), hot disk analyzer and thermal protection performance tests were devoted to the morphology, thermal properties and thermal protection performance analysis of composites. Experimental results showed that paraffin uniformly distributed into the pores and on the surface of nano-SiO 2 . Melting points of composites declined and experimental latent heat became lower than the calculated values with the decrease of nano-SiO 2 pore size. The NS1P composite had larger thermal storage capacity, better reliability and stability compared with NS2P and NS3P. In addition, compared with 90% wt.% paraffin/EG composite, the incorporation of NS1 (25 wt.%) into paraffin caused not only 63.2% reduction in thermal conductivity, but also 21.8% increase in thermal protection time affected by the ambient temperature. Thus those good properties confirmed that NS1P (75 wt.%) composite was a viable candidate for protecting electronic devices under high temperature environment.

  6. Overcurrent protection co-ordination. A modern approach for modern devices

    Energy Technology Data Exchange (ETDEWEB)

    Hindle, P. [GEC Alsthom Engineering Systems Ltd., Whetstone (United Kingdom); Sanderson, J.V.H. [Power Engineering Consultants Ltd., Cheshire (United Kingdom)

    1995-12-31

    A modern approach to relay co-ordination that takes advantage of the improved performance of modern protective relays and circuits was proposed. The proposed method dealt with a mixture of new and old equipment and was most useful when implemented using common spreadsheet software. The suggested approach justified reduced time margins for relay co-ordination in many difficult applications. Other established approaches were reviewed. A discussion of fixed and variable time margin allowances was presented. The formulation of an equation to determine the required upstream relay operating time was explained, with sample calculations. Relay performance standards and modern protective equipment were discussed. It was concluded that modern relays and circuit breakers are much more advanced than designs of the recent past. The method described allowed significant reductions in margins which enabled modern relays to operate faster. While calculations for the procedures were said to be tedious to perform by hand, they can be easily done with spreadsheet software. 10 refs., 4 figs.

  7. Radiation protection for an intra-operative X-ray device.

    Science.gov (United States)

    Eaton, D J; Gonzalez, R; Duck, S; Keshtgar, M

    2011-11-01

    Therapeutic partial breast irradiation can be delivered intra-operatively using the Intrabeam 50 kVp compact X-ray device. Spherical applicators are added to the source to give an isotropic radiation dose. The low energy of this unit leads to rapid attenuation with distance, but dose rates are much greater than for diagnostic procedures. To investigate the shielding requirements for this unit, attenuation measurements were carried out with manufacturer-provided tungsten-rubber sheets, lead, plasterboard and bricks. A prospective environmental dose rate survey was also conducted in the designated theatre. As a result of isotropic geometry, the scattered dose around shielding can be 1% of primary and thus often dominates measured dose rates compared with transmission. The absorbed dose rate of the unshielded source at 1 m was 11.6 mGy h(-1) but this was reduced by 95% with the shielding sheets. Measured values for the common shielding materials were similar to reference data for the attenuation of a 50 kVp diagnostic X-ray beam. Two lead screens were constructed to shield operators remaining in the theatre and an air vent into a service corridor. A lead apron would also provide suitable attenuation, although a screen allows greater flexibility for treatment operators. With these measures, staff doses were reduced to negligible quantities. Survey measurements taken during patient treatments confirmed no additional measures were required, but the theatre should be a controlled area and access restricted. Results from this study and reference data can be used for planning other facilities.

  8. Evaluation of the Survivability of Microorganisms Deposited on Filtering Respiratory Protective Devices under Varying Conditions of Humidity

    Directory of Open Access Journals (Sweden)

    Katarzyna Majchrzycka

    2016-01-01

    Full Text Available Bioaerosols are common biological factors in work environments, which require routine use of filtering respiratory protective devices (FRPDs. Currently, no studies link humidity changes in the filter materials of such devices, during use, with microorganism survivability. Our aim was to determine the microclimate inside FRPDs, by simulating breathing, and to evaluate microorganism survivability under varying humidity conditions. Breathing was simulated using commercial filtering facepiece respirators in a model system. Polypropylene melt-blown nonwoven fabrics with moisture contents of 40%, 80%, and 200%, were used for assessment of microorganisms survivability. A modified AATCC 100-2004 method was used to measure the survivability of ATCC and NCAIM microorganisms: Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Candida albicans and Aspergillus niger. During simulation relative humidity under the facepiece increased after 7 min of usage to 84%–92% and temperature increased to 29–30 °C. S. aureus survived the best on filter materials with 40%–200% moisture content. A decrease in survivability was observed for E. coli and C. albicans when mass humidity decreased. We found that B. subtilis and A. niger proliferated for 48–72 h of incubation and then died regardless of the moisture content. In conclusion, our tests showed that the survivability of microorganisms on filter materials depends on the amount of accumulated moisture and microorganism type.

  9. Evaluation of the Survivability of Microorganisms Deposited on Filtering Respiratory Protective Devices under Varying Conditions of Humidity.

    Science.gov (United States)

    Majchrzycka, Katarzyna; Okrasa, Małgorzata; Skóra, Justyna; Gutarowska, Beata

    2016-01-04

    Bioaerosols are common biological factors in work environments, which require routine use of filtering respiratory protective devices (FRPDs). Currently, no studies link humidity changes in the filter materials of such devices, during use, with microorganism survivability. Our aim was to determine the microclimate inside FRPDs, by simulating breathing, and to evaluate microorganism survivability under varying humidity conditions. Breathing was simulated using commercial filtering facepiece respirators in a model system. Polypropylene melt-blown nonwoven fabrics with moisture contents of 40%, 80%, and 200%, were used for assessment of microorganisms survivability. A modified AATCC 100-2004 method was used to measure the survivability of ATCC and NCAIM microorganisms: Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Candida albicans and Aspergillus niger. During simulation relative humidity under the facepiece increased after 7 min of usage to 84%-92% and temperature increased to 29-30 °C. S. aureus survived the best on filter materials with 40%-200% moisture content. A decrease in survivability was observed for E. coli and C. albicans when mass humidity decreased. We found that B. subtilis and A. niger proliferated for 48-72 h of incubation and then died regardless of the moisture content. In conclusion, our tests showed that the survivability of microorganisms on filter materials depends on the amount of accumulated moisture and microorganism type.

  10. Evaluation of the Survivability of Microorganisms Deposited on Filtering Respiratory Protective Devices under Varying Conditions of Humidity

    Science.gov (United States)

    Majchrzycka, Katarzyna; Okrasa, Małgorzata; Skóra, Justyna; Gutarowska, Beata

    2016-01-01

    Bioaerosols are common biological factors in work environments, which require routine use of filtering respiratory protective devices (FRPDs). Currently, no studies link humidity changes in the filter materials of such devices, during use, with microorganism survivability. Our aim was to determine the microclimate inside FRPDs, by simulating breathing, and to evaluate microorganism survivability under varying humidity conditions. Breathing was simulated using commercial filtering facepiece respirators in a model system. Polypropylene melt-blown nonwoven fabrics with moisture contents of 40%, 80%, and 200%, were used for assessment of microorganisms survivability. A modified AATCC 100-2004 method was used to measure the survivability of ATCC and NCAIM microorganisms: Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Candida albicans and Aspergillus niger. During simulation relative humidity under the facepiece increased after 7 min of usage to 84%–92% and temperature increased to 29–30 °C. S. aureus survived the best on filter materials with 40%–200% moisture content. A decrease in survivability was observed for E. coli and C. albicans when mass humidity decreased. We found that B. subtilis and A. niger proliferated for 48–72 h of incubation and then died regardless of the moisture content. In conclusion, our tests showed that the survivability of microorganisms on filter materials depends on the amount of accumulated moisture and microorganism type. PMID:26742049

  11. Radiation beans characterization and implantation for study of lead equivalent individual protection device used in radiodiagnostic practices

    International Nuclear Information System (INIS)

    Pereira, Leslie Silva

    2004-01-01

    The protective shielding (IPC) must be used by occupationally exposed professionals, patients and volunteers, in order to optimize the doses who receive due to radiological practices. International and national norms establish the methodology to be adopted for determination of the IPC attenuation. In this work, the IPC had been submitted to X-rays beams with known characteristics, standardized for determination of their attenuation equivalent thickness by comparison to an experimental lead attenuation slope. This comparison technique allowed insurance estimative of the IPC attenuation equivalent thickness in mm of lead. Thus, it was possible to verify the conformity of the attenuation equivalent thickness determined experimentally and the value of the thickness indicated by the manufacturer. To carry out this work, it was necessary the implementation of experimental setups stated in the specifics norms, the study of the X-rays beams original features and the determination of combined additional filters, in order to allow the X-ray equipment used operates in compliance with Norm IEC 61331-1 IEC. The radiation quality selected is characterized by a 100 kV voltage and a 0.25 mm of copper overall filtration. The implementation of this radiation quality it was carried through of its first and second HVL (Half Value Layer). Thus, a methodology according to the international Norms has been implemented in the laboratory. The results of the present work provide suitable and useful information about radiation beams features related to the determination techniques of the attenuation properties. Once implemented the procedures for conformity evaluation of the protection devices, it will be possible to carry out specific quality control tests, which will be helpful to manufacturers, customers, as well as authorities in the radiological protection and health areas. (author)

  12. Mini-implant-supported Molar Distalization

    Directory of Open Access Journals (Sweden)

    Amit Goyal

    2012-01-01

    Full Text Available Temporary anchorage devices popularly called mini-implants or miniscrews are the latest addition to an orthodontist′s armamentarium. The following case report describes the treatment of a 16-year-old girl with a pleasant profile, moderate crowding and Angle′s Class II molar relationship. Maxillary molar distalization was planned and mini-implants were used to preserve the anterior anchorage. After 13 months of treatment, Class I molar and canine relation was achieved bilaterally and there was no anterior proclination. Thus, mini-implants provide a viable option to the clinician to carry out difficult tooth movements without any side effects.

  13. Distal corporoplasty for distal cylinders extrusion after penile prosthesis implantation.

    Science.gov (United States)

    Carrino, Maurizio; Chiancone, Francesco; Battaglia, Gaetano; Pucci, Luigi; Fedelini, Paolo

    2017-02-03

    Distal extrusion of cylinders is a potential complication of the penile prosthesis implantation. Several methods have been proposed for repairing a distal penile erosion. We present our preliminary experience in "Distal corporoplasty" technique. We enrolled 18 consecutive patients whose underwent a distal corporoplasty with simultaneous reimplantation of an "AMS 700 inflatable penile prosthesis (LGX)" from January 2013 to November 2015 at our hospital. All procedures were performed by a single surgical team. Intraoperative and postoperative complications have been classified and reported according to Satava6 and Clavien-Dindo (CD) system.7 Mean values with standard deviations (±SD) were computed and reported for all items. Mean age of the patients was 53.61 (±11.90) years. Mean body max index (BMI) was 24.22 (±2.51). Mean operative time was 85.2 (±13.1) minutes. Blood losses were minimal. No intraoperative complications are reported according to Satava classification. Four out of 18 patients (22.22%) experienced postoperative complications according to CD system. All patients had sexual intercourse for the first time postsurgery after a mean of 59.11 ± 2.08 days. Mean follow-up was 22.11 (±9.95). Distal extrusion of cylinders is a potential complication of the penile prosthesis implantation. Distal corporoplasty was first described by Mulcahy. He reported a series of 14 patients with a follow-up of about 2 years with optimal functional outcomes. Moreover, distal corporoplasty resulted in shorter operative time, better function, less pain, and fewer recurrences than Gortex windsock repair.10 In our experience, distal corporoplasty is a simple and safe procedure in the treatment of distal cylinders extrusion when the prosthetic material is not exposed to the exterior.

  14. Distal esophageal spasm.

    Science.gov (United States)

    Roman, Sabine; Kahrilas, Peter J

    2015-07-01

    Distal esophageal spasm (DES) is a rare esophageal motility disorder associated with dysphagia and chest pain. In 2011, the diagnosis of DES was refined based on the occurrence of premature (rather than rapid) contractions by high-resolution manometry. New therapeutic options have also been recently proposed. Thus, a review on DES incorporating publications since 2012 is timely because of these revisions in definition and management. DES remains a heterogeneous clinical disorder. Its pathophysiology is still debated and DES might be related to achalasia. Alternatively, it might be secondary to medications, especially opiates. Endoscopic ultrasound might be informative diagnostically by demonstrating muscularis propria hypertrophy and thickening. Botulinum toxin injection in the esophageal body has been shown superior to placebo to relieve symptoms associated with DES. Finally, per oral endoscopic myotomy is a promising therapeutic approach, but may be less effective in DES than in achalasia. The diagnosis of DES should lead to a systematic search for medication that might promote the occurrence of esophageal dysmotility. Endoscopic treatment of DES (botulinum toxin injection or per oral endoscopic myotomy) should be further evaluated in controlled studies using current diagnostic criteria by high-resolution manometry.

  15. Proposal for the award of a blanket order contract for the supply of microprocessor-based protection and control devices for the CERN HV distribution network

    CERN Document Server

    2004-01-01

    This document concerns the award of a blanket contract for the supply of microprocessor-based protection and control devices for the CERN HV distribution network. The Finance Committee is invited to agree to the negotiation of a blanket order contract with SCHNEIDER ELECTRIC (PT), the lowest technically acceptable bidder after realignment, for the supply of microprocessor-based protection and control devices for the CERN HV distribution network for a total amount of 1 900 000 euros (2 924 128 Swiss francs), subject to revision for inflation after 1 January 2007. The rate of exchange used is that stipulated in the tender

  16. Class II correction prior to orthodontics with the carriere distalizer.

    Science.gov (United States)

    McFarlane, Bruce

    2013-01-01

    Class II correction is a challenge in orthodontics with many existing devices being complex, too compliance-driven, or too prone to breakage. The Carriere Distalizer allows for straightforward Class II correction prior to orthodontics (fixed or clear aligners) at a time when no other mechanics interfere, and compliance is at its best.

  17. Study of performance of acoustic fixture for using in noise reduction rate tests of hearing protection devices

    Directory of Open Access Journals (Sweden)

    zam Biabani

    2016-06-01

    Full Text Available Introduction:One of the recommended methods for evaluation effectiveness of hearing protection is use the acoustic fixture accordance with standard ISO 4869-3. The aim of this study was evaluate the acoustic performance of fixture for using in noise reduction rate tests of hearing protection devices in the laboratory. Methods: In this cross-sectional study , noise reduction rates of five common ear muffs used in the Iran industries were investigated based on the ISO 11904 standard, microphone in real ear method, using noise dosimeter (SVANTEK , Model SV102 equipped with microphone SV25 model which can install inside the ear on 30 subjects under laboratory conditions. Also, noise reduction rate of earmuffs was determined using the fixture model AVASINA9402 accordance with standard procedures. Data were analyzed using the software SPSS21. Results: The results showed the real noise reduction rates of the earmuffs on the studied subjects are from 59% to 94% nominal reduction rates. That rates for the ear muffs on the studied fixture are from 64% to 92.The results showed that the noise reduction rates of the ear muffs on subjects compared with and noise reduction rates of the ear muffs on fixture were not statistically significant (p> 0.05. Conclusion: The results showed the accuracy of noise reduction rate of earmuffs using the fixture compared with real subjects is acceptable. Hence, the fixture is good choice for environments where there’s no possibility of acoustic evaluation on real subjects, also for quality control of productions in the earmuff manufacturers.

  18. Modeling Speech Level as a Function of Background Noise Level and Talker-to-Listener Distance for Talkers Wearing Hearing Protection Devices

    Science.gov (United States)

    Bouserhal, Rachel E.; Bockstael, Annelies; MacDonald, Ewen; Falk, Tiago H.; Voix, Jérémie

    2017-01-01

    Purpose: Studying the variations in speech levels with changing background noise level and talker-to-listener distance for talkers wearing hearing protection devices (HPDs) can aid in understanding communication in background noise. Method: Speech was recorded using an intra-aural HPD from 12 different talkers at 5 different distances in 3…

  19. Effects of low speed wind on the recognition/identification and pass-through communication tasks of auditory situation awareness afforded by military hearing protection/enhancement devices and tactical communication and protective systems.

    Science.gov (United States)

    Lee, Kichol; Casali, John G

    2016-01-01

    To investigate the effect of controlled low-speed wind-noise on the auditory situation awareness performance afforded by military hearing protection/enhancement devices (HPED) and tactical communication and protective systems (TCAPS). Recognition/identification and pass-through communications tasks were separately conducted under three wind conditions (0, 5, and 10 mph). Subjects wore two in-ear-type TCAPS, one earmuff-type TCAPS, a Combat Arms Earplug in its 'open' or pass-through setting, and an EB-15LE electronic earplug. Devices with electronic gain systems were tested under two gain settings: 'unity' and 'max'. Testing without any device (open ear) was conducted as a control. Ten subjects were recruited from the student population at Virginia Tech. Audiometric requirements were 25 dBHL or better at 500, 1000, 2000, 4000, and 8000 Hz in both ears. Performance on the interaction of communication task-by-device was significantly different only in 0 mph wind speed. The between-device performance differences varied with azimuthal speaker locations. It is evident from this study that stable (non-gusting) wind speeds up to 10 mph did not significantly degrade recognition/identification task performance and pass-through communication performance of the group of HPEDs and TCAPS tested. However, the various devices performed differently as the test sound signal speaker location was varied and it appears that physical as well as electronic features may have contributed to this directional result.

  20. Cerebral ischemia after filter-protected carotid artery stenting is common and cannot be predicted by the presence of substantial amount of debris captured by the filter device.

    Science.gov (United States)

    Maleux, G; Demaerel, P; Verbeken, E; Daenens, K; Heye, S; Van Sonhoven, F; Nevelsteen, A; Wilms, G

    2006-10-01

    Protected carotid artery stent placement is currently under clinical evaluation as a potential alternative to carotid endarterectomy. The current study was undertaken to determine the incidence of new ischemic lesions found on diffusion-weighted MR imaging (DWI) in nonselected patients after protected carotid artery stent placement using a filter device and to determine the potential relationship between these new ischemic lesions and the presence or absence of a clear amount of debris captured by the neuroprotection filter device. A nonrandomized cohort of 52 patients (40 men, 12 women) presenting with carotid occlusive disease underwent protected carotid artery stent placement using a filter device. DWI obtained 1 day before stent placement was compared with that obtained 1 day after stent placement. In addition, the macroscopic and microscopic analysis of debris captured by the filter device during the carotid stent placement procedure was assessed. Neuroprotected carotid stent placement was technically successful in all 53 procedures but was complicated by a transient ischemic attack in 3 patients (5.6%). In 22 patients (41.5%), new ischemic lesions were found on DWI, and in 21 filter devices (39.6%), a substantial amount of atheromatous plaque and/or fibrin was found. No clear relationship between the presence of debris captured by the filter device and new lesions detected by DWI was found (P = .087; odds ratio 3.067). Neuroprotected carotid artery stent placement will not avoid silent cerebral ischemia. Systematic microscopic analysis of debris captured by the filter device has no predictive value for potential cerebral ischemia after carotid artery stent placement.

  1. Exposure to hazardous workplace noise and use of hearing protection devices among US workers--NHANES, 1999-2004.

    Science.gov (United States)

    Tak, Sangwoo; Davis, Rickie R; Calvert, Geoffrey M

    2009-05-01

    To estimate the prevalence of workplace noise exposure and use of hearing protection devices (HPDs) at noisy work, NIOSH analyzed 1999-2004 data from the National Health and Nutrition Examination Survey (NHANES). A total of 9,275 currently employed workers aged > or =16 years were included in the weighted analysis. Hazardous workplace noise exposure was defined as self-reported exposure to noise at their current job that was so loud that the respondent had to speak in a raised voice to be heard. Industry and occupation were determined based on the respondent's current place and type of work. Twenty-two million US workers (17%) reported exposure to hazardous workplace noise. The weighted prevalence of workplace noise exposure was highest for mining (76%, SE = 7.0) followed by lumber/wood product manufacturing (55%, SE = 2.5). High-risk occupations included repair and maintenance, motor vehicle operators, and construction trades. Overall, 34% of the estimated 22 million US workers reporting hazardous workplace exposure reported non-use of HPDs. The proportion of noise-exposed workers who reported non-use of HPDs was highest for healthcare and social services (73.7%, SE = 8.1), followed by educational services (55.5%). Hearing loss prevention and intervention programs should be targeted at those industries and occupations identified to have a high prevalence of workplace noise exposure and those industries with the highest proportion of noise-exposed workers who reported non-use of HPDs. Published 2009 Wiley-Liss, Inc.

  2. Traumatic Distal Ulnar Artery Thrombosis

    Directory of Open Access Journals (Sweden)

    Ahmet A. Karaarslan

    2014-01-01

    Full Text Available This paper is about a posttraumatic distal ulnar artery thrombosis case that has occurred after a single blunt trauma. The ulnar artery thrombosis because of chronic trauma is a frequent condition (hypothenar hammer syndrome but an ulnar artery thrombosis because of a single direct blunt trauma is rare. Our patient who has been affected by a single blunt trauma to his hand and developed ulnar artery thrombosis has been treated by resection of the thrombosed ulnar artery segment. This report shows that a single blunt trauma can cause distal ulnar artery thrombosis in the hand and it can be treated merely by thrombosed segment resection in suitable cases.

  3. Development of the self-learning machine for creating models of microprocessor of single-phase earth fault protection devices in networks with isolated neutral voltage above 1000 V

    Science.gov (United States)

    Utegulov, B. B.; Utegulov, A. B.; Meiramova, S.

    2018-02-01

    The paper proposes the development of a self-learning machine for creating models of microprocessor-based single-phase ground fault protection devices in networks with an isolated neutral voltage higher than 1000 V. Development of a self-learning machine for creating models of microprocessor-based single-phase earth fault protection devices in networks with an isolated neutral voltage higher than 1000 V. allows to effectively implement mathematical models of automatic change of protection settings. Single-phase earth fault protection devices.

  4. Implementation of an enhanced safety-engineered sharp device oversight and bloodborne pathogen protection program at a large academic medical center.

    Science.gov (United States)

    Talbot, Thomas R; Wang, Deede; Swift, Melanie; St Jacques, Paul; Johnson, Susan; Brinsko, Vicki; Thayer, Valerie; Dail, Teresa; Feistritzer, Nancye; Polancich, Shea

    2014-11-01

    Exposure of healthcare personnel to bloodborne pathogens (BBPs) can be prevented in part by using safety-engineered sharp devices (SESDs) and other safe practices, such as double gloving. In some instances, however, safer devices and practices cannot be utilized because of procedural factors or the lack of a manufactured safety device for the specific clinical use. In these situations, a standardized system to examine requests for waiver from expected practices is necessary. Before-after program analysis. Large academic medical center. Vanderbilt University Medical Center developed a formalized system for an improved waiver process, including an online submission and tracking site, and standards surrounding implementation of core safe practices. The program's impact on sharp device injuries and utilization of double gloving and blunt sutures was examined. Following implementation of the enhanced program, there was an increase in the amount of undergloves and blunt sutures purchased for surgical procedures, suggesting larger utilization of these practices. The rate of sharp device injuries of all at-risk employees decreased from 2.32% to 2.12%, but this decline was not statistically significant (P = .14). The proportion of reported injuries that were deemed preventable significantly decreased from 72.7% (386/531) before implementation to 63.9% (334/523; P = .002) after implementation of the enhanced program. An enhanced BBP protection program was successful at providing guidance to increase safe practices and at improving the management of SESD waiver requests and was associated with a reduction in preventable sharp device injuries.

  5. Protective

    Directory of Open Access Journals (Sweden)

    Wessam M. Abdel-Wahab

    2013-10-01

    Full Text Available Many active ingredients extracted from herbal and medicinal plants are extensively studied for their beneficial effects. Antioxidant activity and free radical scavenging properties of thymoquinone (TQ have been reported. The present study evaluated the possible protective effects of TQ against the toxicity and oxidative stress of sodium fluoride (NaF in the liver of rats. Rats were divided into four groups, the first group served as the control group and was administered distilled water whereas the NaF group received NaF orally at a dose of 10 mg/kg for 4 weeks, TQ group was administered TQ orally at a dose of 10 mg/kg for 5 weeks, and the NaF-TQ group was first given TQ for 1 week and was secondly administered 10 mg/kg/day NaF in association with 10 mg/kg TQ for 4 weeks. Rats intoxicated with NaF showed a significant increase in lipid peroxidation whereas the level of reduced glutathione (GSH and the activity of superoxide dismutase (SOD, catalase (CAT, glutathione S-transferase (GST and glutathione peroxidase (GPx were reduced in hepatic tissues. The proper functioning of the liver was also disrupted as indicated by alterations in the measured liver function indices and biochemical parameters. TQ supplementation counteracted the NaF-induced hepatotoxicity probably due to its strong antioxidant activity. In conclusion, the results obtained clearly indicated the role of oxidative stress in the induction of NaF toxicity and suggested hepatoprotective effects of TQ against the toxicity of fluoride compounds.

  6. Dispositivo de proteção após reparação das rupturas do mecanismo extensor do joelho Protection device on the repair of ruptures of knee extensor mechanism

    Directory of Open Access Journals (Sweden)

    Carlos Francisco Arguello Frutos

    2009-02-01

    Full Text Available OBJETIVO: Avaliar os resultados obtidos com a realização da técnica de dispositivo de proteção nos pacientes submetidos à osteossíntese ou sutura de lesões do mecanismo extensor. MÉTODOS: Foram avaliados 18 prontuários de pacientes que sofreram lesões traumáticas do aparelho extensor interessando a região entre a tuberosidade anterior da tíbia (TAT e o ápice da patela submetido à técnica de dispositivo de proteção. A idade variou de 22 a 69 anos, com média de 44 anos. Houve predomínio do sexo masculino em 67 % dos casos. O local mais acometido em 83 % dos casos foi o 1/3 apical da patela. Foi elaborado um protocolo para coleta dos dados informativos relacionando os pacientes e a sua evolução obtida em seus prontuários. RESULTADOS: Observamos a consolidação da fratura de patela em todos os 17 pacientes, e a cicatrização do ligamento patelar num único caso. A dor esteve presente em quatro pacientes, sendo que não observamos nenhuma outra complicação relacionada com a técnica cirúrgica. CONCLUSÃO: O dispositivo de proteção é eficiente quando aplicado no tratamento operatório das lesões que se localizam entre o ápice da patela e a TAT propiciando movimentação ativa e passiva no pós-operatório imediato.OBJECTIVE: To evaluate results obtained using the protection device technique for osteosintesis or suture of extensor mechanism lesions. MATERIAL AND METHODS: The authors reviewed 18 charts of patients submitted to protection device technique due to traumatic lesion of extensor mechanism that had occurred between the anterior tibial tuberosity and the apical portion of patella. Age ranged from 22 to 69 years, with a mean of 44 years. Male patients prevailed, with 67% of the cases. The most affected spot was, in 83% of the cases, the apical distal third. A protocol was created to collect data, listing the patients and the clinical history from their medical records. RESULTS: The authors observed consolidation

  7. Limited open reduction is better for simple- distal tibial shaft fractures than minimally invasive plate osteosynthesis.

    Science.gov (United States)

    Li, Q; Zeng, B F; Luo, C F; Song, S; Zhang, C Q; Kong, W Q

    2014-07-24

    The aim of this study was to compare the effects and indications of minimally invasive plate osteosynthesis (MIPO) and limited open reduction (LOR) for managing distal tibial shaft fractures. A total of 79 cases of distal tibial shaft fractures were treated surgically in our trauma center. The 79 fracture cases were classified into type A, B, and C (C1) according to the Arbeitsgemeinschaft für Osteosynthesefragen (AO) classification, with 28, 32, and 19 cases, respectively. Among the 79 fracture cases, 52 were closed fractures and 27 were open fractures (GUSTILO, I-II). After adequate preparation, 48 cases were treated with LOR and 31 cases were treated with MIPO. All cases were followed up for 12 to 18 months, with an average of 16.4 months. During the follow-up period, 76 fracture cases were healed in the first stage, whereas the 3 cases that developed non-union were treated by changing the fixation device and autografting. For types A, B, and some of C simple fractures (C1), LOR accelerated the fracture healing and lowered the non-union rate. One case suffered from regional soft tissue infection, which was controlled by wound dressing and intravenous antibiotics. Another case that developed local skin necrosis underwent local flap transplant. LOR promoted bone healing and lowered the non-union rate of several simple-distal tibial shaft fractures. Thereafter, the incidence of soft tissue complication was not significantly increased. However, for complex and comminuted fractures, MIPO was the preferred method for correcting bone alignment and protecting soft tissue, leading to functional recovery.

  8. Systematic review: comparative effectiveness of adjunctive devices in patients with ST-segment elevation myocardial infarction undergoing percutaneous coronary intervention of native vessels

    Directory of Open Access Journals (Sweden)

    Sobieraj Diana M

    2011-12-01

    Full Text Available Abstract Background During percutaneous coronary intervention (PCI, dislodgement of atherothrombotic material from coronary lesions can result in distal embolization, and may lead to increased major adverse cardiovascular events (MACE and mortality. We sought to systematically review the comparative effectiveness of adjunctive devices to remove thrombi or protect against distal embolization in patients with ST-segment elevation myocardial infarction (STEMI undergoing PCI of native vessels. Methods We conducted a systematic literature search of Medline, the Cochrane Database, and Web of Science (January 1996-March 2011, http://www.clinicaltrials.gov, abstracts from major cardiology meetings, TCTMD, and CardioSource Plus. Two investigators independently screened citations and extracted data from randomized controlled trials (RCTs that compared the use of adjunctive devices plus PCI to PCI alone, evaluated patients with STEMI, enrolled a population with 95% of target lesion(s in native vessels, and reported data on at least one pre-specified outcome. Quality was graded as good, fair or poor and the strength of evidence was rated as high, moderate, low or insufficient. Disagreement was resolved through consensus. Results 37 trials met inclusion criteria. At the maximal duration of follow-up, catheter aspiration devices plus PCI significantly decreased the risk of MACE by 27% compared to PCI alone. Catheter aspiration devices also significantly increased the achievement of ST-segment resolution by 49%, myocardial blush grade of 3 (MBG-3 by 39%, and thrombolysis in myocardial infarction (TIMI 3 flow by 8%, while reducing the risk of distal embolization by 44%, no reflow by 48% and coronary dissection by 70% versus standard PCI alone. In a majority of trials, the use of catheter aspiration devices increased procedural time upon qualitative assessment. Distal filter embolic protection devices significantly increased the risk of target revascularization

  9. Can Smartphones and Privacy Coexist Assessing Technologies and Regulations Protecting Personal Data on Android and iOS Devices

    Science.gov (United States)

    2016-01-01

    C O R P O R A T I O N Can Smartphones and Privacy Coexist? Assessing Technologies and Regulations Protecting Personal Data on Android and iOS...Karlyn D. Stanley, Jeffrey Stewart, Ari Trachtenberg, Zev Winkelman • Google Android and Apple iOS ecosystems differ fundamentally, largely because of...their parent compa- nies’ different business models. However, the platforms’ tools and protections appear to be converging: Android is adopting run

  10. RESULT OF PRE-CONTOURED DISTAL RADIUS INDIAN LOCKING PLATES IN DISTAL RADIUS FRACTURE

    OpenAIRE

    Shaleen; Baljit; Aditya; Parminder; Simarpreet S

    2014-01-01

    BACKGROUND: Fractures of the distal radius are common, open reduction and internal fixation using an interlocking plate system has gained popularity for the treatment of dorsally displaced distal radius fractures. The aim of the study was to assess how adequately distal radial fracture reduction was reproduced and maintained with the pre-contoured distal radius Indian locking plates and to evaluate the functional and radiological results of treating unstable distal radius ...

  11. IAEA calls for enhanced radiation protection of patients. Safety specialists warn against overuse of new imaging devices

    International Nuclear Information System (INIS)

    2009-01-01

    Advances in medical imaging techniques are allowing doctors to detect hidden diseases and make ever more accurate diagnoses. But radiation safety experts at the International Atomic Energy Agency (IAEA) say that overuse of high-tech scanning procedures may unnecessarily expose patients to increased radiation levels. The IAEA, in collaboration with other international organizations, is developing a series of measures aimed at strengthening patient protection. The focus of recent efforts is a Smart Card project, to log how much radiation a person receives in the course of a lifetime. Concern surrounds procedures such as computed tomography (CT) scans because they deliver higher doses of radiation to patients in comparison to conventional X-rays (radiographs). It's been estimated that the average radiation dose of one CT scan is equal to roughly 500 chest X-rays. And that can increase a patient's lifetime risk of cancer, particularly if CT scans are repeated. The IAEA is one of the key international players in the field of patient radiation protection. A unit dedicated to the Radiological Protection of Patients (RPoP) was established in 2001. The IAEA's activities in radiation protection of patients include training, knowledge sharing and capacity building in the medical use of radiation. Extensive, up-to-date training material for health professionals is freely available on the RPoP website. An International Action Plan on the Radiological Protection of Patients that has been established together with leading international organizations such as the World Health Organization (WHO), UNSCEAR, the International Commission on Radiological Protection (ICRP) and others to identify strategies for strengthening radiation protection of patients. Coordinating and managing technical cooperation projects with Member States on patient dose assessment. The aim is to identify the factors that contribute to unnecessary radiation dose to patients, provide guidance on dealing with

  12. Spleen-preserving distal pancreatectomy in trauma.

    Science.gov (United States)

    Schellenberg, Morgan; Inaba, Kenji; Cheng, Vincent; Bardes, James M; Lam, Lydia; Benjamin, Elizabeth; Matsushima, Kazuhide; Demetriades, Demetrios

    2018-01-01

    Traumatic injuries to the distal pancreas are infrequent. Universally accepted recommendations about the need for routine splenectomy with distal pancreatectomy do not exist. The aims of this study were to compare outcomes after distal pancreatectomy and splenectomy versus spleen-preserving distal pancreatectomy, and to define the appropriate patient population for splenic preservation. All patients who underwent distal pancreatectomy (January 1, 2007, to December 31, 2014) were identified from the National Trauma Data Bank. Patients with concomitant splenic injury and those who underwent partial splenectomy were excluded. Demographics, clinical data, procedures, and outcomes were collected. Study groups were defined by surgical procedure: distal pancreatectomy and splenectomy versus spleen-preserving distal pancreatectomy. Baseline characteristics between groups were compared with univariate analysis. Multivariate analysis was performed with logistic and linear regression to examine differences in outcomes. Over the 8-year study period, 2,223 patients underwent distal pancreatectomy. After excluding 1,381 patients with concomitant splenic injury (62%) and 8 (pancreatectomy and splenectomy, those who underwent spleen-preserving distal pancreatectomy were younger (p pancreatectomy (p = 0.017). Complications, mortality, and intensive care unit LOS were not significantly different. In young patients after blunt trauma who are not severely injured, a spleen-preserving distal pancreatectomy should be considered to allow for conservation of splenic function and a shorter hospital LOS. In all other patients, the surgeon should not hesitate to remove the spleen with the distal pancreas. Therapy, level IV.

  13. Genetics Home Reference: distal hereditary motor neuropathy, type V

    Science.gov (United States)

    ... Distal hereditary motor neuropathy, type V Distal hereditary motor neuropathy, type V Printable PDF Open All Close All Enable ... link) PubMed OMIM (2 links) NEURONOPATHY, DISTAL HEREDITARY MOTOR, TYPE VA NEURONOPATHY, DISTAL HEREDITARY MOTOR, TYPE VB Sources ...

  14. CT virtual reality in the preoperative workup of malunited distal radius fractures: preliminary results

    International Nuclear Information System (INIS)

    Rieger, Michael; Gruber, Hannes; Jaschke, Werner R.; Gabl, Markus; Mallouhi, Ammar

    2005-01-01

    Our objective was to evaluate the usefulness of CT virtual preoperative planning in the surgical repositioning of malunited distal radius fracture. Eleven patients with malunited distal radius fracture underwent multislice CT of both wrists. A preoperative workup was performed in a virtual reality environment created from the CT data sets. Virtual planning comprised three main procedures, carrying out the virtual osteotomy of the radius, prediction of the final position of the distal radius after osteotomy and computer-assisted manufacturing of a repositioning device, which was later placed at the surgical osteotomy site to reposition objectively the distal radius fragment before fixation with the osteosynthesis. All patients tolerated the surgical procedure well. During surgery, the orthopedic surgeons were not required in any of the cases to alter the position of the distal radius that was determined by the repositioning device. At postoperative follow-up, the anatomic relationship of the distal radius was restored (radial inclination, 21.4 ; volar tilt, 10.3 ; ulnar variance, 0.5 mm). Clinically, a significant improvement of pronation (P=0.012), supination (P=0.01), flexion (P=0.001) and extension (P=0.006) was achieved. Pain decreased from 54 to 7 points. CT virtual reality is a valuable adjunct for the preoperative workup and surgical reposition of malunited distal radius fractures. (orig.)

  15. [Stress fractures of the distal fibula in an osteoporotic woman].

    Science.gov (United States)

    Schwartz, Frederik; Heerfordt, Ida Marie

    2014-08-04

    We report a case of an 81-year-old osteoporotic woman, who suffered stress fractures of the distal fibula on both sides within a two-year period. The risk factors for stress fractures are reviewed and the importance of a high index of suspicion for stress fractures is emphasized. When a stress fracture is suspected it should lead to plain radiography and treatment with protected weight-bearing with crutches or a brace.

  16. A Novel Technique Using a Protection Filter During Fibrin Sheath Removal for Implanted Venous Access Device Dysfunction

    Energy Technology Data Exchange (ETDEWEB)

    Sotiriadis, Charalampos; Hajdu, Steven David [University Hospital of Lausanne, Cardiothoracic and Vascular Unit, Department of Radiology (Switzerland); Degrauwe, Sophie [University Hospital of Lausanne, Department of Cardiology (Switzerland); Barras, Heloise; Qanadli, Salah Dine, E-mail: salah.qanadli@chuv.ch [University Hospital of Lausanne, Cardiothoracic and Vascular Unit, Department of Radiology (Switzerland)

    2016-08-15

    With the increased use of implanted venous access devices (IVADs) for continuous long-term venous access, several techniques such as percutaneous endovascular fibrin sheath removal, have been described, to maintain catheter function. Most standard techniques do not capture the stripped fibrin sheath, which is subsequently released in the pulmonary circulation and may lead to symptomatic pulmonary embolism. The presented case describes an endovascular technique which includes stripping, capture, and removal of fibrin sheath using a novel filter device. A 64-year-old woman presented with IVAD dysfunction. Stripping was performed using a co-axial snare to the filter to capture the fibrin sheath. The captured fragment was subsequently removed for visual and pathological verification. No immediate complication was observed and the patient was discharged the day of the procedure.

  17. Device for protecting the section of the airline electricity transmission with insulated neutral from incomplete phase modes

    Energy Technology Data Exchange (ETDEWEB)

    Sagutdinov, R.Sh.; Batoyev, D.

    1982-01-01

    The device for USSR certificate of authorship 792439 is improved in order to raise reliability of isolating the damage zone by including into operation an antenna filter for voltage of zero sequence (AFNIP) only during the operating time of the electrical unit in incomplete phase mode. The newly introduced circuit breaker contract of the inlet relay of the voltage filter for reverse sequence is connected between the outlet of the AFNIP and the ground. The device additionally has a time relay which is connected to the outlet of the voltage filter of reverse sequence. The circuit breaker contact of the inlet relay AFNIP is connected in series to the closure contact of the time relay and the winding of the second outlet relay of the actuating mechanism.

  18. Metoda ispitivanja kompatibilnosti sredstava lične NHB zaštite / Method of testing compatibility of personal NBC protection devices

    Directory of Open Access Journals (Sweden)

    Dušan Rajić

    2009-07-01

    Full Text Available Na primeru izabranih sredstava lične NHB zaštite demonstrirana je primena metode procene kompatibilnosti, kao vrlo bitne taktičko-tehničke karakteristike za svako novouvedeno sredstvo naoružanja i vojne opreme (NVO u Vojsci Srbije. Utvrđeno je da zaštitno filtrirajuće odelo, zaštitni laki ogrtač i zaštitne rukavice ispunjavaju postavljene kriterijume kompatibilnosti. Opisana metoda provere kompatibilnosti može da se primenjuje i na druga sredstva NVO u fazama razvoja, proizvodnje i eksploatacije. / The selected personal NBC protection devices have served as an example for demonstrating the application of the compatibility evaluation method as a very important tactical-technical characteristic of each newly introduced item of weapon and military equipment in the Serbian army. It has been determined that a filtering protective suit, a light protective coat and protective gloves meet the required criteria of compatibility. The described method of testing compatibility can be also applied to other weapons and military equipment in stages of development, production and exploitation.

  19. Development and operational results of a real-time remote biological information monitoring device for the workers wearing protective clothes at a nuclear facility

    International Nuclear Information System (INIS)

    Takahashi, Naoki; Lee, Joo-Young; Wakabayashi, Hitoshi; Tochihara, Yutaka

    2011-01-01

    Workers must wear a respirator and protective clothing to prevent inhalation and contamination by radioactive materials when carrying out certain inspection, maintenance activities at nuclear facilities and other emergency situations. Temperature and humidity increase with time within the protective clothing during such work. This is because the protective clothing is necessarily impermeable so that heat and perspiration caused by physical labor remain. Therefore, the worker's body temperature and related heatstroke risk gradually increase. To date, workers wearing the protective clothing have been supervised by time management and individual subjective information. This conventional management method may not efficiently monitor any change of heat load and workers' related health conditions. We therefore combine objective physiological information (including measured worker's infrared tympanic temperature and heart rate) with individual subjective information, in order to reduce the risk of heatstroke. To this end, a remote (heat strain) monitoring device has been developed. In this paper, we present an overview of the system, the result of functional and efficiency evaluation and operational results obtained under actual working conditions. (author)

  20. Water-in-oil-in-water emulsion obtained by glass microfluidic device for protection and heat-triggered release of natural pigments.

    Science.gov (United States)

    Comunian, Talita A; Ravanfar, Raheleh; Alcaine, Samuel David; Abbaspourrad, Alireza

    2018-04-01

    Anthocyanins and norbixin are natural pigments used in food; however, they are unstable. The aim of this study was to evaluate the microencapsulation technique to protect these pigments. Elderberry extract (source of anthocyanins) and norbixin were encapsulated using a microfluidic device with palm oil as middle phase in a water-in-oil-in-water emulsion. The formulations were characterized for morphology, particle size, encapsulation efficiency, zeta potential, color release under heating, Fourier transform infrared spectrophotometry, and color stability under different conditions. Spherical, mononucleated microcapsules, with particle size of 187-190 μm (elderberry) and 164-184 μm (norbixin), and with encapsulation efficiencies values of 47.80-54.87% (elderberry) and 49.18-74.73% (norbixin) were obtained. The formulations showed high color retention, with the encapsulated elderberry extract stored at pH 3.0 being the most stable. This study shows that the microencapsulation of these pigments using a microfluidic device provided protection, and represents a new method for anthocyanins and norbixin delivery in foods. Copyright © 2018 Elsevier Ltd. All rights reserved.

  1. A field investigation of hearing protection and hearing enhancement in one device: for soldiers whose ears and lives depend upon it.

    Science.gov (United States)

    Casali, John G; Ahroon, William A; Lancaster, Jeff A

    2009-01-01

    Operational hearing protection and maintenance of audibility of signals and speech are considered force multipliers in military operations, increasing Soldier survivability and lethality. The in-field research described in this paper was conducted to examine operational performance effects of three different hearing enhancement protection systems (HEPS) that are intended to provide both protection and audibility. The experiment utilized operationally-defined measures in full-scale, simulated combat scenarios with Army ROTC Cadet Soldiers as subjects. The Soldiers' operational performance was evaluated in two missions: reconnaissance and raid (attack on enemy camp). Both missions had substantial hearing requirements, including communications, signal detection/recognition, and distance judgments. Operational performance was measured by objective metrics of Squad performance, including the distances required to detect an enemy insurgent camp under each HEPS, and by subjective metrics, such as the Army's dimensions of combat-related mission success as evaluated by Army Officers who served as training leaders/observers. Other subjective ratings were obtained after each training exercise from both the Officers and the Soldiers, including detailed impressions about each HEPS after extended use. Two of the three HEPS were electronic sound transmission devices (comprising an ambient sound pass-through filtering and amplification circuit): a Peltor Comtac II circumaural headset (NRR=21; 16 dB maximum gain); and a Communications Enhancement Protection System (CEPS) (NRR=29; 36 dB maximum gain). One passive, level-dependent HEPS was used, the yellow end of the Combat Arms Earplug, which provides amplitude-sensitive attenuation that sharply increases when the ambient sound is above about 110 dB (e.g., due to a gunshot), but which provides an NRR of 0 and very little attenuation below 1000 Hz in lower ambient noise levels. In the military mission entailing location of and attack

  2. Bucket and straw technique to facilitate passage of a ventriculoperitoneal shunt through the distal tunneling sheath.

    Science.gov (United States)

    Downes, Angela E; Vandergrift, William A; Beckman, Joshua M; Truong, Devon; Tuite, Gerald F

    2014-12-01

    Placement of a ventriculoperitoneal shunt (VPS) is a procedure comprising many small steps. Difficulties and delays can arise when passing the distal shunt tubing down the distal tunneling sheath during surgery. The authors of this report describe a simple technique for quickly passing the distal catheter of a VPS through the tunneler sheath, whereby the sheath is used as a fluid tube to allow the distal catheter to be drawn through the fluid tube under suction pressure. The plastic sheath that surrounds the shunt tunneler device is used as a fluid tube, or "straw," with the proximal aperture submerged into a bucket of sterile irrigation liquid containing the distal catheter. Suction pressure is placed against the distal aperture of the tunneler, and the shunt catheter is quickly drawn through the sheath. No special equipment is required. In time trials, the bucket and straw technique took an average of 0.43 seconds, whereas traditional passage methods took 32.3 seconds. The "bucket and straw" method for passing distal shunt tubing through the tunneler sheath is a technique that increases surgical efficiency and reduces manual contact with shunt hardware.

  3. Contemporary Management of Primary Distal Urethral Cancer

    NARCIS (Netherlands)

    Traboulsi, S.L.; Witjes, J.A.; Kassouf, W.

    2016-01-01

    Primary urethral cancer is one of the rare urologic tumors. Distal urethral tumors are usually less advanced at diagnosis compared with proximal tumors and have a good prognosis if treated appropriately. Low-stage distal tumors can be managed successfully with a surgical approach in men or radiation

  4. Use of the intraosseous screw for unilateral upper molar distalization and found well balanced occlusion

    Directory of Open Access Journals (Sweden)

    Buyukyilmaz Tamer

    2006-11-01

    Full Text Available Abstract Background The aim of this study was to present a temporary anchorage device with intraosseous screw for unilateral molar distalization to make a space for the impacted premolar and to found well balanced occlusion in a case. Case presentation A 13-year-old male who have an impacted premolar is presented with skeletal Class I and dental Class 2 relationship. The screw was placed and immediately loaded to distalize the left upper first and second molar. The average distalization time to achieve an overcorrected Class I molar relationship was 3.6 months. There was no change in overjet, overbite, or mandibular plane angle measurements. Mild protrusion (0.5 mm of the upper left central incisor was also recorded. Conclusion Immediately loaded intraosseous screw-supported anchorage unit was successful in achieving sufficient unilateral molar distalization without anchorage loss. This treatment procedure was an alternative treatment to the extraction therapy.

  5. Methods for the Application of Programmable Logic Devices in Electronic Protection Systems for High Energy Particle Accelerators

    CERN Document Server

    Kwiatkowski, Maciej; Todd, Benjamin

    The present thesis was realised within the framework of the Doctoral Student programme at the European Organisation for Nuclear Research CERN, which is situated near Geneva. The aim of this thesis was to develop a method for reliable firmware implementation and to use that method to implement a new firmware for the Safe Machine Parameters (SMP) system. That system relies heavily on the Field Programmable Gate Arrays (FPGA) and it is one of the key machine protection systems of the Large Hadron Collider (LHC). The conception of the SMP hardware originates from the fully tested Beam Interlock System (BIS) being a result of another PhD thesis. For that reason the reliable SMP hardware was preserved unchanged. The first version of the SMP was ready for the LHC startup in the year 2008. Nevertheless the quality of the SMP firmware was objectionable. There were new requirements and therefore the SMP specification was extended. On that occasion it was decided that the existing SMP firmware will not be continued and ...

  6. Methods for the application of programmable logic devices in electronic protection systems for high energy particle accelerators

    CERN Document Server

    Kwiatkowski, M

    2014-01-01

    The present thesis was realised within the framework of the Doctoral Student programme at the European Organisation for Nuclear Research CERN, which is situated near Geneva. The aim of this thesis was to develop a method for reliable rmware implementation and to use that method to implement a new rmware for the Safe Machine Parameters (SMP) system. That system relies heavily on the Field Programmable Gate Arrays (FPGA) and it is one of the key machine protection systems of the Large Hadron Collider (LHC). The conception of the SMP hardware originates from the fully tested Beam Interlock System (BIS) being a result of another PhD thesis [1]. For that reason the reliable SMP hardware was preserved unchanged. The rst version of the SMP was ready for the LHC startup in the year 2008. Nevertheless the quality of the SMP rmware was objectionable. There were new requirements and therefore the SMP speci cation was extended. On that occasion it was decided that the existing SMP rmware will not be continued and that it...

  7. Pisiform malalignment associated with distal radius fractures.

    Science.gov (United States)

    Tajima, Takafumi; Zenke, Yukichi; Yamanaka, Yoshiaki; Menuki, Kunitaka; Sakai, Akinori

    2018-03-01

    The association of scaphoid or other carpal bone fractures with distal radius fractures is frequently reported, whereas few studies have described pisiform malalignment associated with distal radius fractures. The purpose of this study was to investigate the frequency and characteristics of pisiform malalignment associated with distal radius fractures. We performed a retrospective study by reviewing the data of 152 consecutive patients with a mean age of 63 years who were treated surgically for distal radius fractures during a five-year period. We evaluated the pisotriquetral joint via preoperative sagittal computed tomography (CT) and assessed pisiform malalignment. Pisiform malalignment was defined as follows: (1) wide type, joint space ≥4.0 mm; (2) non-parallel type, loss of parallelism of the joint surface of ≥20°; or (3) overriding type, proximal or distal overriding of the pisotriquetral joint ≥2.0 mm. We investigated the relationship between pisiform malalignment and the patterns of distal radius fractures. Pisiform malalignment was assessed using postoperative CT to determine whether it had been reduced. Pisiform malalignment was observed in 48 cases involving 44 patients with a mean age of 58 (17-81) years. The patients included 16, 17, and 15 cases of the wide type, non-parallel type, and overriding type, respectively. Distal radius fractures with dorsal displacement exhibited pisiform malalignment significantly more frequently than those with volar displacement. No significant difference was noted between intra- and extra-articular fractures or between patients with and without distal ulnar fractures. Among the 22 pisiform malalignment cases assessed via postoperative CT, 15 cases were reduced, and 7 cases remained malaligned. The non-parallel type exhibited the lowest reduction rate among the 3 types. Among distal radius fractures, 29% were complicated by pisiform malalignment. Distal radius fractures with dorsal displacement exhibited a

  8. Distal movement of maxillary canines and premolars with sectional mechanics following Distal Jet application to molars.

    Science.gov (United States)

    Bolla, E; Doldo, T; Giorgetti, R

    2004-01-01

    to assess the effectiveness of Distal Jet without simultaneous fixed appliance treatment. twenty subjects with Class II malocclusion who received the Distal Jet appliance to move maxillary molars distally. Subsequently, the canine and premolar distal movements were achieved by the use of.017 x.025 Ni-Ti sectional wires and memory power chain. revealed that Distal Jet is more effective with less anchorage loss when this appliance is used independent of multibracket appliances. this study showed that Distal Jet is an effective and predictable appliance. The distal movements of upper premolars, canines and incisors with sectional wires fabricated from.017 x.025 Ni-Ti were biomechanically very effective, simple in clinical application, and did not require any patient compliance.

  9. Load transfer at the distal ulna following simulated distal radius fracture malalignment.

    Science.gov (United States)

    Ferreira, Louis M; Greeley, Gillian S; Johnson, James A; King, Graham J W

    2015-02-01

    To measure the effects of distal radius malalignment on loading at the distal ulna. Using an adjustable mechanism to simulate angulated and translated malalignments, clinically relevant distal radius deformities were simulated in a cadaveric model. A custom-built load cell was inserted just proximal to the native ulna head to measure the resultant force and torque in the distal ulna. Loads were measured before and after transecting the triangular fibrocartilage complex (TFCC). There was an increase in distal ulna load and torque with increasing dorsal translation and angulation. Combined conditions of angulation and translation increased force and torque in the distal ulna to a greater extent than with either condition in isolation. Transecting the TFCC resulted in a reduction in distal ulna load and torque. A progressive increase in load at the distal ulna was observed with increasing severity of malalignment, which may be an important contributor to residual ulnar wrist pain and dysfunction. However, no clear-cut threshold of malalignment of a dorsally angulated and translated distal radius fracture was identified. These observations suggest that radius deformities cause articular incongruity, which increases TFCC tension and distal radioulnar joint load. Cutting of the TFCC decreased distal ulna loading, likely by releasing the articular constraining effect of the TFCC on the distal radioulnar joint, allowing the radius to rotate more freely with respect to the ulna. Anatomical reduction of a distal radius fracture minimizes the forces in the distal ulna and may reduce residual ulnar wrist pain and dysfunction. Copyright © 2015 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.

  10. Genetics Home Reference: distal 18q deletion syndrome

    Science.gov (United States)

    ... Health Conditions Distal 18q deletion syndrome Distal 18q deletion syndrome Printable PDF Open All Close All Enable ... view the expand/collapse boxes. Description Distal 18q deletion syndrome is a chromosomal condition that occurs when ...

  11. Villous adenoma of the distal appendix.

    Science.gov (United States)

    Taylor, J V; Thomas, M G; Kelly, S; Sutton, R

    1997-04-01

    Villous adenoma confined to the distal appendix has not been previously reported in conjunction with acute apendicitis. The presence of an adenoma indicates a need for further investigation due to an association with neoplasia elsewhere.

  12. Genetics Home Reference: distal arthrogryposis type 1

    Science.gov (United States)

    ... 1 is a disorder characterized by joint deformities (contractures) that restrict movement in the hands and feet. ... distal arthrogryposis type 1 . However, researchers speculate that contractures may be related to problems with muscle contraction ...

  13. Conceptualizing distal drivers in land use competition

    DEFF Research Database (Denmark)

    Niewhöner, Jörg; Nielsen, Jonas Ø; Gasparri, Gasparri

    2016-01-01

    This introductory chapter explores the notion of ‘distal drivers’ in land use competition. Research has moved beyond proximate causes of land cover and land use change to focus on the underlying drivers of these dynamics. We discuss the framework of telecoupling within human–environment systems...... as a first step to come to terms with the increasingly distal nature of driving forces behind land use practices. We then expand the notion of distal as mainly a measure of Euclidian space to include temporal, social, and institutional dimensions. This understanding of distal widens our analytical scope...... for the analysis of land use competition as a distributed process to consider the role of knowledge and power, technology, and different temporalities within a relational or systemic analysis of practices of land use competition. We conclude by pointing toward the historical and social contingency of land use...

  14. Computer-assisted surgery for screw insertion into the distal sesamoid bone in horses: an in vitro study.

    Science.gov (United States)

    Gygax, Diego; Lischer, Christoph; Auer, Joerg A

    2006-10-01

    To compare the precision of computer-assisted surgery with a conventional technique (CV) using a special guiding device for screw insertion into the distal sesamoid bone in horses. In vitro experimental study. Cadaveric forelimb specimens. Insertion of a 3.5 mm cortex screw in lag fashion along the longitudinal axis of intact (non-fractured) distal sesamoid bones was evaluated in 2 groups (8 limbs each): CV and computer-assisted surgery (CAS). For CV, the screw was inserted using a special guiding device and fluoroscopy, whereas for CAS, the screw was inserted using computer-assisted navigation. The accuracy of screw placement was verified by radiography, computed tomography, and specimen dissection. Surgical precision was better in CAS compared with CV. CAS improves the accuracy of lateromedial screw insertion, in lag fashion, into the distal sesamoid bone. The CAS technique should be considered for improved accuracy of screw insertion in fractures of the distal sesamoid bone.

  15. Development of a new model of actinic enteritis in rats using a cobalt-60 open source and a protection device as a collimator

    Energy Technology Data Exchange (ETDEWEB)

    Nunes, Vinicius Rodrigues Taranto; Vidigal, Paula Vieira Teixeira; Barbuto, Rafael Calvao; Duval-Araujo, Ivana, E-mail: vivas1912@hotmail.com [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte (UFMG), MG (Brazil); Pereira, Marcio Tadeu; Ladeira, Luis Carlos Duarte [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2017-03-15

    Purpose: To describe a new model of actinic enteritis that does not use radiotherapy machines. Methods: Sixteen Wistar rats were divided into four groups, consisting of four animals each: control (group A), two weeks after irradiation (group B), five weeks after irradiation (group C) and eight weeks after irradiation (group D). Animals were given a 10Gy radiation from a Cobalt-60 natural source in a nuclear technology research center. Protections of the surrounding tissues were obtained through the usage of plumb devices with a hole in the center, which served as a collimator. We obtained irradiated and non-irradiated colons from each animal. Results: In group B we found an important inflammatory response in the irradiated colon, which appeared in a reduced way in group C and was minimal in group D, in which we found a relevant collagen submucosal deposition/fibrosis. In all groups, the non-irradiated colon had a lower pathological damage in comparison with the irradiated colon. Conclusion: We thus described an efficient and feasible technique for obtaining an animal model of actinic enteritis. (author)

  16. Web software for the control and management of radiation protection devices in the Cadarache site; Application WEB pour le controle et la gestion des appareils de radioprotection sur le centre de Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    Beltritti, F. [CEA Cadarache 13108 St Paul lez Durance Cedex (France)

    2010-07-01

    This series of slides presents how to use a new software dedicated to the management of the periodical controls that have to be performed on the equipment involved in radiation protection. This software is ready to be dispatched on the CEA site of Cadarache. This software gives information on: the device to be controlled, the controls that have to be performed, the procedures to follow to make the test, the equipment necessary for the test particularly the need for radioactive sources, the maintenance of the device, the previous measurements and in the end the device's conformity. An evaluation of the conformity of all the devices present in a building or an area or of a particular type can be easily obtained. (A.C.)

  17. Distal biceps rupture: the coil sign.

    Science.gov (United States)

    Austin, Luke; Pepe, Matt; VanBeek, Corinne; Tjoumakaris, Fotios

    2014-06-01

    Delayed repair of the distal biceps brachii tendon can lead to the formation of scar tissue and coiling of the tendon. Dissection of the scar tissue and unraveling of the tendon may allow for anatomic repair to the radial tuberosity. A 50-year-old man had a distal biceps brachii tendon tear with an intact lacertus fibrosis. Surgery was performed 22 days after injury. On inspection, the distal biceps tendon was coiled, encased in scar tissue, and unable to be reduced to the radial tuberosity. Dissection of the scar tissue and unraveling of the tendon provided additional length, allowing anatomic repair. Postoperatively, the patient regained full range of motion and strength and returned to work without restrictions. After a distal biceps brachii tear in which the lacertus fibrosis remains intact, the coiled tendon may become enveloped in a sheath of scar tissue. Dissection of the "pseudosheath" unveils the native tendon and allows reduction to the radial tuberosity. Cadaveric analysis shows that the pseudosheath may conceal 6 cm of coiled tendon. When the lacertus fibrosis remains intact after distal biceps tendon rupture, the tethered tendon stump may coil, become encased in scar tissue, and resemble the native tendon. Failure to identify the native tendon could result in the loss of 6 cm of tendon. Copyright 2014, SLACK Incorporated.

  18. Outcomes of Distal Femur Fracture Treated with Dynamic Condylar Screw

    International Nuclear Information System (INIS)

    Razaq, M. N. U.; Muhammad, T.; Ahmed, A.; Adeel, M.; Ahmad, S.; Ahmad, S.; Sultan, S.

    2016-01-01

    Background: Implants for open reduction and internal fixation of distal femoral fracture includes angle blade plate, rush nails, enders nail and interlocking nails. But all these devices are technically demanding and less effective in providing inter-fragmentary compression in osteoporotic bones. These problems can be solved with dynamic condylar screw (DCS).The objective of the study was to determine the frequency of different outcomes of distal femoral fracture treated with dynamic condylar screw Methods: This case series study was carried out in the Department of Trauma and Orthopaedics, Ayub Teaching Hospital Abbottabad from 1st October 2014 to August 2015, after approval of the ethical committee of the institution. Data of all patients with distal femoral fractures aged 20-70 years, recruited through emergency, OPD or consultant clinic collected on a proforma. Standard treatment of trauma was given to the patients. Detailed history was taken including the past medical and surgical history. Detailed examination including air-way, breathing and circulation, general physical examination and abdomino-pelvic examination was done in each patient. Investigations including urinalysis, haemoglobin percent, full blood count, X-ray (both AP and lateral view) of the involved femur (including hip and knee) was done. Results: Mean age of the patients was 43.18±14.647 ranging from 20 to 70 years. Mean duration of hospital stay in days was 2.21±1.111 ranging from 1 to 6 days. Patients follow-up assessment after 4 months of surgery for union of femoral fracture treated with dynamic condylar screw was found in 96 (94.1 percent), wound infection was found in 7 (6.9 percent), knee stiffness was found in 21 (20.6 percent) and limb shortening was found in 7 (6.9 percent). Conclusion: Dynamic condylar screw is an easy, scientifically less difficult and satisfying method of treatment for fractures of femur. (author)

  19. Potassium secretion in mammalian distal colon

    DEFF Research Database (Denmark)

    Sørensen, Mads Vaarby

    2009-01-01

    . This research project is the summary of 3 original papers addressing the functional role of different regulating factors on ion transport in mouse distal colon. The first paper addresses the effect of luminal nucleotides on electrogenic Na+ absorption. The distal colon, like the distal nephron is an aldosterone......2 subunits in mice treated on an aldosterone increasing diet (high K+). Immunolabelling showed BK channel localisation in the luminal membrane which also was up-regulated in animals treated on a high K+ diet. Taken together these results firmly prove that aldosterone-stimulated K+ secretion......-/- mouse, we could functionally isolate the cAMP-activated K+ conductance as the BK channel. In addition we found the cAMP-activated K+ conductance to be further up-regulated by aldosterone. Taken together, these results show cAMP-activated K+ secretion occurs via a regulated specific splice variant...

  20. Osteochondritis of the Distal Tibial Epiphysis

    Directory of Open Access Journals (Sweden)

    Firass EL Hajj

    2012-01-01

    Full Text Available Osteochondritis of the distal tibial epiphysis is a very rare entity. 9 cases have been described in 7 articles and 8 other cases have been mentioned in textbooks. This paper describes the 10th case of osteochondritis of the distal tibial epiphysis and summarizes the clinical and radiological presentations of the 9 other cases. The etiology of this entity is well debated in the literature. We believe that it results from a vascular abnormality in the distal tibial epiphysis associated with a mechanical stress (trauma, excessive overload, etc.. Since it is a self-limited disease, the prognosis is good and the younger the patient is the better the prognosis will be. In general, this entity responds well to conservative treatment.

  1. Diagnostic modalities for distal radioulnar joint.

    Science.gov (United States)

    Jens, S; Luijkx, T; Smithuis, F F; Maas, M

    2017-05-01

    The first imaging modality in patients suspected of distal radioulnar joint pathology should be conventional radiography to exclude or diagnose wrist pathology including osteoarthritis, rheumatoid arthritis, calcium pyrophosphate deposition disease, (healed) fractures, or impaction syndromes. When conventional radiography is inconclusive, high resolution 3 Tesla magnetic resonance imaging is advised. We provide a broad overview of the literature regarding the use of intra-articular contrast both with computed tomography (CTA) or magnetic resonance imaging (MRA). Conventional arthrography and unenhanced computed tomography are not indicated. This article discusses the most useful imaging techniques in terms of clinical indications, patient positioning, technical imaging requirements, and diagnostic performance in patients with suspected distal radioulnar joint pathology. Furthermore, the most prevalent pathologies are discussed, with the focus on imaging characteristics in both stable and unstable distal radioulnar joints.

  2. Distal splenorenal shunt with partial spleen resection

    Directory of Open Access Journals (Sweden)

    Gajin Predrag

    2007-01-01

    Full Text Available Introduction: Hypersplenism is a common complication of portal hypertension. Cytopenia in hypersplenism is predominantly caused by splenomegaly. Distal splenorenal shunt (Warren with partial spleen resection is an original surgical technique that regulates cytopenia by reduction of the enlarged spleen. Objective. The aim of our study was to present the advantages of distal splenorenal shunt (Warren with partial spleen resection comparing morbidity and mortality in a group of patients treated by distal splenorenal shunt with partial spleen resection with a group of patients treated only by a distal splenorenal shunt. Method. From 1995 to 2003, 41 patients with portal hypertension were surgically treated due to hypersplenism and oesophageal varices. The first group consisted of 20 patients (11 male, mean age 42.3 years who were treated by distal splenorenal shunt with partial spleen resection. The second group consisted of 21 patients (13 male, mean age 49.4 years that were treated by distal splenorenal shunt only. All patients underwent endoscopy and assessment of oesophageal varices. The size of the spleen was evaluated by ultrasound, CT or by scintigraphy. Angiography was performed in all patients. The platelet and white blood cell count and haemoglobin level were registered. Postoperatively, we noted blood transfusion, complications and total hospital stay. Follow-up period was 12 months, with first checkup after one month. Results In the first group, only one patient had splenomegaly postoperatively (5%, while in the second group there were 13 patients with splenomegaly (68%. Before surgery, the mean platelet count in the first group was 51.6±18.3x109/l, to 118.6±25.4x109/l postoperatively. The mean platelet count in the second group was 67.6±22.8x109/l, to 87.8±32.1x109/l postoperatively. Concerning postoperative splenomegaly, statistically significant difference was noted between the first and the second group (p<0.05. Comparing the

  3. Management of Malunions of the Distal Radius

    OpenAIRE

    Yaniel Truffin Rodriguez; Osmany Pérez Martínez; Rafael Esmandy Gómez Arregoitía; Indira L. Gómez Gil

    2015-01-01

    Fractures of the distal radius often present with a group of major complications. Of these, malunion is one of the most disabling. Its management through salvage procedures is essential for its correction. The case of a 60-year-old healthy woman of urban origin treated at the Dr. Gustavo Aldereguía Lima University General Hospital in Cienfuegos because of a malunion of the distal end of the left radius as a result of a previous Colles' fracture is presented. The patient complained of severe p...

  4. Contemporary Management of Primary Distal Urethral Cancer.

    Science.gov (United States)

    Traboulsi, Samer L; Witjes, Johannes Alfred; Kassouf, Wassim

    2016-11-01

    Primary urethral cancer is one of the rare urologic tumors. Distal urethral tumors are usually less advanced at diagnosis compared with proximal tumors and have a good prognosis if treated appropriately. Low-stage distal tumors can be managed successfully with a surgical approach in men or radiation therapy in women. There are no clear-cut indications for the choice of the most appropriate treatment modality. Organ-preserving modalities have shown effective and should be used whenever they do not compromise the oncological safety to decrease the physical and psychological trauma of dismemberment or loss of sexual/urinary function. Copyright © 2016 Elsevier Inc. All rights reserved.

  5. Complicated distal femoral epiphyseolysis treated by Ilizarov method: Case report

    Directory of Open Access Journals (Sweden)

    Jovanović Vesna

    2010-01-01

    Full Text Available Introduction Injuries of the distal femur are rare in children; however, they are frequently associated with complications. They are almost always physeal, most frequently Salter-Harris type II epiphyseolysis. The treatment of such injuries is similar in all physeal injuries. It is intended to provide growth plate recovery by gentle reduction and stable fixation thus preventing secondary complications, and also to provide decompression of the segment to solve the compartment syndrome and recover the neurovascular structures. Case Outline A seven-year old boy presented with a right knee injury while sleigh riding. He was admitted three weeks following the injury with distal femoral epiphysiolysis associated with peroneal palsy. A day after admission to our Institute the reduction was performed using the Ilizarov device. Physical therapy was started immediately after surgery, as well as walking with weight bearing on the operated leg. Five months after surgery the patient was anatomically and functionally recovered. Conclusion The presented method is recommended in the treatment of such injuries because of several reasons; reposition is simple and complete, there is no need to open the fracture site, fixation is stable, the growth plate is preserved, there is no need for additional external immobilisation, and physical therapy involving walking with weight bearing on the operated leg may be started immediately after surgery. .

  6. Comparison of Maxillary Molar Distalization with an Implant-Supported Distal Jet and a Traditional Tooth-Supported Distal Jet Appliance

    Directory of Open Access Journals (Sweden)

    Mauro Cozzani

    2014-01-01

    Full Text Available Aim. To investigate and compare the efficiency of two appliances for molar distalization: the bone-anchored distal screw (DS and the traditional tooth-supported distal jet (DJ for molar distalization and anchorage loss. Methods. Tests (18 subjects were treated with a DS and controls (18 subjects were treated with a DJ. Lateral cephalograms were obtained before and at the end of molar distalization and were analysed. Shapiro Wilk test, unpaired t-test, and Wilcoxon rank-sum test were applied according to values distribution. The α level was fixed at 0.05. Results. Maxillary first molars were successfully distalized into a Class I relationship in all patients. The mean molar distalization and treatment time were similar in both groups. The DS group exhibited a spontaneous distalization (2.1±0.9 mm of the first premolar with control of anchorage loss, distal tipping, extrusion, and skeletal changes. Conclusions. The DS is an adequate compliance-free distalizing appliance that can be used safely for the correction of Class II malocclusions. In comparison to the traditional DJ, the DS enables not only a good rate of molar distalization, but also a spontaneous distalization of the first premolars.

  7. Fracture of the Distal Ulna Metaphysis in the Setting of Distal Radius Fractures.

    Science.gov (United States)

    Paksima, Nader; Khurana, Sonya; Soojian, Michael; Patel, Vipul; Egol, Kenneth

    2017-04-01

    Fracture of the metaphyseal region of the distal ulna is an uncommon injury that has been reported to occur concomitantly with distal radius fracture. We aimed to report the incidence and types of distal ulnar head and neck fractures associated with distal radius fractures and compare outcomes in operatively versus non-operatively treated patients. Over a 5-year period a distal radius fracture registry was maintained at our institution. Eleven of 512 consecutive patients had metaphyseal distal ulna fractures in association with distal radius fractures and at least 1-year follow-up. Baseline radiographs and functional data were obtained, and patients were followed at 1-week, 2-week, 3-week, 6-week, 3-month, 6-month, 1-year, and 2-year intervals. Patients were split into two treatment groups: Group 1 consisted of five non-operatively treated patients, and Group 2 consisted of six operatively treated patients. Four separate fracture patterns were observed: simple transverse or oblique fracture of the ulnar neck just proximal to the ulnar head, fracture of the neck region with concomitant fracture of the tip of the ulnar styloid, simple fracture of the ulnar head, and comminuted fracture of the ulnar head. There were no statistical differences between the two groups with regard to flexion, extension, supination, pronation, and functional outcomes. Ulnar fracture patterns observed did not easily fall into previously described categories, and we have proposed a new classification system. Simple fractures of the ulnar neck or head often do not require operative fixation.

  8. Main radiation protection actions for medical personnel as primary responders front of an event with radiological dispersive device; Principais acoes de protecao radiologica para equipe medica como primeiros respondedores frente a um evento com dispositivo de dispersao radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Duque, Hildanielle Ramos

    2015-07-01

    After the terrorist attack in New York, USA, in 2001, there was a worldwide concern about possible attacks using radioactive material in conventional detonators, called as Radiological Dispersal Device (RDD) or 'dirty bomb'. Several studies have been and are being made to form a global knowledge about this type of event. As until now, fortunately, there has not been an event with RDD, the Goiania Radiological Accident in Brazil, 1987, is used as a reference for decision-making. Several teams with technical experts should act in an event with RDD, but the medical staffs who respond quickly to the event must be properly protected from the harmful effects of radiation. Based on the radiological protection experts performance during the Goiania accident and the knowledge from lessons learned of many radiological accidents worldwide, this work presents an adaptation of the radiation protection actions for an event with RDD that helps a medical team as primary responders. The following aspects are presented: the problem of radioactive contamination from the explosion of the device in underground environment, the actions of the first responders and evaluation of health radiation effects. This work was based on specialized articles and papers about radiological accidents and RDD; as well as personal communication and academic information of the Institute of Radiation Protection and Dosimetry. The radiation protection actions, adapted to a terrorist attack event with RDD, have as a scenario a subway station in the capital. The main results are: the use of the basic radiation protection principle of time because there is no condition to take care of a patient keeping distance or using a shielding; the use of full appropriate protection cloths for contaminating materials ensuring the physical safety of professionals, and the medical team monitoring at the end of a medical procedure, checking for surface contamination. The main conclusion is that all medical actions

  9. Hormone replacement therapy, oral contraceptive use, and distal large bowel cancer: a population-based case-control study.

    Science.gov (United States)

    Long, Millie D; Martin, Christopher F; Galanko, Joseph A; Sandler, Robert S

    2010-08-01

    Lower incidence rates of distal large bowel cancer in women when compared with men support the protective role of female hormones. We aimed to determine the associations between hormone replacement therapy, oral contraceptive use, and distal large bowel cancer. We conducted a population-based case-control study of incident distal large bowel cancer in North Carolina between 2001 and 2006. Data on hormone replacement therapy, oral contraceptive use, demographics, and risk factors were obtained through in-person interviews. Odds ratios (ORs) and 95% confidence intervals (CIs) for the associations between oral contraceptive use, hormone replacement therapy, and distal large bowel cancer were estimated through unconditional logistic regression models overall, by duration of use, and within strata of race. There were a total of 443 women with distal large bowel cancer and 405 controls. Ever use of hormone replacement therapy was strongly associated with a reduced risk of distal large bowel cancer (OR 0.52, 95% CI 0.38-0.72). Further reduction of distal large bowel cancer risk occurred with increased duration of use (or=15 years (OR 0.34, 95% CI 0.20-0.58)). Ever use of oral contraceptives was not associated with reduced incidence of distal large bowel cancer (OR 0.95, 95% CI 0.67-1.34) nor was duration of use. There were no differences by race. Hormone replacement therapy is associated with a lower risk of distal large bowel cancer. This risk is further reduced with increased duration of use. Hormone replacement therapy may be partially responsible for the reduced incidence of distal large bowel cancer in women compared with men.

  10. Intramedullary nailing in distal tibial fracture

    Directory of Open Access Journals (Sweden)

    Damian Arroquy

    2015-11-01

    Methods The inclusion criteria of this study were skeletally mature patients with displaced fractures of the distal tibia treated with intramedullary nail with a minimum follow up of one year. Gustilo III open fractures and type C fractures of the AO classification (complete articular Stroke were excluded. The sample comprised 35 patients remained. The follow-up was 29.2 months. We evaluated the time of consolidation, malunion and complications. The functional results were described according to the AOFAS score. Results Of the 35 patients with fracture of the distal third of the tibia all of them presented fracture healing. The average time to union was 17.2 weeks (range: 11-26. Of the total sample, 5 patients had delayed union, requiring dynamic nail on average at 12 weeks. The malunion was present in 4 (11.4% patients. We found no  difference (p = 0.201 in the time to union between fractures associated with fractures of the fibula treated (13sem or not (17sem. The AOFAS score was 86 points. Conclusion Intramedullary nailing with multiple distal locks like a good alternative treatment for distal tibia fractures AO type A or B, with low complication rate and a high rate of consolidation.

  11. Medical Expulsive Therapy for Distal Ureteral Stones

    NARCIS (Netherlands)

    Tzortzis, Vassilios; Mamoulakis, Charalampos; Rioja, Jorge; Gravas, Stavros; Michel, Martin C.; de La Rosette, Jean J. M. C. H.

    2009-01-01

    Although minimally invasive treatments for ureteral stones are efficacious, they are not free of complications and are associated with high cost. Medical expulsive therapy (MET) has recently emerged as an alternative strategy for the initial management of small distal ureteral stories. A MEDLINE

  12. Endovascular treatment of ruptured distal posterior inferior ...

    African Journals Online (AJOL)

    2014-03-01

    Mar 1, 2014 ... Methods: 11 consecutive patients (7 women, 4 men, mean age of 49.2 years) with ruptured distal PICA aneurysms were studied retrospectively. All had onset of acute intraventricular or cerebellar haemorrhage, and subarachnoid hemorrhage. (SAH). Hunt-Hess (HH) grades were H-H I in 1 patient, H-H II in ...

  13. Urethral mobilization and advancement for distal hypospadias ...

    African Journals Online (AJOL)

    Background/purpose Despite the existence of numerous techniques for the repair of distal penile hypospadias, none of them is completely satisfactory. Advancing the urethra without mobilization for repair of glanular hypospadias has the advantage of avoiding a common problem occurring with other techniques: ...

  14. Double Plating of Distal Fibula Fractures.

    Science.gov (United States)

    Vance, Danica D; Vosseller, J Turner

    2017-12-01

    Distal fibula fractures are common orthopaedic injuries that often require open reduction internal fixation (ORIF) to anatomically reduce the fracture and minimize the risk of posttraumatic arthritis. In certain clinical situations, stouter fixation may be advantageous to decrease the risk of fixation failure. In this study, the authors report on 12 patients who underwent distal fibula ORIF with 2 one-third tubular plates. Twelve consecutive patients who underwent distal fibula ORIF with 2 one-third tubular plates were retrospectively reviewed. Clinical and radiographic outcomes were reviewed, and functional outcomes were obtained using the Foot and Ankle Outcome Score (FAOS). Institutional review board approval was obtained. All 12 fractures healed clinically and radiographically. One patient was lost to follow-up after healing of the fracture. One patient had removal of fibular hardware at 15 months after surgery. Ten patients had no hardware related pain and good ankle function. FAOS scores were obtained at a mean of 25.6 months after surgery and were as follows: pain (87.6, SD = 9.5), activities of daily living (90.4, SD = 14.5), symptoms (93.3, SD = 9.5), sports (89.5, SD = 18.1), and quality of life (57.4, SD = 21.3). Double plating of distal fibula fractures is a viable technique for problem fractures that potentially provides a readily accessible, low-cost alternative to other means of enhancing fixation. Level IV.

  15. Computed tomography diagnosis of distal radioulnar subluxation

    International Nuclear Information System (INIS)

    Wechsler, R.J.; Rifkin, M.D.; Edeiken, J.; Branch, H.M.

    1987-01-01

    Eight patients with suspected diagnosis of distal radioulnar joint (DRUJ) subluxation underwent computed tomographic (CT) scans of the wrist. Five underwent surgery and had DRUJ subluxation or dislocation; CT scans revealed subluxation in four. Three CT criteria for the evaluation of DRUJ subluxation are discussed and compared in this manuscript. (orig.)

  16. Deep pain thresholds in the distal limbs of healthy human subjects.

    Science.gov (United States)

    Rolke, R; Andrews Campbell, K; Magerl, W; Treede, R-D

    2005-02-01

    Pressure pain thresholds (PPTs) in distal limbs have been under-investigated despite their potential clinical importance. Therefore, we compared PPTs over nail bed, bony prominences, and muscle in distal parts of upper and lower limbs. We investigated 12 healthy subjects using three handheld devices: a spring-loaded, analogue pressure threshold meter (PTM) with two operating ranges, and an electronic Algometer. PPTs were determined with three series of ascending stimulus intensities with a ramp of about 50 kPa/s. PPTs were normally distributed in logarithmic space. PPTs over different tissues varied significantly (ANOVA, pAlgometer than with PTMs (ANOVA, ptesting over muscle. There was no significant right-left difference (ANOVA, p=0.33). In spite of considerable variability across subjects, reproducibility within subjects was high (correlation coefficients>0.90). For within-subject comparisons, threshold elevations beyond 33-43% would be abnormal (95% confidence intervals), whereas only deviations from the group mean by at least a factor of two would be abnormal with respect to absolute normative values. PPTs over distal muscles were comparable to published values on proximal limb and trunk muscles. These findings suggest that pressure pain testing over distal muscles may be a sensitive test for deep pain sensitivity and that the simple and less expensive devices are sufficient for testing this tissue type. Intra-individual site-to-site comparisons will be more sensitive than absolute normative values.

  17. Ulnar shortening osteotomy for distal radius malunion.

    Science.gov (United States)

    Kamal, Robin N; Leversedge, Fraser J

    2014-08-01

    Background Malunion is a common complication of distal radius fractures. Ulnar shortening osteotomy (USO) may be an effective treatment for distal radius malunion when appropriate indications are observed. Methods The use of USO for treatment of distal radius fracture malunion is described for older patients (typically patients >50 years) with dorsal or volar tilt less than 20 degrees and no carpal malalignment or intercarpal or distal radioulnar joint (DRUJ) arthritis. Description of Technique Preoperative radiographs are examined to ensure there are no contraindications to ulnar shortening osteotomy. The neutral posteroanterior (PA) radiograph is used to measure ulnar variance and to estimate the amount of ulnar shortening required. An ulnar, mid-sagittal incision is used and the dorsal sensory branch of the ulnar nerve is preserved. An USO-specific plating system with cutting jig is used to create parallel oblique osteotomies to facilitate shortening. Intraoperative fluoroscopy and clinical range of motion are checked to ensure adequate shortening and congruous reduction of the ulnar head within the sigmoid notch. Results Previous outcomes evaluation of USO has demonstrated improvement in functional activities, including average flexion-extension and pronosupination motions, and patient reported outcomes. Conclusion The concept and technique of USO are reviewed for the treatment of distal radius malunion when specific indications are observed. Careful attention to detail related to surgical indications and to surgical technique typically will improve range of motion, pain scores, and patient-reported outcomes and will reduce the inherent risks of the procedure, such as ulnar nonunion or the symptoms related to unrecognized joint arthritis.  Level IV.

  18. Simultaneous ipsilateral fractures of distal and proximal ends of the radius.

    Science.gov (United States)

    El Kadi, Khalid Ibn; Benabid, Mounir; Saliou, Sarr; El Assil, Oussama; Marzouki, Amine; Lahrach, Kamal; Boutayeb, Fawzi

    2017-01-01

    We treated a patient with a rare combination of ipsilateral fractures of the distal and proximal ends of the radius. A man aged 42 years had simultaneous fractures of the distal and proximal ends of the radius (radial neck) following a roadside accident. The distal end fracture of the radius was treated with surgical reduction and T-plate volar fixation, and the undisplaced radial neck fracture was treated by an above elbow splintage for 2 weeks. The elbow mobilization was started at 2 weeks. The distal radius was protected for another 4 weeks in a below elbow functional brace. Ipsilateral proximal and distal radial fracture is an uncommon injury pattern. The series illustrates a number of problems associated with this combination. Firstly, one should be aware of this rare injury pattern and there should be greater emphasis on clinical examination of elbow in cases of wrist injuries and vice versa. Once diagnosed, one faces the dilemma of appropriate management in these cases. The appropriate management will depend on the injury characteristics including the age of the patient and the fracture pattern. One should try to preserve the radial head to prevent a possible proximal radial migration especially in younger patients.

  19. MODELING PROTECTIVE DEVICES FOR DISTRIBUTION SYSTEMS WITH DISTRIBUTED GENERATION USING AN EMTP-TYPE TOOL REPRESENTACIÓN EN EMTP DE DISPOSITIVOS DE PROTECCIÓN DE REDES DE DISTRIBUCIÓN CON GENERACIÓN DISTRIBUIDA

    Directory of Open Access Journals (Sweden)

    Juan A Martínez-Velasco

    2010-08-01

    Full Text Available This paper presents the main features of a library of modules for representation of protective devices of distribution networks with distributed generation (DG. The impact of distributed generation in a distribution network depends, among other aspects, on the design of the protection system and the coordination between the different protective devices. The presence of distributed generation changes the radial nature of distribution systems and affects the performance of the protection system. This document discusses the present protection practices for distribution systems and DG interties, describes the implementation of protective devices (circuit breakers, relays, reclosers, fuses, sectionalizers in an EMTP-type tool, and presents some simulation results whose main goal is to analyze the impact of synchronous machine-based embedded generators on the coordination between the different types of protective devices.Este artículo presenta las características principales de una librería de módulos desarrollada para representar dispositivos de protección de una red de distribución de energía eléctrica con generación distribuida (GD. El impacto de la generación distribuida depende, entre otros aspectos, del diseño del sistema de protección, y de la coordinación entre los diferentes dispositivos de protección. La presencia de unidades generadoras altera el flujo radial inherente a un sistema de distribución y afecta al comportamiento del sistema de protección. Este trabajo presenta una introducción de los sistemas de protección de las redes de distribución y de la interconexión de unidades generadoras, describe la implantación de dispositivos de protección (interruptores, relés, reenganchadores, fusibles, seccionalizadores en un programa tipo EMTP, y presenta algunos resultados obtenidos mediante simulación, cuyo principal objetivo es ilustrar el impacto que la generación distribuida basada en generadores síncronos puede

  20. Does computer use affect the incidence of distal arm pain?

    DEFF Research Database (Denmark)

    Mikkelsen, Sigurd; Lassen, Christina Funch; Vilstrup, Imogen

    2012-01-01

    To study how objectively recorded mouse and keyboard activity affects distal arm pain among computer workers.......To study how objectively recorded mouse and keyboard activity affects distal arm pain among computer workers....

  1. Distal Fibula Fractures in National Football League Athletes

    OpenAIRE

    Werner, Brian C.; Mack, Christina; Franke, Kristina; Barnes, Ronnie P.; Warren, Russell F.; Rodeo, Scott A.

    2017-01-01

    Background: Despite the frequency of distal fibula fractures in elite athletes and the significant potential impact on the athletes’ season and future careers, little data exist characterizing the epidemiology of these injuries or, more importantly, return to competition. Purpose: To (1) evaluate the incidence of acute distal fibula fractures in National Football League (NFL) athletes, including isolated distal fibula and combined ankle fracture patterns; (2) analyze distal fibula fracture ra...

  2. Distal radioulnar joint: functional anatomy, including pathomechanics.

    Science.gov (United States)

    Haugstvedt, J R; Langer, M F; Berger, R A

    2017-05-01

    The distal radioulnar joint allows the human to rotate the forearm to place the hand in a desired position to perform different tasks, without interfering with the grasping function of the hand. The ulna is the stable part of the forearm around which the radius rotates; the stability of the distal radioulnar joint is provided by the interaction between ligaments, muscles and bones. The stabilizing structures are the triangular fibrocartilage complex, the ulnocarpal ligament complex, the extensor carpi ulnaris tendon and tendon sheath, the pronator quadratus, the interosseous membrane and ligament, the bone itself and the joint capsule. The purpose of this review article is to present and illustrate the current understanding of the functional anatomy and pathomechanics of this joint.

  3. Surgical treatment of distal biceps rupture.

    Science.gov (United States)

    Sutton, Karen M; Dodds, Seth D; Ahmad, Christopher S; Sethi, Paul M

    2010-03-01

    Rupture of the distal biceps tendon accounts for 10% of all biceps brachii ruptures. Injuries typically occur in the dominant elbow of men aged 40 to 49 years during eccentric contraction of the biceps. Degenerative changes, decreased vascularity, and tendon impingement may precede rupture. Although nonsurgical management is an option, healthy, active persons with distal biceps tendon ruptures benefit from early surgical repair, gaining improved strength in forearm supination and, to a lesser degree, elbow flexion. Biomechanical studies have tested the strength and displacement of various repairs; the suspensory cortical button technique exhibits maximum peak load to failure in vitro, and suture anchor and interosseous screw techniques yield the least displacement. Surgical complications include sensory and motor neurapraxia, infection, and heterotopic ossification. Current trends in postoperative rehabilitation include an early return to motion and to activities of daily living.

  4. Fractures of the distal phalanx in the horse

    International Nuclear Information System (INIS)

    Yovich, J.V.

    1989-01-01

    Fractures of the distal phalanx are an important cause of lameness referable to the foot. Depending on the fracture configuration and articular involvement, conservative or surgical treatment may be required. Fractures of the distal phalanx have been divided into six categories based on fracture configuration. Discussion of clinical features, management, and prognosis for horses with distal phalangeal fractures is presented for each fracture type

  5. Carpal alignment in distal radial fractures

    Directory of Open Access Journals (Sweden)

    Jain Pankaj

    2002-05-01

    Full Text Available Abstract Background Carpal malalignment following the malunited distal radial fracture is described to develop as an adaptation to realign the hand to the malunion. It worsens gradually after healing of the fracture due to continued loading of the wrist. It is also reported to develop during the immobilization itself rather than after fracture healing. The present work was aimed to study the natural course and the quantitative assessment of such adaptive carpal realignment following distal radial fracture. Methods In a prospective study, 118 distal radial fractures treated with different modalities were followed-up with serial radiographs for a year for assessment of various radiological parameters. Results Two patterns of carpal malalignment were identified depending upon the effective radio-lunate flexion (ERLF measured on pre-reduction radiographs. The midcarpal malalignment was seen in 98 radial fractures (83% with the lunate following the dorsiflexed fracture fragment and a measured ERLF of less than 25°. The second pattern of radio-carpal malalignment showed the fracture fragment to dorsiflex without taking the lunate with a measured ERLF of more than 25°. The scaphoid did not follow the fracture fragment in both the patterns of malalignment. Conclusion It is better to assess distal radial fractures for any wrist ligamentous injury on the post-reduction film with the restored radial anatomy than on the pre-reduction film since most carpal malalignments get corrected with the reduction of the fracture. Similar carpal malalignment reappear with the redisplacement of the fracture as seen in pre-reduction radiographs and develops during the immobilization rather than as a later compensatory mechanism for the malunion.

  6. Dermoscopic features of distal lateral subungual onychomycosis

    Directory of Open Access Journals (Sweden)

    Thansiha Nargis

    2018-01-01

    Full Text Available Background: Onychomycosis is a very common disease and accounts for upto 50% of the diseases affecting the nail apparatus. Diagnosis of onychomycosis is usually confirmed with the help of a potassium hydroxide (KOH mount and fungal culture. Onychoscopy can be a handy and additional tool for the diagnosis. Aims and Objectives: To determine the dermoscopic findings in distal lateral subungual onychomycosis (DLSO. Materials and Methods: A prospective study of 60 nails with a clinical and mycological diagnosis (KOH with Chicago sky blue positive of DLSO. Dermoscopic examination was performed using a Heine delta 20 plus dermatoscope and the features were recorded. Results: Longitudinal striae and jagged proximal edges seen in all 60 (100% patients. Intermittent spiked pattern was seen in 47 nails (78.3%. Chromonychia and distal irregular termination were noticed in 23 (38.3% and 7 (11.7% nails, respectively. Conclusions: Onychoscopy can be used as an important diagnostic tool while evaluating nail disease, especially in DLSO. Limitations: Small study sample and lack of comparison with other nail diseases that manifests with distal onycholysis.

  7. Miastenia grave distal: relato de caso

    Directory of Open Access Journals (Sweden)

    Scola Rosana Herminia

    2003-01-01

    Full Text Available Relatamos o caso de uma mulher de 30 anos com quadro de fraqueza muscular nos membros inferiores com predomínio distal com início há 7 anos. Na evolução apresentou fraqueza muscular nos membros superiores. O exame físico mostrava nervos cranianos sem alterações, hipotrofia bilateral de quadriceps e interósseos dos pés, redução da força muscular mais intensa em tibiais anteriores e interósseos dorsais dos pés e reflexos tendinosos globalmente hipoativos. Foi realizado teste de estimulação repetitiva que mostrou decremento maior que 10% no nervo fibular e ulnar. A dosagem de anticorpos anti-receptor de acetilcolina foi positiva. Tomografia computadorizada de tórax foi normal. Dosagem de hormônios tireoidianos mostrou evidências laboratoriais de hipertireoidismo, porém sem manifestações clínicas. Foi iniciado tratamento com piridostigmina havendo melhora importante do quadro clínico. A fraqueza distal é um sintoma inicial raro na miastenia grave (MG. Contudo, a MG deve entrar no diagnóstico diferencial de doenças que cursam com fraqueza muscular distal de membros superiores ou inferiores.

  8. Management and treatment of distal ulcerative colitis

    Directory of Open Access Journals (Sweden)

    Andrea Calafiore

    2013-12-01

    Full Text Available Ulcerative colitis (UC is a chronic inflammatory condition that is confined to the colonic mucosa. Its main symptoms include diarrhea, rectal bleeding and abdominal pain. Approximately two-thirds of UC patients have disease confined distal to the splenic flexure, which can be treated effectively with topical therapy. This means the active drug can be delivered directly to the site of inflammation, limiting the systemic absorption and potential side effects. Topical treatment with aminosalicylates is the most effective approach in the treatment of these forms, provided that the formulation reaches the upper margin of the disease. Given this, the suppository formulation is the treatment of choice for proctitis and distal sigmoiditis. Thanks to their proximal spread, enemas, foams and gels represent the treatment of choice for proctosigmoiditis and for distal ulcerative colitis. Oral aminosalicylates are less effective than topical therapies in patients with active disease, while the combination of topical and oral treatment is more effective in patients refractory to topical or oral mono-therapy. Topically administered aminosalicylates play an important role in the maintenance of remission, but the long-term adhesion to therapy is poor. For this reason, the oral formulation is the first-line therapy in the maintenance of remission. Refractory patients can be treated with topical steroids or systemic steroids and TNF-alpha inhibitors in severe forms.

  9. X-ray devices in Germany: regular check-ups result in improved protection; Roentgeneinrichtungen in der Bundesrepublik: TUeV-Pruefungen fuehren zu besserem Strahlenschutz

    Energy Technology Data Exchange (ETDEWEB)

    Neef, N. [Rheinisch-Westfaelischer Technischer Ueberwachungs-Verein Anlagentechnik GmbH, Essen (Germany); Staudt, H. [Verband der Technischen Ueberwachungs-Vereine e.V. (VdTUeV), Essen (Germany)

    2000-07-01

    In the years 1996 to 1998 ca. 33.000 X-ray devices habe been examined by the Technische Ueberwachungs-Vereine according to the German Roentgenverordnung, where about 1/3 were new or modified devices and 2/3 devices in use for at least 5 years. 90% of the examined devices were human medical devices, of which 2/3 were in the dental branch. While the number of devices with faults was in the order of 10% of the tested non-medical X-ray-instruments it grew to 61% of the old medical devices. The reasons are: Higher requirements for the medical devices, which were further enhanced 1994 by updated regulatories, and inclusion of films, cassettes and film viewers into the examinations. The examinations of X-ray devices have been proved as necessary to minimze the radiation exposure to the personnel and the patients with sufficient quality of the pictures and to take the state of the art to the old devices. (orig.) [German] In den Jahren 1996 bis 1998 wurden von den Technischen Uebergangs-Vereinen ca. 33.000 Roentgeneinrichtungen nach der Roentgenverordnung (RoeV) geprueft, davon waren etwa ein Drittel Pruefungen nach den Paragraphen 3 und 4, der Rest nach Paragraph 18 Nr. 4 der RoeV. Ca. 90% der geprueften Geraete waren humanmedizinische Roentgeneinrichtungen, davon ca. 2/3 zahnmedizinische. Waehrend die Anzahl der Geraete mit Maengeln im nichtmedizinischen Bereich bei ca. 10% lag, lag dieser Anteil im humanmedizinischen Bereich wesentlich hoeher, naemlich bei bis zu 61% bei wiederkehrenden Pruefungen. Die Ursachen hierfuer liegen sowohl in den groesseren Anforderungen an die humanmedizinischen Geraete, die mit der Aenderung der Sachverstaendigenrichtlinie 1994 noch verschaerft wurden, als auch in der 1994 erfolgten Einbeziehung der Filme, Film-Foliensysteme und Filmbetrachtungsgeraete in die Pruefung. Die Pruefungen an Roentgeneinrichtungen haben sich als notwendig erwiesen, um die Strahlenexposition des Personals und der Patienten bei der fuer die Diagnose erforderlichen

  10. Intrauterine Devices

    Science.gov (United States)

    S HARE W ITH W OMEN INTRAUTERINE DEVICES INTRAUTERINE DEVICES What is An Intrauterine Device? An intrauterine device (IUD) is anything that is placed inside the uterus (womb) to prevent pregnancy. ...

  11. Maxillary molar distalization with the dual-force distalizer supported by mini-implants: a clinical study.

    Science.gov (United States)

    Oberti, Giovanni; Villegas, Carlos; Ealo, Martha; Palacio, John Camilo; Baccetti, Tiziano

    2009-03-01

    The objective of this prospective study was to describe the clinical effects of a bone-supported molar distalizing appliance, the dual-force distalizer. The study group included 16 patients (mean age, 14.3 years) with Class II molar relationships. Study models and lateral cephalograms were taken before and after the distalizing movement to record significant dental and skeletal changes (Wilcoxon test). The average distalization time was 5 months, with a movement rate of 1.2 mm per month; the distalization amounts were 5.9 +/- 1.72 mm at the crown level and 4.4 +/- 1.41 mm at the furcation level. The average molar inclination was 5.6 degrees +/- 3.7 degrees ; this was less than the amount of inclination generated by bone-supported appliances that use single distalizing forces. The correlation between inclination and distalization was not significant, indicating predominantly bodily movement. The teeth anterior to the first molar moved distally also; the second premolars distalized an average of 4.26 mm, and the incisors retruded by 0.53 mm. The dual-force distalizer is a valid alternative distalizing appliance that generates controlled molar distalization with a good rate of movement and no loss of anchorage.

  12. An innovative technique to distalize maxillary molar using microimplant supported rapid molar distalizer

    Directory of Open Access Journals (Sweden)

    Meenu Goel

    2013-01-01

    Full Text Available Introduction: In recent years, enhancements in implants have made their use possible as a mode of absolute anchorage in orthodontic patients. In this paper, the authors have introduced an innovative technique to unilaterally distalize the upper left 1 st molar to obtain an ideal Class I molar relationship from a Class II existing molar relationship with an indigenous designed distalizer. Clinical Innovation: For effective unilateral diatalization of molar, a novel cantilever sliding jig assembly was utilized with coil spring supported by a buccally placed single micro implant. The results showed 3 mm of bodily distalization with 1 mm of intrusion and 2° of distal tipping of upper left 1 st molar in 1.5 months. Discussion: This appliance is relatively easy to insert, well-tolerated, and requires minimal patient cooperation compared to other present techniques of molar distalization. Moreover, it is particularly useful in cases that are Class II on one side and Class I on the other, with a minor midline discrepancy and nominal overjet. Patient acceptance level was reported to be within patients physiological and comfort limits.

  13. Robotic distal pancreatectomy versus conventional laparoscopic distal pancreatectomy: a comparative study for short-term outcomes.

    Science.gov (United States)

    Lai, Eric C H; Tang, Chung Ngai

    2015-09-01

    Robotic system has been increasingly used in pancreatectomy. However, the effectiveness of this method remains uncertain. This study compared the surgical outcomes between robot-assisted laparoscopic distal pancreatectomy and conventional laparoscopic distal pancreatectomy. During a 15-year period, 35 patients underwent minimally invasive approach of distal pancreatectomy in our center. Seventeen of these patients had robot-assisted laparoscopic approach, and the remaining 18 had conventional laparoscopic approach. Their operative parameters and perioperative outcomes were analyzed retrospectively in a prospective database. The mean operating time in the robotic group (221.4 min) was significantly longer than that in the laparoscopic group (173.6 min) (P = 0.026). Both robotic and conventional laparoscopic groups presented no significant difference in spleen-preservation rate (52.9% vs. 38.9%) (P = 0.505), operative blood loss (100.3 ml vs. 268.3 ml) (P = 0.29), overall morbidity rate (47.1% vs. 38.9%) (P = 0.73), and post-operative hospital stay (11.4 days vs. 14.2 days) (P = 0.46). Both groups also showed no perioperative mortality. Similar outcomes were observed in robotic distal pancreatectomy and conventional laparoscopic approach. However, robotic approach tended to have the advantages of less blood loss and shorter hospital stay. Further studies are necessary to determine the clinical position of robotic distal pancreatectomy.

  14. Topographic matching of distal radius and proximal fibula articular surface for distal radius osteoarticular reconstruction.

    Science.gov (United States)

    Zhang, H; Chen, S; Wang, Z; Guo, Y; Liu, B; Tong, D

    2016-07-01

    During osteoarticular reconstruction of the distal radius with the proximal fibula, congruity between the two articular surfaces is an important factor in determining the quality of the outcome. In this study, a three-dimensional model and a coordinate transformation algorithm were developed on computed tomography scanning. Articular surface matching was performed and parameters for the optimal position were determined quantitatively. The mean radii of best-fit spheres of the articular surfaces of the distal radius and proximal fibula were compared quantitatively. The radial inclination and volar tilt following reconstruction by an ipsilateral fibula graft, rather than the contralateral, best resembles the values of the native distal radius. Additionally, the ipsilateral fibula graft reconstructed a larger proportion of the distal radius articular surface than did the contralateral. The ipsilateral proximal fibula graft provides a better match for the reconstruction of the distal radius articular surface than the contralateral, and the optimal position for graft placement is quantitatively determined. © The Author(s) 2015.

  15. Distal renal tubular acidosis in recurrent renal stone formers

    DEFF Research Database (Denmark)

    Osther, P J; Hansen, A B; Røhl, H F

    1989-01-01

    (1.1%) had complete distal renal tubular acidosis and 14 (15.5%) incomplete distal renal tubular acidosis. Our results confirm that distal renal tubular acidification defects are associated with a more severe form of stone disease and make distal renal tubular acidosis one of the most frequent...... metabolic disturbances in renal stone formers. Distal renal tubular acidosis (dRTA) was relatively more common in female stone formers and most often found in patients with bilateral stone disease (36%). Since prophylactic treatment in renal stone formers with renal acidification defects is available...

  16. Fractures of the distal radius. Current concepts for treatment.

    Science.gov (United States)

    Broos, P L; Fourneau, I A; Stoffelen, D V

    2001-06-01

    The authors review the treatment of fractures of the distal radius, based on their experience and from data in the literature. The choice of a treatment for any given fracture must take into account first of all the stability of the fracture. The best results are achieved in stable fractures. Only minimally displaced distal radius fractures can be treated functionally. However, a plaster cast for one week is indicated for the comfort of the patient. In displaced but stable fractures both closed reduction and percutaneous fixation are indicated. In case of closed reduction, the plaster cast should be applied for 5 to 6 weeks with an above-elbow cast for 3 weeks. Percutaneous fixation gives the best results in extraarticular fractures in younger patients. Because of its simplicity however, it should not be ignored in the elderly osteoporotic patients. In the authors' experience, both techniques were only used for extraarticular fractures. Good and excellent results were found in the closed reduction and plaster cast group in 74% of the patients; the Kapandji technique gave 75% good and excellent results. These results are in line with other findings which show that, for simple fracture types, the Kapandji technique and closed reduction seem to give similar results. External fixation is widely used for intra-articular comminuted fractures. Dynamic external fixation does not show any advantage over static devices. Additional K-wires or bone grafting may be necessary. External fixation gives superior results to plate and screw fixation. Internal fixation should be reserved for fractures with ventral comminution or severe displacement with unacceptable reduction by closed or minimally invasive techniques.

  17. [Retrograde intramedullary nailing for periprosthetic fractures of the distal femur].

    Science.gov (United States)

    Biber, R; Bail, H J

    2014-10-01

    Intramedullary stabilization of periprosthetic distal femoral fractures by interlocking nailing. Closed reduction by retrograde nail can be combined with the use of transmedullary support screws (TMS principle of Stedtfeld). Supracondylar fractures above stable knee arthroplasty (Rorabeck types I and II), femoral shaft fractures ipsilateral of stable hip and/or knee arthroplasty, contraindications for antegrade nailing Closed box design of femoral implant, intercondylar distance of the femoral component smaller than nail diameter, more than 40° flexion deficit of the knee, inability to place two bicortical distal interlocking screws. Relative contraindication: insufficient overlap with proximal implants Supine position and knee flexion of approximately 45°. Fluoroscopy should be possible between the knee and hip. Longitudinal skin incision into the pre-existing scar over the patellar tendon which is then split. The nail entry point is located in the intercondylar groove at the deepest point of Blumensaat's line, often predetermined by the femoral arthroplasty component. Reaming is rarely necessary. Transmedullary support screws may correct axial malalignment during nail insertion. Static interlocking in a direction from lateral to medial by the aiming device. Insertion of locking cap. Retrograde nailing normally allows full weight bearing. Range of motion does not need to be restricted. Out of 101 fractures treated between 2000 and 2013 with a Targon RF nail (Aesculap, Tuttlingen, Germany) 10 were periprosthetic, all were classified as Rorabeck type II and of these 6 fractures were metaphyseal and 4 were diaphyseal. In four cases proximal implants were present. The mean operative time for periprosthetic fracture fixation did not significantly differ from that for normal retrograde femoral nailing. There were no postoperative infections, fixation failures or delayed unions. There was one revision for secondary correction of maltorsion.

  18. Development of a colonoscopy add-on device for improvement of the intubation process

    Directory of Open Access Journals (Sweden)

    Litten JD

    2011-12-01

    Full Text Available Jonathan D Litten1, JungHun Choi2, David Drozek31Department of Mechanical Engineering; 2Department of Mechanical Engineering and Biomedical Engineering Program; 3College of Osteopathic Medicine, Department of Specialty Medicine, Ohio University, Athens, OH, USAAbstract: A colonoscopy add-on device has been developed to reduce intubation time without modification of the current colonoscope and peripheral devices. One of the main purposes of the system is to minimize trauma caused by the distal tip of the colonoscope. The detachable sensory fixture at the end of the distal tip measures the distance between the distal tip and the colon wall in three directions, and the actuation system attached at the base of the colonoscope controls the distal tip by rotating two dial knobs. The device controls the distal tip to minimize contact between the distal tip and the colon wall, and the distal tip ideally points out the next possible lumen. A compatibility test of the infrared sensory system was carried out, and the design of the actuation system was accomplished. The system is integrated and controlled by a microprocessor. The device was tested in a silicon colon and porcine intestine. The results showed that a colonoscopist successfully reached the cecum with the aid of the colonoscopy add-on device without significant contact between the colon wall and the distal tip. The colonoscopy aid device was very helpful for the novice colonoscopist.Keywords: colonoscope, infrared sensors, intubation, trauma, colonoscopy training model

  19. following Wide Resection of Giant Cell Tumour of Distal Ulna

    Directory of Open Access Journals (Sweden)

    Elango Mariappan

    2013-01-01

    Full Text Available Giant cell tumour of the bone (GCT is a rare locally aggressive primary bone tumour with an incidence of 3% to 5% of all primary bone tumours. The most common location for this tumour is the long bone metaepiphysis especially of the distal femur, proximal tibia, distal radius, and the proximal humerus. Involvement of distal ulna is rare accounting for 0.45% to 3.2%. Considering local aggressive nature and high recurrence, wide resection is the treatment recommended. Instability of ulnar stump and ulnar translation of the carpals are known complications following resection of distal ulna. To overcome these problems, we attempted a newer technique of distal ulna reconstruction using proximal fibula and TFCC reconstruction using palmaris longus tendon following wide resection of giant cell tumour of distal ulna in a 44-year-old male. This technique of distal radioulnar joint reconstruction has excellent functional results with no evidence of recurrence after one-year followup.

  20. Illumination of Double Snapback Mechanism in High Voltage Operating Grounded Gate Extended Drain N-type Metal-Oxide-Semiconductor Field Effects Transistor Electro-Static Discharge Protection Devices

    Science.gov (United States)

    Kim, Kil Ho; Jung, Yong Icc; Shim, Jin Seop; So, Hyung Tae; Lee, Ji Hyun; Hwang, Lee Yeun; Park, Jin Won

    2004-10-01

    High current behaviors of the ‘grounded gate extended drain N-type metal-oxide-semiconductor field effects transistor’ (GG_EDNMOS) electro-static discharge (ESD) protection devices are analyzed. Both the transmission line pulse (TLP) data and the thermal incorporated 2-dimensional simulation analyses demonstrate a characteristic double snapback phenomenon after triggering of biploar junction transistor (BJT) operation. This implies the co-existence of two different on-states in high current region. The 2nd on-state, characterized by extremely low snapback holding voltage and low on-resistance, seems to be responsible for the vulnerability of the device under ESD stress. Simulation based contour analyses reveal that combination of BJT operation and deep electron channeling induced by high electron injection gives rise to the 2nd on-state. Thus, the deep electron channel formation needs to be prevented in order to realize stable and robust ESD protection performance. Further studies reveal that the N-drift implant dose, among various process parameters, is a critical factor to determine the formation of deep electron channeling and consequential occurrence of the 2nd on-state. Based on our analyses, general methodology to avoid the double snapback and to realize stable ESD protection is to be discussed.

  1. The role of hand-assisted laparoscopic distal gastrectomy for distal gastric cancer.

    Science.gov (United States)

    Kim, Y W; Bae, J M; Lee, J H; Ryu, K W; Choi, I J; Kim, C G; Lee, J S; Rho, J Y

    2005-01-01

    The aim of this study was to evaluate the role of hand-assisted distal gastrectomy (HALDG) for gastric cancer. This study prospectively enrolled 16 patients who underwent HALDG for early gastric cancer and matched them individually by sex, age, and body mass index to patients who underwent laparoscopically assisted distal gastrectomy (LADG) or open distal gastrectomy (ODG). Surgical outcomes were compared among the surgical methods. The mean operating time was the longest for the HALDG group, whereas wound size of the HALDG group was intermediate between that of the LADG and the ODG groups. The other surgical outcomes, such as the number of harvested lymph nodes, were not different among the groups. According to the findings, HALDG may not be as beneficial for patients with early gastric cancer as has been previously suggested. However, because of easier hand-eye coordination, HALDG may be an excellent bridge learning technique as a surgeon gains experience in laparoscopic gastrectomy.

  2. Hands-on robotic distal interlocking in intramedullary nail fixation of femoral shaft fractures.

    Science.gov (United States)

    Oszwald, Markus; Westphal, Ralf; Stier, Rebecca; Gaulke, Ralph; Calafi, Afshin; Müller, Christian W; Wahl, Friedrich; Krettek, Christian; Gösling, Thomas

    2010-01-01

    Intramedullary nailing has become the gold standard in the treatment of femoral shaft fractures. This procedure involves the placement of distal interlocking bolts using the freehand technique. Accurate placement of distal interlocks can be a challenging task, especially in inexperienced hands. Misplacement of distal interlocking bolts can lead to iatrogenic fracture, instability of the bone-implant construct, or even malalignment of the extremity. Repeated drilling attempts increase radiation exposure and can cause additional bony and soft tissue trauma. We hypothesize that robot-guided placement of distal interlocks is more accurate, precise, and efficient than the freehand technique. A custom-designed drill guide was mounted onto the arm of an industrial robot. We developed a special device to secure a generic block (Synbone, Malans, Switzerland) into which an intramedullary nail could be inserted in a standardized way. A metric scale allowed later measurements of the drillings. Digital images were taken from each side of the block for analysis of the drilling trajectories. The fluoroscope was adjusted to obtain perfect circles of the distal interlocking holes. The number of images necessary to achieve this was recorded. The axis was recognized automatically by using the differences in contrast between the matrix of the generic bone and the implant (intramedullary nail). The drill trajectories were then computed. The robot with the mounted drill-guide automatically moved onto the calculated trajectory. The surgeon then executed the drilling. We performed 40 robot assisted drillings in generic blocks. Freehand drilling served as our control group. Analysis of the digital images revealed a mean deviation of 0.94 mm and 2.7° off the ideal trajectory using robotic assistance. In 100% of the cases (n = 40), the distal locking hole was hit. A mean of 8.8 images was acquired. After manual drilling, 92.5% of the distal interlocks were hit. A mean deviation of 3.66 mm

  3. OUTCOME OF FRACTURE OF INTRAARTICULAR DISTAL FEMUR TREATED WITH DISTAL FEMUR LOCKING COMPRESSION PLATE

    Directory of Open Access Journals (Sweden)

    Swapna Pran Saikia

    2017-10-01

    Full Text Available BACKGROUND The most challenging fractures faced by orthopaedic surgeons are the distal fractures of femur, especially the intraarticular distal femoral fractures. These fractures have been classified according to Orthopaedic Trauma Association (OTA 33-C3. Distal femoral fractures account to 4-7% of all femoral fractures and are less common compared to hip fractures. The aim of the study is to study the functional outcome of fracture of intraarticular distal femur treated with distal femur locking compression plate. MATERIALS AND METHODS This study is a prospective study, which comprised of 30 patients of intraarticular distal femur fracture AO classification 33-C3 who were treated by locking compression plate at Jorhat Medical College and Hospital, Jorhat, Assam. This study was conducted during February 2015 to April 2017. The functional outcome was studied using Neer’s score, outcome of radiology and complication with fracture fixation using LCP. RESULTS Out of 30 patients, 22 were males (73.3% and 8 were females (26.7%. 18 patients had fracture right hand side and 12 patients had left-handed fractures. A 19 years old was the youngest patient and 72 years was the oldest patient. About 70% patients had sustained road traffic accidents and 10% had sustained fall from a height. Four days was the average trauma to operative interval, 22 patients were operated extensile lateral approach and 8 patients were operated by swashbuckler approach. 12 weeks was the average weightbearing duration, 21 weeks was average time for fracture healing. 10 patients had C1 (33.3%, 12 patients had C2 (40% and 8 patients had C3 (26.7% type of fracture according to AO classification. Among 30 patients, 13 patients have shown excellent results, 7 patients have good results, 5 fair results and 5 poor results. Primary bone grafting was done in 4 patients for severely comminuted type C3 fracture. Secondary bone grafting was done in 2 patients who had delayed union at 4

  4. Distal anastomotic vein adjunct usage in infrainguinal prosthetic bypasses.

    Science.gov (United States)

    McPhee, James T; Goodney, Philip P; Schanzer, Andres; Shaykevich, Shimon; Belkin, Michael; Menard, Matthew T

    2013-04-01

    ). The DVA group had a higher rate of completion angiogram performed (55.7% vs 37.5%; P =.002) and were more likely to be discharged on coumadin (53.4% vs 37.1%; P =.01). By multivariable analysis, use of a distal DVA was protective against MALEs (hazard ratio, 0.36; 95% confidence interval, 0.14-0.90; P = .03). This contemporary multi-institutional propensity-matched study demonstrates that patients that receive distal anastomotic vein adjuncts as part of infrainguinal prosthetic bypass operations in general have more extreme comorbidities and more technically challenging operations based on level of target vessel and prior bypass attempts. After propensity-matched analysis, the use of a DVA may protect against MALEs in prosthetic bypass surgery and should be considered when feasible. Copyright © 2013 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.

  5. Repair of distal biceps brachii tendon ruptures.

    Science.gov (United States)

    Bell, R H; Wiley, W B; Noble, J S; Kuczynski, D J

    2000-01-01

    This study consisted of 26 male patients with distal biceps tendon ruptures, 2 of whom had bilateral injuries, making the total number of ruptures 28. The average age at injury was 45 years. The treatment groups were the following: 3 were treated without surgery, 4 were repaired with brachialis tenodesis, and 21 were reattached to the radial tuberosity by the 2-incision Boyd-Anderson approach. Patients underwent follow-up a minimum of 14 months after surgery, with the average being 43 months. Outcome was evaluated based on the physical examination, isokinetic testing of strength and endurance of flexion and supination, and radiographic analysis.

  6. Periosteal osteoblastoma of the distal femur

    Energy Technology Data Exchange (ETDEWEB)

    Nakatani, Tetsuya; Yamamoto, Tetsuji; Akisue, Toshihiro; Marui, Takashi; Hitora, Toshiaki; Kawamoto, Teruya; Nagira, Keiko; Yoshiya, Shinichi; Kurosaka, Masahiro [Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe (Japan); Fujita, Ikuo; Matsumoto, Keiji [Department of Orthopaedic Surgery, Hyogo Medical Center for Adults, Akashi, Hyogo (Japan)

    2004-02-01

    Osteoblastomas located on the surface of the cortical bone, so-called periosteal osteoblastomas, are extremely rare. We report on a case of periosteal osteoblastoma arising from the posterior surface of the right distal femur in a 17-year-old man. Roentgenographic, computed tomographic, magnetic resonance imaging, and histologic features of the case are presented. Periosteal osteoblastoma should be radiologically and histologically differentiated from myositis ossificans, avulsive cortical irregularity syndrome, osteoid osteoma, parosteal osteosarcoma, periosteal osteosarcoma, and high-grade surface osteosarcoma. Although periosteal osteoblastoma is rare, this tumor should be included in the differential diagnosis of surface-type bone tumors. (orig.)

  7. Periosteal osteoblastoma of the distal femur

    International Nuclear Information System (INIS)

    Nakatani, Tetsuya; Yamamoto, Tetsuji; Akisue, Toshihiro; Marui, Takashi; Hitora, Toshiaki; Kawamoto, Teruya; Nagira, Keiko; Yoshiya, Shinichi; Kurosaka, Masahiro; Fujita, Ikuo; Matsumoto, Keiji

    2004-01-01

    Osteoblastomas located on the surface of the cortical bone, so-called periosteal osteoblastomas, are extremely rare. We report on a case of periosteal osteoblastoma arising from the posterior surface of the right distal femur in a 17-year-old man. Roentgenographic, computed tomographic, magnetic resonance imaging, and histologic features of the case are presented. Periosteal osteoblastoma should be radiologically and histologically differentiated from myositis ossificans, avulsive cortical irregularity syndrome, osteoid osteoma, parosteal osteosarcoma, periosteal osteosarcoma, and high-grade surface osteosarcoma. Although periosteal osteoblastoma is rare, this tumor should be included in the differential diagnosis of surface-type bone tumors. (orig.)

  8. Distal radius fracture after proximal row carpectomy

    OpenAIRE

    Igeta, Yuka; Naito, Kiyohito; Sugiyama, Yoichi; Obata, Hiroyuki; Aritomi, Kentaro; Kaneko, Kazuo; Obayashi, Osamu

    2015-01-01

    Introduction: We encountered a patient with distal radius fracture (DRF) after proximal row carpectomy (PRC). The mechanism of the DRF after PRC is discussed in this report. Presentation of case: The patient was a 73-year-old female who had undergone PRC due to Kienböck disease before. The wrist range of motion was: 45° on dorsiflexion and 20° on flexion. DRF has occurred at 3 years after PRC. The fracture type was extra-articular fracture. Osteosynthesis was performed using a volar lockin...

  9. The anatomy and physiology of the suspensory apparatus of the distal phalanx.

    Science.gov (United States)

    Pollitt, Christopher C

    2010-04-01

    The equine hoof capsule protects the softer, more sensitive, structures within. Failure of the connection between hoof and bone (suspensory apparatus of the distal phalanx or SADP) results in the crippling lameness of laminitis. Active basal cell proliferation occurs principally in tubular hoof and proximal and distal lamellae. The remaining lamellae are virtually non-proliferative and the hoof wall moves past the stationary distal phalanx, by controlled activation and inhibition of constituent proteases. The lamellar corium derives most of its blood supply from the branches of the terminal arch which perforate the distal phalanx. Valveless veins within the foot can be exploited clinically for retrograde venous therapy or contrast radiography (venography). The basement membrane (BM) forms the interface between the lamellar epidermis and the adjacent dermis and the plasma membrane of each lamellar basal cell is attached to the BM by numerous electron dense adhesion plaques or hemidesmosomes the ultimate attachment unit of the SADP. Laminitis destroys and dislocates the BM and its components and without an intact, functional BM, the structure and function of the lamellar epidermis is pathologically compromised. Transcription and activation of constituent proteases occurs in normal hoof lamellae but in increased amounts during laminitis. Copyright 2010 Elsevier Inc. All rights reserved.

  10. Dermal pocketing following distal finger replantation.

    Science.gov (United States)

    Puhaindran, Mark E; Paavilainen, Pasi; Tan, David M K; Peng, Yeong Pin; Lim, Aymeric Y T

    2010-08-01

    Replantation is an ideal technique for reconstruction following fingertip amputation as it provides 'like for like' total reconstruction of the nail complex, bone pulp tissue and skin with no donor-site morbidity. However, fingertips are often not replanted because veins cannot be found or are thought to be too small to repair. Attempts at 'cap-plasty' or pocketing of replanted tips with and without microvascular anastomosis have been done in the past with varying degrees of success. We prospectively followed up a group of patients who underwent digital replantation and dermal pocketing in the palm to evaluate the outcome of this procedure. There were 10 patients with 14 amputated digits (two thumbs, five index, four middle, two ring and one little) who underwent dermal pocketing of the amputated digit following replantation. Among the 14 digits that were treated with dermal pocketing, 11 survived completely, one had partial atrophy and two were completely lost. Complications encountered included finger stiffness (two patients) and infection of the replanted fingertip with osteomyelitis of the distal phalanx (one patient). We believe that this technique can help increase the chance of survival for distal replantation with an acceptable salvage rate of 85% in our series. Copyright 2009 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.

  11. Maxillary molar distalization with first class appliance.

    Science.gov (United States)

    Ramesh, Namitha; Palukunnu, Biswas; Ravindran, Nidhi; Nair, Preeti P

    2014-02-27

    Non-extraction treatment has gained popularity for corrections of mild-to-moderate class II malocclusion over the past few decades. The distalization of maxillary molars is of significant value for treatment of cases with minimal arch discrepancy and mild class II molar relation associated with a normal mandibular arch and acceptable profile. This paper describes our experience with a 16-year-old female patient who reported with irregularly placed upper front teeth and unpleasant smile. The patient was diagnosed to have angles class II malocclusion with moderate maxillary anterior crowding, deep bite of 4 mm on a skeletal class II base with an orthognathic maxilla and retrognathic mandible and normal growth pattern. She presented an ideal profile and so molar distalization was planned with the first-class appliance. Molars were distalised by 8 mm on the right and left quadrants and class I molar relation achieved within 4 months. The space gained was utilised effectively to align the arch and establish a class I molar and canine relation.

  12. Biotin absorption by distal rat intestine

    International Nuclear Information System (INIS)

    Bowman, B.B.; Rosenberg, I.H.

    1987-01-01

    We used the in vivo intestinal loop approach, with short (10-min) and long (3-h) incubations, to examine biotin absorption in proximal jejunum, distal ileum, cecum and proximal colon. In short-term studies, luminal biotin disappearance from rat ileum was about half that observed in the jejunum, whereas absorption by proximal colon was about 12% of that in the jejunum. In 3-h closed-loop studies, the absorption of 1.0 microM biotin varied regionally. Biotin absorption was nearly complete in the small intestine after 3 h; however, only about 15% of the dose had been absorbed in the cecum and 27% in the proximal colon after 3 h. Independent of site of administration, the major fraction of absorbed biotin was recovered in the liver; measurable amounts of radioactive biotin were also present in kidney and plasma. The results support the potential nutritional significance for the rat of biotin synthesized by bacteria in the distal intestine, by demonstrating directly an absorptive capability of mammalian large bowel for this vitamin

  13. Distal radius fracture after proximal row carpectomy.

    Science.gov (United States)

    Igeta, Yuka; Naito, Kiyohito; Sugiyama, Yoichi; Obata, Hiroyuki; Aritomi, Kentaro; Kaneko, Kazuo; Obayashi, Osamu

    2015-01-01

    We encountered a patient with distal radius fracture (DRF) after proximal row carpectomy (PRC). The mechanism of the DRF after PRC is discussed in this report. The patient was a 73-year-old female who had undergone PRC due to Kienböck disease before. The wrist range of motion was: 45° on dorsiflexion and 20° on flexion. DRF has occurred at 3 years after PRC. The fracture type was extra-articular fracture. Osteosynthesis was performed using a volar locking plate. No postoperative complication developed, the Mayo score was excellent at 6 months after surgery, and the daily living activity level recovered to that before injury. Since the wrist range of motion decreased and the lunate fitted into the joint surface after PRC, making the forearm join with the hand like a single structure, pressure may have been loaded on the weak distal end of the radius from the dorsal side, causing volar displacement and fracture. The pressure distribution and range of motion of the radiocarpal joint after PRC are different from those of a normal joint, and the mechanism of fracture also changes due to PRC. Copyright © 2015 The Authors. Published by Elsevier Ltd.. All rights reserved.

  14. [Carpal malalignment following distal radius fracture].

    Science.gov (United States)

    Coulet, B; Gauci, M-O; Lazerges, C; Chammas, M

    2016-12-01

    Adaptive carpal malalignment is the consequence of malunion of the distal radius. Since the radial metaphysis and capitate have to be aligned, any disorientation of the radial epiphysis will force the proximal carpal row to adapt, as it is the only mobile element. There are two types of adaptation depending where the compensative occurs: (1) midcarpal - leading to flexion between the lunate and capitate, with the lunate maintaining a normal relationship with the radial epiphysis axis; (2) radiocarpal - combining flexion and dorsal displacement of the lunate relative to the axis of the radial epiphysis, with the midcarpal joint remaining aligned. Clinically, adaptive carpal malalignment is not the first reason for consultation in cases of distal radius malunion. It occurs in cases of moderate deformity with preserved pronation-supination in a young patient who has good mobility. It generates dorsal pain that may be associated with a snapping sensation. The diagnosis requires strict lateral X-ray views. Over time, the wrist becomes stiff but analgesic and is often well tolerated functionally. This type of deformity has not been shown to lead to osteoarthritis. Osteotomy to correct the malunion is the only way to treat adaptive carpal malalignment in active young patients who have a mobile but painful wrist. Copyright © 2016 SFCM. Published by Elsevier Masson SAS. All rights reserved.

  15. Osteoid osteoma of the distal clavicle

    Directory of Open Access Journals (Sweden)

    Bernardo Barcellos Terra

    Full Text Available ABSTRACT The osteoid osteoma is a bone tumor that accounts for 10% of benign tumors. It was described in 1935 by Jaffe, as a tumor that affects the young adult population, with a predominance of males. This study aims to present a case of late diagnosis of a patient with osteoid osteoma of the distal clavicle region. Female patient, 44 years old, non-professional volleyball player, reported pain in the anterior and superior region of the shoulder girdle, specifically in the acromioclavicular joint, which worsened at night and had been treated for nine months as tendinitis of the rotator cuff and acromioclavicular joint arthritis. After confirming the diagnosis, the patient underwent open surgery with resection of the distal clavicle. At two years of follow-up, the patient presents without local pain. In the radiographic evaluation, coracoclavicular distance is preserved and there are no signs of recurrence. Tumors of the shoulder girdle are rare and are often diagnosed late. A high degree of suspicion for the diagnosis of tumors of the shoulder girdle is needed in order to avoid late diagnosis.

  16. Clinical profile of distal renal tubular acidosis

    Directory of Open Access Journals (Sweden)

    Ratan Jha

    2011-01-01

    Full Text Available To determine the clinical profile and progression of renal dysfunction in distal renal tubular acidosis (dRTA, we retrospectively studied 96 consecutive cases of dRTA diagnosed at our center. Patients with unexplained metabolic bone disease, short stature, hypokalemia, re-current renal stones, chronic obstructive uropathy or any primary autoimmune condition known to cause dRTA were screened. Distal RTA was diagnosed on the basis of systemic metabolic acidosis with urine pH >5.5 and positive urine anion gap. In those patients who had fasting urine pH >5.5 with normal baseline systemic pH and bicarbonate levels (incomplete RTA, acid load test with ammonium chloride was done. A cause of dRTA could be established in 53 (54% patients. Urological defect in children (22/44 and autoimmune disease in adults (11/52 were the commonest causes. Hypokalemic paralysis, proximal muscle weakness and voiding difficulty were the common modes of presentation. Doubling of serum creatinine during the study period was noted in 13 out of 27 patients who had GFR 60 mL/min (P <0.005. In conclusion, urological disorders were the commonest cause of dRTA in children while autoimmune disorders were the commonest asso-ciation in adults. Worse baseline renal function, longer duration of disease and greater frequency of nephrolithiasis/nephrocalcinosis and urological disorders were noted in those who had wor-sening of renal dysfunction during the study period.

  17. Protective effect of blue-light shield eyewear for adults against light pollution from self-luminous devices used at night.

    Science.gov (United States)

    Ayaki, Masahiko; Hattori, Atsuhiko; Maruyama, Yusuke; Nakano, Masaki; Yoshimura, Michitaka; Kitazawa, Momoko; Negishi, Kazuno; Tsubota, Kazuo

    2016-01-01

    We investigated sleep quality and melatonin in 12 adults who wore blue-light shield or control eyewear 2 hours before sleep while using a self-luminous portable device, and assessed visual quality for the two eyewear types. Overnight melatonin secretion was significantly higher after using the blue-light shield (P blue-light shield (P blue-light shield as providing acceptable visual quality.

  18. Evaluation of the Scott Aviation Portable Protective Breathing Device for contaminant leakage as prescribed by FAA Action Notice A-8150.2.

    Science.gov (United States)

    1989-11-01

    Two types of crewmember protective breathing equipment (PBE) were performance tested for compliance with Action Notice A-8150.2 at ground level (- 1,300 feet) and 8,000 feet altitude. PBE 1 was a 'hood with oral-nasal mask,' which used potassium supe...

  19. Comparison of Jones jig molar distalization appliance with extraoral traction.

    Science.gov (United States)

    Haydar, S; Uner, O

    2000-01-01

    In this study, 20 patients were evaluated. Ten were treated with intraoral distalization followed by fixed appliance therapy, and 10 were treated with extra oral traction followed by fixed appliance therapy. Molar relationship correction was achieved in 2.5 months with intraoral distalization and in 10.7 months with extraoral distalization. A significant anterior movement of the anchorage unit (P <.001) was observed with the intraoral distalization and a significant distal drift of premolars was observed in the headgear group (P <.05). Palatal plane was found to tip downward significantly in the headgear group (P <.05). Total outcome of the 2 methods were discussed evaluating the advantages and disadvantages of the 2 distalization methods.

  20. The Supination-Pronation Test for Distal Biceps Tendon Rupture.

    Science.gov (United States)

    Metzman, Louis S; Tivener, Kristin A

    2015-10-01

    Prompt diagnosis of a distal biceps tendon complete rupture increases the ability to perform a primary repair and to restore motion and strength. When examining an acute injury, it is important to isolate the biceps brachii tendon from the lacertus fibrosus and the brachialis because the examiner may mistakenly miss a distal tendon rupture by not isolating supination and pronation. The supination-pronation test can be performed easily in the acute setting and confirms attachment of the biceps tendon distally to the bicipital tuberosity of the radius. If the distal biceps tendon is intact, there is substantial change in the shape of the biceps as the arm is supinated (the biceps moves proximally), then pronated (the biceps moves distally). Clinically, the supination-pronation test has been found to be a reliable, pain-free test that should be incorporated in the physical examination to evaluate patients for distal biceps injury.

  1. Distal renal tubular acidosis in recurrent renal stone formers

    DEFF Research Database (Denmark)

    Osther, P J; Hansen, A B; Røhl, H F

    1989-01-01

    Renal acidification ability was examined in 90 recurrent renal stone formers, using fasting morning urinary pH levels followed by a short ammonium chloride loading test in subjects with pH levels above 6.0. Fifteen patients (16.6%) revealed a distal renal tubular acidification defect: one patient...... (1.1%) had complete distal renal tubular acidosis and 14 (15.5%) incomplete distal renal tubular acidosis. Our results confirm that distal renal tubular acidification defects are associated with a more severe form of stone disease and make distal renal tubular acidosis one of the most frequent...... metabolic disturbances in renal stone formers. Distal renal tubular acidosis (dRTA) was relatively more common in female stone formers and most often found in patients with bilateral stone disease (36%). Since prophylactic treatment in renal stone formers with renal acidification defects is available...

  2. EZ-IO in the ED: an observational, prospective study comparing flow rates with proximal and distal tibia intraosseous access in adults.

    Science.gov (United States)

    Tan, Boon Kiat Kenneth; Chong, Stephanie; Koh, Zhi Xiong; Ong, Marcus Eng Hock

    2012-10-01

    Intraosseous (IO) access is an important alternative to conventional intravenous access when intravenous access is difficult. A nonrandomized, prospective, observational study comparing flow rates with distal and proximal tibia IO access in adults using the EZ-IO-powered drill device. The proximal tibia was the first site of insertion, and a second IO was inserted in the distal tibia if clinically indicated. Intravenous saline infusion was started for all patients, initially without, then with a pressure bag device applied. From September 19, 2008 to November 3, 2010, 22 patients were recruited, with 20 proximal tibial and 22 distal tibia insertions. Two patients had only distal tibia IO insertions. Five distal tibia and 3 proximal tibia insertions had no flow when initiating normal saline infusion without pressure. Upon comparing the mean flow rates without pressure bag, it is significantly faster in the proximal tibia, 4.96 mL/min, compared with distal tibia, 2.07 ml/min, difference of 2.89 ml/min (95% CI 1.20-4.58). Flow rates with pressure bags also revealed a similar result. Flow rates in the proximal tibia were significantly faster, 7.70 ml/min to that of distal tibia, 3.80 ml/min, difference of 3.89 ml/min (95% CI 1.68-6.10). In both proximal and distal tibia groups, the flow rates are also significantly faster with pressure bags compared with without. Flow rates are significantly faster in the proximal tibia compared with the distal tibia. In addition, flow rates with pressure bags are significantly faster than without pressure bags in both groups. Copyright © 2012 Elsevier Inc. All rights reserved.

  3. Antimicrobial Efficiency of Iodinated Individual Protection Filters

    National Research Council Canada - National Science Library

    Heimbuch, B. K; Proudfoot, E; Wander, J; Laventure, G; McDonald, R; Burr, E

    2004-01-01

    .... The overall goal of the project is to replace existing high efficiency particulate air (HEPA) media with the antimicrobial membrane for both individual protection and collective protection devices...

  4. Aquaporin-4 expression in distal myopathy with rimmed vacuoles

    OpenAIRE

    Hoshi, Akihiko; Yamamoto, Teiji; Kikuchi, Saeko; Soeda, Tomoko; Shimizu, Keiko; Ugawa, Yoshikazu

    2012-01-01

    Abstract Background Distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy is clinically characterized by the early involvement of distal leg muscles. The striking pathological features of the myopathy are muscle fibers with rimmed vacuoles. To date, the role of aquaporin-4 water channel in distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy has not been studied. Case presentation Here, we studied the expression of aquaporin-4 in muscle fibers of a patient...

  5. Refractory rickets caused by mild distal renal tubular acidosis

    OpenAIRE

    Ji-Ho Lee; Joo Hyun Park; Tae-Sun Ha; Heon-Seok Han

    2013-01-01

    Type I (distal) renal tubular acidosis (RTA) is a disorder associated with the failure to excrete hydrogen ions from the distal renal tubule. It is characterized by hyperchloremic metabolic acidosis, an abnormal increase in urine pH, reduced urinary excretion of ammonium and bicarbonate ions, and mild deterioration in renal function. Hypercalciuria is common in distal RTA because of bone resorption, which increases as a buffer against metabolic acidosis. This can result in intractable rickets...

  6. Distal Xq duplication and functional Xq disomy

    Directory of Open Access Journals (Sweden)

    Schluth-Bolard Caroline

    2009-02-01

    Full Text Available Abstract Distal Xq duplications refer to chromosomal disorders resulting from involvement of the long arm of the X chromosome (Xq. Clinical manifestations widely vary depending on the gender of the patient and on the gene content of the duplicated segment. Prevalence of Xq duplications remains unknown. About 40 cases of Xq28 functional disomy due to cytogenetically visible rearrangements, and about 50 cases of cryptic duplications encompassing the MECP2 gene have been reported. The most frequently reported distal duplications involve the Xq28 segment and yield a recognisable phenotype including distinctive facial features (premature closure of the fontanels or ridged metopic suture, broad face with full cheeks, epicanthal folds, large ears, small and open mouth, ear anomalies, pointed nose, abnormal palate and facial hypotonia, major axial hypotonia, severe developmental delay, severe feeding difficulties, abnormal genitalia and proneness to infections. Xq duplications may be caused either by an intrachromosomal duplication or an unbalanced X/Y or X/autosome translocation. In XY males, structural X disomy always results in functional disomy. In females, failure of X chromosome dosage compensation could result from a variety of mechanisms, including an unfavourable pattern of inactivation, a breakpoint separating an X segment from the X-inactivation centre in cis, or a small ring chromosome. The MECP2 gene in Xq28 is the most important dosage-sensitive gene responsible for the abnormal phenotype in duplications of distal Xq. Diagnosis is based on clinical features and is confirmed by CGH array techniques. Differential diagnoses include Prader-Willi syndrome and Alpha thalassaemia-mental retardation, X linked (ATR-X. The recurrence risk is significant if a structural rearrangement is present in one of the parent, the most frequent situation being that of an intrachromosomal duplication inherited from the mother. Prenatal diagnosis is performed by

  7. Refractory rickets caused by mild distal renal tubular acidosis

    Directory of Open Access Journals (Sweden)

    Ji-Ho Lee

    2013-09-01

    Full Text Available Type I (distal renal tubular acidosis (RTA is a disorder associated with the failure to excrete hydrogen ions from the distal renal tubule. It is characterized by hyperchloremic metabolic acidosis, an abnormal increase in urine pH, reduced urinary excretion of ammonium and bicarbonate ions, and mild deterioration in renal function. Hypercalciuria is common in distal RTA because of bone resorption, which increases as a buffer against metabolic acidosis. This can result in intractable rickets. We describe a case of distal RTA with nephrocalcinosis during follow-up of rickets in a patient who presented with clinical manifestations of short stature, failure to thrive, recurrent vomiting, dehydration, and irritability.

  8. Outcome in corrective osteotomy for malunited distal radius fractures.

    Science.gov (United States)

    Samson, Lucjan; Treder, Mariusz; Kolarz, Krzysztof; Lorczyński, Adam

    2007-01-01

    This article reports outcome in osteotomy for malunion of distal radius fractures. We evaluated 12 patients with distal radius malunion (mean age 54), who were treated with corrective osteotomy. Wrist motion and grip strength were evaluated, along with examination of pre and post osteotomy radiographs. The indications for corrections were degree of deformity, limitation of function, pain, and the appearance of the wrist. The radiographic evaluation proved that the restoration of the normal anatomic relationship between the distal radius and ulna leads to significant improvement of the function of the hand, as measured by range of motion and grip strength. Osteotomy of the distal radius in cases of malunion gives favorable outcomes.

  9. Computed tomography diagnosis of distal radioulnar joint subluxation

    International Nuclear Information System (INIS)

    Lu Laijin; Nakamura, Ryogo; Nakao, Etsuhiro; Hidaka, Yasuhiro; Shionoya, Kaori.

    1995-01-01

    Although computed tomography (CT) provides the most reliable diagnostic information about distal radioulnar joint dislocation and subluxation, the method for assessing distal radioulnar joint integrity on CT is controversial. We studied roentgenographic diagnosis and three methods of CT diagnosis in 20 patients with suspected distal radioulnar dislocation or subluxation. Sensitivity was 35% in roentgenographic diagnosis and 70 to 100% in CT diagnosis. Of the three methods of CT diagnosis, Mino's radioulnar line method showed 100% sensitivity to subluxation including dislocation. We believe Mino's method is the most reliable method for the diagnosis of distal radioulnar dislocation in unilateral CT. (author)

  10. Computed tomography diagnosis of distal radioulnar joint subluxation

    Energy Technology Data Exchange (ETDEWEB)

    Lu Laijin [Bethune (N.) Medical Univ., Changchun, JL (China); Nakamura, Ryogo; Nakao, Etsuhiro; Hidaka, Yasuhiro; Shionoya, Kaori

    1995-08-01

    Although computed tomography (CT) provides the most reliable diagnostic information about distal radioulnar joint dislocation and subluxation, the method for assessing distal radioulnar joint integrity on CT is controversial. We studied roentgenographic diagnosis and three methods of CT diagnosis in 20 patients with suspected distal radioulnar dislocation or subluxation. Sensitivity was 35% in roentgenographic diagnosis and 70 to 100% in CT diagnosis. Of the three methods of CT diagnosis, Mino`s radioulnar line method showed 100% sensitivity to subluxation including dislocation. We believe Mino`s method is the most reliable method for the diagnosis of distal radioulnar dislocation in unilateral CT. (author).

  11. About Personal Protective Equipment (PPE)

    Science.gov (United States)

    ... Health and Human Services U.S. Food and Drug Administration A to Z Index Follow FDA En ... Devices Products and Medical Procedures General Hospital Devices and Supplies Personal Protective Equipment for Infection ...

  12. Post-transplant distal limb syndrome

    Directory of Open Access Journals (Sweden)

    María Florencia Borghi Torzillo

    2017-02-01

    Full Text Available The post-transplant distal limb syndrome is a not well known entity, with a prevalence of 5% in patients with renal transplant. Its diagnosis is based on clinical symptoms, bone scintigraphy and MRI, it has a benign course and the patient recovers without sequel. We present the case of a 37-year-old male, with medical history of hypertension, Berger's disease in 1999 that required dialysis three times a week for four years (2009-2013 and renal transplant in 2013. The patient consults on January 2014 referring severe pain in both feet, with sudden onset; he remembers the exact date of the beginning of the pain and denies trauma, pain prevents ambulation. The bone scintigraphy shows pathological uptake in both feet with no difference between the two. Although there is no treatment for this disease, it has a benign course

  13. Industrial fabrication of an optical security device for document protection using plasmon resonant transmission through a thin corrugated metallic film embedded on a plastic foil

    Science.gov (United States)

    Sauvage-Vincent, Jean; Jourlin, Yves; Tonchev, Svetlen; Veillas, Colette; Claude, Pedri; Parriaux, Olivier

    2012-06-01

    Known since a long time in polymer banknotes and presented in the few years in paper banknotes, the principle of windowed documents has been currently extended to ID documents. We present an innovative solution which combines resonant transmission and Zero Order Device technologies and which is dedicated to improve windows in terms of the overt security level. With this R&D program, Hologram Industries targeted to obtain an overt visual security device that should be readily checked in transmission in the same manner as the established paper watermark. The proposed solution is based on the propagation of resonant modes in a thin continuous corrugated metallic layer embedded (encapsulated) between two dielectric layers of near equal refractive index. The mode of most interest is the Long Range Plasmon Mode. The coupling condition to the Long Range Mode is principally related to the corrugation, the metal layer thickness and the index of the two dielectric layers. If the condition of the mode excitation through the grating is fulfilled, a predetermined wavelength will be coupled to the Long Range Plasmon Mode. This mode will propagate at each metal/dielectric interface with a low loss and will concentrate the electric field inside the metal layer. This effect of coupling enables the transmission of a peak at this wavelength through the metallic layer. It defines the so called "extraordinary resonant transmission".

  14. Early control of distal internal carotid artery during carotid endarterectomy: does it reduce cerebral microemboli?

    Science.gov (United States)

    Mommertz, G; Das, M; Langer, S; Koeppel, T A; Krings, T; Mess, W H; Schiefer, J; Jacobs, M J

    2010-06-01

    According to the results of the large trials on carotid endarterectomy (CEA), this type of surgery is only warranted if perioperative mortality and morbidity are kept considerably low. Less attention has been paid to methods of cerebral protection during CEA, although intraoperative transcranial Doppler (TCD) can visualise intracerebral microemboli (MES) during routine carotid dissection, although MES occur throughout the CEA, only those during dissection are related to neurological outcome. Prevention of MES by means of early control of the distal internal carotid artery dislodging from the carotid artery plaque during dissection is very likely the mechanism behind an eventual benefit from this approach. Hence, the amount of MES might serve as a surrogate parameter for the risk of periprocedural neurological events. So, the aim of the present study was to evaluate whether early control of the distal carotid artery during CEA is capable of reducing the number of MES by means of a prospective randomised trial. Twenty-eight patients (29 procedures) could be prospectively included in our study. Before surgery we randomly assigned the patients to two groups: group A (N.=12): CEA by means of early control of the distal internal carotid artery; group B (N.=17): CEA with dissection of the total carotid bifurcation before clamping the arteries. Periprocedurally, we continuously monitored the cerebral blood flow in the ipsilateral middle cerebral artery by means of TCD. Pre- and postoperative morbidity were independently verified by a neurologist control of the distal internal carotid artery did not reduce the occurrence of MES during dissection of the carotid bifurcation. Also, the total number of MES throughout the procedure and postoperatively was comparable between both groups. The procedure related times as well as the clinical outcome did not differ significantly. Thus, early control of the distal internal carotid artery has got no advantage but also no disadvantage

  15. Comparison of tooth displacement between buccal mini-implants and palatal plate anchorage for molar distalization: a finite element study.

    Science.gov (United States)

    Yu, Il-Jun; Kook, Yoon-Ah; Sung, Sang-Jin; Lee, Kee-Joon; Chun, Youn-Sic; Mo, Sung-Seo

    2014-08-01

    The purposes of this study were to mechanically evaluate distalization modalities through the application of skeletal anchorage using finite element analysis. Base models were constructed from commercial teeth models. A finite element model was created and three treatment modalities were modified to make 10 models. Modalities 1 and 2 placed mini-implants in the buccal side, and modality 3 placed a plate on the palatal side. Distalization with the palatal plate in modality 3 showed bodily molar movement and insignificant displacement of the incisors. Placing mini-implants on the buccal side in modalities 1 and 2 caused the first molar to be distally tipped and extruded, while the incisors were labially flared and intruded. Distalization with the palatal plate rather than mini-implants on the buccal side provided bodily molar movement without tipping or extrusion. It is recommended to use our findings as a clinical guide for the application of skeletal anchorage devices for molar distalization. © The Author 2011. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved. For permissions, please email: journals.permissions@oup.com.

  16. Surge suppressors devices application for protection of consumer head boxes; Aplicacao de supressores de surtos para a protecao da entrada de consumidores

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jose Mario Moraes e; Ravaglio, Marcelo Antonio; Schaefer, Jose Carlos [Instituto de Tecnologia para o Desenvolvimento (LACTEC), Curitiba, PR (Brazil). Unidade de Alta Tensao]. E-mails: zemario@lactec.org.br; marcelo@lactec.org.br; schaefer@lactec.org.br; Biazon, Rodolfo B.; Barbosa Junior, Lari; Ferreira Junior, Homero [Companhia Luz e Forca Santa Cruz, SP (Brazil)]. E-mails: rbiazon@santacruz.srv.br; hferreira@santacruz.srv.br; lbarbosa@santacruz.srv.br

    2002-07-01

    This paper presents the main results obtained from a joint project developed by the LACTEC and Santa Cruz Light and Power Company for validation the using of surge suppressors equipment installed at the low voltage consumer head boxes. The project proposed the implementation of a atmospheric discharges first protection of the consumer equipment. The work analysed surge suppressors from different known competent manufacturers in the market. The suppressors has been evaluated in the LACTEC high voltage laboratory, and in the CLFSC distribution system for a period of one year started in August 2000.

  17. [Comparison of laparoscopic distal pancreatectomy and open distal pancreatectomy in pancreatic ductal adenocarcinoma].

    Science.gov (United States)

    Xu, K; Su, J J; Su, M; Yan, L; Feng, J; Xin, X L; Chen, Y L

    2017-10-23

    Objective: To compare and evaluate the curative effect of laparoscopic distal pancreatectomy(LDP) and traditional open distal pancreatectomy(ODP) in pancreatic ductal adenocarcinoma. Methods: The clinical data of 15 patients treated by LDP and 87 contemporaneous cases treated by ODP from January 2010 to November 2015 was collected, and the curative effect and prognosis of these patients were retrospectively analyzed. Results: The operation time of LDP group was (286.5±48.1) min, significantly longer than that of OPD group(226.6±56.8) min ( P 0.05). In both LDP group and ODP group, none occurred percutaneous drainage, re-admissions, second operation or perioperative death. Conclusions: Compared to ODP, LDP is much safer and more steady in perioperative periodand operation. Patients of pancreatic ductal adenocarcinoma received LDP can acquire more benefit and recovery sooner, and LDP is a safe and effective operative method.

  18. [Retrograde locking nail osteosynthesis of distal femoral fractures with the distal femoral nail (DFN)].

    Science.gov (United States)

    Grass, R; Biewener, A; Rammelt, S; Zwipp, H

    2002-04-01

    Non-operative treatment with immobilization or isometric traction has been abandoned as treatment for fractures of the distal femur at the end of the 1960ies. The technique of open reduction and internal fixation with a condylar plate as suggested by the AO has been the golden standard since the 1970ies. However, anatomic reconstruction of the condylar region with interfragmentary screw fixation and axial realignment of the femur shaft with a plate are challenging procedures especially in the presence of severely compromised soft tissues and put periosteal blood supply at risk. Soft tissue complications, axial malalignment and delayed fracture healing times led to the consideration of alternative techniques, such as intramedullary nailing which has been practiced with success since the 1940ies by Gerhard Küntscher and colleagues for femoral shaft fractures with minimal complication rates and improved results after closed reduction. The era of retrograde femoral nailing began with the systematic approach through the intercondylar notch by Green. This paper reviews the biomechanical properties, indication, technique as well as potential hazards and pitfalls of fracture management with the AO "distal femoral nail" (DFN). With appropriate application this technique is suitable for all fractures of the distal third of the femoral shaft including highly instable bicondylar fractures without damage to the soft tissues and the knee joint.

  19. Urethral advancement procedure in the treatment of primary distal ...

    African Journals Online (AJOL)

    Introduction: Distal hypospadias is the most common genital anomaly, occurring in almost 65% of all hypospadias cases. Although there are several surgical techniques for the treatment of distal hypospadias, it is clear that none can be used to correct all forms of hypospadias. The aim of the study was to evaluate urethral ...

  20. Experience with Quartey's Distal Penile Island Skin Flap ...

    African Journals Online (AJOL)

    Objective: To evaluate our experience with Quartey's distal penile island skin flap urethroplasty in the treatment of urethral stricture in two tertiary hospitals in South Western Nigeria. Patients and Methods: Between June 2002 and May 2005, 18 patients with a mean age of 42.2 years (range: 25 – 75 years) underwent distal ...

  1. Distal radius fractures: what determines the outcome after surgery?

    NARCIS (Netherlands)

    Teunis, T.

    2016-01-01

    This thesis addresses current issues in the outcome of operatively treated distal radius fractures. The general aim was to determine factors associated with adverse events, loss of motion, functional limitations, and opioid use after surgery. Injury In 3D complete articular distal radius fracture

  2. Outcome of ureteroscopy for the management of distal ureteric calculi

    African Journals Online (AJOL)

    Objective: To review our 5 years' experience with ureteroscopy treatment of distal ureteric calculi. Patients and methods: We reviewed the medical records of 136 patients who underwent ureteroscopic procedures for the treatment of distal ureteric calculi from February 2007 to October 2012. Patient and stone characteristics, ...

  3. Clinical relevance of distal biceps insertional and footprint anatomy

    NARCIS (Netherlands)

    van den Bekerom, Michel P J; Kodde, Izaäk F.; Aster, Asir; Bleys, Ronald L A W|info:eu-repo/dai/nl/134440455; Eygendaal, Denise

    2016-01-01

    Purpose: The aim of this review was to present an overview, based on a literature search, of surgical anatomy for distal biceps tendon repairs, based on the current literature. Methods: A narrative review was performed using Pubmed/Medline using key words: Search terms were distal biceps,

  4. Current concepts in fractures of the distal femur.

    Science.gov (United States)

    Link, B-C; Babst, R

    2012-01-01

    This paper describes current treatment strategies of distal femoral fractures as well as their evidence based rationale. The treatment of distal femoral fractures has improved with the evolution of plating and nailing technologies. The commonly selected surgical approaches are outlined and surgical treatment techniques including both internal and external fixation are discussed.

  5. Distal clavicular osteolysis: MR evidence for subchondral fracture

    Energy Technology Data Exchange (ETDEWEB)

    Kassarjian, Ara; Palmer, William E. [Massachusetts General Hospital, Department of Radiology, Division of Musculoskeletal Radiology, Yawkey Center, Boston, MA (United States); Llopis, Eva [Hospital de la Ribera, Department of Radiology, Valencia (Spain)

    2007-01-15

    To investigate the association between distal clavicular osteolysis and subchondral fractures of the distal clavicle at MRI. This study was approved by the hospital human research committee, which waived the need for informed consent. Three radiologists retrospectively analyzed 36 shoulder MR examinations in 36 patients with imaging findings of distal clavicular osteolysis. The presence of a subchondral fracture of the distal clavicle, abnormalities of the acromioclavicular joint, rotator cuff tears and labral tears were assessed by MRI. These cases were then compared with 36 age-matched controls. At MRI, 31 of 36 patients (86%) had a subchondral line within the distal clavicular edema, consistent with a subchondral fracture. Of the 36 patients, 32 (89%) had fluid in the acromioclavicular joint, while 27 of 36 patients (75%) had cysts or erosions in the distal clavicle. There were 13 patients (36%) with associated labral tears, while eight patients (22%) had partial-thickness rotator cuff tears. In the control group one of 36 (3%) had a subchondral line (P<0.05), while ten of 36 (28%) had rotator cuff tears and 13 of 36 (36%) had labral tears. These latter two were not statistically significant between the groups. A distal clavicular subchondral fracture is a common finding in patients with imaging evidence of distal clavicular osteolysis. These subchondral fractures may be responsible for the propensity of findings occurring on the clavicular side of the acromioclavicular joint. (orig.)

  6. Complications of Minimally Invasive Percutaneous Plating for Distal Tibial Fractures

    OpenAIRE

    Muzaffar, Nasir; Bhat, Rafiq; Yasin, Mohammad

    2016-01-01

    Background The management of distal tibia fractures continues to remain a source of controversy and debate. Objectives The aim of this study was to evaluate the various complications of minimally invasive percutaneous plate osteosynthesis (MIPPO) using a locking plate for closed fractures of distal tibia in a retrospective study. Patients and Methods Twenty-five patients with dista...

  7. Distal tibiofibular synostosis in a Nigerian: A case report | Owoeye ...

    African Journals Online (AJOL)

    X-ray of the bones showed an oblique fracture in the distal end of the shaft of fibula which is suggestive of post traumatic tibiofibular synostosis (TFS). Knowledge of distal TFS is important in resolving the puzzle of chronic shin pain of unknown origin and in accurate diagnosis of causes of ankle deformity and malformations.

  8. Outcome of management of distal radius fractures in ...

    African Journals Online (AJOL)

    We tried to highlight that postmenopausal distal radius fractures attributed to osteoporosis, are not given much of consideration when lot of funds and researches are being diverted to osteoporosis and related diseases. Methods: 60 elderly female patients with distal radius fracture were studied for outcome. The primary ...

  9. Distal Oblique Bundle Reinforcement for Treatment of DRUJ Instability

    NARCIS (Netherlands)

    Brink, P.R.G.; Hannemann, P.F.

    2015-01-01

    Background Chronic, dynamic bidirectional instability in the distal radioulnar joint (DRUJ) is diagnosed clinically, based on the patient's complaints and the finding of abnormal laxity in the vicinity of the distal ulna. In cases where malunion is ruled out or treated and there are no signs of

  10. Population-based epidemiology and incidence of distal femur fractures

    DEFF Research Database (Denmark)

    Elsoe, Rasmus; Ceccotti, Adriano Axel; Larsen, Peter

    2018-01-01

    The literature lacks recent epidemiological studies on the incidence, trauma mechanism and fracture classification of distal femur fractures. The aim of the present study was to provide up-to-date information concerning the incidence of distal femur fractures in a large and complete population...

  11. Radiographic study of distal radial physeal closure in thoroughbred horses

    International Nuclear Information System (INIS)

    Vulcano, L.C.; Mamprim, M.J.; Muniz, L.M.R.; Moreira, A.F.; Luna, S.P.L.

    1997-01-01

    Monthly radiography was performed to study distal radial physeal closure in ten male and ten female Throughbred horses. The height, thoracic circumference and metacarpus circumference were also measured, Distal radial physeal closure time was sooner in females than males, and took 701 +/- 37 and 748 +/- 55 days respectively

  12. Mobile device security for dummies

    CERN Document Server

    Campagna, Rich; Krishnan, Ashwin

    2011-01-01

    The information you need to avoid security threats on corporate mobile devices Mobile devices have essentially replaced computers for corporate users who are on the go and there are millions of networks that have little to no security. This essential guide walks you through the steps for securing a network and building a bulletproof framework that will protect and support mobile devices in the enterprise. Featuring real-world case scenarios, this straightforward guide shares invaluable advice for protecting mobile devices from the loss of sensitive and confidential corporate informati

  13. Proximal and distal muscle fatigue differentially affect movement coordination

    Science.gov (United States)

    Cowley, Jeffrey C.

    2017-01-01

    Muscle fatigue can cause people to change their movement patterns and these changes could contribute to acute or overuse injuries. However, these effects depend on which muscles are fatigued. The purpose of this study was to determine the differential effects of proximal and distal upper extremity muscle fatigue on repetitive movements. Fourteen subjects completed a repetitive ratcheting task before and after a fatigue protocol on separate days. The fatigue protocol either fatigued the proximal (shoulder flexor) or distal (finger flexor) muscles. Pre/Post changes in trunk, shoulder, elbow, and wrist kinematics were compared to determine how proximal and distal fatigue affected multi-joint movement patterns and variability. Proximal fatigue caused a significant increase (7°, p fatigue caused small but significant changes in trunk angles (2°, p fatigue protocols (p fatigue at either proximal or distal joints. The identified differences between proximal and distal muscle fatigue adaptations could facilitate risk assessment of occupational tasks. PMID:28235005

  14. Clinical relevance of distal biceps insertional and footprint anatomy.

    Science.gov (United States)

    van den Bekerom, Michel P J; Kodde, Izaäk F; Aster, Asir; Bleys, Ronald L A W; Eygendaal, Denise

    2016-07-01

    The aim of this review was to present an overview, based on a literature search, of surgical anatomy for distal biceps tendon repairs, based on the current literature. A narrative review was performed using Pubmed/Medline using key words: Search terms were distal biceps, insertional, and anatomy. Last decade, the interest in both reconstruction techniques, as well as surgical anatomy of the distal biceps tendon, has increased. The insights into various aspects of distal biceps tendon anatomy (two tendons, bicipital tuberosity, lacertus fibrosis, bicipital-radial bursa, posterior interosseous nerve, and lateral antebrachial cutaneous nerve) have evolved significantly in the last years. Thorough knowledge of the anatomy is essential for the surgeon in order to understand the biomechanics of rupture and reconstruction of the distal biceps tendon and to avoid injuries of the nerves. Some tips and tricks are provided, and some pitfalls were described to avoid complications and optimize surgical outcome. IV.

  15. Rapid, Sensitive, and Specific Lateral-Flow Immunochromatographic Device To Measure Anti-Anthrax Protective Antigen Immunoglobulin G in Serum and Whole Blood

    Science.gov (United States)

    Biagini, Raymond E.; Sammons, Deborah L.; Smith, Jerome P.; MacKenzie, Barbara A.; Striley, Cynthia A. F.; Snawder, John E.; Robertson, Shirley A.; Quinn, Conrad P.

    2006-01-01

    Evidence from animals suggests that anti-anthrax protective antigen (PA) immunoglobulin G (IgG) from vaccination with anthrax vaccine adsorbed (AVA) is protective against Bacillus anthracis infection. Measurement of anti-PA IgG in human sera can be performed using either enzyme-linked immunosorbent assay or fluorescent covalent microsphere immunoassay (ELISA) (R. E. Biagini, D. L. Sammons, J. P. Smith, B. A. MacKenzie, C. A. Striley, V. Semenova, E. Steward-Clark, K. Stamey, A. E. Freeman, C. P. Quinn, and J. E. Snawder, Clin. Diagn. Lab. Immunol. 11:50-55, 2004). Both these methods are laboratory based. We describe the development of a rapid lateral-flow immunochromatographic assay (LFIA) test kit for the measurement of anti-PA IgG in serum or whole-blood samples (30-μl samples) using colloidal gold nanoparticles as the detection reagent and an internal control. Using sera from 19 anthrax AVA vaccinees (anti-PA IgG range, 2.4 to 340 μg/ml) and 10 controls and PA-supplemented whole-blood samples, we demonstrated that the LFIA had a sensitivity of approximately 3 μg/ml anti-PA IgG in serum and ∼14 μg/ml anti-PA IgG in whole blood. Preabsorption of sera with PA yielded negative anti-PA LFIAs. The diagnostic sensitivity and specificity of the assay were 100% using ELISA-measured anti-PA IgG as the standard. This kit has utility in determining anti-PA antibody reactivity in the sera of individuals vaccinated with AVA or individuals with clinical anthrax. PMID:16682473

  16. Linear intra-bone geometry dependencies of the radius: Radius length determination by maximum distal width

    International Nuclear Information System (INIS)

    Baumbach, S.F.; Krusche-Mandl, I.; Huf, W.; Mall, G.; Fialka, C.

    2012-01-01

    Purpose: The aim of the study was to investigate possible linear intra-bone geometry dependencies by determining the relation between the maximum radius length and maximum distal width in two independent populations and test for possible gender or age effects. A strong correlation can help develop more representative fracture models and osteosynthetic devices as well as aid gender and height estimation in anthropologic/forensic cases. Methods: First, maximum radius length and distal width of 100 consecutive patients, aged 20–70 years, were digitally measured on standard lower arm radiographs by two independent investigators. Second, the same measurements were performed ex vivo on a second cohort, 135 isolated, formalin fixed radii. Standard descriptive statistics as well as correlations were calculated and possible gender age influences tested for both populations separately. Results: The radiographic dataset resulted in a correlation of radius length and width of r = 0.753 (adj. R 2 = 0.563, p 2 = 0.592) and side no influence on the correlation. Radius length–width correlation for the isolated radii was r = 0.621 (adj. R 2 = 0.381, p 2 = 0.598). Conclusion: A relatively strong radius length–distal width correlation was found in two different populations, indicating that linear body proportions might not only apply to body height and axial length measurements of long bones but also to proportional dependency of bone shapes in general.

  17. Device useful as a borehole fluid sampler

    Energy Technology Data Exchange (ETDEWEB)

    Freifeld, Barry M.

    2018-01-09

    The present invention provides a device comprising: (a) a proximal end of the device comprises an inner first conduit within the lumen of an outer second conduit, (b) a distal end of the device comprises the outer second conduit in fluid communication with a third conduit and a fourth conduit through a Y-shaped, T-shaped or U-shaped junction, (c) the third conduit terminates in a triggering mechanism, and (d) the fourth conduit is in fluid communication through a one-way valve, wherein fluid can only convey in a direction from the fourth conduit towards the second outer conduit, with an aperture.

  18. Digital protection in power plants. Electrical unit and line protection. Digital protection systems for NPP

    International Nuclear Information System (INIS)

    Kaczmarek, A.

    2000-01-01

    In this presentation author deals with the digital protection systems for nuclear power plants. The evolution of protection devices, protection concept for power plants, concept of functional redundancy, references for digital protection, benefits for the customer well as concept fault recorder are presented. (author)

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

    Science.gov (United States)

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

    2015-01-01

    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. 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. 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). 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.

  20. Concentration device

    DEFF Research Database (Denmark)

    2013-01-01

    A concentration device (2) for filter filtration concentration of particles (4) from a volume of a fluid (6). The concentration device (2) comprises a filter (8) configured to filter particles (4) of a predefined size in the volume of the fluid (6). The concentration device (2) comprises...

  1. Photovoltaic device

    Energy Technology Data Exchange (ETDEWEB)

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-09-01

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device (10) with a multilayered photovoltaic cell assembly (100) and a body portion (200) joined at an interface region (410) and including an intermediate layer (500), at least one interconnecting structural member (1500), relieving feature (2500), unique component geometry, or any combination thereof.

  2. Photovoltaic device

    Energy Technology Data Exchange (ETDEWEB)

    Reese, Jason A; Keenihan, James R; Gaston, Ryan S; Kauffmann, Keith L; Langmaid, Joseph A; Lopez, Leonardo; Maak, Kevin D; Mills, Michael E; Ramesh, Narayan; Teli, Samar R

    2017-03-21

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device with a multilayered photovoltaic cell assembly and a body portion joined at an interface region and including an intermediate layer, at least one interconnecting structural member, relieving feature, unique component geometry, or any combination thereof.

  3. Ipsilateral olecranon and distal radius fracture: A case report.

    Science.gov (United States)

    Cengiz, Ömer; Polat, Gökhan; Karademir, Gökhan; Kara, Deniz; Erdil, Mehmet

    2015-01-01

    Concomitant ipsilateral olecranon and distal radius fracture are rare injuries. Their clinical presentation is unusual and investigation and management is poorly described. We present a 55-year-old woman patient who fell off sustaining a concomitant distal radius and olecranon fracture in the same extremity. On examination, there was gross swelling of the proximal and distal forearm and no neurovascular deficit. Radiographs confirmed distal radius and olecranon fracture. Patient was treated with open reduction and anatomic locking plate for olecranon and a closed reduction percuteneous K wire fixation with penning fixator for distal radius fracture. After physical therapy program, functional results were good and DASH score was 60. Several different combinations of fracture with dislocation have been described, but, to our knowledge, concurrent ipsilateral olecranon and distal radius fracture has not been reported before. In the literature review there are two similar cases in the English literature. Ipsilateral olecranon and distal radius fracture is a very rare injury due to different trauma mechanisms. However we should keep in mind that there may be adjacent joints and structures for concomitant injuries. Copyright © 2014 The Authors. Published by Elsevier Ltd.. All rights reserved.

  4. A comparison between robotic-assisted laparoscopic distal pancreatectomy versus laparoscopic distal pancreatectomy.

    Science.gov (United States)

    Goh, Brian K P; Chan, Chung Yip; Soh, Hui-Ling; Lee, Ser Yee; Cheow, Peng-Chung; Chow, Pierce K H; Ooi, London L P J; Chung, Alexander Y F

    2017-03-01

    This study aims to compare the early perioperative outcomes of robotic-assisted laparoscopic distal pancreatectomy (RDP) versus laparoscopic distal pancreatectomy (LDP). The clinicopathologic features of 45 consecutive patients who underwent minimally-invasive distal pancreatectomy from 2006 to 2015 were retrospectively reviewed. Thirty-nine patients who met our study criteria were included. Eight patients underwent RDP and 31 had LDP. There were 10 (25.6%) open conversions. Six (15.4%) patients had major (> grade 2) morbidities and there was no in-hospital mortality. There were 14 (35.9%) grade A and 9 (23.1%) grade B pancreatic fistulas. Comparison between RDP and LDP demonstrated no significant difference between the patients' baseline characteristics except there was increased frequency of spleen-preserving pancreatectomies (3 (37.5%) vs 25 (80.6%), P=0.016) and splenic-vessel preservation (5 (62.5%) vs 4 (12.9%), P=0.003) in RDP. Comparison between outcomes demonstrated that RDP was associated with a longer median operation time (452.5 (range, 300-685) vs 245 min (range, 85-430), P=0.001) and increased frequency of the procedure completed purely laparoscopically (8 (100%) vs 18 (58.1%), P=0.025). RDP can be safely adopted and is equivalent to LDP in most perioperative outcomes. It is also associated with a decreased frequency of the need for hand-assistance laparoscopic surgery or open conversion but needed a longer operation time. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

  5. Protection of electronic circuits from overvoltages

    CERN Document Server

    Standler, Ronald B

    1989-01-01

    Practical rules and strategies designed to protect electronic systems from damage by transient overvoltages include symptoms and threats, remedies, protective devices and their applications, and validation of protective measures. 1989 edition.

  6. Tratamento cirúrgico da tendinite distal da patela Surgical treatment of the distal patellar tendinitis

    Directory of Open Access Journals (Sweden)

    Marco Martins Amatuzzi

    2005-01-01

    Full Text Available A tendinite distal da patela é uma doença que acomete principalmente jovens esportistas e caracteriza-se por dor referida na extremidade distal da patela junto à inserção do ligamento patelar. O tratamento inicial preconizado é sempre conservador com fisioterapia. A grande maioria tem boa resposta a este tipo de conduta, mas em alguns raros casos os sintomas não regridem exigindo uma mudança de conduta. Para este grupo usamos o tratamento cirúrgico com técnica derivada de Trillat que se baseia na utilização de um enxerto de parte do tendão do músculo Grácil implantado dentro do ligamento patelar, inserido intra-ósseo na patela e fixado na tuberosidade anterior da tíbia. Foram operados seis pacientes, sendo que em dois casos a operação foi bilateral, totalizando oito joelhos. O seguimento mínimo foi de três anos, com avaliação final dentro do índice considerado como EXCELENTE, conforme a cotação ARPÉGE, para todos os joelhos.Distal patellar tendinitis is a young athlete's disease characterized by pain at the distal patellar pole, near the patellar ligament insertion. Early treatment recommended is generally conservative, with physical therapy. The great majority of patients present favorable responses to this approach, but, in some cases, the remission of symptoms does not occur, requiring a different approach. For this group, surgical treatment with a technique derived from that of Trillat was used, which is based on the use of a graft removed from a portion of gracillis muscle tendon into patellar ligament, intraosseously inserted in the patella and fixed at the tibial anterior tuberosity. Six patients were operated, bilaterally in two cases, totaling eight knees. The minimum follow-up time was three years, with all knees presenting an EXCELLENT score, according to ARPÉGE evaluation.

  7. Femoral derotation osteotomy in spastic diplegia. Proximal or distal?

    Science.gov (United States)

    Pirpiris, M; Trivett, A; Baker, R; Rodda, J; Nattrass, G R; Graham, H K

    2003-03-01

    We describe the results of a prospective study of 28 children with spastic diplegia and in-toed gait, who had bilateral femoral derotation osteotomies undertaken at either the proximal intertrochanteric or the distal supracondylar level of the femur. Preoperative clinical evaluation and three-dimensional movement analysis determined any additional soft-tissue surgery. Distal osteotomy was faster with significantly lower blood loss than proximal osteotomy. The children in the distal group achieved independent walking earlier than those in the proximal group (6.9 +/- 1.3 v 10.7 +/- 1.7 weeks; p spastic diplegia.

  8. Intra-Articular Osteotomy for Distal Humerus Malunion

    Directory of Open Access Journals (Sweden)

    René K. Marti

    2009-01-01

    Full Text Available Intra-articular osteotomy is considered in the rare case of malunion after a fracture of the distal humerus to restore humeral alignment and gain a functional arc of elbow motion. Traumatic and iatrogenic disruption of the limited blood flow to the distal end of the humerus resulting in avascular necrosis of capitellum or trochlea is a major pitfall of the this technically challenging procedure. Two cases are presented which illustrate the potential problems of intra-articular osteotomy for malunion of the distal humerus.

  9. Adenoma of the distal common bile duct -a case report-

    International Nuclear Information System (INIS)

    Do, Young Soo; Lee, Hyun Gon; Han, Ho Seong; Ko, Gyung Hyuck; Kim, Jae Hyoung; Kim, Hyung Jin; Chung, Sung Hoon

    1991-01-01

    On rare occasions, Obstructive Jaundice may be caused by a benign tumor of the biliary tract. We describe a patient in whom the diagnosis of an adenoma of the distal common bile duct (CBD) was established. The CT showed a soft tissue density mass in the distal CBD and diffuse dilatation of the intrahepatic duct, gall the bladder, and CBD. Endoscopic retrograde cholangiopnacreatography showed an irregularly marginated polypoid mass in the distal CBD. The clinical, radiological, and histological features of this neoplasm are reviewed. The clinical, radiological and histological features of this neoplasm are reviewed

  10. The distally-based island ulnar artery perforator flap for wrist defects

    Directory of Open Access Journals (Sweden)

    Karki Durga

    2007-01-01

    Full Text Available Background: Reconstruction of soft tissue defects around the wrist with exposed tendons, joints, nerves and bone represents a challenge to plastic surgeons, and such defects necessitate flap coverage to preserve hand functions and to protect its vital structures. We evaluated the use of a distally-based island ulnar artery perforator flap in patients with volar soft tissue defects around the wrist. Materials and Methods: Between June 2004 and June 2006, seven patients of soft tissue defects on the volar aspect of the wrist underwent distally-based island ulnar artery perforator flap. Out of seven patients, five were male and two patients were female. This flap was used in the reconstruction of the post road traffic accident defects in four patients and post electric burn defects in three patients. Flap was raised on one or two perforators and was rotated to 180°. Results: All flaps survived completely. Donor sites were closed primarily without donor site morbidity. Conclusion: The distally-based island Ulnar artery perforator flap is convenient, reliable, easy to manage and is a single-stage technique for reconstructing soft tissue defects of the volar aspect of the wrist. Early use of this flap allows preservation of vital structures, decreases morbidity and allows for early rehabilitation.

  11. [Case of internal carotid artery stenosis complicated with shower embolism during filter-protected carotid artery stenting].

    Science.gov (United States)

    Hayashi, Kentaro; Kitagawa, Naoki; Morikawa, Minoru; Hiu, Takeshi; Morofuji, Yoichi; Suyama, Kazuhiko; Nagata, Izumi

    2009-01-01

    Recently, carotid artery stenting (CAS) has gained a lot of interest as a potentially valuable minimally invasive alternative to carotid endarterectomy. Since the occurrence of distal embolization as a result of CAS is still a major concern, an embolus protection device is usually employed during the procedure. Here, we report a case of internal carotid artery (ICA) stenosis complicated with shower embolism during CAS with an embolus protection filter. A 77-year-old man who had a history of coronary bypass surgery was referred to our department for the treatment of carotid artery stenosis. Angiography showed high-grade stenosis at the origin of the right ICA. Plaque magnetic resonance imaging (MRI) showed a hyperintense lesion at the right ICA stenosis, indicating the presence of a lipid-rich plaque. Since cerebral circulation was impaired significantly in the right cerebral hemisphere, CAS was performed for the right ICA stenosis, with an embolus protection filter. A self-expandable stent was placed in the right ICA following predilation. During stenting, plaque protrusion was identified and treated with balloon angioplasty. The patient developed right hemiparesis postoperatively. MRI showed multiple infarction in the right cerebral hemisphere. The symptom resoeved 7 days later. A potential disadvantage of the filter device is incomplete protection from emboli or failure to protect against soluble mediators. An embolus protection filter is not suitable for capturing the debris from lipid-rich plaques.

  12. Lesion-Related Carotid Angioplasty and Stenting with Closed-Cell Design without Embolic Protection Devices in High-Risk Elderly Patients-Can This Concept Work Out? A Single Center Experience Focusing on Stent Design.

    Science.gov (United States)

    Hopf-Jensen, Silke; Marques, Leonardo; Preiß, Michael; Müller-Hülsbeck, Stefan

    2014-12-01

    To compare the performance differences of three carotid artery stents in high-risk elderly patients without embolic protection devices (EPDs) on the basis of stent design, procedure-related complications, conveniences in handling, in-stent restenosis, 30-day outcome, and long-term follow-up. A total of 101 symptomatic internal carotid stenoses of 94 patients were prospectively treated with stent-protected angioplasty to 94 patients. Three closed-cell stents, one of those being hybrid cell design, were chosen depending on vascular anatomy: curved vessel, lesion length > 1 cm: 64 Carotid Wallstent (Boston Scientific, Natick, MA); curved vessel, lesion length  1 cm: 16 Xact (Vascular Abbott, Santa Clara, CA). Comparisons of demographics, procedures, and outcomes were performed. The mean age of patients was 73.1 years (standard deviation [SD], ± 7.9; range, 58-87 years), 71% of the patients were older than 70 years and 20% were octogenarians. Male/female ratio was 3.1:1. About 13.9% (14/101) had contralateral internal carotid artery occlusion. Overall peri-interventional complication rate was 2.9% and 30-day mortality rate was 1%. During the long-term follow-up (34 months, range 1-59) no ipsilateral stroke was documented. Ten deaths (three after MI) were recognized. Two in-stent restenosis were detected (> 70% North American Symptomatic Carotid Endarterectomy Trial) during follow-up, one patient was detected with previous carotid endarterectomy. Especially, if individual anatomical variance is considered, lesion-related stent-protected carotid angioplasty with lesion-adapted closed-cell design is an effective, reliable, safe, and comprehensible treatment option in symptomatic patients. Even without EPDs, the rate of complications is low, when compared with symptomatic carotid artery stenosis described in the literature. In-stent restenosis seems to play no significant role in follow-up.

  13. Radiation beans characterization and implantation for study of lead equivalent individual protection device used in radiodiagnostic practices; Caracterizacao e implantacao de feixes de radiacao para estudo de dispositivos de protecao individual com equivalencia em chumbo utilizados em praticas de radiodiagnostico

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Leslie Silva

    2004-07-01

    The protective shielding (IPC) must be used by occupationally exposed professionals, patients and volunteers, in order to optimize the doses who receive due to radiological practices. International and national norms establish the methodology to be adopted for determination of the IPC attenuation. In this work, the IPC had been submitted to X-rays beams with known characteristics, standardized for determination of their attenuation equivalent thickness by comparison to an experimental lead attenuation slope. This comparison technique allowed insurance estimative of the IPC attenuation equivalent thickness in mm of lead. Thus, it was possible to verify the conformity of the attenuation equivalent thickness determined experimentally and the value of the thickness indicated by the manufacturer. To carry out this work, it was necessary the implementation of experimental setups stated in the specifics norms, the study of the X-rays beams original features and the determination of combined additional filters, in order to allow the X-ray equipment used operates in compliance with Norm IEC 61331-1 IEC. The radiation quality selected is characterized by a 100 kV voltage and a 0.25 mm of copper overall filtration. The implementation of this radiation quality it was carried through of its first and second HVL (Half Value Layer). Thus, a methodology according to the international Norms has been implemented in the laboratory. The results of the present work provide suitable and useful information about radiation beams features related to the determination techniques of the attenuation properties. Once implemented the procedures for conformity evaluation of the protection devices, it will be possible to carry out specific quality control tests, which will be helpful to manufacturers, customers, as well as authorities in the radiological protection and health areas. (author)

  14. Distal tibial interosseous osteochondroma with impending fracture of fibula ? a case report and review of literature

    OpenAIRE

    Wani, Iftikhar H; Sharma, Siddhartha; Malik, Farid H; Singh, Manjeet; Shiekh, Irfan; Salaria, Abdul Q

    2009-01-01

    Osteochondromas arising from the interosseous border of the distal tibia and involving distal fibula are uncommon. We present a 16 year old young boy with an impending fracture, erosion and weakness of the distal fibula, secondary to an osteochondroma arising from the distal tibia. Early excision of this deforming distal tibial osteochondroma avoided the future risk of pathological fracture of the distal fibula, ankle deformities and syndesmotic complications.

  15. Potassium transport across guinea pig distal colon

    International Nuclear Information System (INIS)

    Rechkemmer, G.; Halm, D.R.; Frizzell, R.A.

    1986-01-01

    Active absorption and secretion of K was studied by measuring bidirectional 42 K fluxes across short-circuited guinea pig distal colon. Tissues were pretreated with mucosal (m) and serosal (s) indomethacin (1 μM) and amiloride (0.1 mM, m) to suppress spontaneous, electrogenic Cl secretion and Na absorption. Under these conditions, the short-circuit current (I/sub sc/) was 0.4 μeq/cm 2 h while electroneutral K absorption was 2.8 μeq/cm 2 h. Epinephrine (5 μM, s) stimulated electrogenic K secretion, reducing net K absorption to 1.3 μeq/cm 2 h. Bumetanide (0.1 mM, s) abolished this K secretion and restored K absorption to control values, suggesting mechanistic similarities between K and Cl secretion. K absorption was inhibited 40% by the gastric H/K ATPase inhibitor, omeprazole (0.1 mM, m), and was abolished by ouabain (0.1 mM, m). Neutral K absorption does not appear to be mediated by an apical membrane Na/K pump since: the effect of mucosal ouabain on K absorption does not require the presence of mucosal or serosal Na, unidirectional Na fluxes are not influenced by mucosal ouabain, and K absorption is not affected when Na absorption is abolished by amiloride. Net K transport is determined by the balance between electroneutral K absorption and electrogenic K secretion. The ouabain sensitivity of K absorption suggests that colonic H/K ATPase differs from its gastric counterpart

  16. Histology of the distal dural ring.

    Science.gov (United States)

    Graffeo, Christopher S; Perry, Avital; Copeland, William R; Raghunathan, Aditya; Link, Michael J

    2017-09-01

    The distal dural ring (DDR) is a conserved intracranial anatomic structure marking the boundary point at which the internal carotid artery (ICA) exits the cavernous sinus (CS) and enters the subarachnoid space. Although the CS has been well described in a range of anatomic studies, to our knowledge no prior study has analyzed the histologic relationship between the ICA and DDR. Correspondingly, our objective was to assess the relationship of the DDR to the ICA and determine whether the DDR can be dissected from the ICA and thus divided, or can only be circumferentially trimmed around the artery. The authors examined ten fresh-frozen, adult cadaveric specimens. A standard frontotemporal craniotomy, orbito-optic osteotomy, and extradural anterior clinoidectomy was performed bilaterally. The cavernous ICA, DDR, and supraclinoid ICA were harvested as an en bloc specimen. Specimens formalin-fixed and paraffin-embedded prior to routine histochemical staining with hematoxylin and eosin and Masson trichrome. In all specimens, marked microscopic investment of the DDR throughout the ICA adventitia was noted. Dural collagen fibers extensively permeated the arterial layers superficial to the muscularis propria, with no evidence of a clear separation between the DDR and arterial adventitia. Histologic analysis suggests that the ICA and DDR are highly interrelated, continuous structures, and therefore attempted intraoperative dissection between these structures may carry an elevated risk of injury to the ICA. We correspondingly recommend careful circumferential trimming of the DDR in lieu of direct dissection in cases requiring mobilization of the clinoidal ICA. Clin. Anat. 30:742-746, 2017. © 2017Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

  17. Biocarbon device for cutaneous ureterostomy.

    Science.gov (United States)

    Pow-Sang, J; Ojeda, J; Benavente, V; Pow-Sang, J

    1984-01-01

    The surgical technique for a new alternative to urinary diversion is described. The biocarbon conduit is an inert device implanted in the abdominal wall. Its inner end is anastomosed to the distal ureter, and the outlet is over the abdominal skin and connected to a collector tube into a urinary bag. Twenty implants were performed between March, 1980, and July, 1981. Seventeen patients had carcinoma of the uterine cervix, and 3 had carcinoma of the urinary bladder (age range 34 to 79 years). All had severe urinary tract infection, retrodilation, and were in poor general physical condition. Eight fistulas developed in the 20 implants.

  18. Tritium removal and retention device

    International Nuclear Information System (INIS)

    Boyle, R.F.; Durigon, D.D.

    1980-01-01

    A device is provided for removing and retaining tritium from a gaseous medium, and also a method of manufacturing the device. The device, consists of an inner core of zirconium alloy, preferably Zircaloy-4, and an outer adherent layer of nickel which acts as a selective and protective window for passage of tritium. The tritium then reacts with or is absorbed by the zirconium alloy, and is retained until such time as it is desirable to remove it during reprocessing. (auth)

  19. Case-control study of proximal and distal colon cancer and diet in Wisconsin.

    Science.gov (United States)

    Young, T B; Wolf, D A

    1988-08-15

    The relationship between diet and subsite-specific colon cancer was investigated using dietary histories obtained from a statewide, population-based sample of 152 proximal colon cancer patients, 201 distal colon cancer patients and 618 general population controls. The results do not support hypotheses that (1) dietary fat and cholesterol are more strongly related to proximal colon cancer and (2) vegetables and other dietary sources of fiber are more strongly associated with distal colon cancer. Vegetable consumption over lifetime was consistently protective for both proximal and distal colon cancer. Odds ratios and 95% confidence intervals for the most significant dietary factors (based on high vs. low consumption) for proximal colon cancer were: salad, 0.29 (0.17, 0.48); miscellaneous vegetables, 0.58 (0.35, 0.97); cruciferous vegetables, 0.59 (0.35, 0.97); processed lunchmeat, 2.04 (1.31, 3.17); pan-fried foods, 1.79 (1.15, 2.80); eggs, 1.75 (1.02, 2.99) and for distal colon cancer they were: salad, 0.43 (0.28, 0.67); cruciferous vegetables, 0.44 (0.28, 0.71); cheese, 0.62 (0.40, 0.96); processed lunchmeat, 1.79 (1.17, 2.73); pan-fried foods, 1.55 (1.03, 1.27). The results support recommendations that the "prudent diet" (low-fat, high-vegetable) may reduce colon cancer risk.

  20. Results of preputial reconstruction in 77 boys with distal hypospadias

    NARCIS (Netherlands)

    Klijn, A. J.; Dik, P.; de Jong, T. P.

    2001-01-01

    There is growing interest in preputial reconstruction combined with hypospadias repair. We retrospectively analyzed its results for future developments and patient information. We evaluated 77 boys who underwent distal hypospadias repair combined with preputial reconstruction to determine

  1. Surgical treatment of distal biceps tendon rupture: a case report

    Directory of Open Access Journals (Sweden)

    Cristina N. Cozma

    2017-11-01

    Full Text Available Objectives. Distal biceps tendon rupture affects the functional upperextremity movement, impairing supination and flexion strength. According to age, profession and additional risks treatment might be nonoperative or surgical. Methods. We describe the case of a 43 years old male patient who sustained an injury to his right distal biceps and was diagnosed with acute right distal biceps rupture. Surgical treatment was decided and biceps tendon was reinserted to the radius tuberosity using a combination of a cortical button fixation associated with an interference screw. Results. Postoperative functional result was favorable with no complications and with no movement limitation after one month. Conclusions. When possible, distal biceps tendon repair should be realized surgically because this permits restoring of the muscle strength to near normal levels with no loss of motion. Nerve complications are common; therefore the surgery should be realized by experienced upper extremity surgeons.

  2. Minimally invasive percutaneous plate fixation of distal tibia fractures.

    LENUS (Irish Health Repository)

    Bahari, Syah

    2007-10-01

    We report a series of 42 patients reviewed at a mean of 19.6 months after treatment of distal tibial and pilon fractures using the AO distal tibia locking plate with a minimally invasive percutaneous plate osteosynthesis (MIPPO) technique. Mean time to union was 22.4 weeks. All fractures united with acceptable alignment and angulation. Two cases of superficial infection were noted, with one case of deep infection. Mean SF36 score was 85 and mean AOFAS score was 90 at a mean of 19 months follow-up. We report satisfactory outcomes with the use of the AO distal tibia locking plate in treatment of unstable distal tibial fractures. Eighty-nine percent of the patients felt that they were back to their pre injury status and 95% back to their previous employment.

  3. Distal vertebral artery reconstruction when managing vertebrobasilar insufficiency

    OpenAIRE

    D. M. Galaktionov; A. V. Dubovoy; K. S. Ovsyannikov

    2017-01-01

    This article presents a literature review devoted to the reconstruction of the distal vertebral artery and a clinical case of successful surgical treatment of a patient suffering from vertebrobasilar insufficiency caused by occlusion of the vertebral artery in a proximal segment. The external carotid artery-distal vertebral artery bypass was performed by using the radial artery.Received 27 February 2017. Revised 25 July 2017. Accepted 3 August 2017.Funding: The study did not have sponsorship....

  4. Update on the roles of distal airways in COPD

    Directory of Open Access Journals (Sweden)

    N. Roche

    2011-03-01

    Full Text Available This review is the summary of a workshop on the role of distal airways in chronic obstructive pulmonary disease (COPD, which took place in 2009 in Vence, France. The evidence showing inflammation and remodelling in distal airways and the possible involvement of these in the pathobiology, physiology, clinical manifestations and natural history of COPD were examined. The usefulness and limitations of physiological tests and imaging techniques for assessing distal airways abnormalities were evaluated. Ex vivo studies in isolated lungs and invasive measurements of airway resistance in living individuals have revealed that distal airways represent the main site of airflow limitation in COPD. Structural changes in small conducting airways, including increased wall thickness and obstruction by muco-inflammatory exudates, and emphysema (resulting in premature airway closure, were important determinants of airflow limitation. Infiltration of small conducting airways by phagocytes (macrophages and neutrophils, dendritic cells and T and B lymphocytes increased with airflow limitation. Distal airways abnormalities were associated with patient-related outcomes (e.g. dyspnoea and reduced health-related quality of life and with the natural history of the disease, as reflected by lung function decline and mortality. These data provide a clear rationale for targeting distal airways in COPD.

  5. Aquaporin-4 expression in distal myopathy with rimmed vacuoles.

    Science.gov (United States)

    Hoshi, Akihiko; Yamamoto, Teiji; Kikuchi, Saeko; Soeda, Tomoko; Shimizu, Keiko; Ugawa, Yoshikazu

    2012-04-27

    Distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy is clinically characterized by the early involvement of distal leg muscles. The striking pathological features of the myopathy are muscle fibers with rimmed vacuoles. To date, the role of aquaporin-4 water channel in distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy has not been studied. Here, we studied the expression of aquaporin-4 in muscle fibers of a patient with distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy. Immunohistochemical and immunofluorescence analyses showed that sarcolemmal aquaporin-4 immunoreactivity was reduced in many muscle fibers of the patient. However, the intensity of aquaporin-4 staining was markedly increased at rimmed vacuoles or its surrounding areas and in some muscle fibers. The fast-twitch type 2 fibers were predominantly involved with the strong aquaporin-4-positive rimmed vacuoles and TAR-DNA-binding protein-43 aggregations. Rimmed vacuoles with strong aquaporin-4 expression seen in the distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy patient were not found in control muscles without evidence of neuromuscular disorders and the other disease-controls. Aquaporin-4 might be crucial in determining the survival or degeneration of fast-twitch type 2 fibers in distal myopathy with rimmed vacuoles/hereditary inclusion body myopathy.

  6. Distal biceps brachii tendon rupture resulting in acute compartment syndrome.

    Science.gov (United States)

    Grandizio, Louis C; Suk, Michael; Feltham, Glen T

    2013-11-01

    Distal biceps brachii tendon rupture is an uncommon injury. Compartment syndrome of the upper arm is rarely described in the literature. The diagnosis of upper arm compartment syndrome requires a high index of suspicion, and emergent surgical treatment with fasciotomy in the acute setting is necessary to avoid devastating neurovascular complications. This article reports a case of acute compartment syndrome of the anterior compartment of the upper arm after a complete rupture of the distal biceps brachii tendon. A healthy 45-year-old man presented with increasing arm pain; paresthesia in the lateral antebrachial cutaneous nerve distribution; and a tense, swollen anterior compartment of his upper arm. Side port catheter absolute pressure measurement was 83 mm Hg with a diastolic blood pressure of 92 mm Hg. The patient underwent an emergent fasciotomy and was found to have a complete rupture of his distal biceps brachii tendon. He subsequently underwent distal biceps tendon repair and delayed primary closure of his incision. Postoperatively, his paresthesia improved and he has no neurological deficit. There is a paucity of case reports describing compartment syndrome after rupture of either the proximal or distal end of the biceps brachii tendon, and none of the reports describe compartment syndrome of the upper arm after rupture of the distal biceps tendon. This article highlights an unusual complication of an uncommon injury and reviews diagnostic and treatment principles for the management of acute compartment syndrome of the upper arm. Copyright 2013, SLACK Incorporated.

  7. Endovascular treatment for ruptured distal anterior inferior cerebellar artery aneurysm.

    Science.gov (United States)

    Oh, Jae-Sang; Yoon, Seok-Mann; Shim, Jai-Joon; Bae, Hack-Gun; Yoon, Il-Gyu

    2014-03-01

    A 42-year-old woman presented with Hunt and Hess grade (HHG) III subarachnoid hemorrhage (SAH) caused by a ruptured left distal anterior inferior cerebellar artery (AICA) aneurysm. Computed tomography showed a thin SAH on the cerebellopontine angle cistern, and small vermian intracerebral hemorrhage and intraventricular hemorrhage in the fourth ventricle. Digital subtraction angiography revealed the aneurysm on the postmeatal segment of left distal AICA, a branching point of rostrolateral and caudomedial branch of the left distal AICA. Despite thin caliber, tortuous running course and far distal location, the AICA aneurysm was obliterated successfully with endovascular coils without compromising AICA flow. However, the patient developed left side sensorineural hearing loss postoperatively, in spite of definite patency of distal AICA on the final angiogram. She was discharged home without neurologic sequela except hearing loss and tinnitus. Endovascular treatment of distal AICA aneurysm, beyond the meatal loop, is feasible while preserving the AICA flow. However, because the cochlear hair cell is vulnerable to ischemia, unilateral hearing loss can occur, possibly caused by the temporary occlusion of AICA flow by microcatheter during endovascular treatment.

  8. Endoprosthetic Reconstruction of distal Humerus following Resection of distal Humeral Giant Cell Tumours in Six Patients in Rural India

    Directory of Open Access Journals (Sweden)

    Balasubramanian N

    2017-07-01

    Full Text Available Giant cell tumour is a commonly occurring benign bone tumour in the Indian population. The common sites of involvement in descending order of frequency are distal femur, proximal tibia, distal radius and proximal humerus. The less commonly occurring sites are distal humerus, pelvis and proximal femur. We present six cases of giant cell tumour involving the distal humerus in rural India. After obtaining a tissue diagnosis by Trucut biopsy and classifying using Enneking's classification, we proceeded to perform wide resection followed by endoprosthetic reconstruction using custom mega prosthesis. We present here six patients (M: F: 2: 4 who were managed by us between 2008-2014. They presented to us with pain around the elbow and restriction in range of movements. They were each noted radiographically to have a lytic lesion involving the distal humerus with the likely diagnosis of giant cell tumour. Closed biopsy was done in all of them to obtain a definitive diagnosis. All patients underwent wide resection and reconstruction using distal humerus custom prosthesis. All patients were followed up at 6, 12, 18 and 24 weeks and thereafter six monthly until the last review. They were assessed using the DASH scoring system. All patients were well with no evidence of recurrence with good to fair functional outcome. We conclude that careful pre-operative planning with meticulous soft tissue dissection and good implant metallurgy and design, these tumours can be treated with good long term functional results.

  9. Fusion devices

    International Nuclear Information System (INIS)

    Fowler, T.K.

    1977-01-01

    Three types of thermonuclear fusion devices currently under development are reviewed for an electric utilities management audience. Overall design features of laser fusion, tokamak, and magnetic mirror type reactors are described and illustrated. Thrusts and trends in current research on these devices that promise to improve performance are briefly reviewed. Twenty photographs and drawings are included

  10. PLASMA DEVICE

    Science.gov (United States)

    Gow, J.D.; Wilcox, J.M.

    1961-12-26

    A device is designed for producing and confining highenergy plasma from which neutrons are generated in copious quantities. A rotating sheath of electrons is established in a radial electric field and axial magnetic field produced within the device. The electron sheath serves as a strong ionizing medium to gas introdueed thereto and also functions as an extremely effective heating mechanism to the resulting plasma. In addition, improved confinement of the plasma is obtained by ring magnetic mirror fields produced at the ends of the device. Such ring mirror fields are defined by the magnetic field lines at the ends of the device diverging radially outward from the axis of the device and thereafter converging at spatial annular surfaces disposed concentrically thereabout. (AFC)

  11. Biomechanical analysis of distal biceps tendon repair methods.

    Science.gov (United States)

    Henry, Jon; Feinblatt, Jeff; Kaeding, Christopher C; Latshaw, James; Litsky, Alan; Sibel, Roman; Stephens, Julie A; Jones, Grant L

    2007-11-01

    The 1-incision and 2-incision techniques are commonly used methods to repair a distal biceps rupture, and they differ in the location of reinsertion of tendon into bone. The native distal biceps brachii tendon inserts on the posterior-ulnar aspect of the bicipital tuberosity, which functions as a cam, increasing the tendon's moment arm during its principal action of forearm supination. Repair of the distal biceps tendon to the anterior aspect of the tuberosity compromises forearm supination due to absence of the bicipital tuberosity's cam effect. Controlled laboratory study. Eleven matched pairs of fresh-frozen cadaveric upper extremities were prepared for repair of the distal biceps tendon using either anterior or posterior reattachment with transosseous suture fixation. Specimens were tested on a materials testing machine with intact distal biceps insertion and after repair. A load cell at the distal radial-ulnar joint measured resultant elbow flexion and forearm supination torque produced by 100-N force applied to the proximal aspect of the tendon. Although there was a trend (P= .104) toward loss of supination torque with the anterior reconstruction method, no significant differences in torque (0.80 vs 0.89 N.m) or flexion force (11.87 vs 12.07 N) were found between the anterior and posterior reconstruction techniques. There is no statistically significant difference in flexion force or supination torque between the anterior and posterior reconstruction techniques. This study supports existing limited clinical data suggesting no functional differences exist between 2 common repair methods. Further biomechanical and clinical investigations directly comparing the results of distal biceps tendon repairs made to the anterior aspect versus the posterior aspect of the tuberosity are necessary to definitely determine if differences exist in resultant elbow flexion and forearm supination functions.

  12. Cooling Devices in Laser therapy.

    Science.gov (United States)

    Das, Anupam; Sarda, Aarti; De, Abhishek

    2016-01-01

    Cooling devices and methods are now integrated into most laser systems, with a view to protecting the epidermis, reducing pain and erythema and improving the efficacy of laser. On the basis of method employed, it can be divided into contact cooling and non-contact cooling. With respect to timing of irradiation of laser, the nomenclatures include pre-cooling, parallel cooling and post-cooling. The choice of the cooling device is dictated by the laser device, the physician's personal choice with respect to user-friendliness, comfort of the patient, the price and maintenance costs of the device. We hereby briefly review the various techniques of cooling, employed in laser practice.

  13. Radiation protection measuring device SSM-1

    International Nuclear Information System (INIS)

    Anon.

    1988-01-01

    Product information from the producer on a universal measuring instrument for alpha, beta and gamma radiation designed for stationary and field use by military, police and fire brigades. 4 figs. (qui)

  14. Fractures of the distal radius in children: A retrospective evaluation

    Directory of Open Access Journals (Sweden)

    Selma Yazıcı

    2012-06-01

    Full Text Available Objectives: This study designed to evaluate the resultsof treatment, closed reduction and percutaneous wires, ofthe distal radius fractures in children.Materials and methods: A retrospective analysis wascarried out in children aged between 5-15 years who presentedwith a displaced fracture of the distal radius to ourhospital. They were initially treated with closed reductionand cast immobilization. If the fractures redisplaced treatedby percutaneous Kirschner (K- wire with scope undera general anaesthesia.Results: Totally 104 patients, who have distal radius fractureswere treated by closed reduction and immobilizationin a plaster cast. 13 patient who have distal radiusfractures were treated by closed reduction under generalanaesthesia and fixed by percutaneous Kirschner (K-wire. Patients with impaired the alignment of the fracturein late period were usually completely displaced fractures.(n=5, 4,3%, in early period, completely displaced fractures(n=5, 4,3% are superior to partial displaced fractures(n=2, 1,7%.Conclusion: In our study, when children with distal radiusfracture first come, they were treated by closed reductionand immobilization in a plaster cast. We thought that inredisplaced fractures patients were suitable for the closedreduction with percutaneous wire treatment.

  15. Complications of Minimally Invasive Percutaneous Plating for Distal Tibial Fractures.

    Science.gov (United States)

    Muzaffar, Nasir; Bhat, Rafiq; Yasin, Mohammad

    2016-07-01

    The management of distal tibia fractures continues to remain a source of controversy and debate. The aim of this study was to evaluate the various complications of minimally invasive percutaneous plate osteosynthesis (MIPPO) using a locking plate for closed fractures of distal tibia in a retrospective study. Twenty-five patients with distal tibial fractures, treated by minimally invasive percutaneous plate osteosynthesis, were evaluated in a retrospective study. We studied the rate, probable etiological factors and preventive and corrective measures of various complications associated with minimally invasive plating of distal tibia. Mean age of the patients was 41.16 years (range 22 - 65). There were 13 male and 12 female patients. All fractures united at an average duration of 16.8 weeks. There were two cases of superficial and two cases of deep infection, and deep infections required removal of hardware for cure. There were four cases of ankle stiffness, most of them occurring in intra-articular fractures, three cases of palpable implant, three cases of malunion, one case of loss of reduction and one patient required reoperation. The average AO foot and ankle score was 83.6. We found MIPPO using locking plate to be a safe and effective method for the treatment of distal tibial fractures in properly selected patients yet can result in a variety of complications if proper precautions before, during and after surgery are not taken care of.

  16. Recurrent Giant cell tumour in distal Humerus: A Case report

    Directory of Open Access Journals (Sweden)

    Y Bhanu Rekha

    2013-07-01

    Full Text Available Introduction: Giant cell tumour of bone (GCT is a common benign primary bone tumour, seen commonly in the distal Femur, proximal Tibia and distal Radius. Very few cases of GCT are reported in distal humerus. We report an unusual presentation of recurrent Giant cell tumour in a 25 year old male in the medial condyle and epicondyle of left Humerus. Case Report: Patient presented elsewhere with lytic lesion of left elbow three years ago. As it is an uncommon site for tumors, it was misdiagnosed as tuberculous osteomyelitis and was inadequately curetted. Patient presented to us with recurrence of tumor one year after the primary surgery. We did en-bloc resection of the tumour, with judicious removal of partial trochlea. Though reconstruction was planned, it was found to be not necessary as the elbow was stable per-operatively. Patient regained near normal movements of the elbow with no instability. His Mayo Elbow Performance score improved from 30 to 85.There is no recurrence or metastasis of the tumor in the two-year follow-up. Conclusion: Though bone tumors are rare in distal Humerus, biopsy is needed to confirm the diagnosis of any lytic lesion in this region for proper management. Keywords: Recurrent Giant cell tumor, resection of GCT, GCT distal Humerus.

  17. Optimal location of a single distal interlocking screw in intramedullary nailing of distal third femoral shaft fractures.

    Science.gov (United States)

    George, C J; Lindsey, R W; Noble, P C; Alexander, J W; Kamaric, E

    1998-05-01

    This biomechanical study was done to determine the effect of the level of a single distal screw in a static intramedullary (IM) femoral nail on the stability of fixation of a fracture in the distal third of the femur. Fifteen composite fiberglass femora were osteotomized transversely in the distal third of the femur. A Grosse-Kempf nail was implanted into the femurs, which were divided into three groups of five specimens. Single screw distal nail locking was varied distal to the osteotomy site for each group at 2.5, 5.0, and 7.5 centimeters, respectively. All instrumented femurs were mounted on a servohydraulic testing machine and fitted with transducers to measure axial, rotational, and bending displacements. Specimens were cyclically loaded (one hertz) in simultaneous torsion (moment: +/- 10 newton-meters) and axial compression (amplitude: 2,000 newtons) for 500 cycles with a 250-pound abductor force. Data from linear and rotational transducers were sampled at 100 hertz for five cycles before cycling, every 100 cycles of loading, and immediately after cycling. Custom computer software was developed to convert transducer signals into static and dynamic measurements of axial motion (in millimeters), rotation (in degrees), and angulation (in degrees). Osteotomy site dynamic rotation increased significantly in specimens locked at 7.5 centimeters when compared with the 2.5-centimeter group. There was minimal difference between the stability of the 5.0-centimeter and 7.5-centimeter groups. There was no significant change in position at the fracture site before or after cyclic loading with respect to axial shortening, rotation, or bending. Both dynamic axial and angular displacements were also unaffected by screw position. The location of a single distal interlocking screw in static IM nail fixation of distal third femur fractures can significantly affect rotational stability but not axial or angular fixation.

  18. 21 CFR 820.130 - Device packaging.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Device packaging. 820.130 Section 820.130 Food and... QUALITY SYSTEM REGULATION Labeling and Packaging Control § 820.130 Device packaging. Each manufacturer shall ensure that device packaging and shipping containers are designed and constructed to protect the...

  19. Percutaneous pins versus volar plates for unstable distal radius fractures: a biomechanic study using a cadaver model.

    Science.gov (United States)

    Knox, Jeffrey; Ambrose, Heidi; McCallister, Wren; Trumble, Thomas

    2007-01-01

    A biomechanic study using a cadaver model of a dorsally unstable distal radius fracture was used to compare the stability of percutaneous pinning and volar fixed-angle plating. Among the many surgical options for treating distal radius fractures are percutaneous pinning and internal plate fixation. Although percutaneous pin fixation requires less soft-tissue trauma and has low complication rates, plate fixation allows for early active movement with good clinical results. The biomechanic stability of these 2 methods was studied by using a cadaver model of a dorsally unstable intra-articular distal radius fracture. This study was performed on 7 fresh-frozen cadaver arms, in each of which an unstable intra-articular fracture with dorsal comminution was created. The fracture was first fixed with 0.062-mm K-wires inserted in standard crossed fashion and was tested in a pneumatic loading device that indirectly loaded the wrists through the 5 motor tendons 3 times at each level of force in flexion and extension. Testing was then repeated after removal of the pins and fixation with a fixed-angle DVR distal volar radius plate system (Hand Innovations, Inc., Miami, FL). Testing was performed in flexion up to 68 N and in extension up to 100 N, and the distance across the fracture site was measured. Volar plating was significantly more stable than pinning, with an average movement across the fracture site of 2.51 mm for pin fixation and 1.07 mm for plate fixation. The pins also showed a substantial degree of slipping after repeated stressing, but the plates remained stable. These results show the superior biomechanic stability of internal fixation using plates for dorsally comminuted intra-articular distal radius fractures in this cadaver model. Further clinical correlations are needed.

  20. Laparoscopic versus open distal pancreatectomy for pancreatic cancer.

    Science.gov (United States)

    Riviere, Deniece; Gurusamy, Kurinchi Selvan; Kooby, David A; Vollmer, Charles M; Besselink, Marc G H; Davidson, Brian R; van Laarhoven, Cornelis J H M

    2016-04-04

    Surgical resection is currently the only treatment with the potential for long-term survival and cure of pancreatic cancer. Surgical resection is provided as distal pancreatectomy for cancers of the body and tail of the pancreas. It can be performed by laparoscopic or open surgery. In operations on other organs, laparoscopic surgery has been shown to reduce complications and length of hospital stay as compared with open surgery. However, concerns remain about the safety of laparoscopic distal pancreatectomy compared with open distal pancreatectomy in terms of postoperative complications and oncological clearance. To assess the benefits and harms of laparoscopic distal pancreatectomy versus open distal pancreatectomy for people undergoing distal pancreatectomy for pancreatic ductal adenocarcinoma of the body or tail of the pancreas, or both. We used search strategies to search the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, Science Citation Index Expanded and trials registers until June 2015 to identify randomised controlled trials (RCTs) and non-randomised studies. We also searched the reference lists of included trials to identify additional studies. We considered for inclusion in the review RCTs and non-randomised studies comparing laparoscopic versus open distal pancreatectomy in patients with resectable pancreatic cancer, irrespective of language, blinding or publication status.. Two review authors independently identified trials and independently extracted data. We calculated odds ratios (ORs), mean differences (MDs) or hazard ratios (HRs) along with 95% confidence intervals (CIs) using both fixed-effect and random-effects models with RevMan 5 on the basis of intention-to-treat analysis when possible. We found no RCTs on this topic. We included in this review 12 non-randomised studies that compared laparoscopic versus open distal pancreatectomy (1576 participants: 394 underwent laparoscopic distal pancreatectomy and 1182

  1. Sealing devices

    International Nuclear Information System (INIS)

    Coulson, R.A.

    1980-01-01

    A sealing device for minimising the leakage of toxic or radioactive contaminated environments through a biological shield along an opening through which a flexible component moves that penetrates the shield. The sealing device comprises an outer tubular member which extends over a length not less than the maximum longitudinal movement of the component along the opening. An inner sealing block is located intermediate the length of the component by connectors and is positioned in the bore of the outer tubular member to slide in the bore and effect a seal over the entire longitudinal movement of the component. The cross-section of the device may be circular and the block may be of polytetrafluoroethylene or of nylon impregnated with molybdenum or may be metallic. A number of the sealing devices may be combined into an assembly for a plurality of adjacent longitudinally movable components, each adapted to sustain a tensile load, providing the various drives of a master-slave manipulator. (author)

  2. [Repair of distal biceps brachii tendon rupture: a case report].

    Science.gov (United States)

    Oztürk, Kahraman; Sahin, Vedat

    2002-01-01

    The rupture of the distal tendon of the biceps brachii muscle is a rarely encountered injury, causing flexion and supination losses. There are literature reports giving good results with the use of two-incision technique that fixes the distal biceps brachii tendon to the radial tuberosity. We used this technique in a 49-year-old male patient who had had left distal tendinous rupture of the biceps brachii muscle caused by lifting heavy weight. Functional evaluation at the end of 16 months with the use of the Cybex 350 test machine showed normal range of motions for flexion and extension in the left elbow. There was a 25 percent loss of strength and 5 percent loss of endurance in flexion, and 11 percent loss of endurance in pronation. No complications were observed and a very good functional result was achieved.

  3. [Proximal and distal rupture of the m. biceps brachii].

    Science.gov (United States)

    Lorbach, O; Kieb, M; Grim, C; Engelhardt, M

    2010-12-01

    Ruptures of the biceps tendon account for a high percentage of tendon ruptures. The aetiology of proximal ruptures of the long head of the biceps tendon is often degenerative and they are frequently associated with lesions of the rotator cuff. The clinical findings are often not specific and long lasting. Distal ruptures of the biceps tendon mostly occur during eccentric contraction of the biceps muscle.Clinical tests, the associated haematoma and a distalisation or proximalisation of the muscle belly in combination with ultrasound or MRI to rule out combined diseases lead to the diagnosis. The possible options include conservative and operative treatment. Tenotomy and tenodesis lead to comparable results in the literature. Therefore, conservative treatment is mostly recommended in proximal ruptures. Operative treatment is preferred in distal ruptures of the biceps tendon in order to achieve an anatomical reconstruction of the muscle function. Chronic ruptures of the distal biceps tendon can be successfully treated with free autografts or allografts.

  4. Surgical Management of Fossa Navicularis and Distal Urethral Strictures.

    Science.gov (United States)

    Daneshvar, Michael; Hughes, Michael; Nikolavsky, Dmitriy

    2018-04-17

    Urethral reconstruction has evolved in the last several decades with the introduction of various techniques including fasciocutaneous skin flaps and buccal mucosal grafts. However, distal urethral strictures have continued to be a reconstructive challenge due to tendency for adverse cosmetic outcomes, risks of glans dehiscence or fistula formation, and stricture recurrence. The surgical options for treatment of distal urethral strictures have changed throughout the years; however, there is no one universally accepted technique for their treatment. The current trend for treatment is shifting away from multi-staged procedures or the use of local skin flaps to single-stage transurethral procedures that utilize buccal mucosa with glans preservation. This chapter will describe the evolution of distal urethral stricture treatments tracking gradual improvements and modifications over time. The different interventions include transurethral approaches, such as dilations and visual urethrotomy, meatotomy, and meatoplasty/urethroplasty techniques including genital skin flaps and single- and double-stage repairs with buccal mucosal grafts.

  5. Giant Cell Tumour of the Distal Ulna: A Rare Presentation

    Directory of Open Access Journals (Sweden)

    Ruben Jaya Kumar

    2011-07-01

    Full Text Available Giant-cell tumour (GCT of bone, a primary yet locally aggressive benign tumour, commonly affects patients between the ages of 20 and 40 years, with the peak incidence occurring in the third decade. Women are affected slightly more than men. The distal end of the ulna is an extremely uncommon site for primary bone tumours in general and giant cell tumours in particular. Wide resection of the distal ulna is the recommended treatment for GCT in such locations. Radio-ulna convergence and dorsal displacement of the ulna stump are known complications following ulna resection proximal to the insertion of the pronator quadratus. This leads to reduction in grip power and forearm rotatory motion. Stabilization of the ulna stump with extensor carpi ulnaris (ECU tendon after wide resection of the tumour has been described in the literature. We report a case of GCT of distal end of ulna treated with wide resection and stabilization with ECU tendon.

  6. Distal mycotic aneurysm of the AICA mimicking intracanalicular acoustic neuroma.

    Science.gov (United States)

    DiMaio, Salvatore; Mohr, Gérard; Dufour, Jean-Jacques; Albrecht, Steffan

    2003-11-01

    Among cases of cerebellopontine angle lesions, vascular lesions involving the internal auditory canal are extremely rare. We report a distal fusiform mycotic pseudoaneurysm of the anterior inferior cerebellar artery (AICA) that simulated an acoustic neuroma on presentation. A 60-year-old woman was investigated for recent onset of acute dizziness. Laboratory and radiographic investigations are presented, as well as the surgical management of the patient and pathological examination of the aneurysm. An exceptionally rare case of distal mycotic intracanalicular pseudoaneurysm of the AICA with intraluminal thrombus and fusiform anatomy is described. In our review of the literature (1966-present), only five other intracanalicular AICA-aneurysms were encountered, none of which were infectious in etiology. The possible pathophysiologic mechanisms of distal AICA-aneurysms are discussed along with the currently available literature.

  7. Fractures of the distal tibia treated with polyaxial locking plating.

    Science.gov (United States)

    Gao, Hong; Zhang, Chang-Qing; Luo, Cong-Feng; Zhou, Zu-Bin; Zeng, Bing-Fang

    2009-03-01

    We evaluated the healing rate, complications, and functional outcomes in 32 adult patients with very short metaphyseal fragments in fractures of the distal tibia treated with a polyaxial locking system. The average distance from the distal extent of the fracture to the tibial plafond was 11 mm. All fractures healed and the average time to union was 14 weeks. Six patients (19%) reported occasional local disturbance over the medial malleolus. There were two cases of postoperative superficial infections and evidence of delayed wound healing. Using the American Orthopaedic Foot and Ankle Society ankle score, the average functional score was 87.3 points (of 100 total possible points). Our results show the polyaxial locking plates, which offer more fixation versatility, may be a reasonable treatment option for distal tibia fractures with very short metaphyseal segments.

  8. Ferroelectric devices

    CERN Document Server

    Uchino, Kenji

    2009-01-01

    Updating its bestselling predecessor, Ferroelectric Devices, Second Edition assesses the last decade of developments-and setbacks-in the commercialization of ferroelectricity. Field pioneer and esteemed author Uchino provides insight into why this relatively nascent and interdisciplinary process has failed so far without a systematic accumulation of fundamental knowledge regarding materials and device development.Filling the informational void, this collection of information reviews state-of-the-art research and development trends reflecting nano and optical technologies, environmental regulat

  9. Catalytic devices

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Ming; Zhang, Xiang

    2018-01-23

    This disclosure provides systems, methods, and apparatus related to catalytic devices. In one aspect, a device includes a substrate, an electrically insulating layer disposed on the substrate, a layer of material disposed on the electrically insulating layer, and a catalyst disposed on the layer of material. The substrate comprises an electrically conductive material. The substrate and the layer of material are electrically coupled to one another and configured to have a voltage applied across them.

  10. Minimally Invasive Distal Pancreatectomy: Review of the English Literature.

    Science.gov (United States)

    Wang, Kai; Fan, Ying

    2017-02-01

    Recently, the superiority of the minimally invasive approach, which results in a better cosmetic result, faster recovery, and shorter length of hospital stay, is a technique that has been progressively recognized as it has developed. And the minimally invasive approach has been applied to distal pancreatectomy (DP), which is a standard method for the treatment of benign, borderline, and part of malignant lesions of the pancreatic body and tail. This article aims to analyze the types, postoperative recovery, and outcomes of laparoscopic distal pancreatectomy (LDP). A systematic search of the scientific literature was performed using PubMed, EMBASE, online journals, and the Internet for all publications on LDP. Articles were selected if the abstract contained patients who underwent LDP for pancreatic diseases. All selected articles were reviewed and analyzed. If there were no contraindications for LDP, this operation is suitable for benign, borderline, or malignant tumors of the pancreatic body and tail, which should try to be performed with preservation of the spleen. LDP is safe and feasible under some conditions to experienced surgeon. Single-incision laparoscopic distal pancreatectomy (S-LDP) and robotic laparoscopic distal pancreatectomy (R-LDP) perioperative outcomes are similar with conventional multi-incision laparoscopic distal pancreatectomy (C-LDP). And the advantages of S-LDP and R-LDP require further exploration. With the application of enhanced recovery program (ERP), length of hospital stay and costs are reduced. LDP is safe and feasible under some conditions. Compared with open distal pancreatectomy, LDP has a lot of advantages; a trend was observed for LDP to replace traditional open surgery. LDP combined with ERP is expected to become standard in the treatment of pancreatic body and tail lesions.

  11. Laparoscopic distal pancreatectomy for adenocarcinoma: safe and reasonable?

    Science.gov (United States)

    Postlewait, Lauren M.

    2015-01-01

    As a result of technological advances during the past two decades, surgeons now use minimally invasive surgery (MIS) approaches to pancreatic resection more frequently, yet the role of these approaches for pancreatic ductal adenocarcinoma resections remains uncertain, given the aggressive nature of this malignancy. Although there are no controlled trials comparing MIS technique to open surgical technique, laparoscopic distal pancreatectomy for pancreatic adenocarcinoma is performed with increasing frequency. Data from retrospective studies suggest that perioperative complication profiles between open and laparoscopic distal pancreatectomy are similar, with perhaps lower blood loss and fewer wound infections in the MIS group. Concerning oncologic outcomes, there appear to be no differences in the rate of achieving negative margins or in the number of lymph nodes (LNs) resected when compared to open surgery. There are limited recurrence and survival data on laparoscopic compared to open distal pancreatectomy for pancreatic adenocarcinoma, but in the few studies that assess long term outcomes, recurrence rates and survival outcomes appear similar. Recent studies show that though laparoscopic distal pancreatectomy entails a greater operative cost, the associated shorter length of hospital stay leads to decreased overall cost compared to open procedures. Multiple new technologies are emerging to improve resection of pancreatic cancer. Robotic pancreatectomy is feasible, but there are limited data on robotic resection of pancreatic adenocarcinoma, and outcomes appear similar to laparoscopic approaches. Additionally fluorescence-guided surgery represents a new technology on the horizon that could improve oncologic outcomes after resection of pancreatic adenocarcinoma, though published data thus far are limited to animal models. Overall, MIS distal pancreatectomy appears to be a safe and reasonable approach to treating selected patients with pancreatic ductal

  12. 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

  13. Current concepts in the treatment of distal radial fractures.

    Science.gov (United States)

    Ruch, David S; Weiland, Andrew J; Wolfe, Scott W; Geissler, William B; Cohen, Mark S; Jupiter, Jesse B

    2004-01-01

    Surgical indications for the treatment of distal radial fractures are evolving. It is important to identify the various articular fragments and their significance to facilitate optimal surgical treatment of these fragments from the standpoint of both internal and external fixation. New techniques in the visualization and stabilization of the articular surface and the treatment of defects in the metaphysis, including the use of cement to buttress the articular surface, have been brought to the forefront. A treatment algorithm for associated injuries to the distal radioulnar joint is also helpful.

  14. Neglected Distal Humeral Epiphyseal Injury - Two Case Reports

    Directory of Open Access Journals (Sweden)

    Dr. Pankaj Kumar

    2008-07-01

    Full Text Available Distal humeral epiphyseal separation is an uncommon injury in children, which can be missed or misdiagnosed at initial presentation. Awareness of this injury and appropriate radiological assessment helps in proper management. Neglected cases because of inappropriate diagnosis can result in cubitus varus deformity. Full range of movements of elbow can be achieved if properly diagnosed and managed. We present two cases of neglected distal humeral epiphyseal injury in children that resulted in cubitus varus deformity in one case. Full range of movements was achieved in both cases after proper management.

  15. Galeazzi fracture with volar dislocation of the distal radioulnar joint.

    Science.gov (United States)

    Kim, Suezie; Ward, James P; Rettig, Michael E

    2012-11-01

    Galeazzi fracture dislocations are fractures of the distal one-third of the radial diaphysis with traumatic disruption of the distal radioulnar joint (DRUJ). This injury results in subluxation or dislocation of the ulnar head. We present a case of a Galeazzi fracture with a volar dislocation of the DRUJ. Open reduction of the DRUJ with Kirschner wire fixation in pronation was necessary to reduce the joint and maintain anatomic alignment. Repair of the triangular fibrocartilage complex was also necessary to maintain stability of the DRUJ.

  16. External Fixation of Unstable Distal Radius Fracture. A Case Report

    OpenAIRE

    Yaniel Truffin Rodríguez; Rafael Esmandy Gámez Arregoitía; Indira L. Gómez Gil; José Julio Requeiro Morejón

    2014-01-01

    Unstable fracture of the distal radius is a common injury. If not properly treated, it can cause major disturbance in the radiocarpal joint and impaired hand function. A case of a 42-year-old patient of rural origin without a history of previous conditions treated at the Gustavo Aldereguía Lima Hospital in Cienfuegos is presented. He suffered a fall on the outstretched hand, which led to an unstable fracture of the left distal radius. Emergency surgery consisting of manual fracture reduction ...

  17. Traumatisk distal humerus-epifysiolyse hos nyfødt

    DEFF Research Database (Denmark)

    Al-Aubaidi, Zaid; Nielsen, Keld Daubjerg

    2010-01-01

    Traumatic distal humerus epiphysiolysis (TDHE) is a rare injury in infants with an incidence of about 1:35,000 births. It is primarily a birth injury, but it is also seen in cases of battered child syndrome. Because of its rare occurrence and the diagnostic difficulties, the lesion may be overloo......Traumatic distal humerus epiphysiolysis (TDHE) is a rare injury in infants with an incidence of about 1:35,000 births. It is primarily a birth injury, but it is also seen in cases of battered child syndrome. Because of its rare occurrence and the diagnostic difficulties, the lesion may...

  18. Osteoblastoma-like osteosarcoma of the distal tibia

    Energy Technology Data Exchange (ETDEWEB)

    Abramovici, Luigia; Steiner, German C. [Department of Pathology and Laboratory Medicine, Hospital for Joint Diseases, New York, NY (United States); Kenan, Samuel [Department of Orthopaedic Oncology Surgery, Hospital for Joint Diseases, New York, NY (United States); Hytiroglou, Prodromos [Aristotle University, Thessaloniki (Greece); Rafii, Mahvash [Department of Radiology, Hospital for Joint Diseases, New York, NY (United States)

    2002-03-01

    We report a case of a 14-year-old boy with an intracompartmental lytic lesion with poorly defined margins in the right distal tibia that was originally treated with curettage and bone grafting. Histologic examination showed an osteoblastic tumor with unusual features, which was found on consultation to be an osteoblastoma-like osteosarcoma, a rare, low-grade variant of osteosarcoma. Subsequently, the patient underwent en bloc resection of the distal tibia, which was replaced with vascularized bone graft and followed by chemotherapy. Two years later, he is alive with lung metastases. (orig.)

  19. Distal vertebral artery reconstruction when managing vertebrobasilar insufficiency

    Directory of Open Access Journals (Sweden)

    D. M. Galaktionov

    2017-11-01

    Full Text Available This article presents a literature review devoted to the reconstruction of the distal vertebral artery and a clinical case of successful surgical treatment of a patient suffering from vertebrobasilar insufficiency caused by occlusion of the vertebral artery in a proximal segment. The external carotid artery-distal vertebral artery bypass was performed by using the radial artery.Received 27 February 2017. Revised 25 July 2017. Accepted 3 August 2017.Funding: The study did not have sponsorship.Conflict of interest: The authors declare no conflict of interest. 

  20. Distal renal tubular acidosis and amelogenesis imperfecta: A rare association

    Directory of Open Access Journals (Sweden)

    P Ravi

    2013-01-01

    Full Text Available Renal tubular acidosis (RTA is characterized by a normal anion gap with hyperchloremic metabolic acidosis. Primary distal RTA (type I is the most common RTA in children. Childhood presentation of distal RTA includes vomiting, failure to thrive, metabolic acidosis, and hypokalemia. Amelogenesis imperfecta (AI represents a condition where the dental enamel and oral tissues are affected in an equal manner resulting in the hypoplastic or hypopigmented teeth. We report a 10-year-old girl, previously asymptomatic presented with the hypokalemic paralysis and on work-up found out to have type I RTA. The discoloration of teeth and enamel was diagnosed as AI.

  1. Imaging of the Proximal and Distal Radioulnar Joints.

    Science.gov (United States)

    Ehman, Eric C; Felmlee, Joel P; Frick, Matthew A

    2015-08-01

    The proximal and distal radioulnar joints form a unique articular arrangement between the radius and ulna, allowing pivot motion of the forearm and positioning the hand in space. Typically imaged in conjunction with the elbow, radiographs, computed tomography (CT), and MR imaging of the proximal radioulnar joint contribute unique diagnostic information. Because dysfunction of the distal radioulnar joint is often a result of instability, dynamic CT protocols stressing the joint in addition to anatomic imaging with radiographs and MR imaging is valuable. Detailed knowledge of the patient's clinical condition and careful selection of imaging protocols will maximize the benefits. Copyright © 2015 Elsevier Inc. All rights reserved.

  2. Screening renal stone formers for distal renal tubular acidosis

    DEFF Research Database (Denmark)

    Osther, P J; Hansen, A B; Røhl, H F

    1989-01-01

    A group of 110 consecutive renal stone formers were screened for distal renal tubular acidosis (RTA) using morning fasting urinary pH (mfUpH) levels followed by a short ammonium chloride loading test in patients with levels above 6.0. In 14 patients (12.7%) a renal acidification defect was noted...... RTA in renal stone formers. Regardless of whether the acidification defect is primary or secondary to stone formation, however, all renal stone formers with distal RTA can expect to benefit from prophylactic alkaline therapy and it is recommended that the screening procedure, which is easy to use...

  3. Proximal to distal approach in the treatment of tandem occlusions causing an acute stroke.

    Science.gov (United States)

    Spiotta, Alejandro M; Lena, Jonathan; Vargas, Jan; Hawk, Harris; Turner, Raymond D; Chaudry, M Imran; Turk, Aquilla S

    2015-03-01

    A tandem occlusion is a rare presentation of acute stroke that involves an occlusion of the internal carotid artery at the bifurcation with an intracranial middle cerebral artery occlusion. This study describes the experience at our institution in treating tandem occlusions with a proximal to distal approach in the acute stroke setting. A retrospective review of acute strokes caused by tandem occlusions requiring thrombectomy were performed. 16 cases were identified with a mean National Institutes of Health Stroke Scale score at presentation of 13.1 ± 3.9. The proximal occlusion was crossed initially with a microwire in all cases. All carotid occlusions were treated with stenting, and intracranial vessel thrombectomy was performed with a variety of devices. Procedure related complications occurred in two (12.5%) patients. Eight patients (50%) achieved a good outcome (modified Rankin Scale score of 0-2). A tandem occlusion of the carotid artery at the bifurcation with a concomitant intracranial occlusion is a relatively rare and complex presentation of acute stroke. We have found that addressing the proximal lesion first and covering it with a stent prior to performing distal thrombectomy appears to be a safe and effective option in the treatment algorithm. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  4. MR-compatible laparoscope with a distally mounted CCD for MR image-guided surgery

    Energy Technology Data Exchange (ETDEWEB)

    Yasunaga, Takefumi; Konishi, Kozo; Yamaguchi, Shohei; Okazaki, Ken; Hong, Jae-sung; Nakashima, Hideaki [Kyushu University, Department of Advanced Medical Initiatives, Faculty of Medical Sciences, Fukuoka (Japan); Ieiri, Satoshi; Tanoue, Kazuo [Kyushu University Hospital, Department of Advanced Medicine and Innovative Technology, Fukuoka (Japan); Fukuyo, Tsuneo [Shinko Optical Co. Ltd, Bunkyo-ku, Tokyo (Japan); Hashizume, Makoto [Kyushu University, Department of Advanced Medical Initiatives, Faculty of Medical Sciences, Fukuoka (Japan); Kyushu University Hospital, Department of Advanced Medicine and Innovative Technology, Fukuoka (Japan)

    2007-06-15

    Objects We have developed a new MR-compatible laparoscope that incorporates a distally mounted charge-coupled device (CCD). The MR-compatibility and feasibility of laparoscopy using the new laparoscope were evaluated during MR image-guided laparoscopic radiofrequency ablation therapy (RFA). Materials and methods MR compatibility of the laparoscope was investigated in terms of MR image artifact caused by electromagnetic interference (EMI) and susceptibility. MR images were obtained using spin echo and gradient echo pulse sequences with a 0.3 T open MRI unit. We performed an in vivo experiment with MR image-guided laparoscopic RFA on three pigs; near real-time MR images and 3-D navigation were possible using intraoperative MR images. Agarose gel was injected into the pigs' livers as puncture targets; the diameter of each target was approximately 20 mm. Results Artifacts resulting from EMI were not found in phantom experiments. MR image-guided laparoscopic RFA was successfully performed in all procedures. Both the laparoscopic vision and near real-time MR images were clear. No artifact was detected on the MR images and the surgeon was able to confirm the true position of the probe and target during treatment using the near real-time MR images. Conclusion Laparoscopic surgery is feasible under intraoperative MR image-guidance using a newly developed MR-compatible laparoscope with a distally mounted CCD. (orig.)

  5. Treatment of distal tibia metaphyseal fractures; plating versus intramedullary nailing: a systematic review of recent evidence.

    Science.gov (United States)

    Iqbal, H J; Pidikiti, P

    2013-09-01

    Treatment of distal tibia metaphyseal fractures is challenging. The purpose of this study was to systematically review the recent literature regarding management of extra-articular distal tibia fractures with a view to compare the outcome of intramedullary nailing with plate fixation. Advanced literature search was performed using Medline (Ovid), Embase (Ovid) and Cochrane databases. Data were extracted regarding number of participants, fracture fixation devices, percentage of open fractures, malunions, nonunions, wound infections and metal removal etc. After inclusion, exclusion criteria, two RCTs and four retrospective comparative studies were deemed suitable for this review. The overall results showed relatively higher rate of infection in plating group as compared to intramedullary nailing. However malalignment was more common with intramedullary nailing. Both techniques can provide adequate treatments in appropriately selected patients. None of the studies had sufficient power to show clinically significant difference. Further studies are required to compare new locking plates with intramedullary nails. Copyright © 2013 European Foot and Ankle Society. Published by Elsevier Ltd. All rights reserved.

  6. CFD modeling of catheter-based Chemofilter device for filtering chemotherapy drugs from venous flow

    Science.gov (United States)

    Maani, Nazanin; Yee, Daryl; Nosonovsky, Michael; Greer, Julia; Hetts, Steven; Rayz, Vitaliy

    2017-11-01

    Purpose: Intra-arterial chemotherapy, a procedure where drugs are injected into arteries supplying a tumor, may cause systemic toxicity. The Chemofilter device, deployed in a vein downstream of the tumor, can chemically filter the excessive drugs from the circulation. In our study, CFD modeling of blood flow through the Chemofilter is used to optimize its hemodynamic performance. Methods:The Chemofilter consists of a porous membrane attached to a stent-like frame of the RX Accunet distal protection filters used for capturing blood clots. The membrane is formed by a lattice of symmetric micro-cells. This design provides a large surface area for the drug binding, and allows blood cells to pass through the lattice. A two-scale modeling approach is used, where the flow through individual micro-cells is simulated to determine the lattice permeability and then the entire device is modeled as a porous membrane. Results: The simulations detected regions of flow stagnation and recirculation caused by the membrane and its supporting frame. The effect of the membrane's leading angle on the velocity and pressure fields was determined. The device optimization will help the efficacy of drug absorption, while the risk of blood clotting reduces. NIH NCI R01CA194533.

  7. Lightning protection of PV systems

    OpenAIRE

    Pons, Enrico; Tommasini, Riccardo

    2013-01-01

    Lightning strikes can affect photovoltaic (PV) generators and their installations, involving also the inverter's electronics. It is therefore necessary to evaluate the risk connected to lightning strikes in order to adopt the correct protective measures for the system. The Standard IEC (EN) 62305-2 reports the procedures for the risk calculation and for the choice of proper lightning protection systems. Usually the technical guidelines suggest protecting with SPDs (surge protective devices) b...

  8. Preventive Long-Term Effects of a Topical Film-Forming Medical Device with Ultra-High UV Protection Filters and DNA Repair Enzyme in Xeroderma Pigmentosum: A Retrospective Study of Eight Cases

    Directory of Open Access Journals (Sweden)

    Sandra Giustini

    2014-09-01

    Full Text Available Skin cancer is common in xeroderma pigmentosum (XP due to a DNA repair mechanisms genetic defect. Ultraviolet (UV exposure is the main cause of increased incidence of actinic keratosis (AK, basal cell carcinoma (BCC and squamous cell carcinoma (SCC observed in XP subjects. Photoprotection is therefore a mandatory strategy in order to reduce skin damage. A topical DNA repair enzyme has been shown to slow down the development of skin lesions in XP. However, there are no data regarding the effects of photoprotection combined with DNA repair strategies in this clinical setting. A film-forming medical device containing the DNA repair enzyme photolyase and very high-protection UV filters (Eryfotona AK-NMSC, Ery is currently available. We report retrospective data regarding the use of Ery in 8 patients (5 women, 3 men with a diagnosis of XP treated for at least 12 consecutive months, comparing the rate of new skin lesions (AK, BCC and SCC during active treatment with Ery and during 12 months just before the use of the product. New AK, BCC and SCC mean lesion numbers during the 1-year Ery treatment were 5, 3 and 0, respectively in comparison with 14, 6.8 and 3 lesions, respectively during the 1-year pre-treatment period. Ery use was associated with a 65% reduction in appearance of new AK lesions and with 56 and 100% reductions in the incidence of new BCC and SCC lesions, respectively. These data suggest that topical use of photoprotection and DNA repair enzyme could help lower skin cancer lesions in XP. Control prospective trials are advisable in this clinical setting.

  9. MOBILE DEVICES AND EFFECTIVE INFORMATION SECURITY

    OpenAIRE

    Igor Bernik; Blaž Markelj

    2013-01-01

    Rapidly increasing numbers of sophisticated mobile devices (smart phones, tab computers, etc.) all over the world mean that ensuring information security will only become a more pronounced problem for individuals and organizations. It’s important to effectively protect data stored on or accessed by mobile devices, and also during transmission of data between devices and between device and information system. Technological and other trends show, that the cyber threats are also rapidly developi...

  10. Instrument comprising a cable or tube provided provided with a propulsion device

    NARCIS (Netherlands)

    Breedveld, P.

    2006-01-01

    The invention relates to an instrument (1) comprising a cable or tube (3), at a distal end of which a propulsion device (4) is provided for moving the cable or tube in a hollow space, the propulsion device being shaped like a donut lying in a plane at right angles to the longitudinal direction of

  11. Reinforcing the role of the conventional C-arm - a novel method for simplified distal interlocking

    Directory of Open Access Journals (Sweden)

    Windolf Markus

    2012-01-01

    .018. Conclusions In an experimental setting, the newly developed guided freehand technique for distal interlocking has proven to markedly reduce radiation exposure when compared to the conventional freehand technique. The method utilizes established clinical workflows and does not require cost intensive add-on devices or extensive training. The underlying principle carries potential to assist implant positioning in numerous other applications within orthopedics and trauma from screw insertions to placement of plates, nails or prostheses.

  12. Guide device

    International Nuclear Information System (INIS)

    Brammer, C.M. Jr.

    1977-01-01

    Disclosed is a fuel handling guide tube centering device for use in nuclear reactors during fuel assembly handling operations. The device comprises an outer ring secured to the flange of a nuclear reactor pressure vessel, a rotatable table rotatably coupled to the outer ring, and a plurality of openings through the table. Truncated locating cones are positioned in each of the openings in the table, and the locating cones center the guide tube during fuel handling operations. The openings in the table are located such that each fuel assembly in the nuclear core may be aligned with one of the openings by a suitable rotation of the table. The locating cones thereby provide alignment between the fuel handling mechanism located in the guide tube and the individual fuel assemblies of the cone. The need for a device to provide alignment is especially critical for floating nuclear power plants, where wave motion may exist during fuel handling operations. 5 claims, 4 figures

  13. Identification device

    Science.gov (United States)

    Lin, Jian-Shian; Su, Chih-Chieh; Chou, Ta-Hsin; Wu, Mount-Learn; Lai, Chieh-Lung; Hsu, Che-Lung; Lan, Hsiao-Chin; Huang, Hung-I.; Liu, Yung-Chih; Tu, Zong-Ru; Lee, Chien-Chieh; Chang, Jenq-Yang

    2007-09-01

    In this Letter, the identification device disclosed in the present invention is comprised of: a carrier and a plurality of pseudo-pixels; wherein each of the plural pseudo-pixels is formed on the carrier and is further comprised of at least a light grating composed of a plurality of light grids. In a preferred aspect, each of the plural light grids is formed on the carrier while spacing from each other by an interval ranged between 50nm and 900nm. As the aforesaid identification device can present specific colors and patterns while it is being viewed by naked eye with respect to a specific viewing angle, the identification device is preferred for security and anti-counterfeit applications since the specific colors and patterns will become invisible when it is viewed while deviating from the specific viewing angle.

  14. RF and dc desensitized electroexplosive device

    Science.gov (United States)

    Krainiak, John W.; Speaks, Paul D.; Cornett, Michael S.

    1989-07-01

    This patent application relates to electroexplosive devices (EEDs) such as detonators, blasting caps and squibs, in particular to a method and device for desensitizing EEDs to electromagnetic radiation and electrostatic charges with the added ability to desensitize the device to essentially dc currents. An insensitive electroexplosive device to electrically ignite explosive is disclosed. This device is inherently immune to radio frequency (RF) radiation, and also provides protection against dc or very low frequency RF induced by arcing. A central feature is use of zeners and capacitors to form a reactively balanced bridge circuit. When constructed in semiconductor form, as described in this application, the device is capable of incorporation in small caliber ordnance.

  15. Propeller Flap for Complex Distal Leg Reconstruction: A Versatile ...

    African Journals Online (AJOL)

    have been described in the axilla, periolecranon, forearm, lower extremity,[1] hand,[6] and trunk.[7] In spite of the versatility of perforator‑based flaps, literature search reveals ... Anatomy of distal leg perforators. Perforators are small diameter vessels that originate from a main pedicle and perforate the fascia or muscle to ...

  16. A traction jig for reduction of distal radial fractures.

    Science.gov (United States)

    Wise, David; Coats, Tim; Persad, Ram

    2004-01-01

    A traction jig is described which facilitates the closed reduction of extra-articular distal radial fractures and which maintains the reduction whilst a plaster cast is applied. The jig is suitable for use by a single operator in an Accident and Emergency department setting.

  17. Comparative distalization effects of Jones jig and pendulum appliances.

    Science.gov (United States)

    Patel, Mayara Paim; Janson, Guilherme; Henriques, José Fernando Castanha; de Almeida, Renato Rodrigues; de Freitas, Marcos Roberto; Pinzan, Arnaldo; de Freitas, Karina Maria Salvatore

    2009-03-01

    In this study, we compared the dentoalveolar changes of Class II patients treated with Jones jig and pendulum appliances. The experimental group comprised 40 Class II malocclusion subjects, divided into 2 groups: group 1 consisted of 20 patients (11 boys, 9 girls) at a mean pretreatment age of 13.17 years, treated with the Jones jig appliance for 0.91 years; group 2 comprised 20 patients (8 boys, 12 girls) at a mean pretreatment age of 13.98 years, treated with the pendulum appliance for 1.18 years. Only active treatment time of molar distalization was evaluated in the predistalization and postdistalization lateral cephalograms. Molar, second premolar, and incisor angular and linear variables were obtained. The intergroup treatment changes in these variables were compared with independent t tests. The maxillary second premolars showed greater mesial tipping and extrusion in the Jones jig group, indicating more anchorage loss during molar distalization with this appliance. The amounts and the monthly rates of molar distalization were similar in both groups. The Jones jig group showed greater mesial tipping and extrusion of the maxillary second premolars. The mean amounts and the monthly rates of first molar distalization were similar in both groups.

  18. Distal skin vasodilation promotes rapid sleep onset in preterm neonates.

    Science.gov (United States)

    Barcat, Lucile; Decima, Pauline; Bodin, Emilie; Delanaud, Stephane; Stephan-Blanchard, Erwan; Leke, Andre; Libert, Jean-Pierre; Tourneux, Pierre; Bach, Veronique

    2017-10-01

    Although sleep is of paramount importance for preterm neonates, care of the latter in a neonatal intensive care unit does not favour sleep. Given that several studies in adults have described a 'vegetative preparedness to sleep' (in which distal skin vasodilation before lights-out promotes rapid sleep onset), we looked at whether or not this process operates in preterm neonates. Sleep propensity was assessed in terms of the duration of a spontaneous episode of wakefulness (W). Skin temperatures at six body sites (the abdomen, pectoral region, eye, hand, thigh and foot) were measured (using infrared thermography) during nocturnal polysomnography in 29 9-day-old preterm neonates (postmenstrual age: 209 ± 9 days). We then determined whether the duration of the W episode depended upon the local skin temperatures measured at the start, during and end of the episode. The W episode was shorter when distal skin temperatures (thigh, hand and foot) and the pectoral temperature were higher at the end of the episode (i.e. at sleep onset). The relationship with the duration of the W episode was not significant for temperatures measured at the start of the W episode. We observed gradual distal vasodilation at the pectoral region, the thigh, hand and foot (i.e. affecting most of the body's skin surface) during W episodes. Our results constitute initial evidence to show that distal vasodilation may have a key role in facilitating sleep onset in very preterm neonates. © 2017 European Sleep Research Society.

  19. Proximal and distal environmental correlates of adolescent obesity.

    Science.gov (United States)

    Nesbit, Kathryn C; Kolobe, Thubi A; Arnold, Sandra H; Sisson, Susan B; Anderson, Michael P

    2014-08-01

    The purpose of this study was to determine how proximal (home) and distal (neighborhood) environmental characteristics interact to influence obesity in early and middle adolescents. This was a descriptive, cross-sectional study using the 2007 National Survey of Children's Health (NCSH). Participants were 39,542 children ages 11 to 17 years. Logistic regressions were used to examine the relationship between adolescent obesity and environmental factors, the relative strength of these factors, and the influence of age and gender. Proximal environmental factors were stronger correlates of adolescent obesity than distal environmental factors. Sedentary behavior related to TV watching time at home was the strongest correlate of adolescent obesity overall (OR 1.13, 95% CI 1.11-1.15). Parks and playgrounds (OR 0.86, 95% CI 0.08-0.92), as well as recreation centers (OR 0.91, 95% CI 0.85-0.97) were significant distal environmental factor correlates. Girls and middle adolescents were at less risk for obesity than boys and early adolescents (OR 0.51, 95% CI 0.68-0.82; OR 0.75, 95% CI 0.68-0.96). The results of this study reveal the importance of proximal environmental characteristics on adolescent obesity relative to distal environmental characteristics. Obesity intervention strategies for adolescents should target sedentary behavior and opportunities for physical activity with a focus on early adolescents and boys.

  20. Surgical management of acute distal biceps tendon rupture ...

    African Journals Online (AJOL)

    Acute distal biceps tendon rupture constitute a rare lesion of biceps injuries, typically, easy to diagnosis after lifting a heavy object. Treatment is controversial, nonoperative for sedentary and elderly patients; surgical for young and active individuals. Many operative techniques are described, they all aim to restore an ...

  1. Evaluation of various filling techniques in distal canals of mandibular ...

    African Journals Online (AJOL)

    Evaluation of various filling techniques in distal canals of mandibular molars instrumented with different single-file nickel-titanium systems. ... Comparisons between groups were applied using Student's t-test or one-way ANOVA for normally distributed data. The Mann-Whitney U-test or Kruskal-Wallis test was used when ...

  2. Distal adding-on phenomenon in Lenke 1A scoliosis

    DEFF Research Database (Denmark)

    Wang, Yu; Hansen, Ebbe Stender; Høy, Kristian

    2011-01-01

    the instrumentation) from the CSVL (the vertical line that bisects proximal sacrum). Five methods for determining LIV were compared in both the adding-on group and no adding-on group. RESULTS: Out of the 278 patients reviewed, 45 met the inclusion criteria; 23 of these met the definition for distal adding...

  3. Distal biceps reconstruction 13 years post-injury.

    Science.gov (United States)

    Burrus, M Tyrrell; Chhabra, A Bobby

    2015-04-01

    Distal biceps tendon ruptures are relatively rare injuries most commonly caused by an eccentric contraction of the biceps brachii. The majority of complete ruptures receive early surgical intervention, however, some patients do present in a delayed fashion. There are many surgical options at this time for acute and chronic injuries, and this case report describes an Achilles allograft reconstruction in a male who sustained a complete tear 13 years prior to presentation. At 12-month follow up, he had regained full function of his dominant extremity as evidence by returning to work with no limitations and by a Disabilities of the Arm, Shoulder, and Hand (DASH) score of zero. We are unaware of a successfully surgically reconstructed distal biceps tendon of this chronicity. As the literature on this subject is sparse, this case report gives credence to the idea that certain patients with a chronic distal biceps rupture should be considered for operative reconstruction and not relegated to continued failed conservative treatment. Discussed are the surgical treatment options and controversies for chronic distal biceps ruptures, and we review various outcome studies using different surgical techniques.

  4. Bilateral ruptures of the distal biceps brachii tendon.

    Science.gov (United States)

    Schneider, Adam; Bennett, J Michael; O'Connor, Daniel P; Mehlhoff, Thomas; Bennett, James B

    2009-01-01

    The purpose of this study was to identify characteristics associated with bilateral ruptures of the distal biceps tendons. We present a retrospective case series of 25 patients who sustained non-simultaneous bilateral distal biceps brachii tendon ruptures that were repaired surgically, with follow-up available on 10 patients. The average age of the patients was 50 years (range 28-76). All patients were male. The mean time from the first tendon rupture to the contralateral tendon rupture was 2.7 years (range 0.5 - 6.3). Follow-up averaged 45 months (range 24-85). Patients with bilateral ruptures tended to be middle-aged men, who commonly participated in weight lifting, manual labor, or sports, and who had higher rates of nicotine (50%) and anabolic steroid use (20%) than the general population. After surgical repair of 9 of 10 patients, patients with bilateral distal biceps tendon ruptures had good to excellent outcomes. With the numbers available, outcomes were not statistically associated with manual labor, past medical history, prescription medications, prior tendon injury, body mass index, current activity in sports, use of nutritional supplements, or anabolic steroid use, although worker's compensation claims approached statistical significance (p = 0.059). Patients who sustained bilateral distal biceps tendon ruptures tended to be middle-aged men with higher rates of nicotine and anabolic steroid use than the general population.

  5. Distal Renal Tubular Acidosis, an Uncommonly diagnosed Cause of ...

    African Journals Online (AJOL)

    Five cases of distal renal tubular acidosis aged between 2½ weeks and 2½ months are described. The presenting features included lethargy, refusal to feed, high density of periodic respiration, vomiting and recurrent episodes of unexplained metabolic acidosis. A constant feature was failure to thrive despite caloric intakes ...

  6. Conservative management of distal leg necrosis in lung transplant recipients.

    Science.gov (United States)

    Aigner, F; Husmann, M; Huber, L C; Benden, C; Schuurmans, M M

    2017-05-01

    Critical limb ischemia (CLI) with distal leg necrosis in lung transplant recipients (LTR) is associated with a high risk for systemic infection and sepsis. Optimal management of CLI has not been defined so far in LTR. In immunocompetent individuals with leg necrosis, surgical amputation would be indicated and standard care. We report on the outcome of four conservatively managed LTR with distal leg necrosis due to peripheral arterial disease (PAD) with medial calcification of the distal limb vessels. Time interval from lung transplantation to CLI ranged from four years (n = 1) to more than a decade (n = 3). In all cases a multimodal therapy with heparin, acetylsalicylic acid, iloprost and antibiotic therapy was performed, in addition to a trial of catheter-based revascularization. Surgical amputation of necrosis was not undertaken due to fear of wound healing difficulties under long-term immunosuppression and impaired tissue perfusion. Intensive wound care and selective debridement were performed. Two patients developed progressive gangrene followed by auto-amputation during a follow-up of 43 and 49 months with continued ambulation and two patients died of unrelated causes 9 and 12 months after diagnosis of CLI. In conclusion, we report a conservative treatment strategy for distal leg necrosis in LTR without surgical amputation and recommend this approach based on our experience. Copyright © 2017 Tissue Viability Society. Published by Elsevier Ltd. All rights reserved.

  7. Propeller Flap for Complex Distal Leg Reconstruction: A Versatile ...

    African Journals Online (AJOL)

    Reverse sural artery fasciocutaneous flap has become a workhorse for the reconstruction of distal leg soft tissue defects. When its use is not feasible, perforator‑based propeller flap offers a better, easier, faster, and cheaper alternative to free flap. We present our experience with two men both aged 34 years who sustained ...

  8. Laparoscopic versus open distal pancreatectomy for pancreatic cancer

    NARCIS (Netherlands)

    Riviere, D.M.; Gurusamy, K.S.; Kooby, D.A.; Vollmer, C.M.; Besselink, M.G.; Davidson, B.R.; Laarhoven, C.J.H.M. van

    2016-01-01

    BACKGROUND: Surgical resection is currently the only treatment with the potential for long-term survival and cure of pancreatic cancer. Surgical resection is provided as distal pancreatectomy for cancers of the body and tail of the pancreas. It can be performed by laparoscopic or open surgery. In

  9. Laparoscopic versus open distal pancreatectomy for pancreatic cancer

    NARCIS (Netherlands)

    Riviere, Deniece; Gurusamy, Kurinchi Selvan; Kooby, David A.; Vollmer, Charles M.; Besselink, Marc G. H.; Davidson, Brian R.; van Laarhoven, Cornelis J. H. M.

    2016-01-01

    Surgical resection is currently the only treatment with the potential for long-term survival and cure of pancreatic cancer. Surgical resection is provided as distal pancreatectomy for cancers of the body and tail of the pancreas. It can be performed by laparoscopic or open surgery. In operations on

  10. Autosomal dominant distal myopathy: Linkage to chromosome 14

    Energy Technology Data Exchange (ETDEWEB)

    Laing, N.G.; Laing, B.A.; Wilton, S.D.; Dorosz, S.; Mastaglia, F.L.; Kakulas, B.A. [Australian Neuromuscular Research Institute, Perth (Australia); Robbins, P.; Meredith, C.; Honeyman, K.; Kozman, H.

    1995-02-01

    We have studied a family segregating a form of autosomal dominant distal myopathy (MIM 160500) and containing nine living affected individuals. The myopathy in this family is closest in clinical phenotype to that first described by Gowers in 1902. A search for linkage was conducted using microsatellite, VNTR, and RFLP markers. In total, 92 markers on all 22 autosomes were run. Positive linkage was obtained with 14 of 15 markers tested on chromosome 14, with little indication of linkage elsewhere in the genome. Maximum two-point LOD scores of 2.60 at recombination fraction .00 were obtained for the markers MYH7 and D14S64 - the family structure precludes a two-point LOD score {ge} 3. Recombinations with D14S72 and D14S49 indicate that this distal myopathy locus, MPD1, should lie between these markers. A multipoint analysis assuming 100% penetrance and using the markers D14S72, D14S50, MYH7, D14S64, D14S54, and D14S49 gave a LOD score of exactly 3 at MYH7. Analysis at a penetrance of 80% gave a LOD score of 2.8 at this marker. This probable localization of a gene for distal myopathy, MPD1, on chromosome 14 should allow other investigators studying distal myopathy families to test this region for linkage in other types of the disease, to confirm linkage or to demonstrate the likely genetic heterogeneity. 24 refs., 3 figs., 1 tab.

  11. Stressfrakturer af distale fibula hos en patient med osteoporose

    DEFF Research Database (Denmark)

    Schwartz, Frederik; Heerfordt, Ida Marie

    2014-01-01

    We report a case of an 81-year-old osteoporotic woman, who suffered stress fractures of the distal fibula on both sides within a two-year period. The risk factors for stress fractures are reviewed and the importance of a high index of suspicion for stress fractures is emphasized. When a stress fr...

  12. Evaluation of Various Filling Techniques in Distal Canals of ...

    African Journals Online (AJOL)

    2017-03-06

    Mar 6, 2017 ... treatment.[10] The percentage of GP-filled areas (PGFAs) has been used as a measure of the quality of the root filling.[7] Therefore, the aim of this study was to compare different filling techniques in the distal canals of lower molars, instrumented by different single-file systems, and the canal area in terms of ...

  13. Non-Vascularised Fibular Grafting After Resection of Distal Femoral ...

    African Journals Online (AJOL)

    Background: Vascularized fibular grafting, allografting, megaprosthesis and allograft-prosthesis composite are suitable limb salvage techniques after resection of ... the initial observation showed such a wide non-vascularized fibular grafting for arthrodesis of the knee after resection of the distal femoral tumours is a feasible ...

  14. Snodgrass repair for distal hypospadias: a review of 75 cases

    African Journals Online (AJOL)

    urologists for distal hypospadias correction. We review our cases to find out whether there was any difference in the rate of urethrocutaneous fistula after the use of single- versus double-layer tubularization, the use of thick versus thin dorsal prepuce subcutaneous flap (DPF), the use of. DPF versus the ventral dartos flap for ...

  15. Urethral advancement procedure in the treatment of primary distal ...

    African Journals Online (AJOL)

    advancement in the repair of primary distal penile hypospadias with regard to feasibility, complication rates .... stones and growth, and any associated congenital anomaly. Meticulous local examination was performed ... with a tourniquet placed on the root of the penis. A submeatal crescent-like incision was performed a few.

  16. Simultaneous bilateral distal biceps tendon repair: case report

    Directory of Open Access Journals (Sweden)

    Thiago Medeiros Storti

    Full Text Available ABSTRACT Simultaneous bilateral rupture of the distal biceps tendon is a rare clinical entity, seldom reported in the literature and with unclear therapeutic setting. The authors report the case of a 39-year-old white man who suffered a simultaneous bilateral rupture while working out. When weightlifting with elbows at 90° of flexion, he suddenly felt pain on the anterior aspect of the arms, coming for evaluation after two days. He presented bulging contour of the biceps muscle belly and ecchymosis in the antecubital fossa, extending distally to the medial aspect of the forearm, as well as a marked decrease of supination strength and pain in active elbow flexion. MRI confirmed the rupture with retraction of the distal biceps bilaterally. The authors opted for performing the tendon repairs simultaneously through the double incision technique and fixation to the bicipital tuberosity with anchors. The patient progressed quite well, with full return to labor and sports activities, being satisfied with the result after two years of surgery. In the literature search, few reports of simultaneous bilateral rupture of the distal biceps were retrieved, with only one treated in the acute phase of injury. Therefore, the authors consider this procedure to be a good option to solve this complex condition.

  17. Neglected distal humeral epiphyseal injury - Two Case Reports ...

    African Journals Online (AJOL)

    We present two cases of neglected distal humeral epiphyseal injury in children that resulted in cubitus varus deformity in one case. Full range of movements was achieved in both cases after proper management. Keywords: Neglected epiphyseal injury; Cubitus varus; Diagnosis; Treatment Internet Journal of Medical Update ...

  18. Unusual migration of ventriculo peritoneal distal catheter into vagina

    Directory of Open Access Journals (Sweden)

    Sghavamedin Tavallaee

    2015-04-01

    Full Text Available VP shunt is one of the most popular methods for ICP reduction and treatment of hydrocephalus. Various complications of this method are not uncommon such as shunt malfunction, infection and unusual migration of distal catheter. I present a case of migration of the peritoneal catheter out of the vagina.

  19. Endoprosthetic replacement of distal femoral tumors in Nigeria: A ...

    African Journals Online (AJOL)

    2015-08-12

    Aug 12, 2015 ... In this observational study, three consecutive patients who were treated for distal femur tumours using endoprosthetic replacement between June 2013 and June 2014 were studied. The patients were within the ages of 28-47 years at the time of surgery. All three patients had modular endoprosthesis ...

  20. Subtrochanteric and Distal Femur Fractures in a Patient with ...

    African Journals Online (AJOL)

    There was an improvement of the preinjury function attributed to the osteotomy of the femoral diaphyseal, which alleviated the anterior thigh discomfort. Keywords: Amputation, Distal femur fracture, Femoral shaft fracture, Femur, Femur fractures, Fracture fixation, Fracture malunion, Fractures, Intramedullary nail, Knee ...

  1. An electro-myographic study of the distal porcine ureter

    NARCIS (Netherlands)

    Roshani, H.; Dabhoiwala, N. F.; Dijkhuis, T.; Ongerboer de Visser, B. W.; Kurth, K. H.; Lamers, W. H.

    2000-01-01

    PURPOSE: The accumulation of urine in the renal pelvis causes depolarisation of non-specific muscular pace-maker cells. The wave of depolarisation spreads distally in the ureteric smooth muscle cells via gap junctions. This wave of excitation causes a coordinated peristaltic contraction which

  2. Outcome of management of distal radius fractures in ...

    African Journals Online (AJOL)

    Background and Purpose: Distal radial fractures are common fractures of postmenopausal age group patients. They are often called fractures of osteoporosis. These fractures are considered to be one of the commonest minor injuries to cause major morbidity in the community. A lot of patient who need surgery, fail to afford ...

  3. Genetics Home Reference: CAV3-related distal myopathy

    Science.gov (United States)

    ... gene causes a peculiar form of distal myopathy. Neurology. 2002 Jan 22;58(2):323-5. Erratum in: Neurology 2002 Mar 12;58(5):839. Itoyoma Y [ ... 3 cause four distinct autosomal dominant muscle diseases. Neurology. 2004 Feb 24;62(4):538-43. Review. ...

  4. Spontaneous resolution of splenic infarcts after distal splenorenal ...

    African Journals Online (AJOL)

    Background: In cases of portal hypertension with splenic infarcts, splenectomy with proximal splenorenal shunt has been recommended. We are sharing our experience with distal splenorenal shunt in these cases contrary to the popular belief. Materials and Methods: Splenic infarcts were graded as mild, moderate and ...

  5. Local repair of distal thoracal aortic dissections (Locus minoris resistencia).

    Science.gov (United States)

    Belov, Iu V; Komarov, R N; Stepanenko, A B; Gens, A P; Charchian, E R

    2007-01-01

    The paper presents the method of local repair of distal aortic dissections. Local aortic grafting for surgical correction of type B dissecting aortic aneurysms helped to decrease hospital mortality up to 15.4%, the rate of paraparesis and multiorgan failure - up to 11.5%.

  6. Impact of a new distal attachment on colonoscopy performance in an academic screening center.

    Science.gov (United States)

    Tsiamoulos, Zacharias P; Misra, Ravi; Rameshshanker, Rajaratanam; Elliott, Timothy R; Beintaris, Iosif; Thomas-Gibson, Siwan; Haycock, Adam; Suzuki, Noriko; Rees, Colin; Saunders, Brian P

    2018-01-01

    Distal attachments placed on the colonoscope tip may positively affect performance by assisting insertion and polyp detection. The original Endocuff (ARC Medical Design, Leeds, United Kingdom) appears to improve adenoma detection rate (ADR), but no data assess the performance of the second-generation Endocuff Vision. A pilot service evaluation study (April 2013 to September 2014) was conducted on patients with positive fecal occult blood tests within the National Bowel Cancer Programme during 3 consecutive periods: precuff/no device used, during-cuff/device used, and postcuff/no device used. During the middle period the use of the Endocuff Vision by the 4 screening-accredited colonoscopists was discretional (nonrandomized design). Data were analyzed using pairwise comparisons during the 3 designated periods to examine key performance indicators: adenoma detection, procedural time, sedation requirements, and patient comfort. Four hundred ten complete colonoscopies were performed (137 precuff, 136 cuff, and 137 postcuff period). Overall, there was a notable increase in the mean ADR of 16% (P evaluation study, the use of the Endocuff Vision appears to be associated with an improvement in overall colonoscopy operator performance. We found increased ADR and MAP as well as decreased time for colonoscope insertion and withdrawal time with no increase in sedation requirements or patient discomfort. Crown Copyright © 2018. Published by Elsevier Inc. All rights reserved.

  7. Evaluation of the Jones jig appliance for distal molar movement.

    Science.gov (United States)

    Brickman, C D; Sinha, P K; Nanda, R S

    2000-11-01

    The purpose of this study was to determine the effects of the Jones jig appliance on distal movement of maxillary molars and reciprocal effects on premolars and maxillary incisors. Cephalometric radiographs before and after orthodontic treatment of 72 consecutively treated patients, 46 females and 26 males, were measured to define treatment changes attributed to the Jones jig. Comparative measurements were made on a matched sample of 35 patients (20 females and 15 males) treated with cervical headgear by the same clinician. Both series of patients were treated to correct an Angle Class II molar relationship. The molar correction in the Jones jig patients consisted primarily of molar distal movement. Dental, soft tissue, and skeletal changes were evaluated and compared for significant differences between techniques. The results from the Jones jig sample showed the mean maxillary first molar distal movement was 2.51 mm, with distal tipping of 7.53 degrees. The mean reciprocal mesial movement of the maxillary premolar was 2.0 mm, with mesial tipping of 4.76 degrees. The maxillary first molar extruded 0.14 mm; the maxillary premolar extruded 1.88 mm. The maxillary second molars were also moved distally 2.02 mm and tipped distally 7.89 degrees. The longitudinal assessment (initial to completion of orthodontic treatment) showed significant differences between the Jones jig sample and the cervical headgear sample for lower lip to E-line and SNA. The Jones jig sample showed a mean decrease in lower lip to E-line of 0.25 mm versus 1.20 mm (P jig sample versus 1.20 degrees (P jig sample and cervical headgear sample did not show significant differences of the final position in either linear or angular measurements of the maxillary first molars and corresponding premolar-incisor anchor units. The Jones jig appliance demonstrated treatment results comparable with those of the sample treated with cervical headgear. The Jones jig sample demonstrated effective distal molar

  8. VOLAR LOCKING PLATE OSTEOSYNTHESIS IN DISTAL END RADIUS FRACTURES

    Directory of Open Access Journals (Sweden)

    Gyan Ranjan

    2017-07-01

    Full Text Available BACKGROUND Distal end Radius fractures account for about 20% of all the fracture treated in emergency department of Kosi & Seemanhcal area in Bihar. The majority of osteoporotic fractures occur as a result of fall from standing height on outstretched hand while in young patients, distal end radius fractures are seen secondary to RTA & sports activities. We conducted a study of a small group to evaluate the functional outcome of ORIF & volar locking plate fixation done for distal end radius fractures after one year. MATERIALS AND METHODS Records of 19 men and 41 women aged 17 to 78 years who underwent volar locking plate fixation for distal radial fractures were reviewed. According to AO-Classification of Distal End Radius fractures. 2 Patients had A2 Type of fracture, 3 had A3 Type, both B2 & B3 had 4 cases each, 15 of C1 Type, 21 of C2 type and 11 0f C3 Type. Functional outcome was assessed by using “Demerit point rating system” of Gartland & Werley. In all the patients at their final follow-up visit at 12 months. RESULTS Out of all these 60 patients, 9 cases had 10 complications, 2 cases developed Grade (I Arthritis, 2 cases developed Grade (II arthritis, 1 case developed superficial skin infection with medium nerve compression symptoms, 2 cases developed superficial skin infection which was resolved by continuous dressing on alternate days & 5 cases developed median nerve compression symptoms in which for 2 cases symptoms resolved with time, in rest 3 cases carpal Tunnel Decompression was done. Overall 63.3% result were excellent, 23.3% were good & 13.3% fair outcomes. The residual deformity was 0.70 the subjective score was 1.47 the objective score was 1.70, the total demerit score was as per modification Garland & Werley scoring groups (Mean values was 3.67. In all the cases, stainless steel plate was used. CONCLUSION In distal end radius fractures open reduction and internal fixation with volar locking compression plate followed by

  9. A three-dimensional finite element analysis of molar distalization with a palatal plate, pendulum, and headgear according to molar eruption stage

    Science.gov (United States)

    Kang, Ju-Man; Park, Jae Hyun; Bayome, Mohamed; Oh, Moonbee; Park, Chong Ook; Mo, Sung-Seo

    2016-01-01

    Objective This study aimed to (1) evaluate the effects of maxillary second and third molar eruption status on the distalization of first molars with a modified palatal anchorage plate (MPAP), and (2) compare the results to the outcomes of the use of a pendulum and that of a headgear using three-dimensional finite element analysis. Methods Three eruption stages were established: an erupting second molar at the cervical one-third of the first molar root (Stage 1), a fully erupted second molar (Stage 2), and an erupting third molar at the cervical one-third of the second molar root (Stage 3). Retraction forces were applied via three anchorage appliance models: an MPAP with bracket and archwire, a bone-anchored pendulum appliance, and cervical-pull headgear. Results An MPAP showed greater root movement of the first molar than crown movement, and this was more noticeable in Stages 2 and 3. With the other devices, the first molar showed distal tipping. Transversely, the first molar had mesial-out rotation with headgear and mesial-in rotation with the other devices. Vertically, the first molar was intruded with an MPAP, and extruded with the other appliances. Conclusions The second molar eruption stage had an effect on molar distalization, but the third molar follicle had no effect. The application of an MPAP may be an effective treatment option for maxillary molar distalization. PMID:27668192

  10. Minimally invasive plating osteosynthesis for mid-distal third humeral shaft fractures.

    Science.gov (United States)

    Lian, Kejian; Wang, Lei; Lin, Dasheng; Chen, Zhiwen

    2013-08-01

    Mid-distal third humeral shaft fractures can be effectively treated with minimally invasive plating osteosynthesis and intramedullary nailing (IMN). However, these 2 treatments have not been adequately compared. Forty-seven patients (47 fractures) with mid-distal third humeral shaft fractures were randomly allocated to undergo either minimally invasive plating osteosynthesis (n=24) or IMN (n=23). The 2 groups were similar in terms of fracture patterns, fracture location, age, and associated injuries. Intraoperative measurements included blood loss and operative time. Clinical outcome measurements included fracture healing, radial nerve recovery, and elbow and shoulder discomfort. Radiographic measurements included fracture alignment, time to healing, delayed union, and nonunion. Functional outcome was satisfactory in both groups. Mean American Shoulder and Elbow Surgeons score and Mayo score were both better for the minimally invasive plating osteosynthesis group than for the IMN group (98.2 vs 97.6, respectively, and 93.5 vs 94.1, respectively; Pshaft fractures. Minimally invasive plating osteosynthesis is more suitable for complex fractures, especially for radial protection and motion recovery of adjacent joints, compared with IMN for simple fractures. Copyright 2013, SLACK Incorporated.

  11. Laparoscopic radical nephroureterectomy: dilemma of the distal ureter.

    Science.gov (United States)

    Steinberg, Jordan R; Matin, Surena F

    2004-03-01

    Laparoscopic nephroureterectomy has recently emerged as a safe, minimally invasive approach to upper tract urothelial cancers. The most controversial and challenging feature of laparoscopic nephroureterectomy is the management of the distal ureter. We review the most common methods of managing the distal ureter, with emphasis on contemporary oncologic outcomes, indications, advantages, and disadvantages. There are currently in excess of five different approaches to the lower ureter. These techniques often combine features of endoscopic, laparoscopic, or open management. They include open excision, a transvesical laparoscopic detachment and ligation technique, laparoscopic stapling of the distal ureter and bladder cuff, the "pluck" technique, and ureteral intussusception. Each technique has distinct advantages and disadvantages, differing not only in technical approach, but oncological principles as well. While the existing published data do not overwhelmingly support one approach over the others, the open approach remains one of the most reliable and oncologically sound procedures. The principles of surgical oncology dictate that a complete, en-bloc resection, with avoidance of tumor seeding, remains the preferred treatment of all urothelial cancers. The classical open technique of securing the distal ureter and bladder cuff achieves this principle and has withstood the test of time. Transvesical laparoscopic detachment and ligation is an oncologically valid approach in patients without bladder tumors, but is limited by technical considerations. The laparoscopic stapling technique maintains a closed system but risks leaving behind ureteral and bladder cuff segments. Both transurethral resection of the ureteral orifice (pluck) and intussusception techniques should be approached with caution, as the potential for tumor seeding exists. Additional long-term comparative outcomes are needed to solve the dilemma of the distal ureter.

  12. Distal pancreatectomy and splenectomy: a robotic or LESS approach.

    Science.gov (United States)

    Ryan, Carrie E; Ross, Sharona B; Sukharamwala, Prashant B; Sadowitz, Benjamin D; Wood, Thomas W; Rosemurgy, Alexander S

    2015-01-01

    The role and application of robotic surgery are debated, particularly given the expansion of laparoscopy, especially laparoendoscopic single-site (LESS) surgery. This cohort study was undertaken to delineate differences in outcomes between LESS and robotic distal pancreatectomy and splenectomy. With Institutional Review Board approval, patients undergoing LESS or robotic distal pancreatectomy and splenectomy from September 1, 2012, through December 31, 2014, were prospectively observed, and data were collected. The results are expressed as the median, with the mean ± SD. Thirty-four patients underwent a minimally invasive distal pancreatectomy and splenectomy: 18 with robotic and 16 with LESS surgery. The patients were similar in sex, age, and body mass index. Conversions to open surgery and estimated blood loss were similar. There were two intraoperative complications in the group that underwent the robotic approach. Time spent in the operating room was significantly longer with the robot (297 vs 254 minutes, P = .03), although operative duration (i.e., incision to closure) was not longer (225 vs 190 minutes; P = .15). Of the operations studied, 79% were undertaken for neoplastic processes. Tumor size was 3.5 cm for both approaches; R0 resections were achieved in all patients. Length of stay was similar in the two study groups (5 vs 4 days). There was one 30-day readmission after robotic surgery. Patient outcomes are similar with LESS or robotic distal pancreatectomy and splenectomy. Robotic operations require more time in the operating room. Both are safe and efficacious minimally invasive operations that follow similar oncologic principles for similar tumors, and both should be in the surgeon's armamentarium for distal pancreatectomy and splenectomy.

  13. Printing Device

    NARCIS (Netherlands)

    Berg, van den M.J.; Markies, P.R.; Zuilhof, H.

    2014-01-01

    An ink jetprinting device includes a pressure chamber formed by a plurality of wall segments, a first aperture extending through a wall segment and communicating with an ink jet orifice and a second aperture extending through a wall segment and communicating with an ink supply duct. The pressure

  14. Detection device

    Science.gov (United States)

    Smith, J.E.

    1981-02-27

    The present invention is directed to a detection device comprising: (1) an entrance chamber; (2) a central chamber; and (3) an exit chamber. The central chamber includes an ionizing gas, anode, and means for connecting the anode with an external power supply and pulse counter.

  15. Frequent complications and severe bone loss associated with the repiphysis expandable distal femoral prosthesis.

    Science.gov (United States)

    Cipriano, Cara A; Gruzinova, Irina S; Frank, Rachel M; Gitelis, Steven; Virkus, Walter W

    2015-03-01

    The treatment of choice for distal femur malignancies in skeletally immature patients remains controversial. An expandable endoprosthesis device (Repiphysis Limb Salvage System; Wright Medical Technology, Arlington, TN, USA) allows for limb preservation and noninvasive lengthening but has been associated with significant complications; however, the extent and implications of bone loss associated with this implant have not been reported. Our goals were to report (1) the 2-year minimum clinical outcomes after placement of the Repiphysis expandable prosthesis for pediatric distal femur malignancies; (2) the complications associated with this prosthesis; (3) the failure rate of this prosthesis; and (4) the revision alternatives available for salvage procedures. Between 2002 and 2010, one surgeon (SG) treated all skeletally immature patients (mean age, 10.1 years; range, 4.7-13.6 years) with distal femoral osteosarcoma using a Repiphysis expandable prosthesis. Of the 12 patients who met these criteria, two were excluded for death from disease before 2 years, and mean followup for the remaining 10 was 72 months (range, 26-119 months). Medical records were retrospectively reviewed for complications and clinical outcomes, as assessed by the Musculoskeletal Tumor Society (MSTS) scoring system. Radiographs at final followup were reviewed for bone loss and analyzed by the two senior authors (SG, WWV) to determine reconstruction options available for future revisions. MSTS scores averaged 67%, and we observed 37 implant-related complications requiring a total of 15 reoperations. Six patients underwent implant revisions with aseptic loosening being the predominant mode of failure; ultimately, four of these were converted to adult modular oncology prostheses, and two underwent total femoral replacements. Bone loss in this series was severe in terms of femoral length, cortical thinning, and metadiaphyseal compromise, and most patients will not have sufficient bone stock to permit

  16. Distal Radius Fracture Treated by Internal Fixation with Plates, Screws and the RALCA® External Mini-fixator

    OpenAIRE

    Rafael López Cuellar; Yaniel Truffin Rodríguez; Yudit Pérez Álvarez

    2016-01-01

    Distal radius fractures are very common in medical practice. In our service, we may not have the most widely used devices for fixation of these fractures at a given moment. For this reason, we must consider all possible combinations within our power to correct them since most of the time, it is impossible to maintain a fracture reduction using a single technique. We present the case of a 24-year-old female patient treated at the Dr. Gustavo Aldereguía Lima University General Hospital in Cienf...

  17. Tritium removal and retention device

    International Nuclear Information System (INIS)

    1976-01-01

    The patent discloses an apparatus comprising a two-layered composite with an internal core of zirconium or zirconium alloy which retains tritium, and an adherent nickel outer layer which acts as a protective and selective window for passage of the tritium. The invention provides a device to remove and store tritium from a gaseous medium as well as a method for manufacturing the device. It specifically provides a device which may be incorporated in the fuel rod of a nuclear reactor to minimize release of tritium to the reactor coolant

  18. Reactor power measuring device

    International Nuclear Information System (INIS)

    Izumi, Mikio; Sano, Yuji; Seki, Eiji; Yoshida, Toshifumi; Ito, Toshiaki.

    1993-01-01

    The present invention provides a self-powered long detector having a sensitivity over the entire length of a reactor core as an entire control rod withdrawal range of a BWR type reactor, and a reactor power measuring device using a gamma ray thermometer which scarcely causes sensitivity degradation. That is, a hollow protection pipe is disposed passing through the reactor core from the outside of a reactor pressure vessel. The self-powered long detectors and the gamma ray thermometers are inserted and installed in the protection pipe. An average reactor power in an axial direction of the reactor relative to a certain position in the horizontal cross section of the reactor core is determined based on the power of the self-powered long detector over the entire length of the reactor core. Since the response of the self-powered detector relative to a local power change is rapid, the output is used as an input signal to a safety protection device of the reactor core. Further, a gamma ray thermometer secured in the reactor and having scarce sensitivity degradation is used instead of an incore travelling neutron monitor used for relative calibration of an existent neutron monitor secured in the reactor. (I.S.)

  19. Health hazards of uranium dust from radioactive battlefields of the Balkan conflicts, Eastern Afghanistan and Iraq after the Gulf wars. Lessons for civil protection in the terrorist scenario of radiological dispersion devices

    International Nuclear Information System (INIS)

    Durakovic, A.; Klimaschewski, F.

    2007-01-01

    Complete text of publication follows. Purpose: The purpose of this study is to identify key health hazards of uranium dust from the radioactive battlefields (Balkan, Middle East and Eastern Afghanistan conflicts) to draw lessons for civil protection in the terrorist scenario of radiological dispersion devices (RDD). Gulf War I (GW I) in 1991 resulted in 350 metric tons of depleted uranium (DU) deposited in the environment and 3 to 6 million grams of DU aerosol dust particles released into the atmosphere, by the most conservative estimates. Its possible legacy (Gulf War disease) continues after the military conflicts (Operation Enduring Freedom, OEF, in Afghanistan and Gulf War II in Iraq). The symptoms of the multiorgan incapacitating progressive disease have been as numerous as their names, including incapacitating fatigue, musculoskeletal and joint pains, headaches, neuropsychiatric disorders, affects changes, confusion, visual problems, changes of gait, loss of memory, lympadenopathies, respiratory impairment, impotence, and urinary tract morphological and functional alterations. The disease is still a matter of controversy regarding etiology and pathogenesis of the syndrome commonly named Gulf War disease. It was underestimated and subsequently evolved in its clinical description through recognition of progressive symptomatology. Methods: UMRC's studies of the human contamination with uranium isotopes were conducted with the exposed subjects of Jalalabad, Spin Gar, Tora Bora, and Kabul areas in Afghanistan after OEF as well as Samawah, Baghdad and Basrah in Iraq after GW II. The urine samples of the subjects were analysed by the plasma mass spectrometry. The analytical methodology involved pre-concentration of the uranium using co-precipitation and/or evaporation, oxidation of organic matter, purification of uranium with ion exchange chromatography, and mass spectrometry with a double focusing Thermo-Elemental Plasma54 multi-collector ICP-MS equipped with a

  20. Setscrew distal locking for intramedullary nails: a biomechanical study.

    Science.gov (United States)

    Köse, N; Günal, I; Wang, X; Athanasiou, K A; Agrawal, C M; Mabrey, J D

    2000-08-01

    This biomechanical study was undertaken to examine the effectiveness of setscrew distal locking in a static intramedullary (IM) femoral nail on the stability of fixation of femoral shaft fractures. Fifteen fresh-frozen cadeveric femora were randomly separated into three groups of five bones and transversely sectioned immediately distal to the isthmus. After the insertion of the large-diameter nails, distal locking was obtained by conventional method in the first group. In the second group, set-screw design was used in which two transverse screws penetrated only the lateral cortex of the femur and compressed the nail in the intramedullary canal. No distal locking was used in the third group. All instrumented femurs were mounted on a servohydraulic testing machine and tested in both rotations (20 degrees) and axial compression (amplitude: 1,000 Newton). Loading-versus-displacement data, acquired at a ten-Hertz sampling rate, were calibrated and used to calculate maximum torque, stiffness, and energy capacity to failure. Maximum displacement and axial stiffness also were determined. Mean maximum torque at 10 degrees for each group were 15.3+/-4.8 newton-meters for the interlocking group, 8.5 +/-1.2 newton-meters for the setscrew group, and 3.6+/-2.7 newton-meters for the nonlocked femora. At 20 degrees of rotational displacement, the torque measured 37.4+/-2.6 newton-meters; 15.0+/-4.0 newton-meters; and 5.3+/-3.1 newton-meters, respectively (p 0.05). The setscrew design provided 87 percent of the torsional rigidity of the interlocking group. In the axial compression test, mean maximum shortening was 1.1+/-0.3 millimeters in the interlocking group and 1.4+/-0.6 millimeters in the setscrew group (p > 0.05). The mean stiffness on longitudinal compression provided by the interlocking screws and the setscrews was 918 and 860 newton-meters per millimeter, respectively. The distal setscrew design provides adequate distal fixation of intramedullary nail for patients in the

  1. [Ultrastructure of statocytes and cells of distal elongation zone of Arabidopsis thaliana under clinorotation].

    Science.gov (United States)

    Romanchuk, S M

    2010-01-01

    Results of the electron-microscopic investigation of root apices of Arabidopsis thaliana 3-, 5- and 7-days-old seedlings grown in the stationary conditions and under clinorotation are presented. It was shown the similarity in the root apex cell ultrastructure in control and under clinorotation. At the same time there were some differences in the ultrastructure of statocytes and the distal elongation zone under clinorotation. For the first time the sensitivity of ER-bodies, which are derivatives of GER and contain beta-glucosidase, to the influence of simulated microgravity was demonstrated by increased quantity and area of ER-bodies at the cell section as well as by higher variability of their form under clinorotation. A degree of these changes correlated with the duration of clinorotation. On the basis of experimental data a protective role of ER-bodies in adaptation of plants to microgravity is supposed.

  2. Haptic device for telerobotic surgery

    Science.gov (United States)

    Salisbury, Curt; Salisbury, Jr., J. Kenneth

    2014-12-30

    A haptic device for telerobotic surgery, including a base; a linkage system having first and second linkage members coupled to the base; a motor that provides a motor force; a transmission including first and second driving pulleys arranged such that their faces form an angle and their axes form a plane, first and second idler pulleys offset from the plane and arranged between the first and second driving pulleys such that their axes divide the angle between the first and second driving pulleys, and a cable that traverses the first and second driving pulleys and the set of idler pulleys and transfers the motor force to the linkage system; an end effector coupled to distal ends of the first and second linkage members and maneuverable relative to the base; and a controller that modulates the motor force to simulate a body part at a point portion of the end effector.

  3. 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.

  4. Multicentre prospective evaluation of implant-assisted mandibular bilateral distal extension removable partial dentures: patient satisfaction

    NARCIS (Netherlands)

    Wismeijer, D.; Tawse-Smith, A.; Payne, A.G.T.

    2013-01-01

    Objective To compare the levels of patient satisfaction with either conventional mandibular bilateral distal extension partial dentures or those assisted by bilateral distal implants. Materials and methods Forty-eight participants who were dissatisfied with their existing conventional mandibular

  5. Minimally invasive versus open distal pancreatectomy (LEOPARD) : Study protocol for a randomized controlled trial

    NARCIS (Netherlands)

    de Rooij, Thijs; van Hilst, Jony; Vogel, Jantien A.; van Santvoort, Hjalmar C.; de Boer, Marieke T.; Boerma, Djamila; van den Boezem, Peter B.; Bonsing, Bert A.; Bosscha, Koop; Coene, Peter-Paul; Daams, Freek; van Dam, Ronald M.; Dijkgraaf, Marcel G.; van Eijck, Casper H.; Festen, Sebastiaan; Gerhards, Michael F.; Koerkamp, Bas Groot; Hagendoorn, Jeroen; van der Harst, Erwin; de Hingh, Ignace H.; Dejong, Cees H.; Kazemier, Geert; Klaase, Joost; de Kleine, Ruben H.; van Laarhoven, Cornelis J.; Lips, Daan J.; Luyer, Misha D.; Molenaar, I. Quintus; Nieuwenhuijs, Vincent B.; Patijn, Gijs A.; Roos, Daphne; Scheepers, Joris J.; van der Schelling, George P.; Steenvoorde, Pascal; Swijnenburg, Rutger-Jan; Wijsman, Jan H.; Abu Hilal, Moh'd; Busch, Olivier R.; Besselink, Marc G.

    2017-01-01

    Background: Observational cohort studies have suggested that minimally invasive distal pancreatectomy (MIDP) is associated with better short-term outcomes compared with open distal pancreatectomy (ODP), such as less intraoperative blood loss, lower morbidity, shorter length of hospital stay, and

  6. Multicenter comparative study of laparoscopic and open distal pancreatectomy using propensity score-matching.

    Science.gov (United States)

    Nakamura, Masafumi; Wakabayashi, Go; Miyasaka, Yoshihiro; Tanaka, Masao; Morikawa, Takanori; Unno, Michiaki; Tajima, Hiroshi; Kumamoto, Yusuke; Satoi, Sohei; Kwon, Masanori; Toyama, Hirochika; Ku, Yonson; Yoshitomi, Hideyuki; Nara, Satoshi; Shimada, Kazuaki; Yokoyama, Takahide; Miyagawa, Shinichi; Toyama, Yoichi; Yanaga, Katsuhiko; Fujii, Tsutomu; Kodera, Yasuhiro; Tomiyama, Yasuyuki; Miyata, Hiroaki; Takahara, Takeshi; Beppu, Toru; Yamaue, Hiroki; Miyazaki, Masaru; Takada, Tadahiro

    2015-10-01

    Laparoscopic distal pancreatectomy has been shown to be associated with favorable postoperative outcomes using meta-analysis. However, there have been no randomized controlled studies yet. This study aimed to compare laparoscopic and open distal pancreatectomy using propensity score-matching. We retrospectively collected perioperative data of 2,266 patients who underwent distal pancreatectomy in 69 institutes from 2006-2013 in Japan. Among them, 2,010 patients were enrolled in this study and divided into two groups, laparoscopic distal pancreatectomy and open distal pancreatectomy. Perioperative outcomes were compared between the groups using unmatched and propensity matched analysis. After propensity score-matching, laparoscopic distal pancreatectomy was associated with favorable perioperative outcomes compared with open distal pancreatectomy, including higher rate of preservation of spleen and splenic vessels (P pancreatectomy was associated with more favorable perioperative outcomes than open distal pancreatectomy. © 2015 Japanese Society of Hepato-Biliary-Pancreatic Surgery.

  7. Plate fixation and bone grafting of distal clavicle nonunions: radiologic and functional outcomes

    NARCIS (Netherlands)

    Villa, Jordan C.; van der List, Jelle P.; Gausden, Elizabeth B.; Lorich, Dean G.; Helfet, David L.; Kloen, Peter; Wellman, David S.

    2016-01-01

    The optimal treatment for distal clavicle nonunions remains unknown. Small series have reported outcomes following distal fragment excision and various fixation techniques. We present the clinical, radiographic and functional outcomes after superior plating or double (superior and anteroinferior)

  8. Thin film device applications

    CERN Document Server

    Kaur, Inderjeet

    1983-01-01

    Two-dimensional materials created ab initio by the process of condensation of atoms, molecules, or ions, called thin films, have unique properties significantly different from the corresponding bulk materials as a result of their physical dimensions, geometry, nonequilibrium microstructure, and metallurgy. Further, these characteristic features of thin films can be drasti­ cally modified and tailored to obtain the desired and required physical characteristics. These features form the basis of development of a host of extraordinary active and passive thin film device applications in the last two decades. On the one extreme, these applications are in the submicron dimensions in such areas as very large scale integration (VLSI), Josephson junction quantum interference devices, magnetic bubbles, and integrated optics. On the other extreme, large-area thin films are being used as selective coatings for solar thermal conversion, solar cells for photovoltaic conver­ sion, and protection and passivating layers. Ind...

  9. 46 CFR 111.51-3 - Protection of vital equipment.

    Science.gov (United States)

    2010-10-01

    ...-GENERAL REQUIREMENTS Coordination of Overcurrent Protective Devices § 111.51-3 Protection of vital equipment. (a) The coordination of overcurrent protective devices must be demonstrated for all potential... 46 Shipping 4 2010-10-01 2010-10-01 false Protection of vital equipment. 111.51-3 Section 111.51-3...

  10. Thermonuclear device

    International Nuclear Information System (INIS)

    Yagi, Yasuomi; Takahashi, Ken; Hashimoto, Hiroshi.

    1984-01-01

    Purpose: To improve the plasma confining performances by bringing the irregular magnetic fields nearly to zero and decreasing the absolute value of the irregular magnetic fields at every positions. Constitution: The winding direction of a plurality of coil elements, for instance, double pan cake coils of toroidal coils in a torus type or mirror type thermonuclear device are reversed to each other in their laminating direction, whereby the irregular magnetic fields due to the coil-stepped portions in each toroidal coils are brought nearly to zero. This enables to bring the average irregular magnetic fields as a whole in the thermonuclear device nearly to zero, as well as, decrease the absolute value of the irregular magnetic fields in each positions. Thus, the plasma confining performances can be improved. (Moriyama, K.)

  11. Thermonuclear device

    International Nuclear Information System (INIS)

    Tezuka, Masaru.

    1993-01-01

    Protrusions and recesses are formed to a vacuum vessel and toroidal magnetic coils, and they are engaged. Since the vacuum vessel is generally supported firmly by a rack or the like by support legs, the toroidal magnetic field coils can be certainly supported against tumbling force. Then, there can be attained strong supports for the toroidal magnetic field coils, in addition to support by wedges on the side of inboard and support by share panels on the side of outboard, capable of withstanding great electromagnetic forces which may occur in large-scaled next-generation devices. That is, toroidal magnetic field coils excellent from a view point of deformation and stress can be obtained, to provide a thermonuclear device of higher reliability. (N.H.)

  12. Thermonuclear device

    International Nuclear Information System (INIS)

    Oosaki, Osamu; Masuda, Kenju.

    1980-01-01

    Purpose: To provide excellent electric properties and high reliability in a thermonuclear device by improving a current collecting board connected to a coil device. Constitution: A current collecting board element perforated with an opening for enserting a connecting terminal is sized to be inserted into a plating tank, and is surface treated in the plating tank. Only the current collecting board element preferably surface treated is picked up. A plurality of such current collecting board elements are connected and welded to form a large current collecting board. In this manner, the current collecting board having several m 2 to several ten order m 2 in area can be obtained as preferably surface treated at the connecting terminal hole. The current collecting board element can be determined in shape with the existing facility without increasing the size of a surface treating tank. (Kamimura, M.)

  13. Clamping device

    International Nuclear Information System (INIS)

    Schuengel, P.

    1976-01-01

    Device for prestressing a multiplicity of screw bolts sitting on a hole circle, where a carrying ring is provided which is supported on the flange of the pressure vessel of a nuclear reactor, and where on the carrying ring a hydraulic cylinder is arranged the force of which is to be guided into the screw bolt over an auxiliary bolt which may be coupled to the screw bolt. (orig./TK) [de

  14. "Distinvar" device

    CERN Multimedia

    CERN PhotoLab

    1965-01-01

    The alignment of one of the accelerator magnets being checked by the AR Division survey group. A "distinvar" device, invented by the group, using calibrated invar wires stretched between the fixed survey pillar (on the left) and a fixed point on the magnet. In two days it is thus possible to measure the alignment of the 100 magnets with an accuracy better than 1/10.

  15. Latching device

    Science.gov (United States)

    Ulrich, G. W. (Inventor)

    1975-01-01

    A latching device is suited for use in establishing a substantially motionless connection between a stationary receiver and a movable latching mechanism. The latching mechanism includes a pivotally supported restraining hook continuously urged into a capturing relationship with the receiver, characterized by a spring-biased pawl having a plurality of aligned teeth. The teeth are seated in the surface of the throat of the hook and positionable into restraining engagement with a rigid restraining shoulder projected from the receiver.

  16. Micro-computed tomographic analysis of the root canal morphology of the distal root of mandibular first molar.

    Science.gov (United States)

    Filpo-Perez, Carolina; Bramante, Clovis Monteiro; Villas-Boas, Marcelo Haas; Húngaro Duarte, Marco Antonio; Versiani, Marco Aurélio; Ordinola-Zapata, Ronald

    2015-02-01

    The aim of this study was to evaluate the morphologic aspects of the root canal anatomy of the distal root of a mandibular first molar using micro-computed tomographic analysis. One-hundred distal roots of mandibular first molars were scanned using a micro-computed tomographic device at an isotropic resolution of 19.6 μm. The percentage frequency distribution of the morphologic configuration of the root canal was performed according to the Vertucci classification system. Two-dimensional parameters (area, perimeter, roundness, aspect ratio, and major and minor diameters) and the cross-sectional shape of the root canal were analyzed in the apical third at every 1-mm interval from the main apical foramen in roots presenting Vertucci types I and II configurations (n = 79). Data were statistically compared using the Kruskal-Wallis and Dunn tests with a significance level set at 5%. Seventy-six percent of the distal roots had a single root canal. Two, three, and four canals were found in 13%, 8%, and 3% of the sample, respectively. In 13 specimens, the configuration of the root canal did not fit into Vertucci's classification. Overall, 2-dimensional parameter values significantly increased at the 3-mm level (P < .05). The prevalence of oval canals was higher at the 1-mm level and decreased at the 5-mm level in which long oval and flattened canals were more prevalent. The distal roots of the mandibular first molars showed a high prevalence of single root canals. The prevalence of long oval and flattened canals increased in the coronal direction. In 13% of the samples, canal configurations that were not included in Vertucci's configuration system were found. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  17. Biomechanics of the Proximal Radius Following Drilling of the Bicipital Tuberosity to Mimic Cortical Button Distal Biceps Repair Technique.

    Science.gov (United States)

    Oak, Nikhil R; Lien, John R; Brunfeldt, Alexander; Lawton, Jeffrey N

    2017-03-01

    A fracture through the proximal radius is a theoretical concern after cortical button distal biceps fixation in an active patient. The permanent, nonossified cortical defect and medullary tunnel is at risk during a fall eliciting rotational and compressive forces. We hypothesized that during simulated torsion and compression, in comparison with unaltered specimens, the cortical button distal biceps repair model would have decreased torsional and compressive strength and would fracture in the vicinity of the bicipital tuberosity bone tunnel. Sixteen fourth-generation composite radius Sawbones models were used in this controlled laboratory study. A bone tunnel was created through the bicipital tuberosity to mimic the exact bone tunnel, 8 mm near cortex and 3.2 mm far cortex, made for the BicepsButton distal biceps tendon repair. The radius was then prepared and mounted on either a torsional or compression testing device and compared with undrilled control specimens. Compression tests resulted in average failure loads of 9015.2 N in controls versus 8253.25 N in drilled specimens ( P = .074). Torsional testing resulted in an average failure torque of 27.3 Nm in controls and 19.3 Nm in drilled specimens ( P = .024). Average fracture angle was 35.1° in controls versus 21.1° in drilled. Gross fracture patterns were similar in compression testing; however, in torsional testing all fractures occurred through the bone tunnel in the drilled group. There are weaknesses in the vicinity of the bone tunnel in the proximal radius during biomechanical stress testing which may not be clinically relevant in nature. In cortical button fixation, distal biceps repairs creates a permanent, nonossified cortical defect with tendon interposed in the bone tunnel, which can alter the biomechanical properties of the proximal radius during compressive and torsional loading.

  18. Repair of chronic distal biceps brachii tendon rupture using free autogenous semitendinosus tendon.

    Science.gov (United States)

    Hang, D W; Bach, B R; Bojchuk, J

    1996-02-01

    Distal biceps brachii tendon ruptures occur much less frequently than do their proximal counterparts. Distal tendon ruptures usually are associated with considerable function deficits and may require surgical treatment. Repair of chronic distal biceps brachii ruptures are extremely unusual. A free autogenous semitendinosus tendon graft was used to reconstruct the distal biceps tendon by reattaching the graft to the radial tuberosity via a 2-incision technique in a patient with symptoms and a chronic injury.

  19. Minimally invasive osteosynthesis of distal tibial fractures using anterolateral locking plate: Evaluation of results and complications

    OpenAIRE

    Lakhotia, Devendra; Sharma, Gaurav; Khatri, Kavin; Kumar, G.N. Kiran; Sharma, Vijay; Farooque, Kamran

    2016-01-01

    Purpose Soft tissue healing is of paramount importance in distal tibial fractures for a successful outcome. There is an increasing trend of using anterolateral plate due to an adequate soft tissue cover on anterolateral distal tibia. The aim of this study was to evaluate the results and complications of minimally invasive anterolateral locking plate in distal tibial fractures. Methods This is a retrospective study of 42 patients with distal tibial fractures treated with minimally invasive ant...

  20. Forensics mobile devices

    Directory of Open Access Journals (Sweden)

    Milorad S. Markagić

    2013-02-01

    Full Text Available The article gives an overview of possibilities of digitized mobile(portable devices, and methods of research data with them.Emphasis is placed on the forensic investigation of mobilephones, but are covered by other media and research for digitalprocessing, transmission and storage of information.A special emphasis was made on the software tools in carrying out the acquisition of digital data, with the aim of sending the reader on ways and methods to protect data but also knowledgewhich is the same all be found and how they can be misused for criminal purposes

  1. Retrograde nailing for distal femur fractures in the elderly

    Directory of Open Access Journals (Sweden)

    Giddie Jasdeep

    2015-01-01

    Full Text Available Introduction: We report the results of treating a series of 56 fractures in 54 elderly patients with a distal femur fracture with a retrograde femoral nail. Methods: Fifty-four of the nails were inserted percutaneously with a closed reduction. After surgery all patients were allowed to weight bear as tolerated. Four fractures were supported in a temporary external splint. Results: The mean age of patients was 80.6 years (range 51–103 years, 52/54 (96% were females. There were no cases of nail related complications and no re-operations were required. One patient was lost to follow up. The 30-day mortality was 5/54 (9.3% and the one year mortality was 17/54 (31.5%. Conclusions: Distal femoral nail fixation provides a good method of fixation allowing immediate mobilisation for this group of patients.

  2. Unravelling intention: distal intentions increase the subjective sense of agency.

    Science.gov (United States)

    Vinding, Mikkel C; Pedersen, Michael N; Overgaard, Morten

    2013-09-01

    Experimental studies investigating the contribution of conscious intention to the generation of a sense of agency for one's own actions tend to rely upon a narrow definition of intention. Often it is operationalized as the conscious sensation of wanting to move right before movement. Existing results and discussion are therefore missing crucial aspects of intentions, namely intention as the conscious sensation of wanting to move in advance of the movement. In the present experiment we used an intentional binding paradigm, in which we distinguished between immediate (proximal) intention, as usually investigated, and longer standing (distal) intention. The results showed that the binding effect was significantly enhanced for distal intentions compared to proximal intentions, indicating that the former leads to stronger sense of agency. Our finding provides empirical support for a crucial distinction between at least two types of intention when addressing the efficacy of conscious intentions. Copyright © 2013 Elsevier Inc. All rights reserved.

  3. Pendulum Therapy of Molar Distalization in Mixed Dentition.

    Science.gov (United States)

    Patil, Raju Umaji; Prakash, Amit; Agarwal, Anshu

    2016-01-01

    Early and timely pedo-orthodontic treatment is aimed at eliminating the disturbances of skeletal or dentoalveolar development, to harmonize the stomatognathic system before the full eruption of all permanent teeth. The advantages of pendulum appliance are its minimal dependence on patient's compliance (child cooperation), ease of fabrication, onetime activation and adjustment of the springs if necessary to correct minor transverse and vertical molar positions. This article reports a successful treatment method of class II malocclusion with pendulum appliance in mixed dentition phase. Distalization of maxillary molar was done, followed by guidance of canine impaction orthodontically and other dental correction using 0.022 MBT appliances. Posttreatment results were stable and remarkable. How to cite this article: Patil RU, Prakash A, Agarwal A. Pendulum Therapy of Molar Distalization in Mixed Dentition. Int J Clin Pediatr Dent 2016;9(1):67-73.

  4. A Triplane Fracture of The Distal Femoral Epiphysis. RA Gosselin et ...

    African Journals Online (AJOL)

    user

    2005-12-02

    Dec 2, 2005 ... triplane fracture was described for the distal tibial physis, and is presumed to result from a combination of shear and rotational stresses on the incompletely fused growth plate15,16. Triplane fractures have also been described for other epiphyses: proximal tibia17, distal humerus18, distal radius19, and in ...

  5. Impact of a Nationwide Training Program in Minimally Invasive Distal Pancreatectomy (LAELAPS)

    NARCIS (Netherlands)

    de Rooij, Thijs; van Hilst, Jony; Boerma, Djamila; Bonsing, Bert A.; Daams, Freek; van Dam, Ronald M.; Dijkgraaf, Marcel G.; van Eijck, Casper H.; Festen, Sebastiaan; Gerhards, Michael F.; Koerkamp, Bas Groot; van der Harst, Erwin; de Hingh, Ignace H.; Kazemier, Geert; Klaase, Joost; de Kleine, Ruben H.; van Laarhoven, Cornelis J.; Lips, Daan J.; Luyer, Misha D.; Molenaar, I. Quintus; Patijn, Gijs A.; Roos, Daphne; Scheepers, Joris J.; van der Schelling, George P.; Steenvoorde, Pascal; Vriens, Menno R.; Wijsman, Jan H.; Gouma, Dirk J.; Busch, Olivier R.; Hilal, Mohammed Abu; Besselink, Marc G.; de Boer, Marieke T.

    2016-01-01

    Objective:To study the feasibility and impact of a nationwide training program in minimally invasive distal pancreatectomy (MIDP).Summary of Background Data:Superior outcomes of MIDP compared with open distal pancreatectomy have been reported. In the Netherlands (2005 to 2013) only 10% of distal

  6. Cost-effectiveness of laparoscopic versus open distal pancreatectomy for pancreatic cancer

    NARCIS (Netherlands)

    Gurusamy, Kurinchi Selvan; Riviere, Deniece; van Laarhoven, C. J. H.; Besselink, Marc; Abu-Hilal, Mohammed; Davidson, Brian R.; Morris, Steve

    2017-01-01

    A recent Cochrane review compared laparoscopic versus open distal pancreatectomy for people with for cancers of the body and tail of the pancreas and found that laparoscopic distal pancreatectomy may reduce the length of hospital stay. We compared the cost-effectiveness of laparoscopic distal

  7. Dual-port distal gastrectomy for the early gastric cancer

    OpenAIRE

    Kashiwagi, Hiroyuki; Kumagai, Kenta; Monma, Eiji; Nozue, Mutsumi

    2014-01-01

    Background Although recent trends in laparoscopic procedures have been toward minimizing the number of incisions, four or five ports are normally required to complete laparoscopic gastrectomy because of the complexity of this procedure. Multi-channel ports, such as the SILS port (Covidien, JAPAN), are now available and are crucial for performing single-incision laparoscopic surgery (SILS) or reduced port surgery (RPS). We carried out reduced port distal gastrectomy (RPDG) using a dual-port me...

  8. DISTAL SPLENORENAL VENOUS ANASTOMOSIS IN TREATMENT OF DIABETES MELLITUS

    Directory of Open Access Journals (Sweden)

    T. I. Shraer

    2010-01-01

    Full Text Available We studied the outcomes of the operations for distal splenorenal venous anastomosis of 134 patients with type 1 diabetes mellitus. We have noticed the significant improvement of patient’s general condition due to spasmolytic effect of glucagon, bypassed to blood circulation without coming through liver and also a stabilization of glyce- mia because of a restoration of insulin-glucagon ratio in systemic circulation. The effect of a surgery depends on a stage of microangiopathy and nephrosclerosis. 

  9. Anatomical Measurements of the Distal Clavicle in a Kenyan ...

    African Journals Online (AJOL)

    The superoinferior thickness of the distal end was measured using a vernier caliper. The mean clavicle length was 148.57±12.63mm. The left clavicle was longer (150.4mm) than the right one (146.8mm). Conoid tubercle (CT) and trapezoid tuberosity (TT) were 39.52±5.93mm and 17.96±3.42mm respectively from the lateral ...

  10. Haematoma block in reduction of distal radial fractures

    African Journals Online (AJOL)

    radiale distale déplace'e entre janvier 2000 et mars 2001 avaient la reduction de la fracture sous l'obstruction he'matome tout en utili- sant 10ml de 2% lignocaine. ' H y avait une remise importante de la douleur a la suite d'in- filtration de la lignocaine sous la région de la fracture et un soula- gement important au cours de ...

  11. FUNCTIONAL OUTCOMES AFTER DISTAL BICEPS BRACHII REPAIR: A CASE SERIES.

    Science.gov (United States)

    Redmond, Christine L; Morris, Tim; Otto, Charissa; Zerella, Tanisha; Semmler, John G; Human, Taaibos; Phadnis, Joideep; Bain, Gregory I

    2016-12-01

    To investigate outcomes after surgical repair of distal biceps tendon rupture and the influence of arm dominance on isokinetic flexion and supination results. While relatively uncommon, rupture of the distal biceps tendon can result in significant strength deficits, for which surgical repair is recommended. The purpose of this study was to assess patient reported functional outcomes and muscle performance following surgery. A sample of 23 participants (22 males, 1 female), who had previously undergone surgical repair of the distal biceps tendon, were re-examined at a minimum of one year after surgery. Biodex isokinetic elbow flexion and supination testing was performed to assess strength (as measured by peak torque) and endurance (as measured by total work and work fatigue). The Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH) and Mayo Elbow Performance Scale (MEPS) were used to assess participants' subjectively reported functional recovery. At a mean of 7.6 years after surgical repair, there were no differences between the repaired and uninvolved elbows in peak torque ( p  = 0.47) or total work ( p  = 0.60) for flexion or supination. There was also no difference in elbow flexion work fatigue ( p  = 0.22). However, there was significantly less work fatigue in supination, which was likely influenced by arm dominance, as most repairs were to the dominant arm, F (1,22)=5.67, p  = 0.03. The long-term strength of the repaired elbow was similar to the uninvolved elbow after surgery to the distal biceps tendon. Endurance of the repaired elbow was similar in flexion but greater in supination, probably influenced by arm dominance. Retrospective case series. Level 4.

  12. Squamous Cell Carcinoma of the Distal Common Bile Duct

    OpenAIRE

    Jain A; Juneja M; Naik S; Sharma S; Kapoor S; Sewkani A; Varshney S

    2005-01-01

    CONTEXT: Squamous cell carcinoma of the biliary tree is rare. Although few cases of squamous cell carcinoma of the intrahepatic bile-duct and gallbladder have been reported, until today, only four cases of squamous cell carcinoma of the extrahepatic bile duct have been reported in the literature. CASE REPORT: We present a case of squamous cell carcinoma of the distal common bile duct presenting with obstructive jaundice in a 60-year-old male which was successfully managed by a Whipple's pancr...

  13. Characterisation of osseous bodies of the distal phalanx of foals

    International Nuclear Information System (INIS)

    Kaneps, A.J.; O'Brien, T.R.; Redden, R.F.; Stover, S.M.; Pool, R.R.

    1993-01-01

    The distal phalanx and metacarpal physis of both forelimbs of 32 Thoroughbred foals 3-32 weeks of age were radiographed to identify those limbs with osseous bodies at a palmar process (PP) of the distal phalanx. Osseous bodies (ossicles) were identified radiographically in 19% of the foals. Sixteen of the 32 foals were selected for microradiographic and histological evaluation: 6 foals with radiographic evidence of ossicles and 10 foals without. Fourteen ossicles of the PP were observed radiographically. Ossicles were either a triangular bone fragment at the palmar aspect of the distal angle of the PP, or an oblong bone fragment separated from P3 by a radiolucent line extending 1-3 cm from the incisure of the PP to the solar margin. One foal had radiographic evidence of bilateral distal metacarpal physitis. Seventeen of 35 PPs examined microradiographically were considered normal, in that the dorsal and solar cortices were thin with trabecular bone orientated parallel to the cortical surfaces, and there was a depression in the dorsal cortical surface (i.e. parietal sulcus). Abnormal microradiographic findings in the other 18 PPs included a fracture line extending from the dorsal cortical surfaces and trabecular bridging of the fracture gap. The fracture line was often continuous with the parietal sulcus. Microradiographic evidence of a fracture was found in 75% of foals evaluated. Normal histological findings in 16 PPs included thin dorsal and solar cortices with trabeculae orientated parallel to the cortical surfaces, parallel-fibred dense connective tissue attachments of the deep digital flexor tendon to the solar cortical surfaces, and a neurovascular bundle associated with the parietal sulcus

  14. Transosseous-Equivalent Repair for Distal Patellar Tendon Avulsion

    OpenAIRE

    Galos, David K.; Konda, Sanjit R.; Kaplan, Daniel J.; Ryan, William E.; Alaia, Michael J.

    2016-01-01

    Extensor mechanism disruptions are relatively uncommon injuries involving injury to the quadriceps tendon, patella, or patellar tendon. Patellar tendon avulsions from the tibial tubercle in adults are rare; as such, little technical information has been written regarding surgical management of this injury in the adult. Transosseous-equivalent repairs have been described in the management of several types of tendon ruptures, including rotator cuff and distal triceps tendon ruptures, but not pr...

  15. The most preferable method for distal hypospadias surgery: TIPU Technique

    OpenAIRE

    ARSLAN, Mehmet Şerif; KÖKSAL, Ersin; YILDIZ, Turan; ÖZALP, Leyla TEKŞAN; KAYA, Cengiz

    2013-01-01

    The purpose of this study is to demonstrate the efficiency of tubularized incised-plate urethroplasty (TIPU) method and the complication rates with postoperative early periodical urethral dilatations. Hypospadias is one of the most common congenital anomaly in male genital system. Retrospectively 45 case’s records which had distal hypospadias and undergone surgery were studied in Samsun Obstetrics and Gynecology and Children’s Hospital. The ages of the patients, their meatus locations, cordi ...

  16. Hereditary distal spinal muscular atrophy with vocal cord paralysis.

    OpenAIRE

    Young, I D; Harper, P S

    1980-01-01

    A large kindred is described in which an unusual form of spinal muscular atrophy is segregating in an autosomal dominant manner. The disease presents most commonly in the teens with small muscle wasting in the hands, particularly involving median nerve musculature. Subsequently distal muscle wasting and weakness occur in the lower limbs. Vocal cord paralysis is a characteristic and potentially hazardous feature. No previous report of this condition has been found.

  17. Epidemiology of distal forearm fractures in Oslo, Norway.

    Science.gov (United States)

    Lofthus, C M; Frihagen, F; Meyer, H E; Nordsletten, L; Melhuus, K; Falch, J A

    2008-06-01

    The population of Oslo has the highest incidence of hip fracture reported. The present study shows that the overall incidence of distal forearm fractures in Oslo is higher than in other countries and has not changed significantly when comparing the incidence of 1998/99 with 1979. The population of Oslo has the highest incidence of hip fracture reported. The present study reports the incidence of distal forearm fracture in Oslo and the fracture rates of immigrants. Patients aged > or = 20 years resident in Oslo sustaining a distal forearm fracture in a one-year period in 1998/99 were identified using electronic diagnosis registers, patient protocols, and/or X-ray registers of the clinics in Oslo. Medical records were obtained and the diagnosis verified. The age- and sex-specific incidence rates were calculated and compared with those for 1979. Data on immigrant category and country of origin of the patients were obtained. The age-adjusted fracture rates per 10,000 for the age group > or = 50 years were 109.8 and 25.4 in 1998/99 compared with 108.3 and 23.5 in 1979 for women and men, respectively (n.s.). The relative risk of fracture in Asians was 0.72 (95% CI 0.53-1.00) compared with ethnic Norwegians. The overall incidence of distal forearm fractures in Oslo is higher than in other countries and has not changed significantly when comparing the incidence of 1998/99 with 1979. Furthermore, the present data suggest that Asian immigrants in Oslo have a slightly lower fracture risk than ethnic Norwegians.

  18. A new total distal radioulnar joint prosthesis: functional outcome.

    Science.gov (United States)

    Schuurman, Arnold H; Teunis, Teun

    2010-10-01

    To present the evolution of design and the short-term functional outcome of our distal radioulnar joint (DRUJ) prosthesis. This total DRUJ prosthesis differs from others in that it consists of 2 parts and attains bony fixation by its hydroxyapatite coating. Nineteen patients received a DRUJ prosthesis after a failed Darrach procedure (n = 10), Sauvé-Kapandji procedure (n = 7), trauma (n = 1), or DRUJ synovitis (n = 1). Indications for the placement were decreased grip, decreased forearm motion, and pain due to ulnar impingement syndrome and instability of the distal ulna. Seven prostheses were removed, 5 due to loosening, 1 due to continuing pain, and 1 at the request of the patient. The 5 prostheses that loosened were an intermediate prototype no longer in use. In 12 remaining cases, range of motion, grip strength, and pinch strength were measured, and patients completed the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. Pain was assessed with the visual analog scale (range, 0-10). A paired t-test was performed to assess the significance of the difference between preoperative and postoperative measurements. Statistically significant improvements were seen in forearm pronation, from an average of 79° to 88°; grip strength, from an average of 10 kg to an average of 16 kg; and visual analog scale score, decreased from a mean of 5.3 to a mean of 3.5. The distal ulna was clinically stable in all 12 patients who retained the prosthesis. The intermediate prototype had a high failure rate, 5 out of 5. The early results for the current prosthesis prototype show clinical improvement. Based on these results, we conclude that this prosthesis offers a new treatment option for ulnar instability after distal ulnar resection. Therapeutic IV. Copyright © 2010. Published by Elsevier Inc.

  19. Minimally invasive plate osteosynthesis for distal radius fractures

    Directory of Open Access Journals (Sweden)

    Xu-ming Wei

    2014-01-01

    Full Text Available Background: Fractures of distal radius are common injury in all age groups. Cast treatment with or without close reduction is a viable option. However, the results are often unsatisfactory with restricted function. The open reduction and internal fixation often results in extensive soft tissue dissection and associated high rates of infection and delayed/nonunion. The distractor/external fixator have reported good functional and anatomical results but the incidence of pin traction infection nerve injury and cosmedic deformity are high. We introduced a modified operative technique for minimally invasive plate osteosynthesis (MIPO for distal radial fracture and evaluated the functional outcomes and complications. Materials and Methods: 22 distal radial fractures (10 left, 12 right were treated using the MIPO technique and two small incisions with a palmar locking plate from August 2009 to August 2010. The wrist function was assessed according to Dienst wrist rating system, and postoperative complications were recorded. Results: According to Dienst wrist rating system, 13 patients showed excellent results, 6 cases showed good results and 3 patients had moderate results. No patient had poor results. Thus, the excellent and good rate was 86.4%. One patient had anesthesia in the thenar eminence and this symptom disappeared after 3 months. One patient had delayed healing in the proximal wrist crease. Two patients had mild pain on the ulnar side of the wrist and two patients had limited wrist joint function. Conclusion: The MIPO technique by using two small palmar incisions is safe and effective for treatment of distal radial fractures.

  20. External jig in the placement of distal interlocking screws | Ikem ...

    African Journals Online (AJOL)

    Retrograde (52.2%) was the commonest surgical approach used for femur. The main indication for SIGN interlocking surgery was recent fracture 77.8%. Open reduction 97.8% was the commonest method of reduction used. The mean±SD bone union time was 3.58±0.56 months and range 3-5 months. Distal screw insertion ...

  1. Equine distal limb wounds: new and emerging treatments.

    Science.gov (United States)

    Alford, Christopher G; Caldwell, Fred J; Hanson, Reid

    2012-07-01

    Distal limb wounds occur commonly in horses, and treatment can be frustrating for owners and veterinarians. Caring for these wounds is often very expensive, labor intensive, and prolonged. Many commercial products and clinical techniques have been developed to help treat these wounds. Healing of these wounds depends on many factors. With proper wound evaluation and treatment, affected horses can return to function sooner than in the past.

  2. Radiation protection

    International Nuclear Information System (INIS)

    Koelzer, W.

    1975-01-01

    Physical and radiological terms, quantities, and units. Basic principles of radiation protection (ICRP, IAEA, EURATOM, FRG). Biological effects of ionizing radiation. Objectives of practical radiation protection. (HP) [de

  3. Retrograde Tibial Nailing: a minimally invasive and biomechanically superior alternative to angle-stable plate osteosynthesis in distal tibia fractures

    Science.gov (United States)

    2014-01-01

    Background Currently, antegrade intramedullary nailing and minimally invasive plate osteosynthesis (MIPO) represent the main surgical alternatives in distal tibial fractures. However, neither choice is optimal for all bony and soft tissue injuries. The Retrograde Tibial Nail (RTN) is a small-caliber prototype implant, which is introduced through a 2-cm-long incision at the tip of the medial malleolus with stab incisions sufficient for interlocking. During this project, we investigated the feasibility of retrograde tibial nailing in a cadaver model and conducted biomechanical testing. Methods Anatomical implantations of the RTN were carried out in AO/OTA 43 A1-3 fracture types in three cadaveric lower limbs. Biomechanical testing was conducted in an AO/OTA 43 A3 fracture model for extra-axial compression, torsion, and destructive extra-axial compression. Sixteen composite tibiae were used to compare the RTN against an angle-stable plate osteosynthesis (Medial Distal Tibial Plate, Synthes®). Statistical analysis was performed by Student's t test. Results Retrograde intramedullary nailing is feasible in simple fracture types by closed manual reduction and percutaneous reduction forceps, while in highly comminuted fractures, the use of a large distractor can aid the reduction. Biomechanical testing shows a statistically superior stability (p nail meets the requirements of maximum soft tissue protection by a minimally invasive surgical approach with the ability of secure fracture fixation by multiple locking options. Retrograde tibial nailing with the RTN is a promising concept in the treatment of distal tibia fractures. PMID:24886667

  4. Analysis of preoperative antibiotic prophylaxis in stented, distal hypospadias repair.

    Science.gov (United States)

    Smith, Jacob; Patel, Ashay; Zamilpa, Ismael; Bai, Shasha; Alliston, Jeffrey; Canon, Stephen

    2017-04-01

    Surgical site infection [SSI] is a risk for any surgical procedure, including hypospadias repair. Prophylactic antibiotic therapy for patients having surgery is often effective in preventing SSIs, but with increasing rates of antibiotic resistance, this practice has been questioned. The objectives of this study are 1) to assess the incidence of SSIs in patients following stented, distal hypospadias repair and 2) to observe for any potential difference in the incidence of SSIs for patients with and without preoperative antibiotic utilization in this setting. We retrospectively reviewed consecutive patients treated with stented, distal hypospadias repair from 2011 to 2014 by three surgeons and compared two groups: patients who received preoperative antibiotics and patients who did not. Patients with a history of previous hypospadias repair were excluded from the study. Two hundred twenty-four subjects were identified. Group 1 (135) received preoperative antibiotic and Group 2 (89) did not receive preoperative antibiotics. There was no statistically significant difference in SSI prevalence with 0 patients in Group 1 and 1 patient in Group 2 having a SSI. Although prophylactic antibiotics prior to hypospadias repair are most often used by pediatric urologists, this study demonstrates further evidence that antibiotics prior to this procedure do not appear to lower the rate of SSI. This study is limited by its retrospective nature and disparate mean follow up in the two cohorts. Surgical site infection does not appear to be decreased by prophylactic antibiotic therapy before distal hypospadias repair.

  5. Distal biceps brachii tendon anatomy revisited from a surgical perspective.

    Science.gov (United States)

    Fogg, Quentin A; Hess, Benjamin R; Rodgers, K Gary; Ashwood, Neil

    2009-04-01

    The distal biceps brachii tendon is commonly susceptible to traumatic injury. This study aimed to describe the morphology of the distal biceps brachii tendon in relation to the commonly used endobutton repair of tendon rupture. The results suggested that the distal tendon is a series of distinct bands of variable number. These bands are obscured surgically by the tendon sheath. Upon opening this sheath, blunt dissection of the tendon released fibrous connections between the tendon bands. Adjacent bands were variably connected via small oblique bands. The separations between bands were continuous onto the radius. They were therefore considered as separate force-conducting units. This notion is of high relevance to endobutton repairs, as the sutures are typically only passed through the margins of the tendon. Where few connections exist between tendinous bands, this represents a potential weakness, as central bands are therefore free to be pulled proximally. This is of primary concern in the early rehabilitative stages of postoperative care. It may be suggested that sutures that cross the width of the tendon will eliminate the give of central bands, improving postoperative results, reducing revision numbers, and potentially reducing rehabilitation time. (c) 2009 Wiley-Liss, Inc.

  6. Laparoscopic distal pancreatectomy for adenocarcinoma of the pancreas

    Science.gov (United States)

    Björnsson, Bergthor; Sandström, Per

    2014-01-01

    Since the first report on laparoscopic distal pancreatectomy (LDP) appeared in the 1990s, the procedure has been performed increasingly frequently to treat both benign and malignant lesions of the pancreas. Many earlier publications have shown LDP to be a good alternative to open distal pancreatectomy for benign lesions, although this has never been studied in a prospective, randomized manner. The evidence for the use of LDP to treat adenocarcinoma of the pancreas is not as well established. The purpose of this review is to evaluate the current evidence for LDP in cases of pancreatic adenocarcinoma. We conducted a review of English language publications reporting LDP results between 1990 and 2013. All studies reporting results in patients with histologically proven pancreatic adenocarcinoma were included. Thirty-nine publications were found and included in the results for a total of 309 cases of pancreatic adenocarcinoma (potential double publications were not eliminated). Most LDP procedures are performed in selected cases and generally involve smaller tumors than open distal pancreatectomy (ODP) procedures. Some of the papers report unselected cases and include procedures on larger tumors. The number of lymph nodes harvested using LDP is comparable to the number obtained with ODP, as is the frequency of R0 resections. Current data suggest that similar short term oncological results can be obtained using LDP as those obtained using ODP. PMID:25309072

  7. Importance of early audiologic assessment in distal renal tubular acidosis

    Directory of Open Access Journals (Sweden)

    Elizabeth Norgett

    2010-12-01

    Full Text Available Anand P Swayamprakasam1, Elizabeth Stover1, Elizabeth Norgett1, Katherine G Blake-Palmer1, Michael J Cunningham2, Fiona E Karet11Department of Medical Genetics, Cambridge Institute for Medical Research, Cambridge, UK; 2Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, MA, USAAbstract: Autosomal recessive distal renal tubular acidosis is usually a severe disease of childhood, often presenting as failure to thrive in infancy. It is often, but not always, accompanied by sensorineural hearing loss, the clinical severity and age of onset of which may be different from the other clinical features. Mutations in either ATP6V1B1 or ATP6V0A4 are the chief causes of primary distal renal tubular acidosis with or without hearing loss, although the loss is often milder in the latter. We describe a kindred with compound heterozygous alterations in ATP6V0A4, where hearing loss was formally diagnosed late in both siblings such that they missed early opportunities for hearing support. This kindred highlights the importance of routine audiologic assessments of all children with distal renal tubular acidosis, irrespective either of age at diagnosis or of which gene is mutated. In addition, when diagnostic genetic testing is undertaken, both genes should be screened irrespective of current hearing status. A strategy for this is outlined.Keywords: sensorineural hearing loss, renal tubular acidosis, recessive, genetics, mutation

  8. Distal femoral complications following antegrade intramedullary nail placement

    Directory of Open Access Journals (Sweden)

    Amanda J. Fantry

    2015-03-01

    Full Text Available While antegrade nailing for proximal and diaphyseal femur fractures is a commonly utilized fixation method with benefits including early mobilization and high rates of fracture union, both intraoperative and postoperative complications may occur. Intraoperative errors include leg length discrepancy, anterior cortical perforation, malreduction of the fracture, and neurovascular injury, and postoperative complications include nonunion, malunion, infection, and hardware failure. This case series reviews complications affecting the distal femur after intramedullary nailing including fracture surrounding a distal femoral interlocking screw (Case #1, nonunion after dynamization with nail penetration into the knee joint (Case #2, and anterior cortical perforation (Case #3. Prevention of intraoperative and postoperative complications surrounding intramedullary nailing requires careful study of the femoral anatomy and nail design specifications (radius of curvature, consideration of the necessity of distal interlocking screws, the need for close radiographic follow-up after nail placement with X-rays of the entire length of the nail, and awareness of possible nail penetration into the knee joint after dynamization.

  9. Distal histidine conformational flexibility in dehaloperoxidase from Amphitrite ornata.

    Science.gov (United States)

    Chen, Zuxu; de Serrano, Vesna; Betts, Laurie; Franzen, Stefan

    2009-01-01

    The enzyme dehaloperoxidase (DHP) from the terebellid polychaete Amphitrite ornata is a heme protein which has a globin fold but can function as both a hemoglobin and a peroxidase. As a peroxidase, DHP is capable of converting 2,4,6-trihalophenols to the corresponding 2,6-dihaloquinones in the presence of hydrogen peroxide. As a hemoglobin, DHP cycles between the oxy and deoxy states as it reversibly binds oxygen for storage. Here, it is reported that the distal histidine, His55, exhibits conformational flexibility in the deoxy form and is consequently observed in two solvent-exposed conformations more than 9.5 A away from the heme. These conformations are analogous to the open conformation of sperm whale myoglobin. The heme iron in deoxy ferrous DHP is five-coordinate and has an out-of-plane displacement of 0.25 A from the heme plane. The observation of five-coordinate heme iron with His55 in a remote solvent-exposed conformation is consistent with the hypothesis that His55 interacts with heme iron ligands through hydrogen bonding in the closed conformation. Since His55 is also displaced by the binding of 4-iodophenol in an internal pocket, these results provide new insight into the correlation between heme iron ligation, molecular binding in the distal pocket and the conformation of the distal histidine in DHP.

  10. Distal histidine conformational flexibility in dehaloperoxidase from Amphitrite ornata

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Zuxu; de Serrano, Vesna; Betts, Laurie; Franzen, Stefan; (NCSU); (UNC)

    2009-01-28

    The enzyme dehaloperoxidase (DHP) from the terebellid polychaete Amphitrite ornata is a heme protein which has a globin fold but can function as both a hemoglobin and a peroxidase. As a peroxidase, DHP is capable of converting 2,4,6-trihalophenols to the corresponding 2,6-dihaloquinones in the presence of hydrogen peroxide. As a hemoglobin, DHP cycles between the oxy and deoxy states as it reversibly binds oxygen for storage. Here, it is reported that the distal histidine, His55, exhibits conformational flexibility in the deoxy form and is consequently observed in two solvent-exposed conformations more than 9.5 {angstrom} away from the heme. These conformations are analogous to the open conformation of sperm whale myoglobin. The heme iron in deoxy ferrous DHP is five-coordinate and has an out-of-plane displacement of 0.25 {angstrom} from the heme plane. The observation of five-coordinate heme iron with His55 in a remote solvent-exposed conformation is consistent with the hypothesis that His55 interacts with heme iron ligands through hydrogen bonding in the closed conformation. Since His55 is also displaced by the binding of 4-iodophenol in an internal pocket, these results provide new insight into the correlation between heme iron ligation, molecular binding in the distal pocket and the conformation of the distal histidine in DHP.

  11. Necessity for fibular fixation associated with distal tibia fractures.

    Science.gov (United States)

    Taylor, Benjamin C; Hartley, Brandi R; Formaini, Nathan; Bramwell, Thomas J

    2015-12-01

    Intramedullary (IM) nailing is a well-accepted treatment for distal third tibia fractures in combination with injury to the fibula. However, the indications for operative stabilisation of the fibula remain controversial. The authors performed a retrospective review on a consecutive series of patients who underwent intramedullary nailing of a non-comminuted distal third tibia fracture with or without fibular fixation at a Level I urban trauma centre. A review of surgical records identified 120 patients who initially were included in this study, while a total of 98 patients who met the inclusion criteria were included in the final analysis. Our results found no difference in the mean value of coronal and sagittal plane alignment in both the immediate post-operative and follow-up time periods. We also saw no statistically significant difference when comparing malalignment between patients treated with or without fibula fixation. There were no deep infections between the two groups. No significant differences were seen between the fibular fixation group and the non-fixation group. Distal screw removal due to prominence or pain was the most common reason for future surgery in both groups. These findings suggest that the addition of fibular fixation does not affect whether or not alignment is maintained in either the immediate post-operative or short-term follow-up period. Copyright © 2015 Elsevier Ltd. All rights reserved.

  12. Manometric and hormonal changes after distal partial gastrectomy.

    Science.gov (United States)

    Yamashita, Y; Inoue, H; Ohta, K; Yoshida, K; Miyahara, E; Hirai, T; Toge, T; Adrian, T E

    2000-04-01

    Alkaline oesophagitis attributable to duodenal mechanisms may induce oesophageal carcinogenesis in a rat reflux model. To investigate the mechanism of the regurgitation after distal partial gastrectomy. Oesophageal manometry was used in 16 patients before and after distal partial gastrectomy with reconstruction by Bilroth methods. Serum concentrations of four gastrointestinal hormones were measured by radioimmunoassay in 10 gastrectomy patients and nine healthy volunteers before and after a standardized meal. The lower oesophageal sphincter pressure was reduced to 83% after surgery. The amplitude and duration of the peristaltic waves tended to be increased, and the velocity tended to be less after surgery (amplitude 120%, duration 114%, velocity 88%). Interrupted waves appeared more frequently after surgery. The manometric changes in gastrectomized patients are considered to be disadvantageous relative to regurgitation. After surgery, gastrin and pancreatic polypeptide were completely abolished postprandially, whereas cholecystokinin and neurotensin were significantly increased. The hormonal changes should have a suppressive effect on the lower oesophageal sphincter. Both the manometric and the hormonal changes may exacerbate reflux oesophagitis after distal partial gastrectomy.

  13. A novel, new robotic platform for natural orifice distal pancreatectomy.

    Science.gov (United States)

    Thakkar, Shyam; Awad, Michael; Gurram, Krishna C; Tully, Steven; Wright, Cornell; Sanan, Siddharth; Choset, Howie

    2015-06-01

    Laparoendoscopic technology has revolutionized the practice of surgery; however, surgeons have not widely accepted laparoscopic techniques for pancreatic surgeries due to the complexity of the operation. Natural orifice transluminal endoscopic surgery (NOTES) offers a great new potential for pancreatic procedures, with early data showing benefits of reduced visible scarring and the potential for decreased wound infections, hernias, pain, and postoperative complications. However, there are significant limitations to the currently used flexible endoscopy tools, including a diminished visual field, spatial orientation and tissue manipulation issues, and 2-dimensional visual feedback. We have adopted a novel snake-like robot, the minimally invasive cardiac surgery (MICS) robot, which addresses these issues. In the current pilot study, the MICS robot was evaluated for transrectal distal pancreas exploration and resection in 2 nonsurvival porcine models. Abdominal navigation and accessing the pancreas was investigated in the first pig, and based on its success, pancreas resection was studied in pig 2. The MICS robot was successful in accessing and visualizing the right upper, left upper, and left lower quadrants of the abdomen in pig 1 and was able to perform a successful complex NOTES procedure with distal pancreas resection in pig 2, with only minimal laparoscopic retraction assistance. In conclusion, preliminary results showing the MICS robot in natural orifice distal pancreatectomy are positive. Enhancements to optics and instrumentation will help further increase the usability in pancreatic interventions. Future indications may include transgastric NOTES approaches, endoluminal procedures, and single-port applications. © The Author(s) 2014.

  14. Safety in Cryogenics – Safety device sizing

    CERN Multimedia

    CERN. Geneva

    2016-01-01

    The calculation is separated in three operations: o The estimation of the loads arriving on the component to protect, o The calculation of the mass flow to evacuate, o And the sizing of the safety device.

  15. Thermonuclear device

    International Nuclear Information System (INIS)

    Inoue, Toyokazu; Murata, Toru.

    1983-01-01

    Purpose: To shield superconducting coils for use in the generation of magnetic field against neutron irradiation thereby preventing tritium contamination. Constitution: The thermonuclear device comprises, in its inside, a vacuum container for containing plasmas, superconducting coils disposed to the outside of the vacuum container and neutron absorbers disposed between the super-conducting coils and the vacuum container. since neutrons issued from the plasma are absorbed by neutron absorbers and not irradiated to the superconducting coils, generation of tritium due to the reaction between 3 He in the liquid helium as the coolants for the super-conducting coils and the neutrons is prevented. (Aizawa, K.)

  16. To fix or not to fix? The role of fibular fixation in distal shaft fractures of the leg.

    Science.gov (United States)

    Berlusconi, M; Busnelli, L; Chiodini, F; Portinaro, N

    2014-02-01

    The role of stabilisation of the fibula in distal two-bone fractures of the leg is controversial. Some studies indicate the need for fibular stabilisation in 43 AO fractures, but few studies consider the role of the fibula in 42 AO fractures. The aim of the current paper is to explain the role of stabilisation of the fibula in 42 AO fractures, correlating the rates of healing and non-union between patients with and without fibula fixation. A total of 60 patients with 42 AO (distal) shaft fracture of the tibia with associated fracture of the fibula were selected. Patients were divided into two groups according to whether or not the fibula was fixed: Group I (n=26) comprised patients who had their fibula fixed while Group II (n=34) comprised patients who did not. The fibular fracture was classified according to the AO and related to the level of the tibial fracture. Other parameters examined were the union rate of the two groups correlated to the fracture pattern and position of the fibular fracture; the demographic data, such as age and gender; the presence of an open fracture, and the type of tibial fixation device used (nail or plate). None of the parameters considered (open injury, AO classification, device used and level of the fibular fracture relative to the tibial) were shown to have an influence on the development of a non-union. This study showed a higher non-union rate when the fracture of the tibia and fibula were at the same level, the tibia was fixed with a bridging plate and the fibula left untouched. For this reason, we recommend fibular fixation in all 42 distal fractures when both fractures lie on the same plane and the tibial fracture is relatively stabilised. Copyright © 2013 Elsevier Ltd. All rights reserved.

  17. Radiation-induced cerebrovasculopathy of the distal middle cerebral artery and distal posterior cerebral artery. Case report

    International Nuclear Information System (INIS)

    Hasegawa, Shu; Hamada, Jun-ichiro; Morioka, Motohiro; Kai, Yutaka; Hashiguchi, Akihito; Ushio, Yukitaka

    2000-01-01

    A 15-year-old girl underwent partial removal of a pituitary adenoma followed by local irradiation of the brain with a total of 70 Gy through two lateral opposing ports. Twenty years later, she experienced frequent transient ischemic attacks with left sensory disturbance. Cerebral angiography revealed stenoses of the right distal middle cerebral artery (MCA) and the right distal posterior cerebral artery without net-like vessels. There was a severe decrease of vasoreactivity in the right hemisphere. Right superficial temporal artery (STA)-MCA anastomosis was performed. Her neurological deficits were resolved and perfusion reserve capacity had markedly improved 6 months later. We recomment STA-MCA anastomosis in such cases. (author)

  18. [Results After Distal Digital Replantation - Is It Worth The Effort?

    Science.gov (United States)

    Braig, David; Thiele, Jan R; Penna, Vincenzo; Stark, G Björn; Eisenhardt, Steffen U

    2017-02-01

    There are only relative indications for distal digital replantation in zones 1 and 2 according to Tamai. In contrast to primary closure for fingertip amputations, replantation is a complex procedure that requires skills in supermicrosurgical techniques, as vessels with diameters between 0.3-0.8 mm are connected. In addition the time spent in hospital and the time off from work are longer. Distal digital replantation is thus only indicated, if the expected functional and aesthetic benefits surmount those of primary closure. We retrospectively analysed all fingertip amputations in zone 1 and 2 according to Tamai between 9/2009 and 7/2014 where we attempted distal digital replantation. The success of replantation, wound healing and functional results were evaluated according to Yamano. We performed 11 distal digital replantations in the study period. There were 6 total amputations, 4 subtotal amputations and 1 avulsion of the digital pulp. Revascularisation with long-term reattachment of the amputated tissues was possible in 8 cases (73%). In 3 cases (27%) secondary amputation closure was necessary. The mean operating time was 3 h 56 min. 6 patients, which had a successful replantation, were available for follow-up examinations after a mean period of 19 months. 5 patients were satisfied with the result and would again prefer replantation over primary amputation closure. 4 patients reported a good function of the replanted digits and did not complain about any limitations in their use. 2 patients complained about restricted function. All patients could return to their previous places of employment and were free of pain. Of the 12 affected digital nerves 11 nerves had a 2-point discrimination (2-PD) of ≤15 mm, 3 of them had a 2-PD between 7 and 10 mm and 4 of them of replanted digits and nail deformities in 2 patients. Distal digital replantation is complex and technically challenging. It leads to high patient satisfaction with only minimal functional

  19. FGF10 maintains distal lung bud epithelium and excessive signaling leads to progenitor state arrest, distalization, and goblet cell metaplasia

    Directory of Open Access Journals (Sweden)

    Kobberup Sune

    2008-01-01

    Full Text Available Abstract Background Interaction with the surrounding mesenchyme is necessary for development of endodermal organs, and Fibroblast growth factors have recently emerged as mesenchymal-expressed morphogens that direct endodermal morphogenesis. The fibroblast growth factor 10 (Fgf10 null mouse is characterized by the absence of lung bud development. Previous studies have shown that this requirement for Fgf10 is due in part to its role as a chemotactic factor during branching morphogenesis. In other endodermal organs Fgf10 also plays a role in regulating differentiation. Results Through gain-of-function analysis, we here find that FGF10 inhibits differentiation of the lung epithelium and promotes distalization of the embryonic lung. Ectopic expression of FGF10 in the lung epithelium caused impaired lung development and perinatal lethality in a transgenic mouse model. Lung lobes were enlarged due to increased interlobular distance and hyperplasia of the airway epithelium. Differentiation of bronchial and alveolar cell lineages was inhibited. The transgenic epithelium consisted predominantly of proliferating progenitor-like cells expressing Pro-surfactant protein C, TTF1, PEA3 and Clusterin similarly to immature distal tip cells. Strikingly, goblet cells developed within this arrested epithelium leading to goblet cell hyperplasia. Conclusion We conclude that FGF10 inhibits terminal differentiation in the embryonic lung and maintains the distal epithelium, and that excessive levels of FGF10 leads to metaplastic differentiation of goblet cells similar to that seen in chronic inflammatory diseases.

  20. Thermonuclear device

    International Nuclear Information System (INIS)

    Honda, Takuro; Maki, Koichi.

    1997-01-01

    The present invention provides a thermonuclear device, in which integrity of a measuring device is kept, the reactor wall temperature and wear of armour materials are monitored accurately even under intense radiation rays, so that the flow rate of coolants and plasma power can be controlled by using the signals. Infrared rays generated from the surface of the armour materials disposed on a first wall are detected to measure the reactor wall temperature. Coolant flow rate and plasma power are controlled based on the obtained reactor wall temperature. In addition, infrared rays generated from the back of the armour materials are detected to obtain the surface temperature in order to avoid intense radiation rays from plasmas. The coolant flow rate and the plasma power are controlled based on the obtained temperature on the surface of the reactor thereby controlling the temperature of the first wall and the armour material to 300degC or lower in a case of the first wall made of stainless steel and 1000degC or lower in a case of the armour material made of graphite. (I.S.)