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Sample records for surgical probing instrument

  1. Manual of Surgical Instruments

    Directory of Open Access Journals (Sweden)

    Olga Lidia Sánchez Sarría

    2014-10-01

    Full Text Available Surgical instruments are the group of tools used in surgical procedures. They are very expensive and sophisticated. Consequently, a standardized and meticulous care is essential; they should go through the decontamination, cleaning and sterilization process. These instruments are designed in order to provide surgeons with tools that help them to perform a basic surgical procedure; there are multiple variations and the design depends on their function. This paper aims at showing all surgical instruments that can be used in an operating room during surgery and are not generally included in the medical literature.

  2. Endotoxins in surgical instruments of hip arthroplasty

    Directory of Open Access Journals (Sweden)

    Vania Regina Goveia

    2016-06-01

    Full Text Available Abstract OBJECTIVE To investigate endotoxins in sterilized surgical instruments used in hip arthroplasties. METHOD A descriptive exploratory study conducted in a public teaching hospital. Six types of surgical instruments were selected, namely: acetabulum rasp, femoral rasp, femoral head remover, chisel box, flexible bone reamer and femoral head test. The selection was based on the analysis of the difficulty in removing bone and blood residues during cleaning. The sample was made up of 60 surgical instruments, which were tested for endotoxins in three different stages. The EndosafeTM Gel-Clot LAL (Limulus Amebocyte Lysate method was used. RESULT There was consistent gel formation with positive analysis in eight instruments, corresponding to 13.3%, being four femoral rasps and four bone reamers. CONCLUSION Endotoxins in quantity ≥0.125 UE/mL were detected in 13.3% of the instruments tested.

  3. Dermatologic Surgical Instruments: A History and Review.

    Science.gov (United States)

    Gandhi, Sumul A; Kampp, Jeremy T

    2017-01-01

    Dermatologic surgery requires precision and accuracy given the delicate nature of procedures performed. The use of the most appropriate instrument for each action helps optimize both functionality and cosmetic outcome. To review the history of surgical instruments used in dermatology, with a focus on mechanism and evolution to the instruments that are used in current practice. A comprehensive literature search was conducted via textbook and journal research for historic references while review of current references was conducted online using multiple search engines and PubMed. There are a number of articles that review instruments in dermatology, but this article adds a unique perspective in classifying their evolution, while also presenting them as levers that serve to increase human dexterity during the course of surgery. Surgical instruments allow fine manipulation of tissue, which in turn produces optimal outcomes. Surgical tools have been around since the dawn of man, and their evolution parallels the extent to which human civilization has specialized over time. This article describes the evolution of instruments from the general surgical armamentaria to the specialized tools that are used today.

  4. 21 CFR 888.4540 - Orthopedic manual surgical instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Orthopedic manual surgical instrument. 888.4540... (CONTINUED) MEDICAL DEVICES ORTHOPEDIC DEVICES Surgical Devices § 888.4540 Orthopedic manual surgical instrument. (a) Identification. An orthopedic manual surgical instrument is a nonpowered hand-held...

  5. 21 CFR 886.4350 - Manual ophthalmic surgical instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Manual ophthalmic surgical instrument. 886.4350... (CONTINUED) MEDICAL DEVICES OPHTHALMIC DEVICES Surgical Devices § 886.4350 Manual ophthalmic surgical instrument. (a) Identification. A manual ophthalmic surgical instrument is a nonpowered, handheld...

  6. SURGICAL TREATMENT OF SPONDYLOLISTHESIS WITH SOCON INSTRUMENTATION

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Objective. To observe the clinical outcomes of using a new instrumentation SOCON system in the treatment of degenerative spondylolisthesis.Methods. Retrospective clinical and roentgenograph review of 21 patients who suffered from degenerative spondylolisthesis with spinal stenosis treated by decompression, posterolateral intertransverse arthrodesis, and with transpedicle instrumentation of SOCON system.Results. Nineteen of 21 patients were completely recovery from their preoperative symptoms, 17 of 18 cases with grade one slippage reduced to normal spine alignment, 2 cases of grade two slippage fully reduced, and one case of grade two spondylolisthesis got 70% reduction. Post- operative satisfactory rate was 90.5%. Pain relief was 90.5%. Neither infection nor neurologic complication occurred in this series.Conclusion. Our short time follow-up and limited cases showed satisfactory preliminary result of surgical treatment of spondylolisthesis with SOCON instrumentation.

  7. Electrical Bioimpedance-Controlled Surgical Instrumentation.

    Science.gov (United States)

    Brendle, Christian; Rein, Benjamin; Niesche, Annegret; Korff, Alexander; Radermacher, Klaus; Misgeld, Berno; Leonhardt, Steffen

    2015-10-01

    A bioimpedance-controlled concept for bone cement milling during revision total hip replacement is presented. Normally, the surgeon manually removes bone cement using a hammer and chisel. However, this procedure is relatively rough and unintended harm may occur to tissue at any time. The proposed bioimpedance-controlled surgical instrumentation improves this process because, for example, most risks associated with bone cement removal are avoided. The electrical bioimpedance measurements enable online process-control by using the milling head as both a cutting tool and measurement electrode at the same time. Furthermore, a novel integrated surgical milling tool is introduced, which allows acquisition of electrical bioimpedance data for online control; these data are used as a process variable. Process identification is based on finite element method simulation and on experimental studies with a rapid control prototyping system. The control loop design includes the identified process model, the characterization of noise as being normally distributed and the filtering, which is necessary for sufficient accuracy ( ±0.5 mm). Also, in a comparative study, noise suppression is investigated in silico with a moving average filter and a Kalman filter. Finally, performance analysis shows that the bioimpedance-controlled surgical instrumentation may also performs effectively at a higher feed rate (e.g., 5 mm/s).

  8. SURGICAL TREATMENT OF SPONDYLOLISTHESIS WITH SOCON INSTRUMENTATION

    Institute of Scientific and Technical Information of China (English)

    金今; 沈建雄; 邱贵兴; 赵宏; 翁习生; 王以朋

    2000-01-01

    Objective. To observe the clinical outcomes of using a new imtnunentafion SOCON system in the treatment of degenerative spondylolisthesis. Methods. Retrospective clinical and roentgenograph review of 21 patients who suffered from degenerative spondylolisthesis with spinal stenosis treated by decompression, posterolateral intertransverse arthrodesis, and with transpedicle instrumentation of SOCON system. Results. Nineteen of 21 patients were completely recovery from their preoperative symptoms, 17 of 18 cases with grade one slippage reduced to normal spine alignment, 2 cases of grade two slippage fully reduced, and one case of grade two spondylolisthesis got 70% reduction. Post-operative satisfactory rate was 90.5%. Pain relief was 90.5%.Neither infection nor neurologic complication occurred in this series. Conclusion. Our short time follow-up and limited cases showed satisfactory preliminary result of surgical treatment of spondylolisthesis with SOCON instrumentation.

  9. Endotoxins in surgical instruments of hip arthroplasty.

    Science.gov (United States)

    Goveia, Vania Regina; Mendoza, Isabel Yovana Quispe; Guimarães, Gilberto Lima; Ercole, Flavia Falci; Couto, Bráulio Roberto Gonçalves Marinho; Leite, Edna Marilea Meireles; Stoianoff, Maria Aparecida Resende; Ferreira, José Antonio Guimarães

    2016-01-01

    To investigate endotoxins in sterilized surgical instruments used in hip arthroplasties. A descriptive exploratory study conducted in a public teaching hospital. Six types of surgical instruments were selected, namely: acetabulum rasp, femoral rasp, femoral head remover, chisel box, flexible bone reamer and femoral head test. The selection was based on the analysis of the difficulty in removing bone and blood residues during cleaning. The sample was made up of 60 surgical instruments, which were tested for endotoxins in three different stages. The EndosafeTM Gel-Clot LAL (Limulus Amebocyte Lysate method) was used. There was consistent gel formation with positive analysis in eight instruments, corresponding to 13.3%, being four femoral rasps and four bone reamers. Endotoxins in quantity ≥0.125 UE/mL were detected in 13.3% of the instruments tested. Investigar endotoxinas em instrumentais cirúrgicos esterilizados empregados em artroplastias do quadril. Estudo exploratório, descritivo, desenvolvido em um hospital público de ensino. Foram selecionados seis tipos de instrumentais, a saber: raspa acetabular, raspa femural, saca-cabeça de fêmur, formão box, fresa de fêmur e cabeça de prova de fêmur. A seleção foi feita a partir da análise da dificuldade para a remoção de resíduos de sangue e osso durante a limpeza. A amostra foi constituída por 60 instrumentais cirúrgicos, que foram testados para endotoxinas em três momentos distintos. Foi utilizado o método de gel-clot pelo Limulus Amebócito Lisado (LAL) Endosafe(tm). Houve formação de gel consistente com análise positiva em oito instrumentais, o que corresponde a 13,3%, sendo quatro raspas de fêmur e quatro fresas de fêmur. Foram detectadas endotoxinas em quantidade ≥0,125 UE/mL em 13,3% dos instrumentais testados.

  10. Surgical instrument similarity metrics and tray analysis for multi-sensor instrument identification

    Science.gov (United States)

    Glaser, Bernhard; Schellenberg, Tobias; Franke, Stefan; Dänzer, Stefan; Neumuth, Thomas

    2015-03-01

    A robust identification of the instrument currently used by the surgeon is crucial for the automatic modeling and analysis of surgical procedures. Various approaches for intra-operative surgical instrument identification have been presented, mostly based on radio-frequency identification (RFID) or endoscopic video analysis. A novel approach is to identify the instruments on the instrument table of the scrub nurse with a combination of video and weight information. In a previous article, we successfully followed this approach and applied it to multiple instances of an ear, nose and throat (ENT) procedure and the surgical tray used therein. In this article, we present a metric for the suitability of the instruments of a surgical tray for identification by video and weight analysis and apply it to twelve trays of four different surgical domains (abdominal surgery, neurosurgery, orthopedics and urology). The used trays were digitized at the central sterile services department of the hospital. The results illustrate that surgical trays differ in their suitability for the approach. In general, additional weight information can significantly contribute to the successful identification of surgical instruments. Additionally, for ten different surgical instruments, ten exemplars of each instrument were tested for their weight differences. The samples indicate high weight variability in instruments with identical brand and model number. The results present a new metric for approaches aiming towards intra-operative surgical instrument detection and imply consequences for algorithms exploiting video and weight information for identification purposes.

  11. Paul of Aegina's surgical instruments: a complete surgical instrumentarium in the seventh century AD.

    Science.gov (United States)

    Papadakis, Marios; de Bree, Eelco; Trompoukis, Constantinos; Manios, Andreas

    2015-03-02

    Although current progress in surgical instruments is oriented towards stapler devices, minimally invasive instrumentation and advanced cautery tools, it definitely seems intriguing to determine what instruments were used in antiquity and to appraise their use. Most adequate information can be retrieved from manuscripts of early medical authors, of whom Paul of Aegina (AD 625-690), also being a most important surgeon, is the most recent. The aim of this study is to present surgical instruments used in his practice. Surgical instruments mentioned in the original Greek text of his monumental work named Epitome of Medicine were sought using computer software. Further, similar research was performed on other significant manuscripts of earlier Greek medical writers to determine whether some of the instruments were exclusively mentioned by Paul of Aegina. In total, 121 different surgical instruments were identified and described in detail in the Epitome of Medicine. Thirty-three instruments (27%) were exclusively reported by Paul of Aegina. In antiquity a large number of surgical instruments were already being used. Paul of Aegina described in detail a large variety of fine, as well as a substantial number of, original surgical instruments, which he himself used in a wide spectrum of surgical operations. © 2015 Royal Australasian College of Surgeons.

  12. Toward fluorescence detection of protein residues on surgical instruments

    Science.gov (United States)

    Richardson, Patricia R.; Jones, Anita C.; Baxter, Robert L.; Baxter, Helen C.; Whittaker, A. Gavin; Campbell, Gaynor A.

    2004-06-01

    Prion proteins are the infectious agents that cause Creutzfeldt-Jakob Disease (CJD) in humans. These proteins are particularly resistant to normal sterilization procedures, and the theoretical risk of prion transmission via surgical instruments is of current public and professional concern. We are currently investigating fluorescence methods for the detection of proteins on surfaces, with a view to developing an optical-fiber-based system for routine, online monitoring of residual protein contamination on surgical instruments, in hospital sterilization departments. This paper presents preliminary results on the detection of femtomole amounts of fluorescently labelled protein on surgical steel and discusses some of the problems involved in the detection of fluorescence from metal samples.

  13. Sensorization of a surgical robotic instrument for force sensing

    Science.gov (United States)

    Shahzada, Kaspar S.; Yurkewich, Aaron; Xu, Ran; Patel, Rajni V.

    2016-03-01

    This paper presents the development and application of an approach for sensorizing a surgical robotic instrument for two degree-of-freedom (DOF) lateral force sensing. The sensorized instrument is compatible with the da Vinci® Surgical System and can be used for skills assessment and force control in specific surgical tasks. The sensing technology utilizes a novel layout of four fiber Bragg grating (FBG) sensors attached to the shaft of a da Vinci® surgical instrument. The two cross-section layout is insensitive to error caused by combined force and torque loads, and the orientation of the sensors minimizes the condition number of the instrument's compliance matrix. To evaluate the instrument's sensing capabilities, its performance was tested using a commercially available force-torque sensor, and showed a resolution of 0.05N at 1 kHz sampling rate. The performance of the sensorized instrument was evaluated by performing three surgical tasks on phantom tissue using the da Vinci® system with the da Vinci Research Kit (dVRK): tissue palpation, knot tightening during suturing and Hem-O-Lok® tightening during knotless suturing. The tasks were designed to demonstrate the robustness of the sensorized force measurement approach. The paper reports the results of further evaluation by a group of expert and novice surgeons performing the three tasks mentioned above.

  14. 3D Printed Surgical Instruments: The Design and Fabrication Process.

    Science.gov (United States)

    George, Mitchell; Aroom, Kevin R; Hawes, Harvey G; Gill, Brijesh S; Love, Joseph

    2017-01-01

    3D printing is an additive manufacturing process allowing the creation of solid objects directly from a digital file. We believe recent advances in additive manufacturing may be applicable to surgical instrument design. This study investigates the feasibility, design and fabrication process of usable 3D printed surgical instruments. The computer-aided design package SolidWorks (Dassault Systemes SolidWorks Corp., Waltham MA) was used to design a surgical set including hemostats, needle driver, scalpel handle, retractors and forceps. These designs were then printed on a selective laser sintering (SLS) Sinterstation HiQ (3D Systems, Rock Hill SC) using DuraForm EX plastic. The final printed products were evaluated by practicing general surgeons for ergonomic functionality and performance, this included simulated surgery and inguinal hernia repairs on human cadavers. Improvements were identified and addressed by adjusting design and build metrics. Repeated manufacturing processes and redesigns led to the creation of multiple functional and fully reproducible surgical sets utilizing the user feedback of surgeons. Iterative cycles including design, production and testing took an average of 3 days. Each surgical set was built using the SLS Sinterstation HiQ with an average build time of 6 h per set. Functional 3D printed surgical instruments are feasible. Advantages compared to traditional manufacturing methods include no increase in cost for increased complexity, accelerated design to production times and surgeon specific modifications.

  15. Automatic localization of the da Vinci surgical instrument tips in 3-D transrectal ultrasound.

    Science.gov (United States)

    Mohareri, Omid; Ramezani, Mahdi; Adebar, Troy K; Abolmaesumi, Purang; Salcudean, Septimiu E

    2013-09-01

    Robot-assisted laparoscopic radical prostatectomy (RALRP) using the da Vinci surgical system is the current state-of-the-art treatment option for clinically confined prostate cancer. Given the limited field of view of the surgical site in RALRP, several groups have proposed the integration of transrectal ultrasound (TRUS) imaging in the surgical workflow to assist with accurate resection of the prostate and the sparing of the neurovascular bundles (NVBs). We previously introduced a robotic TRUS manipulator and a method for automatically tracking da Vinci surgical instruments with the TRUS imaging plane, in order to facilitate the integration of intraoperative TRUS in RALRP. Rapid and automatic registration of the kinematic frames of the da Vinci surgical system and the robotic TRUS probe manipulator is a critical component of the instrument tracking system. In this paper, we propose a fully automatic registration technique based on automatic 3-D TRUS localization of robot instrument tips pressed against the air-tissue boundary anterior to the prostate. The detection approach uses a multiscale filtering technique to identify and localize surgical instrument tips in the TRUS volume, and could also be used to detect other surface fiducials in 3-D ultrasound. Experiments have been performed using a tissue phantom and two ex vivo tissue samples to show the feasibility of the proposed methods. Also, an initial in vivo evaluation of the system has been carried out on a live anaesthetized dog with a da Vinci Si surgical system and a target registration error (defined as the root mean square distance of corresponding points after registration) of 2.68 mm has been achieved. Results show this method's accuracy and consistency for automatic registration of TRUS images to the da Vinci surgical system.

  16. Design of teleoperated surgical instruments for minimally invasive surgery

    Science.gov (United States)

    Madhani, Akhil Jiten

    1998-12-01

    Minimally invasive surgery (MIS) is performed today using hand held instruments passed through small incisions into the body. The internal surgical site and instruments are viewed remotely on a monitor using images obtained with an endoscopic camera. It is well recognized that the marked therapeutic benefits of MIS must be weighed against the increased technical difficulty for the surgeon and the ensuing risk of surgical errors. Here I describe the design, construction, and operation of teleoperated surgical instruments that solve several key problems in current minimally invasive surgical practice. These improvements are primarily achieved through (1) an increase in dexterity and degrees of freedom, (2) force feedback to allow surgeons to feel instrument-tissue interactions, and (3) the elimination of geometrical discrepancies between actual and observed tool motions. I present the design of two teleoperator slave manipulators for minimally invasive surgery, the seven- degree-of-freedom Silver Falcon and the eight-degree-of- freedom Black Falcon. Both systems were tested using an existing PHANToM TM haptic interface which was modified for use as a master manipulator. Position based bilateral force-reflecting teleoperation was implemented using sound cable design principles, without force sensors. Through the design of system dynamics that accommodate a macro-micro control scheme, a substantial reduction was achieved in slave endpoint inertia and friction reflected to the user. The Black Falcon was successfully used to drive surgical sutures along arbitrarily oriented paths, a task which is rarely feasible using today's instruments. This test demonstrates successful kinematic design and range of motion, although the quality of force reflection was not sufficient to be helpful when suturing soft tissue. Force reflection was found to be more useful during rigid contact tasks where force information is not already available to the operator via visual cues. (Copies

  17. 3D printing surgical instruments: Are we there yet?

    Science.gov (United States)

    Rankin, Timothy M.; Giovinco, Nicholas A.; Cucher, Daniel J.; Watts, George; Hurwitz, Bonnie; Armstrong, David G.

    2015-01-01

    Background The applications for rapid prototyping have expanded dramatically over the last 20 years. In recent years, additive manufacturing has been intensely investigated for surgical implants, tissue scaffolds, and organs. There is, however, scant literature to date that has investigated the viability of 3D printing of surgical instruments. Materials and Methods Using a fused deposition manufacturing (FDM) printer, an army/ navy surgical retractor was replicated from polylactic acid (PLA) filament. The retractor was sterilized using standard FDA approved glutaraldehyde protocols, tested for bacteria by PCR, and stressed until fracture in order to determine if the printed instrument could tolerate force beyond the demands of an operating room. Results Printing required roughly 90 minutes. The instrument tolerated 13.6 kg of tangential force before failure, both before and after exposure to the sterilant. Freshly extruded PLA from the printer was sterile and produced no PCR product. Each instrument weighed 16g and required only $0.46 of PLA. Conclusions Our estimates place the cost per unit of a 3D printed retractor to be roughly 1/10th the cost of a stainless steel instrument. The PLA Army/ Navy is strong enough for the demands of the operating room. Freshly extruded PLA in a clean environment, such as an OR, would produce a sterile, ready to use instrument. Due to the unprecedented accessibility of 3D printing technology world wide, and the cost efficiency of these instruments, there are far reaching implications for surgery in some underserved and less developed parts of the world. PMID:24721602

  18. 21 CFR 878.4800 - Manual surgical instrument for general use.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Manual surgical instrument for general use. 878... SERVICES (CONTINUED) MEDICAL DEVICES GENERAL AND PLASTIC SURGERY DEVICES Surgical Devices § 878.4800 Manual surgical instrument for general use. (a) Identification. A manual surgical instrument for general use is...

  19. From flint to stainless steel: observations on surgical instrument composition.

    Science.gov (United States)

    Kirkup, J.

    1993-01-01

    Man's failure to extract deeply embedded thorns and arrowheads, with bare hands and teeth, stimulated 'instrument substitutes' mimicking these appendages. Evidence from primitive communities suggest animal, plant and mineral items were employed, both before and after metal became the standard material of today's armamentarium. Changing surgical instrument composition has mirrored concurrent technology and manufacturing methods both of which are reviewed. Particular significance is accorded flint, bronze, crucible steel, thermal sterilisation, nickel-plate, stainless steel and disposable plastics. The paper is based on an exhibition From Flint to Stainless Steel on display at the College. Images Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 PMID:8215156

  20. Left-handed surgical instruments - a guide for cardiac surgeons.

    Science.gov (United States)

    Burdett, Clare; Theakston, Maureen; Dunning, Joel; Goodwin, Andrew; Kendall, Simon William Henry

    2016-08-19

    For ease of use and to aid precision, left-handed instruments are invaluable to the left-handed surgeon. Although they exist, they are not available in many surgical centres. As a result, most operating theatre staff (including many left-handers) have little knowledge of their value or even application. With specific reference to cardiac surgery, this article addresses the ways in which they differ, why they are needed and what is required - with tips on use.

  1. [Development of an automatic ultrasonic cleaning machine for surgical instruments].

    Science.gov (United States)

    Geng, Shu-qing; He, Wei; Tao, Ren-hai; Ma, Bao-Qiu; Lu, Hai-long; Li, Li-hua; Feng, Hui-zhi; Zheng, Jin-zhi

    2005-11-01

    The automatic cleaning machine we have developed, adopts a SCM system in automatic cleaning. The machine has five functions: ultrasonic cleaning, cold or hot water spraying, drying and greasing. The clinical applications show that the machine with a good effectiveness is suitable for the cleaning of many surgical instruments. It also raises working efficiency, cuts down on the cost of repair and maintenance and reduces the injury and infection to nurses caused by manual cleaning, satisfying the needs of clinical applications.

  2. Ergonomic T-Handle for Minimally Invasive Surgical Instruments.

    Science.gov (United States)

    Parekh, J; Shepherd, Det; Hukins, Dwl; Maffulli, N

    2016-05-01

    A T-handle has been designed to be used for minimally invasive implantation of a dynamic hip screw to repair fractures of the proximal femur. It is capable of being used in two actions: (i) push and hold (while using an angle guide) and (ii) application of torque when using the insertion wrench and lag screw tap. The T-handle can be held in a power or precision grip. It is suitable for either single (sterilised by γ-irradiation) or multiple (sterilised by autoclaving) use. The principles developed here are applicable to handles for a wide range of surgical instruments.

  3. Integrated high pressure microhydraulic actuation and control for surgical instruments.

    Science.gov (United States)

    Moers, A J M; De Volder, M F L; Reynaerts, D

    2012-08-01

    To reduce the surgical trauma to the patient, minimally invasive surgery is gaining considerable importance since the eighties. More recently, robot assisted minimally invasive surgery was introduced to enhance the surgeon's performance in these procedures. This resulted in an intensive research on the design, fabrication and control of surgical robots over the last decades. A new development in the field of surgical tool manipulators is presented in this article: a flexible manipulator with distributed degrees of freedom powered by microhydraulic actuators. The tool consists of successive flexible segments, each with two bending degrees of freedom. To actuate these compliant segments, dedicated fluidic actuators are incorporated, together with compact hydraulic valves which control the actuator motion. Especially the development of microvalves for this application was challenging, and are the main focus of this paper. The valves distribute the hydraulic power from one common high pressure supply to a series of artificial muscle actuators. Tests show that the angular stroke of the each segment of this medical instrument is 90°.

  4. 21 CFR 876.4730 - Manual gastroenterology-urology surgical instrument and accessories.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Manual gastroenterology-urology surgical... Devices § 876.4730 Manual gastroenterology-urology surgical instrument and accessories. (a) Identification. A manual gastroenterology-urology surgical instrument and accessories is a device designed to...

  5. Surgical guidance system using hand-held probe with accompanying positron coincidence detector

    Energy Technology Data Exchange (ETDEWEB)

    Majewski, Stanislaw; Weisenberger, Andrew G.

    2017-10-10

    A surgical guidance system offering different levels of imaging capability while maintaining the same hand-held convenient small size of light-weight intra-operative probes. The surgical guidance system includes a second detector, typically an imager, located behind the area of surgical interest to form a coincidence guidance system with the hand-held probe. This approach is focused on the detection of positron emitting biomarkers with gamma rays accompanying positron emissions from the radiolabeled nuclei.

  6. Utility of an intraoperabive gamma probe in the surgical management of secondary or tertiary hyperparathyroidism

    NARCIS (Netherlands)

    Jorna, Francisca H.; Jager, Pieter L.; Lemstra, Clara; Wiggers, Theo; Stegeman, Coen A.; Plukker, John T. M.

    2008-01-01

    BACKGROUND: In primary hyperparathyroidism the gamma probe is effective, but its role in secondary hyperparathyroidism is unclear. We investigated the utility of the probe in the surgical management of secondary and tertiary hyperparathyroidism. METHODS: The value of the probe in guiding resection o

  7. Femoral Test Bed for Impedance Controlled Surgical Instrumentation

    Directory of Open Access Journals (Sweden)

    Christian Brendle

    2012-01-01

    Full Text Available The risk for patients during the standard procedure of revision of cemented artificial hip joints is unsatisfactorily highdue to its high level of invasiveness and limited access to the operative field. To reduce this risk we are developing anImpedance Controlled Surgical Instrumentation (ICOS system, which aims to establish real-time control during a BoneCement (BC milling process. For this, the relationship between the thickness of the BC and its frequency-dependentelectrical impedance is used to estimate the residual BC thickness. The aim is to avoid unintended cutting of boneby detecting the passage of the BC/bone boundary layer by the milling head. In a second step, an estimation of theresidual BC thickness will be used to improve process control. As a first step towards demonstrating the feasibility ofour approach, presented here are experimental studies to characterize the BC permittivity and to describe the process indetail. The results show that the permittivity properties of BC are dominated by its polymethyl methacrylate (PMMAfraction. Thus, PMMA can be used as a substitute for future experiments. Furthermore, a Femoral Test Bed (FTB wasdesigned. Using this setup we show it is feasible to accurately distinguish between slightly different thicknesses of BC.

  8. 21 CFR 874.4420 - Ear, nose, and throat manual surgical instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Ear, nose, and throat manual surgical instrument. 874.4420 Section 874.4420 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN..., and throat manual surgical instrument. (a) Identification. An ear, nose, and throat manual...

  9. Non-surgical instrumentation associated with povidone-iodine in the treatment of interproximal furcation involvements

    Directory of Open Access Journals (Sweden)

    Érica del Peloso Ribeiro

    2010-12-01

    Full Text Available OBJECTIVE: The aim of this controlled clinical trial was to evaluate the effect of topically applied povidone-iodine (PVP-I used as an adjunct to non-surgical treatment of interproximal class II furcation involvements. MATERIAL AND METHODS: Thirty-two patients presenting at least one interproximal class II furcation involvement that bled on probing with probing pocket depth (PPD >5 mm were recruited. Patients were randomly chosen to receive either subgingival instrumentation with an ultrasonic device using PVP-I (10% as the cooling liquid (test group or identical treatment using distilled water as the cooling liquid (control group. The following clinical outcomes were evaluated: visible plaque index, bleeding on probing (BOP, position of the gingival margin, relative attachment level (RAL, PPD and relative horizontal attachment level (RHAL. BAPNA (N-benzoyl-L-arginine-p-nitroanilide testing was used to analyze trypsin-like activity in dental biofilm. All parameters were evaluated at baseline and 1, 3 and 6 months after non-surgical subgingival instrumentation. RESULTS: Six months after treatment, both groups had similar means of PPD reduction, RAL and RHAL gain (p>0.05. These variables were, respectively, 2.20±1.10 mm, 1.27±1.02 mm and 1.33±0.85 mm in the control group and 2.67±1.21 mm, 1.50±1.09 mm and 1.56±0.93 mm in the test group. No difference was observed between groups at none of the posttreatment periods, regarding the number of sites showing clinical attachment gain >2 mm. However, at 6 months posttreatment, the test group presented fewer sites with PPD >5 mm than the control group. Also at 6 months the test group had lower BAPNA values than control group. CONCLUSION: The use of PVP-I as an adjunct in the non-surgical treatment of interproximal class II furcation involvements provided limited additional clinical benefits.

  10. Instrumentation of the da Vinci Robotic Surgical System

    DEFF Research Database (Denmark)

    Hansen, Karl Damkjær; Jensen, Simon; Sloth, Christoffer

    2015-01-01

    This paper details the AAU surgical robot, its hardware and software setup. The aim of the paper is to explain how a surgical robot has been rebuild as an open source platform for research in surgical robotics. As a result, the robot has full actuation and sensing capabilities at high sampling ra....... We aim at exploiting the developed surgical robot for research in semi-autonomous control, and safety mechanisms in the context of robotic surgery.......This paper details the AAU surgical robot, its hardware and software setup. The aim of the paper is to explain how a surgical robot has been rebuild as an open source platform for research in surgical robotics. As a result, the robot has full actuation and sensing capabilities at high sampling rate...

  11. Instrumentation of the da Vinci Robotic Surgical System

    DEFF Research Database (Denmark)

    Hansen, Karl Damkjær; Jensen, Simon; Sloth, Christoffer

    2015-01-01

    This paper details the AAU surgical robot, its hardware and software setup. The aim of the paper is to explain how a surgical robot has been rebuild as an open source platform for research in surgical robotics. As a result, the robot has full actuation and sensing capabilities at high sampling ra....... We aim at exploiting the developed surgical robot for research in semi-autonomous control, and safety mechanisms in the context of robotic surgery.......This paper details the AAU surgical robot, its hardware and software setup. The aim of the paper is to explain how a surgical robot has been rebuild as an open source platform for research in surgical robotics. As a result, the robot has full actuation and sensing capabilities at high sampling rate...

  12. The Scanning Theremin Microscope: A Model Scanning Probe Instrument for Hands-On Activities

    Science.gov (United States)

    Quardokus, Rebecca C.; Wasio, Natalie A.; Kandel, S. Alex

    2014-01-01

    A model scanning probe microscope, designed using similar principles of operation to research instruments, is described. Proximity sensing is done using a capacitance probe, and a mechanical linkage is used to scan this probe across surfaces. The signal is transduced as an audio tone using a heterodyne detection circuit analogous to that used in…

  13. The Scanning Theremin Microscope: A Model Scanning Probe Instrument for Hands-On Activities

    Science.gov (United States)

    Quardokus, Rebecca C.; Wasio, Natalie A.; Kandel, S. Alex

    2014-01-01

    A model scanning probe microscope, designed using similar principles of operation to research instruments, is described. Proximity sensing is done using a capacitance probe, and a mechanical linkage is used to scan this probe across surfaces. The signal is transduced as an audio tone using a heterodyne detection circuit analogous to that used in…

  14. Research on seamless development of surgical instruments based on biological mechanisms using CAD and 3D printer.

    Science.gov (United States)

    Yamamoto, Ikuo; Ota, Ren; Zhu, Rui; Lawn, Murray; Ishimatsu, Takakazu; Nagayasu, Takeshi; Yamasaki, Naoya; Takagi, Katsunori; Koji, Takehiko

    2015-01-01

    In the area of manufacturing surgical instruments, the ability to rapidly design, prototype and test surgical instruments is critical. This paper provides a simple case study of the rapid development of two bio-mechanism based surgical instruments which are ergonomic, aesthetic and were successfully designed, prototyped and conceptually tested in a very short period of time.

  15. Medical Devices; General and Plastic Surgery Devices; Classification of the Magnetic Surgical Instrument System. Final order.

    Science.gov (United States)

    2016-09-21

    The Food and Drug Administration (FDA) is classifying the Magnetic Surgical Instrument System into class II (special controls). The special controls that will apply to the device are identified in this order and will be part of the codified language for the magnetic surgical instrument system's classification. The Agency is classifying the device into class II (special controls) in order to provide a reasonable assurance of safety and effectiveness of the device.

  16. Effect of Intraperitoneal Radiotelemetry Instrumentation on Voluntary Wheel Running and Surgical Recovery in Mice

    Science.gov (United States)

    2012-09-01

    small transmitter group; model G2 Emitter, Mini Mitter, Bend, OR). Surgical preparation con- sisted of shaving the abdominal fur and scrubbing the...Sl , No 5 September 2012 Pages 600-608 Effect of Intraperitoneal Radiotelemetry Instrumentation on Voluntary Wheel Running and Surgical Recovery...of the diaphragm, large intestine, and duodenum. These results demonstrate that the large transmitter delayed surgical recovery, disrupted normal

  17. A cyber-physical management system for delivering and monitoring surgical instruments in the OR.

    Science.gov (United States)

    Li, Yu-Ting; Jacob, Mithun; Akingba, George; Wachs, Juan P

    2013-08-01

    The standard practice in the operating room (OR) is having a surgical technician deliver surgical instruments to the surgeon quickly and inexpensively, as required. This human "in the loop" system may result in mistakes (eg, missing information, ambiguity of instructions, and delays). Errors can be reduced or eliminated by integrating information technology (IT) and cybernetics into the OR. Gesture and voice automatic acquisition, processing, and interpretation allow interaction with these new systems without disturbing the normal flow of surgery. This article describes the development of a cyber-physical management system (CPS), including a robotic scrub nurse, to support surgeons by passing surgical instruments during surgery as required and recording counts of surgical instruments into a personal health record (PHR). The robot used responds to hand signals and voice messages detected through sophisticated computer vision and data mining techniques. The CPS was tested during a mock surgery in the OR. The in situ experiment showed that the robot recognized hand gestures reliably (with an accuracy of 97%), it can retrieve instruments as close as 25 mm, and the total delivery time was less than 3 s on average. This online health tool allows the exchange of clinical and surgical information to electronic medical record-based and PHR-based applications among different hospitals, regardless of the style viewer. The CPS has the potential to be adopted in the OR to handle surgical instruments and track them in a safe and accurate manner, releasing the human scrub tech from these tasks.

  18. Two New Instruments To Probe Attitudes about Gender and Mathematics.

    Science.gov (United States)

    Leder, Gilah C.; Forgasz, Helen J.

    Two forms of a new instrument, "Mathematics as a Gendered Domain" and "Who and Mathematics," were developed to replace one of the scales of the Fennema-Sherman Mathematics Attitudes Scales. The aim of both instruments is to measure the extent to which students stereotype mathematics as a gendered domain. For "Mathematics…

  19. Identification of surgical instruments using UHF-RFID technology

    Directory of Open Access Journals (Sweden)

    Bourouah Mohamed

    2015-09-01

    Full Text Available The paper presents research, development and advantage of Radio Frequency IDentification (RFID technology based system for medical instrument management and safe usage. The system is developed for two scenarios. In the first scenario, a Ultra High Frequency (UHF is used and the UHF–interrogator system with UHF-antennas is constructed to work as conveyor-belt and instruments are placed between two antennas. Second scenario, suitable for the operating rooms, includes four antennas, placed under the table with instruments, system’s phase shifter, inserted between the antenna and reader in order to reduce the effect of dead spots, caused by the electromagnetic reflections. High reliable identification rate is achieved by synchronizing phase shifters with particular interrogator. The system is software calibrated and can be re-calibrated at run-time to achieve high efficiency of power transmission to the antenna and in order to enable the receiver to decode the tag signals. With currently on the market available RFID tags and previously mentioned technology approaches, detection rate of 87.5% can be achieved.

  20. The Spin-Plane Double Probe Electric Field Instrument for MMS

    Science.gov (United States)

    Lindqvist, P.-A.; Olsson, G.; Torbert, R. B.; King, B.; Granoff, M.; Rau, D.; Needell, G.; Turco, S.; Dors, I.; Beckman, P.; Macri, J.; Frost, C.; Salwen, J.; Eriksson, A.; Åhlén, L.; Khotyaintsev, Y. V.; Porter, J.; Lappalainen, K.; Ergun, R. E.; Wermeer, W.; Tucker, S.

    2016-03-01

    The Spin-plane double probe instrument (SDP) is part of the FIELDS instrument suite of the Magnetospheric Multiscale mission (MMS). Together with the Axial double probe instrument (ADP) and the Electron Drift Instrument (EDI), SDP will measure the 3-D electric field with an accuracy of 0.5 mV/m over the frequency range from DC to 100 kHz. SDP consists of 4 biased spherical probes extended on 60 m long wire booms 90∘ apart in the spin plane, giving a 120 m baseline for each of the two spin-plane electric field components. The mechanical and electrical design of SDP is described, together with results from ground tests and calibration of the instrument.

  1. Radius surgical system and conventional laparoscopic instruments in abdominal surgery: application, learning curve and ergonomy.

    Science.gov (United States)

    Di Lorenzo, N; Camperchioli, I; Gaspari, A L

    2007-12-01

    We illustrate our experience with a new class of instruments, the mechanical manipulators (MM), whose main features are an improved mobility, and ergonomy and a modular structure. A specific MM, the Radius Surgical System (RADIUS), has been used both for educational purposes as well as in clinical studies, demonstrating that it can represent an efficient tool to support surgeons performing surgical complex procedures, with a short learning curve for the postural attitude.

  2. 3D tracking of surgical instruments using a single camera for laparoscopic surgery simulation.

    Science.gov (United States)

    Shin, Sangkyun; Kim, Youngjun; Kwak, Hyunsoo; Lee, Deukhee; Park, Sehyung

    2011-01-01

    Most laparoscopic surgery simulation systems are expensive and complex. To overcome these problems, this study presents a novel three-dimensional tracking method for laparoscopic surgical instruments that uses only a single camera and fiducial markers. The proposed method does not require any mechanical parts to measure the three-dimensional positions/orientations of surgical instruments and the opening angle of graspers. We implemented simple and cost-effective hardware using the proposed method and successfully combined it with virtual simulation software for laparoscopic surgery.

  3. Efficacy of a washer-disinfector in eliminating healthcare-associated pathogens from surgical instruments.

    Science.gov (United States)

    Rutala, William A; Gergen, Maria F; Weber, David J

    2014-07-01

    This study was designed to test the efficacy of a washer-disinfector in eliminating selected healthcare-associated pathogens from surgical instruments. Our results showed that a washer-disinfector was extremely effective in eliminating microorganisms (>7-log(10) reduction), including vegetative and spore-forming bacteria, from experimentally contaminated instruments. The washer-disinfector remained effective in eliminating microorganisms in the absence of enzymatic cleaners and detergents.

  4. Real-time localization of articulated surgical instruments in retinal microsurgery.

    Science.gov (United States)

    Rieke, Nicola; Tan, David Joseph; Amat di San Filippo, Chiara; Tombari, Federico; Alsheakhali, Mohamed; Belagiannis, Vasileios; Eslami, Abouzar; Navab, Nassir

    2016-12-01

    Real-time visual tracking of a surgical instrument holds great potential for improving the outcome of retinal microsurgery by enabling new possibilities for computer-aided techniques such as augmented reality and automatic assessment of instrument manipulation. Due to high magnification and illumination variations, retinal microsurgery images usually entail a high level of noise and appearance changes. As a result, real-time tracking of the surgical instrument remains challenging in in-vivo sequences. To overcome these problems, we present a method that builds on random forests and addresses the task by modelling the instrument as an articulated object. A multi-template tracker reduces the region of interest to a rectangular area around the instrument tip by relating the movement of the instrument to the induced changes on the image intensities. Within this bounding box, a gradient-based pose estimation infers the location of the instrument parts from image features. In this way, the algorithm does not only provide the location of instrument, but also the positions of the tool tips in real-time. Various experiments on a novel dataset comprising 18 in-vivo retinal microsurgery sequences demonstrate the robustness and generalizability of our method. The comparison on two publicly available datasets indicates that the algorithm can outperform current state-of-the art. Copyright © 2016. Published by Elsevier B.V.

  5. The Holometer: An Instrument to Probe Planckian Quantum Geometry

    CERN Document Server

    Chou, Aaron; Gustafson, H Richard; Hogan, Craig; Kamai, Brittany L; Kwon, Ohkyung; Lanza, Robert; McCuller, Lee; Meyer, Stephan S; Richardson, Jonathan; Stoughton, Chris; Tomlin, Ray; Weiss, Rainer

    2016-01-01

    This paper describes the Fermilab Holometer, an instrument for measuring correlations of position variations over a four-dimensional volume of space-time. The apparatus consists of two co-located, but independent and isolated, 40m power-recycled Michelson interferometers, whose outputs are cross-correlated to 25 MHz. The data are sensitive to correlations of differential position across the apparatus over a broad band of frequencies up to and exceeding the inverse light crossing time, 7.6 MHz. A noise model constrained by diagnostic and environmental data distinguishes among physical origins of measured correlations, and is used to verify shot-noise-limited performance. These features allow searches for exotic quantum correlations that depart from classical trajectories at spacelike separations, with a strain noise power spectral density sensitivity smaller than the Planck time. The Holometer in current and future configurations is projected to provide precision tests of a wide class of models of quantum geom...

  6. Passive markers for tracking surgical instruments in real-time 3-D ultrasound imaging.

    Science.gov (United States)

    Stoll, Jeffrey; Ren, Hongliang; Dupont, Pierre E

    2012-03-01

    A family of passive echogenic markers is presented by which the position and orientation of a surgical instrument can be determined in a 3-D ultrasound volume, using simple image processing. Markers are attached near the distal end of the instrument so that they appear in the ultrasound volume along with the instrument tip. They are detected and measured within the ultrasound image, thus requiring no external tracking device. This approach facilitates imaging instruments and tissue simultaneously in ultrasound-guided interventions. Marker-based estimates of instrument pose can be used in augmented reality displays or for image-based servoing. Design principles for marker shapes are presented that ensure imaging system and measurement uniqueness constraints are met. An error analysis is included that can be used to guide marker design and which also establishes a lower bound on measurement uncertainty. Finally, examples of marker measurement and tracking algorithms are presented along with experimental validation of the concepts.

  7. Endoscopic vision-based tracking of multiple surgical instruments during robot-assisted surgery.

    Science.gov (United States)

    Ryu, Jiwon; Choi, Jaesoon; Kim, Hee Chan

    2013-01-01

    Robot-assisted minimally invasive surgery is effective for operations in limited space. Enhancing safety based on automatic tracking of surgical instrument position to prevent inadvertent harmful events such as tissue perforation or instrument collisions could be a meaningful augmentation to current robotic surgical systems. A vision-based instrument tracking scheme as a core algorithm to implement such functions was developed in this study. An automatic tracking scheme is proposed as a chain of computer vision techniques, including classification of metallic properties using k-means clustering and instrument movement tracking using similarity measures, Euclidean distance calculations, and a Kalman filter algorithm. The implemented system showed satisfactory performance in tests using actual robot-assisted surgery videos. Trajectory comparisons of automatically detected data and ground truth data obtained by manually locating the center of mass of each instrument were used to quantitatively validate the system. Instruments and collisions could be well tracked through the proposed methods. The developed collision warning system could provide valuable information to clinicians for safer procedures.

  8. 3D printing of surgical instruments for long-duration space missions.

    Science.gov (United States)

    Wong, Julielynn Y; Pfahnl, Andreas C

    2014-07-01

    The first off-Earth fused deposition modeling (FDM) 3D printer will explore thermoplastic manufacturing capabilities in microgravity. This study evaluated the feasibility of FDM 3D printing 10 acrylonitrile butadiene styrene (ABS) thermoplastic surgical instruments on Earth. Three-point bending tests compared stiffness and yield strength between FDM 3D printed and conventionally manufactured ABS thermoplastic. To evaluate the relative speed of using four printed instruments compared to conventional instruments, 13 surgeons completed simulated prepping, draping, incising, and suturing tasks. Each surgeon ranked the performance of six printed instruments using a 5-point Likert scale. At a thickness of 5.75 mm or more, the FDM printing process had a less than 10% detrimental effect on the tested yield strength and stiffness of horizontally printed ABS thermoplastic relative to conventional ABS thermoplastic. Significant weakness was observed when a bending load was applied transversely to a 3D printed layer. All timed tasks were successfully performed using a printed sponge stick, towel clamp, scalpel handle, and toothed forceps. There was no substantial difference in time to completion of simulated surgical tasks with control vs. 3D printed instruments. Of the surgeons, 100%, 92%, 85%, 77%, 77%, and 69% agreed that the printed smooth and tissue forceps, curved and straight hemostats, tissue and right angle clamps, respectively, would perform adequately. It is feasible to 3D print ABS thermoplastic surgical instruments on Earth. Loadbearing structures were designed to be thicker, when possible. Printing orientations were selected so that the printing layering direction of critical structures would not be transverse to bending loads.

  9. On using an array of fiber bragg grating sensors for closed-loop control of flexible minimally invasive surgical instruments

    NARCIS (Netherlands)

    Roesthuis, Roy; Janssen, Sander; Misra, Sarthak

    2013-01-01

    Flexible minimally invasive surgical instruments can be used to target difficult-to-reach locations within the human body. Accurately steering these instruments requires information about the three-dimensional shape of the instrument. In the current study, we use an array of Fiber Bragg Grating

  10. An integrated approach to endoscopic instrument tracking for augmented reality applications in surgical simulation training.

    Science.gov (United States)

    Loukas, Constantinos; Lahanas, Vasileios; Georgiou, Evangelos

    2013-12-01

    Despite the popular use of virtual and physical reality simulators in laparoscopic training, the educational potential of augmented reality (AR) has not received much attention. A major challenge is the robust tracking and three-dimensional (3D) pose estimation of the endoscopic instrument, which are essential for achieving interaction with the virtual world and for realistic rendering when the virtual scene is occluded by the instrument. In this paper we propose a method that addresses these issues, based solely on visual information obtained from the endoscopic camera. Two different tracking algorithms are combined for estimating the 3D pose of the surgical instrument with respect to the camera. The first tracker creates an adaptive model of a colour strip attached to the distal part of the tool (close to the tip). The second algorithm tracks the endoscopic shaft, using a combined Hough-Kalman approach. The 3D pose is estimated with perspective geometry, using appropriate measurements extracted by the two trackers. The method has been validated on several complex image sequences for its tracking efficiency, pose estimation accuracy and applicability in AR-based training. Using a standard endoscopic camera, the absolute average error of the tip position was 2.5 mm for working distances commonly found in laparoscopic training. The average error of the instrument's angle with respect to the camera plane was approximately 2°. The results are also supplemented by video segments of laparoscopic training tasks performed in a physical and an AR environment. The experiments yielded promising results regarding the potential of applying AR technologies for laparoscopic skills training, based on a computer vision framework. The issue of occlusion handling was adequately addressed. The estimated trajectory of the instruments may also be used for surgical gesture interpretation and assessment. Copyright © 2013 John Wiley & Sons, Ltd.

  11. Quality of life after surgical decompression of lumbar spinal stenosis with and without instrumentation.

    Science.gov (United States)

    Grivas, Theodoros B; Vasiliadis, Elias; Papadakis, Stamatios A; Mouzakis, Vasilios; Segos, Dimitrios

    2006-01-01

    The aim is to evaluate the influence on quality of life of surgical decompression with and without instrumentation in lumbar spinal stenosis. Twenty three patients, (16 women, 7 men) with a mean age of 62,8 years old (range 44-80) who underwent a surgical decompression for lumbar spinal stenosis filled the SF-36 questionnaire pre- and postoperatively, during the follow up period which was at a mean value of 42 months (range 6 to 50 months). Spinal stenosis was degenerative in 18 patients and as a consequence of spondylolisthisis in 5. In 15 patients decompression and fusion using instrumentation (group I) was performed and in 8 patients only decompression was performed (group II). Statistical analysis was carried out using the Wilcoxon Signed Rank Test. In group I, the domains that evidenced statistical significant improvement were bodily pain (p<0,041), general health (p<0,042), vitality (p<0,042), social functioning (p<0,043), and mental health (p<0,042). Not any specific domain in group II showed a statistical significant improvement postoperatively. Comparing the two groups overall SF-36 score, a statistical significant improvement was noted for group I (p<0,001) and for group II (p<0,017). The statistical significance of improvement was stronger in patients of group I than group II. Surgical decompression for lumbar spinal stenosis reduces pain and restores significantly physical and mental health. Decompression and instrumentation presents superior results in patients' quality of life when compared to patients that single decompression was performed.

  12. 21 CFR 878.4810 - Laser surgical instrument for use in general and plastic surgery and in dermatology.

    Science.gov (United States)

    2010-04-01

    ... plastic surgery and in dermatology. 878.4810 Section 878.4810 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GENERAL AND PLASTIC SURGERY DEVICES Surgical Devices § 878.4810 Laser surgical instrument for use in general and plastic surgery and...

  13. Surgeons and their tools: a history of surgical instruments and their innovators. Part V: pass me the hemostat/clamp.

    Science.gov (United States)

    El-Sedfy, Abraham; Chamberlain, Ronald S

    2015-03-01

    This is the last of five manuscripts reviewing the historical origins of some of the more commonly used surgical instruments and takes "time out" to remind current surgeons about the surgical pioneers on whose shoulders they now stand and whose inventions they now use.

  14. Surgeons and their tools: a history of surgical instruments and their innovators. Part IV: pass me the forceps.

    Science.gov (United States)

    El-Sedfy, Abraham; Chamberlain, Ronald S

    2015-02-01

    This is the fourth of five manuscripts reviewing the historical origins of some of the more commonly used surgical instruments and takes "time out" to remind current surgeons about the surgical pioneers on whose shoulders they now stand and whose inventions they now use.

  15. Freeman's transorbital lobotomy as an anomaly: A material culture examination of surgical instruments and operative spaces.

    Science.gov (United States)

    Collins, Brianne M; Stam, Henderikus J

    2015-05-01

    In 1946, Walter Freeman introduced the transorbital ice pick lobotomy. Touted as a procedure that could be learned and subsequently performed by psychiatrists outside of the operating room, the technique was quickly criticized by neurosurgeons. In this article, we take a material culture approach to consider 2 grounds upon which neurosurgeons based their objections-surgical instruments and operative spaces. On both counts, Freeman was in contravention of established normative neurosurgical practices and, ultimately, his technique was exposed as an anomaly by neurosurgeons. Despite its rejection, the transorbital lobotomy became entrenched in contemporary memory and remains the emblematic procedure of the psychosurgery era. (c) 2015 APA, all rights reserved).

  16. Testing the Solar Probe Cup, an Instrument Designed to Touch the Sun

    Science.gov (United States)

    Whittlesey, Phyllis L.; Case, Anthony W.; Kasper, Justin Christophe; Wright, Kenneth H., Jr.; Alterman, Ben; Cirtain, Jonathan W.; Bookbinder, Jay; Korreck, Kelly E.; Stevens, Michael Louis

    2014-01-01

    Solar Probe Plus will be the first, fastest, and closest mission to the sun, providing the first direct sampling of the sub-Alfvenic corona. The Solar Probe Cup (SPC) is a unique re-imagining of the traditional Faraday Cup design and materials for immersion in this high temperature environment. Sending an instrument of this type into a never-seen particle environment requires extensive characterization prior to launch to establish sufficient measurement accuracy and instrument response. To reach this end, a slew of tests for allowing SPC to see ranges of appropriate ions and electrons, as well as a facility that reproduces solar photon spectra and fluxes for this mission. Having already tested the SPC at flight like temperatures with no significant modification of the noise floor, we recently completed a round of particle testing to see if the deviations in Faraday Cup design fundamentally change the operation of the instrument. Results and implications from these tests will be presented, as well as performance comparisons to cousin instruments such as those on the WIND spacecraft.

  17. Highly sensitive rapid fluorescence detection of protein residues on surgical instruments

    Energy Technology Data Exchange (ETDEWEB)

    Kovalev, Valeri I [School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); Bartona, James S [School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); Richardson, Patricia R [School of Chemistry, University of Edinburgh, Edinburgh, EH9 3JJ (United Kingdom); Jones, Anita C [School of Chemistry, University of Edinburgh, Edinburgh, EH9 3JJ (United Kingdom)

    2006-07-15

    There is a risk of contamination of surgical instruments by infectious protein residues, in particular, prions which are the agents for Creutzfeldt-Jakob Disease in humans. They are exceptionally resistant to conventional sterilization, therefore it is important to detect their presence as contaminants so that alternative cleaning procedures can be applied. We describe the development of an optimized detection system for fluorescently labelled protein, suitable for in-hospital use. We show that under optimum conditions the technique can detect {approx}10 attomole/cm{sup 2} with a scan speed of {approx}3-10 cm{sup 2}/s of the test instrument's surface. A theoretical analysis and experimental measurements will be discussed.

  18. A shape memory alloy-actuated surgical instrument with compact volume.

    Science.gov (United States)

    Shi, Zhen Yun; Liu, Da; Wang, Tian Miao

    2014-12-01

    Surgical robotic systems have been proven to be accurate and dexterous during minimally invasive surgery (MIS). However, single incision laparoscopic surgery (SILS) requires more compact robotic arms with sufficient dexterity and output. A shape memory alloy (SMA)-actuated instrument was adopted to assist operations. The instrument fixed at the slave site had three degrees of freedom (DOFs) and was driven by SMA wires, pitch, yaw, and grip, with an 8 mm diameter; a passive hydraulic support mechanism was placed in vitro. In vitro, the maximum force, velocity and accuracy were proven to be sufficient for medical application. In an animal study, the system was inserted into the abdomen; three more generic constraints were tested: medical gesture, safety, and implementation. The robot was feasible and safe for multi-angle monitoring, grasping, and holding an organ. The SMA-actuated system was accurate and dexterous with minimal system volume. Copyright © 2013 John Wiley & Sons, Ltd.

  19. Minimally invasive cardiac surgery in the adult: surgical instruments, equipment, and techniques.

    Science.gov (United States)

    Kitamura, M; Uwabe, K; Hirota, J; Kawai, A; Endo, M; Koyanagi, H

    1998-09-01

    To clarify the special instruments and equipment used for minimally invasive cardiac surgery (MICS), we examined the initial experiences with MICS operations with ministernotomy or minithoracotomy at our institution. Fifty adult patients with congenital, valvular, and/or ischemic heart diseases underwent MICS operations, and all surgical procedures were completed without conversion to full sternotomy. The length of the skin incision was about 10 cm or less in all patients. Postoperative recovery was favorable, and the majority of the patients were discharged from the hospital around the end of the second postoperative week. In this series of patients, an oscillating bone saw, lifting type retractor, 2 blade spreader, cannula with a balloon, and right-angled aortic clamp among other items, were very useful for successfully performing various operations with MICS approaches and techniques. The associated results suggest that MICS with ministernotomy or minithoracotomy was feasible using special instruments and equipment and could be encouraged for adult patients with various cardiovascular diseases.

  20. Instrument for near infrared emission spectroscopic probing of human fingertips in vivo

    Science.gov (United States)

    Chaiken, J.; Deng, Bin; Bussjager, Rebecca J.; Shaheen, George; Rice, David; Stehlik, Dave; Fayos, John

    2010-03-01

    We present instrumentation for probing of volar side fingertip capillary beds with free space coupled near infrared light while collecting Raman, Rayleigh, and Mie scattered light as well as fluorescence. Fingertip skin capillary beds are highly vascularized relative to other tissues and present a desirable target for noninvasive probing of blood. But human hands and fingers in particular are also highly idiosyncratic body parts requiring specific apparatus to allow careful and methodical spectoscopic probing. The apparatus includes means for precise and reproducible placement of the tissues relative to the optical aperture. Appropriate means are provided for applying and maintaining pressure to keep surface tissues immobile during experiments while obtaining the desired blood content and flow. Soft matter, e.g., skin, extrudes into the aperture in response to any applied pressure, e.g., to keep the tissue in registration with the optical system, so the position, contact area, pressure, and force are continuously measured and recorded to produce feedback for an actuator applying force and to discern the compliance of the test subject. The compliance strongly affects the reliability of the measurement and human factors must be adequately managed in the case of in vivo probing. The apparatus produces reproducible observations and measurements that allow consistent probing of the tissues of a wide range of skin types.

  1. Surgical risks and perioperative complications of instrumented lumbar surgery in patients with liver cirrhosis

    Directory of Open Access Journals (Sweden)

    Tung-Yi Lin

    2014-02-01

    Full Text Available Background: Patients with liver cirrhosis have high surgical risks due to malnutrition, impaired immunity, coagulopathy, and encephalopathy. However, there is no information in English literature about the results of liver cirrhotic patients who underwent instrumented lumbar surgery. The purpose of this study is to report the perioperative complications, clinical outcomes and determine the surgical risk factors in cirrhotic patients. Methods: We retrospectively reviewed 29 patients with liver cirrhosis who underwent instrumented lumbar surgery between 1997 and 2009. The hepatic functional reserves of the patients were recorded according to the Child-Turcotte-Pugh scoring system. Besides, fourteen other variables and perioperative complications were also collected. To determine the risks, we divided the patients into two groups according to whether or not perioperative complications developed. Results: Of the 29 patients, 22 (76% belonged to Child class A and 7 (24% belonged to Child class B. Twelve patients developed one or more complications. Patients with Child class B carried a significantly higher incidence of complications than those with Child class A (p = 0.011. In the Child class A group, patients with 6 points had a significantly higher incidence of complications than those with 5 points (p = 0.025. A low level of albumin was significantly associated with higher risk, and a similar trend was also noted for the presence of ascites although statistical difference was not reached. Conclusion: The study concludes that patients with liver cirrhosis who have undergone instrumented lumbar surgery carry a high risk of developing perioperative complications, especially in those with a Child-Turcotte-Pugh score of 6 or more.

  2. Supportive periodontal therapy of furcation sites: non-surgical instrumentation with or without topical doxycycline.

    Science.gov (United States)

    Dannewitz, Bettina; Lippert, Katherine; Lang, Niklaus P; Tonetti, Maurizio S; Eickholz, Peter

    2009-06-01

    Evaluation of the clinical effect of topical subgingival application of doxycycline gel adjunctively to scaling and root planing (SRP) at furcation sites during supportive periodontal therapy (SPT). In 39 SPT patients exhibiting at least four pockets > or m with bleeding on probing, SRP was rendered in all pockets > or m. Additionally, 14% doxycycline gel was applied subgingivally in 20 patients after random assignment (SRP&DOXY). Clinical parameters were assessed at baseline, 3, 6, and 12 months after therapy. Additional benefit of topical doxycycline was evaluated as a short-term (3 months) improvement of furcation involvement and influence on the frequency of re-instrumentation up to 12 months. A total of 323 furcation sites (class 0: 160; class I: 101; class II: 18; and class III: 44) were treated (SRP: 165, SRP&DOXY: 158). SRP&DOXY resulted in better improvement of furcation involvement than SRP alone 3 months after treatment (p=0.041). However, SRP&DOXY failed to show a significant difference between both groups in the number of re-instrumentations. Single subgingival application of doxycycline in addition to SRP had a short-term effect on furcation involvement. However, it failed to reduce the frequency of re-instrumentation up to 12 months at furcation sites.

  3. Surgical Outcome of Reduction and Instrumented Fusion in Lumbar Degenerative Spondylolisthesis

    Directory of Open Access Journals (Sweden)

    Farzad Omidi-Kashani

    2016-02-01

    Full Text Available Background: Lumbar degenerative spondylolisthesis (LDS is a degenerative slippage of the lumbar vertebrae. We aimed to evaluate the surgical outcome of degenerative spondylolisthesis with neural decompression, pedicular screw fixation, reduction, and posterolateral fusion. Methods: This before-after study was carried out on 45 patients (37 female and 8 male with LDS operated from August 2008 to January 2011. The patients’ pain and disability were assessed by visual analogue scale (VAS and Oswestry disability index (ODI questionnaire. In surgery, we applied distraction force to facilitate slip reduction. All the intra- and postoperative complications were recorded. The paired t-test and Pearson correlation coefficient were used for statistical analysis. Results: The mean age of patients and mean follow-up period were 58.3±3.5 years and 31.2±4.8 months, respectively. The mean slip correction rate was 52.2% with a mean correction loss of 4.8%. Preoperative VAS and ODI improved from 8.8 and 71.6 to postoperative 2.1 and 28.7, respectively. Clinical improvement was more prominent in more reduced patients, but Pearson coefficient could not find a significant correlation. Conclusion: Although spinal decompression with fusion and posterior instrumentation in surgical treatment of the patients with LDS result in satisfactory outcome, vertebral reduction cannot significantly enhance the clinical improvement.

  4. Science Instrument Support Electronics Systems for the Relativity Mission Satellite, Gravity Probe B

    Science.gov (United States)

    Bencze, W. J.; Brumley, R. W.; Buchman, S.; Clarke, B.; Hipkins, D. N.; Farley, R.; Shestople, P.; Meriwether, D.; Gray, C.

    The Relativity Mission, Gravity Probe B (GP-B), uses four redundant high precision electrostatically suspended mechanical gyroscopes for measuring the relativistic precessions of the frame of reference in a 640 km polar orbit. The two precessions to be measured are predicted in General Relativity are the geodetic effect, 6.6 arcsec/year, and the frame dragging effect, 0.042 arcsec/year. The Science Instrument Support Electronics or Payload Electronics Package enables this measurement to be performed by providing the necessary control and monitoring functions for the Science Instrument Assembly that contains the four gyroscopes and reference star tracking telescope. This paper describes the overall architecture of the Payload Electronics system and the design and operation of its component parts: 1) the SQUID Readout electronics (SRE) for gyroscope orientation measurement, 2) The Gyroscope Suspension System (GSS) for gyroscope electrostatic suspension and spin axis alignment, 3) the Telescope Readout Electronics (TRE) for measurement of the reference star location, 4) the Experiment Control Unit (ECU) for heater, valve, and rotor electrostatic charge control and thermometry, 5) the custom GPS receiver for orbital position determination and time reference generation, and 6) the Gas Management Assembly (GMA) that controls and routes the gaseous helium used for initial gyroscope spin-up. Contingent upon a successful launch of Gravity Probe on April 17 2004, preliminary performance results will be presented along side the predicated performance estimates derived from system analysis and test on the ground prior to launch.

  5. Scanning probe microscopy: instrumentation and applications on thin films and magnetic multilayers.

    Science.gov (United States)

    Karoutsos, Vagelis

    2009-12-01

    In this article we present a review on instrumentation and the modes of operation of a scanning probe microscope. In detail, we review the main techniques of Scanning Probe Microscopy (SPM), which are Scanning Tunneling Microscopy (STM) and Atomic Force Microscopy (AFM), focusing our attention on the latter one. The AFM instrument provides information on the roughness and grain size of thin films. As an example we review recent results on two metallic thin film systems: thin Ag films deposited on glass, and Ni/Pt compositionally modulated multilayers deposited on glass, Si, and polyimide substrates. To show the validity of the grain size measurements, we compare the data with the ones resulting from X-ray diffraction (XRD) measurements. We show that the AFM results are reliable for grain diameters as small as 14 nm, which is approximately comparable to the tip radius. Finally, we deal with Magnetic Force Microscopy (MFM) results on Co/Pt and Co/Au multilayers. We observe perpendicularly magnetized domains. The domain configurations are correlated to the magnetization hysteresis curves.

  6. Sterile and economic instrumentation in laparoscopic surgery. Experiences with 6,000 surgical laparoscopies, 1990-1996.

    Science.gov (United States)

    Fengler, T W; Pahlke, H; Kraas, E

    1998-10-01

    Because so many common surgical problems can now be addressed by the laparoscopic approach, the issue of sterile processing has to be reconsidered. Selected laparoscopic instrumentation was analyzed regarding wear and tear and decontamination after sterile processing following 6,000 surgical laparoscopies carried out between 1990 and 1996 at the Academic Hospital Moabit, Berlin. Fewer than 7.9 (parts of) instruments failed per 100 laparoscopies. Most of the repairs involved scissors. The main problems were blunting, burnt or disconnected electromechanical components, defective insulation, and damaged or lost parts of dismantable instruments. Residues of human blood proteins were detected on a few instruments. The effect of intraluminal rinsing was documented by measuring the iron content (as an indicator for blood contamination). A comparison of costs showed that it was >10 times cheaper to use instrumentation with reusable components. The sterile processing of economic reusable instrumentation for laparoscopies needs staff well trained in sterile supply. Instrument design should allow easy dismantling and rinsing of internal parts. Insulating compounds present a problem for decontamination. Disinfection with aldehydes before cleaning the lumina of instruments must be avoided because protein coagulation will occur. A tube-in-tube concept for tubular instruments offering compatibility should be favored.

  7. A novel set of surgical instruments facilitate the procedure of laparoscopic pyeloplasty

    Institute of Scientific and Technical Information of China (English)

    CHEN Wen-zheng; GUO Fei; LI Yun; Riccardo Autorino; LI Jin-yi; WANG Hui-qing; Fatih Altunrende; SUN Ying-hao

    2012-01-01

    Background Open pyeloplasty has been historically described as the gold standard for the surgical treatment of ureteropelvic junction obstruction (UPJO),even if new techniques have recently gained a prominent role in this field.Laparoscopic pyeloplasty (LP) is not widely prevelant because of the technically challenging nature and it represents the gold standard for UPJO only in expert hands.To overcome some difficulties and technical challenges encountered during pure laparoscopic pyeloplasty,we designed a set of new instruments and assessed them using porcine model.Methods According to the ideas from the surgeons,our medical engineer designed three new instruments,including the right angle laparoscopy scissors,the petal-shape ureter dilator and the guide tube.Four experienced laparoscopic experts were involved in a no survival porcine study to assess the help of these new instruments.Four experiments were conducted on live pigs that weighed 22 to 25 kg at the same time.After general anesthesia was administered,transperitoneal ureteroureterostomy was performed using standard laparoscopic instruments,including placing the double J stent anterograde.Then,the opposite lateral was done by the same surgeon plus these new devices for side-by-side comparative analysis.All experts were interviewed to assess these new instruments by the questionnaire based on the visual analog scale (VAS) from 1 (none) to 10 (very much).Results The procedures were all technically successful.The right angle laparoscopy scissors and the guide tube were accepted by all participants and the Help Score were 6.75 and 4.25 respectively,at the same time the New Difficulty Score 1.25 and 1.75.However,the petal-shape ureter dilator got 1.5 Help Score and 6.5 New Difficulty Score.These surgeons made a negative comment and one of surgeons recommended the stone basket was more suitable.Conclusion The right angle laparoscopy scissors and the guide tube may be helpful to minimize some difficulties in pure

  8. Elimination of transmissible spongiform encephalopathy infectivity and decontamination of surgical instruments by using radio-frequency gas-plasma treatment.

    Science.gov (United States)

    Baxter, H C; Campbell, G A; Whittaker, A G; Jones, A C; Aitken, A; Simpson, A H; Casey, M; Bountiff, L; Gibbard, L; Baxter, R L

    2005-08-01

    It has now been established that transmissible spongiform encephalopathy (TSE) infectivity, which is highly resistant to conventional methods of deactivation, can be transmitted iatrogenically by contaminated stainless steel. It is important that new methods are evaluated for effective removal of protein residues from surgical instruments. Here, radio-frequency (RF) gas-plasma treatment was investigated as a method of removing both the protein debris and TSE infectivity. Stainless-steel spheres contaminated with the 263K strain of scrapie and a variety of used surgical instruments, which had been cleaned by a hospital sterile-services department, were examined both before and after treatment by RF gas plasma, using scanning electron microscopy and energy-dispersive X-ray spectroscopic analysis. Transmission of scrapie from the contaminated spheres was examined in hamsters by the peripheral route of infection. RF gas-plasma treatment effectively removed residual organic residues on reprocessed surgical instruments and gross contamination both from orthopaedic blades and from the experimentally contaminated spheres. In vivo testing showed that RF gas-plasma treatment of scrapie-infected spheres eliminated transmission of infectivity. The infectivity of the TSE agent adsorbed on metal spheres could be removed effectively by gas-plasma cleaning with argon/oxygen mixtures. This treatment can effectively remove 'stubborn' residual contamination on surgical instruments.

  9. The Contributions of Gamma Probe to Lesion Detectability and Surgical Safety in Recurrent Thyroid Cancer at Risk

    Directory of Open Access Journals (Sweden)

    Salih Sinan Gültekin

    2013-08-01

    Full Text Available In patients, who underwent thyroid surgery or treated with I-131 radioiodine previously for differentiated thyroid cancer, a second surgical intervention carries higher risks due to distortion of the natural anatomy and development of fibrotic/cicatricial tissue. In addition, accurate assessment of current status about extent of the disease is important in terms of success of the surgery. In this case report, we present the positive contribution of intraoperative gamma probe used for lesion detectability and for surgical safety in a patient operated for several times and administered high cumulative dose of radioiodine therapy for diffentiated thyroid carcinoma previously.

  10. Contributors to Surgical In-patient Satisfaction—Development and Reliability of a Targeted Instrument

    Directory of Open Access Journals (Sweden)

    CSK Cheung

    2009-07-01

    Conclusions: The initial version of HK2Happ was reliable in assessing surgical patient satisfaction. The measure is now undergoing validity testing across different surgical patient populations for generalisation and generation of a short form of discriminant items.

  11. Project Icarus: Preliminary Thoughts on the Selection of Probes and Instruments for an Icarus-style Interstellar Mission

    Science.gov (United States)

    Crawford, Ian A.

    2016-06-01

    In this paper we outline the range of probes and scientific instruments that will be required in order for Icarus to fulfill its scientific mission of exploring a nearby star, its attendant planetary system, and the intervening interstellar medium. Based on this preliminary analysis, we estimate that the minimum total Icarus scientific payload mass (i.e. the mass of probes and instruments which must be decelerated to rest in the target system to enable a meaningful programme of scientific investigation) will be in the region of 100 tonnes. Of this, approximately 10 tonnes would be allocated for cruise-phase science instruments, and about 35 tonnes (i.e. the average of estimated lower and upper limits of 28 and 41 tonnes) would be contributed by the intra-system science payload itself (i.e. the dry mass of the stellar and planetary probes and their instruments). The remaining ~55 tonnes is allocated for the sub-probe intra-system propulsion requirements (crudely estimated from current Solar System missions; detailed modelling of sub-probe propulsion systems will be needed to refine this figure). The overall mass contributed by the science payload to the total that must be decelerated from the interstellar cruise velocity will be considerably more than 100 tonnes, however, as allowance must be made for the payload structural and infrastructural elements required to support, deploy, and communicate with the science probes and instruments. Based on the earlier Daedalus study, we estimate another factor of two to allow for these components. Pending the outcome of more detailed studies, it therefore appears that an overall science-related payload mass of ~200 tonnes will be required. This paper is a submission of the Project Icarus Study Group.

  12. Intraoperative optical coherence tomography using an optimized reflective optical relay, real-time heads-up display, and semitransparent surgical instrumentation

    Science.gov (United States)

    Tao, Yuankai K.; El-Haddad, Mohamed T.; Srivastava, Sunil K.; Feiler, Daniel; Noonan, Amanda I.; Rollins, Andrew M.; Ehlers, Justis P.

    2015-03-01

    Ophthalmic surgical maneuvers are currently limited by the ability of surgeons to visualize and manipulate semitransparent tissue layers as thin as tens of microns. We describe several iterative advances in iOCT technology, including a novel iOCT system, real-time heads-up display (HUD) feedback, visualization of intraoperative maneuvers, and OCT-compatible surgical instrumentation. Simulated surgical maneuvers were performed on freshly enucleated porcine eyes. Subretinal space cannulation with injection was performed and imaged using spatial compounding. The optical properties of semitransparent materials were quantified to identify OCT-compatible substrates, and surgical instrument prototypes were machined, including corneal, surgical picks, and retinal forceps.

  13. Is there a role for the use of aviation assessment instruments in surgical training preparation? A feasibility study.

    Science.gov (United States)

    Stolk-Vos, Aline C; Heres, Marion H; Kesteloo, Jasper; Verburg, Dick; Hiddema, Frans; Lie, Desiree A; de Korne, Dirk F

    2017-01-01

    Selection for surgical residency programmes could potentially be improved through pretraining preparation, after assessment of surgical candidates' sensorimotor skills and personality traits. Existing aviation pilot selection instruments are available to test sensorimotor skills and personality traits. This study examined selected instruments to assess medical trainees' sensorimotor skills and personality traits. Aviation's validated computer-based Computerized Pilot Aptitude and Screening System (COMPASS) and Checklist Professional Profile (CPP) were applied to 166 final year medical students during a surgical clerkship between 2013 and 2015. All trainees completed COMPASS and CPP within the prescribed 2 hours. Compared with an age-matched and gender-matched cohort of 165 pilot candidates, medical trainees scored significantly higher on eye-hand coordination (peye-hand-foot coordination (pdominance (p<0.001), ambition (p<0.001) and resilience (p<0.001). Final year medical trainees from one medical school were able to complete aviation's sensorimotor skills and personality traits selection instruments within the set time frame. They scored differently from aviation trainees on selected skills and personality traits. The applicability and utility of aviation instruments to presurgical training preparation remains to be tested. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.

  14. A Thermal Melt Probe System for Extensive, Low-Cost Instrument Deployment Within and Beneath Ice Sheets

    Science.gov (United States)

    Winebrenner, D. P.; Elam, W. T.; Carpenter, M.; Kintner, P., III

    2014-12-01

    More numerous observations within and beneath ice sheets are needed to address a broad variety of important questions concerning ice sheets and climate. However, emplacement of instruments continues to be constrained by logistical burdens, especially in cold ice a kilometer or more thick. Electrically powered thermal melt probes are inherently logistically light and efficient, especially for reaching greater depths in colder ice. They therefore offer a means of addressing current measurement problems, but have been limited historically by a lack of technology for reliable operation at the necessary voltages and powers. Here we report field tests in Greenland of two new melt probes. We operated one probe at 2.2 kilowatts (kW) and 1050 volts (V), achieving a depth of 400 m in the ice in ~ 120 hours, without electrical failure. That depth is the second greatest achieved thus far with a thermal melt probe, exceeded only by one deployment to 1005 m in Greenland in 1968, which ended in an electrical failure. Our test run took place in two intervals separated by a year, with the probe frozen at 65 m depth during the interim, after which we re-established communication, unfroze the probe, and proceeded to the greater depth. During the second field test we operated a higher-power probe, initially at 2.5 kW and 1500 V and progressing to 4.5 kW and 2000 V. Initial data indicate that this probe achieved a descent rate of 8 m/hr, which if correct would be the fastest rate yet achieved for such probes. Moreover, we observed maintenance of vertical probe travel using pendulum steering throughout both tests, as well as autonomous descent without operator-intervention after launch. The latter suggests potential for crews of 1-2 to operate several melt probes concurrently. However, the higher power probe did suffer electrical failure of a heating element after 7 hours of operation at 2000 V (24 hours after the start of the test), contrary to expectations based on laboratory

  15. Study of Individual Characteristic Abdominal Wall Thickness Based on Magnetic Anchored Surgical Instruments

    Institute of Scientific and Technical Information of China (English)

    Ding-Hui Dong; Wen-Yan Liu; Hai-Bo Feng; Yi-Li Fu; Shi Huang; Jun-Xi Xiang; Yi Lyu

    2015-01-01

    Background:Magnetic anchored surgical instruments (MASI),relying on magnetic force,can break through the limitations of the single port approach in dexterity.Individual characteristic abdominal wall thickness (ICAWT) deeply influences magnetic force that determines the safety of MASI.The purpose of this study was to research the abdominal wall characteristics in MASI applied environment to find ICAWT,and then construct an artful method to predict ICAWT,resulting in better safety and feasibility for MASI.Methods:For MASI,ICAWT is referred to the thickness of thickest point in the applied environment.We determined ICAWT through finding the thickest point in computed tomography scans.We also investigated the traits of abdominal wall thickness to discover the factor that can be used to predict ICAWT.Results:Abdominal wall at C point in the middle third lumbar vertebra plane (L3) is the thickest during chosen points.Fat layer thickness plays a more important role in abdominal wall thickness than muscle layer thickness."BMI-ICAWT" curve was obtained based on abdominal wall thickness of C point in L3 plane,and the expression was as follow:f(x) =P1 × x2 + P2 x x + P3,where P1 =0.03916 (0.01776,0.06056),P2 =1.098 (0.03197,2.164),P3 =-18.52 (-31.64,-5.412),R-square:0.99.Conclusions:Abdominal wall thickness of C point at L3 could be regarded as ICAWT.BMI could be a reliable predictor of ICAWT.In the light of "BMI-ICAWT" curve,we may conveniently predict ICAWT by BMI,resulting a better safety and feasibility for MASI.

  16. Study of Individual Characteristic Abdominal Wall Thickness Based on Magnetic Anchored Surgical Instruments

    Directory of Open Access Journals (Sweden)

    Ding-Hui Dong

    2015-01-01

    Full Text Available Background: Magnetic anchored surgical instruments (MASI, relying on magnetic force, can break through the limitations of the single port approach in dexterity. Individual characteristic abdominal wall thickness (ICAWT deeply influences magnetic force that determines the safety of MASI. The purpose of this study was to research the abdominal wall characteristics in MASI applied environment to find ICAWT, and then construct an artful method to predict ICAWT, resulting in better safety and feasibility for MASI. Methods: For MASI, ICAWT is referred to the thickness of thickest point in the applied environment. We determined ICAWT through finding the thickest point in computed tomography scans. We also investigated the traits of abdominal wall thickness to discover the factor that can be used to predict ICAWT. Results: Abdominal wall at C point in the middle third lumbar vertebra plane (L3 is the thickest during chosen points. Fat layer thickness plays a more important role in abdominal wall thickness than muscle layer thickness. "BMI-ICAWT" curve was obtained based on abdominal wall thickness of C point in L3 plane, and the expression was as follow: f(x = P1 × x 2 + P2 × x + P3, where P1 = 0.03916 (0.01776, 0.06056, P2 = 1.098 (0.03197, 2.164, P3 = −18.52 (−31.64, −5.412, R-square: 0.99. Conclusions: Abdominal wall thickness of C point at L3 could be regarded as ICAWT. BMI could be a reliable predictor of ICAWT. In the light of "BMI-ICAWT" curve, we may conveniently predict ICAWT by BMI, resulting a better safety and feasibility for MASI.

  17. Project Icarus: Preliminary Thoughts on the Selection of Probes and Instruments for an Icarus-style Interstellar Mission

    CERN Document Server

    Crawford, Ian A

    2016-01-01

    In this paper we outline the range of probes and scientific instruments that will be required in order for Icarus to fulfill its scientific mission of exploring a nearby star, its attendant planetary system, and the intervening interstellar medium. Based on this preliminary analysis, we estimate that the minimum total Icarus scientific payload mass (i.e. the mass of probes and instruments which must be decelerated to rest in the target system to enable a meaningful programme of scientific investigation) will be in the region of 100 tonnes. Of this, approximately 10 tonnes would be allocated for cruise-phase science instruments, and about 35 tonnes (i.e. the average of estimated lower and upper limits of 28 and 41 tonnes) would be contributed by the intra-system science payload itself (i.e. the dry mass of the stellar and planetary probes and their instruments). The remaining ~55 tonnes is allocated for the sub-probe intra-system propulsion requirements (crudely estimated from current Solar System missions; de...

  18. RESULTS OF SURGICAL TREATMENT OF INFANTILE AND JUVENILE SCOLIOSIS USING VARIOUS INSTRUMENTATION

    Directory of Open Access Journals (Sweden)

    M. V. Mikhailovsky

    2015-01-01

    Full Text Available Introduction. The analysis Results of surgical treatment of growing children with infantile and juvenile scoliosis (IS can the optimal method of treatment select. In young children with significant growth potential spinal fusion may not be the best option as it limits further longitudinal growth of the spine and may to the thoracic insufficiency syndrome result. To address this problem recently several techniques focused, their have advantages and drawbacks.Material and methods. Since 2008 year 127 patients (64 girls, 63 boys aged (4.5 ± 2.1 years were operated on. In group I 65 patients were operated on using VEPTR (Vertical Expandable Prosthetic Titanium Rib instrumentation, in group II 42 patients using various spinal instrumentation. 20 patients with congenital kyphosis were excluded. The average follow-up time was (5.6 ± 1.1 years.Results. In group I average value of the primary scoliotic curve before surgery was (74.7 ± 22.9, secondary curve (42.8 ± 16.0, thoracic kyphosis (46.3 ± 27.4, lumbar lordosis (54.6 ± 14. Average value of the primary scoliotic curve after surgery was reduced to (51 ± 20 (correction 31.7%, at followup to (56.5 ± 18.5, secondary curve (31.8 ± 12.8 (25.7%, at follow-up to (32.4 ± 18.4, thoracic kyphosis (36.8 ± 20.8 (20,5%, at follow-up to (41.8 ± 21.0, lumbar lordosis (45.4 ± 12.7 (16,9%, at follow-up to (48.2 ± 11.7 (p < 0.05. Space available for lung before surgery was (84.5 ± 8.7 %, after surgery was (94.8 ± 6.7%, at follow-up increased to (98.6 ± 5.4 % (p < 0.05. Complications included 11 implant dislocations and 1 infection. In group II average value of the primary scoliotic curve before surgery was (87.6 ± 6.6, secondary curve (47.8 ± 4.6, thoracic kyphosis (61.4 ± 10.4, lumbar lordosis (61.8 ± 4.9. Average value of the primary scoliotic curve after surgery was reduced to 50.6 ± 5.3 (correction 42.3%, at follow-up to (66.1 ± 6.3

  19. Science and the Large Hadron Collider: a probe into instrumentation, periodization and classification

    CERN Document Server

    Roy, Arpita

    2012-01-01

    On September 19, 2008, the Large Hadron Collider (LHC) at CERN, Switzerland, began the world’s highest energy experiments as a probe into the structure of matter and forces of nature. Just nine days after the gala start-up, an explosion occurred in the LHC tunnel that brought the epic collider to a complete standstill. In light of the catastrophic incident that disrupted the operation of the LHC, the paper investigates the relation of temporality to the cycle of work in science, and raises the question: What kind of methodological value should we ascribe to events such as crises or breakdowns? Drawing upon and integrating classical anthropological themes with two and a half years of fieldwork at the LHC particle accelerator complex, the paper explores how the incident in September, which affected the instrument, acquaints us with the distribution of work in the laboratory. The incident discloses that the organization of science is not a homogenous ensemble, but marked by an enormous diversity of tasks and p...

  20. Development of a novel sweeping Langmuir probe instrument for monitoring the upper ionosphere on board a pico-satellite

    Science.gov (United States)

    Ranvier, Sylvain; De Keyser, Johan; Cardoen, Pepijn; Pieroux, Didier

    2014-05-01

    A novel Langmuir probe instrument, which will fly on board the Pico-Satellite for Atmospheric and Space Science Observations (PICASSO), is under development at the Belgian Institute for Space Aeronomy. PICASSO was initiated to join the QB50 project as scientific in-orbit demonstrator. The sweeping Langmuir probe (SLP) instrument is designed to measure both plasma density and electron temperature at an altitude varying from about 400 km up to 700 km from a high inclination orbit. Therefore, the plasma density is expected to fluctuate over a wide range, from about 1e6/m³ at high latitude and high altitude up to 1e12/m³ at low/mid latitude and low altitude. The electron temperature is expected to lie between approximately 1000 K and 3000 K. Given the high inclination of the orbit, the SLP instrument will allow a global monitoring of the ionosphere with a maximum spatial resolution of the order of 150 m. The main goals are to study 1) the ionosphere-plasmasphere coupling, 2) the subauroral ionosphere and corresponding magnetospheric features, 3) auroral structures, 4) polar caps, and 5) ionospheric dynamics via coordinated observations with EISCAT's heating radar. To achieve the scientific objectives described above, the instrument includes four thin cylindrical probes whose electrical potential is swept in such a way that both plasma density and electron temperature can be derived. In addition, since at least two probes will be out of the spacecraft's wake at any given time, differential measurements can be performed to increase the accuracy. Along the orbit, the Debye length is expected to vary from a few millimetres up to a few meters. Due to the tight constraints in terms of mass and volume inherent to pico-satellites, the use of long booms, which would guarantee that the probes are outside the sheath of the spacecraft (several Debye lengths away), is not possible. Consequently, the probes might be in the sheath of the spacecraft in polar regions. Extensive

  1. A Novel Combination Point-of-View (POV) Action Camera Recording to Capture the Surgical Field and Instrument Ergonomics in Oculoplastic Surgery.

    Science.gov (United States)

    Warrian, Kevin J; Ashenhurst, Michael; Gooi, Adrian; Gooi, Patrick

    2015-01-01

    To evaluate a novel combination head-mounted/chest-mounted point-of-view recording system for oculoplastic surgical procedures. The point-of-view head camera captures the surgical field, while the point-of-view chest camera captures a wide field of view to record instrument ergonomics. Various methods of recording were trialed. The head camera with a narrow field of view was better for recording fine details of the surgical field. The chest camera recording a wide field of view was optimal for recording hand positions. Stereoscopic recording of the instrument ergonomics was helpful in relaying the relative positions of the surgeon's hands and instruments. Point-of-view cameras are cost-effective means of recording oculoplastics procedures. The authors feel simultaneously recording the surgeon's ergonomics and the corresponding instrument movements within the surgical field, from the "surgeon's view", will augment surgical education.

  2. Use of Synthetic Single-Stranded Oligonucleotides as Artificial Test Soiling for Validation of Surgical Instrument Cleaning Processes

    Directory of Open Access Journals (Sweden)

    Nadja Wilhelm

    2014-01-01

    Full Text Available Surgical instruments are often strongly contaminated with patients’ blood and tissues, possibly containing pathogens. The reuse of contaminated instruments without adequate cleaning and sterilization can cause postoperative inflammation and the transmission of infectious diseases from one patient to another. Thus, based on the stringent sterility requirements, the development of highly efficient, validated cleaning processes is necessary. Here, we use for the first time synthetic single-stranded DNA (ssDNA_ODN, which does not appear in nature, as a test soiling to evaluate the cleaning efficiency of routine washing processes. Stainless steel test objects were coated with a certain amount of ssDNA_ODN. After cleaning, the amount of residual ssDNA_ODN on the test objects was determined using quantitative real-time PCR. The established method is highly specific and sensitive, with a detection limit of 20 fg, and enables the determination of the cleaning efficiency of medical cleaning processes under different conditions to obtain optimal settings for the effective cleaning and sterilization of instruments. The use of this highly sensitive method for the validation of cleaning processes can prevent, to a significant extent, the insufficient cleaning of surgical instruments and thus the transmission of pathogens to patients.

  3. Development and Validation of a Near-Infrared Optical System for Tracking Surgical Instruments.

    Science.gov (United States)

    Lin, Qinyong; Cai, Ken; Yang, Rongqian; Chen, Huazhou; Wang, Zhigang; Zhou, Jing

    2016-04-01

    Surgical navigation systems can help doctors maximize the accuracy of surgeries, minimize operation durations, avoid mistakes, and improve the survival chances of patients. The tracking of device is an important component in surgical navigation systems. However, commercial surgical tracking devices are expensive, thus hindering the development of surgical navigation systems, particularly in developing countries. Therefore, an accurate and low-cost near-infrared optical tracking system is presented in this study for the real-time tracking of surgical tools and for measuring and displaying the positions of these tools relative to lesions and other targets inside a patient's body. A relative algorithm for the registration of surgical tools is also proposed in this paper to yield easy, safe, and precise tracking. Experiments are conducted to test the performance of the system. Results show that the mean square errors of the distances between the light-emitting points on the surgical tools are less than 0.3 mm, with the mean square error of distance between the tip and light-emitting points is less than 0.025 mm and that between two adjacent corner points is 0.2714 mm.

  4. Initial measurements of O-ion and He-ion decay rates observed from the Van Allen probes RBSPICE instrument

    OpenAIRE

    Gerrard, Andrew; Lanzerotti, Louis; Gkioulidou, Matina; Mitchell, Donald; Manweiler, Jerry; Bortnik, Jacob; Keika, Kunihiro

    2014-01-01

    H-ion (∼45 keV to ∼600 keV), He-ion (∼65 keV to ∼520 keV), and O-ion (∼140 keV to ∼1130 keV) integral flux measurements, from the Radiation Belt Storm Probe Ion Composition Experiment (RBSPICE) instrument aboard the Van Allan Probes spacecraft B, are reported. These abundance data form a cohesive picture of ring current ions during the first 9 months of measurements. Furthermore, the data presented herein are used to show injection characteristics via the He-ion/H-ion abundance ratio and the ...

  5. Surgical instrument biocontaminant fluorescence detection in ambient lighting conditions for hospital reprocessing and sterilization department (Conference Presentation)

    Science.gov (United States)

    Baribeau, François; Bubel, Annie; Dumont, Guillaume; Vachon, Carl; Lépine, André; Rochefort, Stéphane; Massicotte, Martin; Buteau-Vaillancourt, Louis; Gallant, Pascal; Mermut, Ozzy

    2017-03-01

    Hospitals currently rely on simple human visual inspection for assessing cleanliness of surgical instruments. Studies showed that surgical site infections are in part attributed to inadequate cleaning of medical devices. Standards groups recognize the need to objectively quantify the amount of residues on surgical instruments and establish guidelines. We developed a portable technology for the detection of contaminants on surgical instruments through fluorescence following cleaning. Weak fluorescence signals are usually detected in the obscurity only with the lighting of the excitation source. The key element of this system is that it works in ambient lighting conditions, a requirement to not disturb the normal workflow of hospital reprocessing facilities. A biocompatible fluorescent dye is added to the detergent and labels the proteins of organic residues. It is resistant to the harsh environment in a washer-disinfector. Two inspection devices have been developed with a 488nm laser as the excitation source: a handheld scanner and a tabletop station using spectral-domain and time-domain ambient light cancellation schemes. The systems are eye safe and equipped with image processing and interfacing software to provide visual or audible warnings to the operator based on a set of adjustable signal thresholds. Micron-scale residues are detected by the system which can also evaluate soil size and mass. Unlike swabbing, it can inspect whole tools in real-time. The technology has been validated in an independent hospital decontamination research laboratory. It also has potential applications in the forensics, agro-food, and space fields. Technical aspects and results will be presented and discussed.

  6. Portable Chemical Sterilizer for Microbial Decontamination of Surgical Instruments, Fruits and Vegetables, and Field Feeding Equipment

    National Research Council Canada - National Science Library

    Doona, C. J; Feeherry, F. E; Kustin, K; Curtin, M. A; Baer, D. G

    2006-01-01

    The Portable Chemical Sterilizer (PCS) is a revolutionary biomedical sterilization technology that provides the capability for portable, power-free, point-of-use sterilization to meet the Army's Far-Forward Surgical Teams (FSTs...

  7. Instrumentation

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    Journal Scope:Instrumentation is a high quality open access peer reviewed research journal.Authors are solicited to contribute to these journals by submitting articles that illustrate most up-to-date research results,projects,surveying works and industrial experiences that describe significant advances in the instrumental science.The mission of the Instrumentation is

  8. Comparison by objective parameters in patients with chronic rhinosinusitis managed medically and surgically (with and without powered instruments)

    Science.gov (United States)

    Behera, Samarendra; Patro, Sourabha K.; Gupta, Ashok K.

    2016-01-01

    Objective: To compare mucociliary clearance time and quality of life in patients who underwent sinus surgery using conventional and powered instruments, and in patients who were treated nonsurgically. Methods: A total of 151 patients with chronic rhinosinusitis were included. Fifty-four patients were treated conservatively, 48 patients were managed surgically by using conventional instruments and 49 patients were managed by using a microdebrider. Kupferberg nasal endoscopy grades, 20-item Sino-Nasal Outcome Test scores, Lund-Mackay scores, and mucociliary clearance time were analyzed. Results: On comparison among the groups, it was found that there was a significant difference between group A (nonsurgically treated) compared with group B (surgery by conventional means) or group C (surgery with microdebrider) in nasal endoscopic grades, Lund-Mackay scores, 20-item Sino-Nasal Outcome Test scores, and mucociliary clearance time. However, in comparison between groups B and C, there was no statistically significant difference. Conclusion: Mucociliary clearance time tended to recover after starting treatment for chronic rhinosinusitis both after conservative treatment and after surgical treatment. Surgery provided better improvement in different objective scores in chronic rhinosinusitis. There exists no statistical difference in parameters independent of the instrument used for surgery. PMID:28107141

  9. Surgeons and their tools: a history of surgical instruments and their innovators--Part II: The surgeon's wand-evolution from knife to scalpel to electrocautery.

    Science.gov (United States)

    El-Sedfy, Abraham; Chamberlain, Ronald S

    2014-12-01

    This is the second of five articles reviewing the historical origins of some of the more commonly used surgical instruments and takes "time out" to remind current surgeons about the surgical pioneers on whose shoulders they now stand and whose inventions they now use.

  10. Surgeons and their tools: a history of surgical instruments and their innovators. Part III: the medical student's best friend—retractors.

    Science.gov (United States)

    El-Sedfy, Abraham; Chamberlain, Ronald S

    2015-01-01

    This is the third of five manuscripts reviewing the historical origins of some of the more commonly used surgical instruments and takes "time out" to remind current surgeons about the surgical pioneers on whose shoulders they now stand and whose inventions they now use.

  11. Surgeons and their tools: a history of surgical instruments and their innovators--part I: place the scissors on the Mayo stand.

    Science.gov (United States)

    El-Sedfy, Abraham; Chamberlain, Ronald S

    2014-11-01

    This is the first of five articles reviewing the historical origins of some of the more commonly used surgical instruments and takes "time out" to remind current surgeons about the surgical pioneers on whose shoulders they now stand and whose inventions they now use.

  12. Self-heating probe instrument and method for measuring high temperature melting volume change rate of material

    Science.gov (United States)

    Wang, Junwei; Wang, Zhiping; Lu, Yang; Cheng, Bo

    2013-03-01

    The castings defects are affected by the melting volume change rate of material. The change rate has an important effect on running safety of the high temperature thermal storage chamber, too. But the characteristics of existing measuring installations are complex structure, troublesome operation and low precision. In order to measure the melting volume change rate of material accurately and conveniently, a self-designed measuring instrument, self-heating probe instrument, and measuring method are described. Temperature in heating cavity is controlled by PID temperature controller; melting volume change rate υ and molten density are calculated based on the melt volume which is measured by the instrument. Positive and negative υ represent expansion and shrinkage of the sample volume after melting, respectively. Taking eutectic LiF+CaF2 for example, its melting volume change rate and melting density at 1 123 K are -20.6% and 2 651 kg·m-3 measured by this instrument, which is only 0.71% smaller than literature value. Density and melting volume change rate of industry pure aluminum at 973 K and analysis pure NaCl at 1 123 K are detected by the instrument too. The measure results are agreed with report values. Measuring error sources are analyzed and several improving measures are proposed. In theory, the measuring errors of the change rate and molten density which are measured by the self-designed instrument is nearly 1/20-1/50 of that measured by the refitted mandril thermal expansion instrument. The self-designed instrument and method have the advantages of simple structure, being easy to operate, extensive applicability for material, relatively high accuracy, and most importantly, temperature and sample vapor pressure have little effect on the measurement accuracy. The presented instrument and method solve the problems of complicated structure and procedures, and large measuring errors for the samples with high vapor pressure by existing installations.

  13. Instrumentation

    Institute of Scientific and Technical Information of China (English)

    2016-01-01

    Journal Scope:Instrumentation is a high quality open access peer reviewed research journal.Authors are solicited to contribute to these journals by submitting articles that illustrate most up-to-date research results,projects,surveying works and industrial experiences that describe significant advances in the instrumental science.The mission of the Instrumentation is to provide a platform for the researchers,academicians,

  14. Shortened OR time and decreased patient risk through use of a modular surgical instrument with artificial intelligence.

    Science.gov (United States)

    Miller, David J; Nelson, Carl A; Oleynikov, Dmitry

    2009-05-01

    With a limited number of access ports, minimally invasive surgery (MIS) often requires the complete removal of one tool and reinsertion of another. Modular or multifunctional tools can be used to avoid this step. In this study, soft computing techniques are used to optimally arrange a modular tool's functional tips, allowing surgeons to deliver treatment of improved quality in less time, decreasing overall cost. The investigators watched University Medical Center surgeons perform MIS procedures (e.g., cholecystectomy and Nissen fundoplication) and recorded the procedures to digital video. The video was then used to analyze the types of instruments used, the duration of each use, and the function of each instrument. These data were aggregated with fuzzy logic techniques using four membership functions to quantify the overall usefulness of each tool. This allowed subsequent optimization of the arrangement of functional tips within the modular tool to decrease overall time spent changing instruments during simulated surgical procedures based on the video recordings. Based on a prototype and a virtual model of a multifunction laparoscopic tool designed by the investigators that can interchange six different instrument tips through the tool's shaft, the range of tool change times is approximately 11-13 s. Using this figure, estimated time savings for the procedures analyzed ranged from 2.5 to over 32 min, and on average, total surgery time can be reduced by almost 17% by using the multifunction tool.

  15. Instrumentation

    Energy Technology Data Exchange (ETDEWEB)

    Decreton, M

    2001-04-01

    SCK-CEN's research and development programme on instrumentation involves the assessment and the development of sensitive measurement systems used within a radiation environment. Particular emphasis is on the assessment of optical fibre components and their adaptability to radiation environments. The evaluation of ageing processes of instrumentation in fission plants, the development of specific data evaluation strategies to compensate for ageing induced degradation of sensors and cable performance form part of these activities. In 2000, particular emphasis was on in-core reactor instrumentation applied to fusion, accelerator driven and water-cooled fission reactors. This involved the development of high performance instrumentation for irradiation experiments in the BR2 reactor in support of new instrumentation needs for MYRRHA, and for diagnostic systems for the ITER reactor.

  16. The impact of the use of different types of gloves and bare hands for preparation of clean surgical instruments 1

    Science.gov (United States)

    Bruna, Camila Quartim de Moraes; de Souza, Rafael Queiroz; Massaia, Irineu Francisco Silva; Cruz, Áurea Silveira; Graziano, Kazuko Uchikawa

    2016-01-01

    ABSTRACT Objectives: to determine if there are differences on the safety of the preparation of clean surgical instruments using different types of gloves and bare hands and evaluate the microbiological load of these preparations without gloves. Method: laboratory procedure with a pragmatic approach, in which the samples were handled with different types of gloves and bare hands. In addition, cytotoxicity assays were carried out by means of the agar diffusion method. Further samples were subjected to microbiological analysis after being handled without gloves. Results: none of the samples showed cytotoxic effect. All microbiological cultures showed growth of microorganisms, but no microorganism has been recovered after autoclaving. Conclusion: there were no differences in the cytotoxic responses regarding the use of different types of gloves and bare hands in the handling of clean surgical instruments, which could entail iatrogenic risk. It is noteworthy that the use of gloves involves increase in the costs of process and waste generation, and the potential allergenic risk to latex. PMID:27737375

  17. Design and testing of microfabricated surgical tools for large animal probe insertion

    Energy Technology Data Exchange (ETDEWEB)

    Jorgensen, Shelly [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2016-08-05

    Neural probes provide therapeutic stimulation for neuropsychiatric disorders or record neural activity to investigate the workings of the brain. Researchers utilize 6 mm long temporary silicon stiffeners attached with biodissolvable adhesive to insert flexible neural probes into rat brains, but increasing the probe length fivefold makes inserting large animal probes a significant challenge because of an increased potential for buckling. This study compared the insertion success rates of 6 mm and 30 mm long silicon stiffeners that were 80 μm wide and 30 μm thick, and ascertained the material thickness and modulus of elasticity that would provide successful insertion for a 30 mm probe. Using a microdrive, stiffeners were inserted into an agarose brain phantom at controlled insertion speeds while being video-recorded. Twenty-five percent of the 30 mm silicon stiffeners fully inserted at speeds approximately four times higher than the target rate of 0.13 mm/s, while 100 percent of the 6 mm silicon stiffeners inserted successfully at target speed. Critical buckling loads (Pcr) were calculated for the 6 mm and 30 mm silicon stiffeners, and for 30 mm diamond and tungsten stiffeners, with thicknesses varying from 30-80 μm. Increasing the thickness of the material by 10 μm, 20 μm and 30 μm improved the Pcr by 2.4, 4.7 and 8.2 times, respectively, independent of the material, and substituting diamond for silicon multiplied the buckling capacity by 5.0 times. Stiffeners made of silicon for large animal probe insertion are not strong enough to withstand buckling upon insertion without a significant increase in thickness. Replacing silicon with diamond and increasing the thickness of the stiffener to 50 μm would afford a stiffener with the same Pcr capacity as the 6 mm silicon stiffener that had a 100 percent insertion success rate. Experiments should continue with diamond to determine a minimum thickness that will ensure successful

  18. 28 CFR 552.13 - X-ray, major instrument, fluoroscope, or surgical intrusion.

    Science.gov (United States)

    2010-07-01

    ... INSTITUTIONAL MANAGEMENT CUSTODY Searches of Housing Units, Inmates, and Inmate Work Areas § 552.13 X-ray, major... 28 Judicial Administration 2 2010-07-01 2010-07-01 false X-ray, major instrument, fluoroscope, or... reasons only, with the inmate's consent. (b) The institution physician may authorize use of an X-ray...

  19. Attaining high bending stiffness by full actuation in steerable minimally invasive surgical instruments.

    Science.gov (United States)

    Jelínek, Filip; Gerboni, Giada; Henselmans, Paul W J; Pessers, Rob; Breedveld, Paul

    2015-04-01

    Steerable instruments are a promising trend in minimally invasive surgery (MIS), due to their manoeuvring capabilities enabling reaching over obstacles. Despite the great number of steerable joint designs, currently available steerable tips tend to be vulnerable to external loading, thus featuring low bending stiffness. This work aims to provide empirical evidence that the bending stiffness can be considerably increased by using fully actuated joint constructions, enabling left/right and up/down tip rotations with the minimum of two degrees of freedom (DOF), rather than conventional underactuated constructions enabling these rotations with more than two DOF. A steerable MIS instrument prototype with a fully actuated joint construction was compared to state-of-the-art underactuated steerable instruments in a number of tip deflection experiments. The tip deflections due to loading were measured by means of a universal testing machine in four bending scenarios: straight and bent over 20°, 40° and 60°. The experimental results support the claim that a fully actuated joint construction exhibits a significantly larger bending stiffness than an underactuated joint construction. Furthermore, it was shown that the underactuated instrument tips show a considerable difference between their neutral positions before and after loading, which could also be greatly minimised by full actuation.

  20. Instrumentation

    Energy Technology Data Exchange (ETDEWEB)

    Decreton, M

    2002-04-01

    SCK-CEN's R and D programme on instrumentation involves the development of advanced instrumentation systems for nuclear applications as well as the assessment of the performance of these instruments in a radiation environment. Particular emphasis is on the use of optical fibres as umbilincal links of a remote handling unit for use during maintanance of a fusion reacor, studies on the radiation hardening of plasma diagnostic systems; investigations on new instrumentation for the future MYRRHA accelerator driven system; space applications related to radiation-hardened lenses; the development of new approaches for dose, temperature and strain measurements; the assessment of radiation-hardened sensors and motors for remote handling tasks and studies of dose measurement systems including the use of optical fibres. Progress and achievements in these areas for 2001 are described.

  1. Instrumentation

    Energy Technology Data Exchange (ETDEWEB)

    Decreton, M

    2000-07-01

    SCK-CEN's research and development programme on instrumentation aims at evaluating the potentials of new instrumentation technologies under the severe constraints of a nuclear application. It focuses on the tolerance of sensors to high radiation doses, including optical fibre sensors, and on the related intelligent data processing needed to cope with the nuclear constraints. Main achievements in these domains in 1999 are summarised.

  2. Standard management and maintenance of robot surgical instruments%机器人手术器械规范化管理及保养探讨

    Institute of Scientific and Technical Information of China (English)

    银彩霞; 苑景; 赵悦; 董薪; 李丽霞; 孙建荷

    2011-01-01

    Objective To study how to prolong the working life of robot surgical instruments by strengthening their management and maintenance. Methods A series of regulations for the management and maintenance of robot surgical instruments were established. Results The working life of robot surgical instruments was prolonged and the satisfaction score of surgeons increased after implementation of the regulations for the management and maintenance of robot surgical instruments. Conclusion Effective management and maintenance of robot surgical instruments can prolong their working life, shorten the operation time, and improve the operation level.%目的 探讨达芬奇机器人手术器械日常使用管理及保养,延长器械使用寿命.方法 建立规范化机器人器械使用管理及保养条例.结果 器械使用寿命得以延长,医生满意度调查分数得到提高.结论 机器人设备、器械得到有效的管理和保养,延长了使用寿命,缩短了手术时间,提高了手术配合质量.

  3. PICASSO-SLP: a Langmuir probe instrument for monitoring the upper ionosphere on board a pico-satellite

    Science.gov (United States)

    Ranvier, Sylvain; Anciaux, Michel; Cardoen, Pepijn; Gamby, Emmanuel; Bonnewijn, Sabrina; De Keyser, Johan; Echim, Marius; Pieroux, Didier

    2016-04-01

    A novel Langmuir probe instrument, which will fly on board the Pico-Satellite for Atmospheric and Space Science Observations (PICASSO), is under development at the Royal Belgian Institute for Space Aeronomy. PICASSO, an ESA in-orbit demonstrator, is a triple unit CubeSat of dimensions 340.5x100x100 mm. The sweeping Langmuir probe (SLP) instrument, which includes four thin cylindrical probes whose electrical potential is swept, is designed to measure both plasma density and electron temperature at an altitude varying from about 400 km up to 700 km from a high inclination orbit. Therefore, the plasma density is expected to fluctuate over a wide range, from about 1e8/m³ at high latitude and high altitude up to several times 1e12/m³ at low/mid latitude and low altitude. The electron temperature is expected to lie between approximately 1.000 K and 10.000 K. Given the high inclination of the orbit, the SLP instrument will allow a global monitoring of the ionosphere with a maximum spatial resolution of the order of 150 m for the electron density and temperature, and up to a few meters for electron density only. The main goals are to study 1) the ionosphere-plasmasphere coupling, 2) the subauroral ionosphere and corresponding magnetospheric features, 3) auroral structures, 4) polar caps, 5) for the density, the multi-scale behaviour, spectral properties and turbulence of processes typical for the auroral regions, and 6) ionospheric dynamics via coordinated observations with EISCAT's heating radar. Along the orbit, the Debye length is expected to vary from a few millimetres up to a few meters. Due to the tight constraints in terms of mass and volume inherent to pico-satellites, the use of long booms, which would guarantee that the probes are outside the sheath of the spacecraft (several Debye lengths away), is not possible. Consequently, the probes might be in the sheath of the spacecraft in polar regions. Extensive modelling and simulations of the sheath effects on the

  4. Instruments

    Energy Technology Data Exchange (ETDEWEB)

    Buehrer, W. [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    1996-12-31

    The present paper mediates a basic knowledge of the most commonly used experimental techniques. We discuss the principles and concepts necessary to understand what one is doing if one performs an experiment on a certain instrument. (author) 29 figs., 1 tab., refs.

  5. Instrumentation

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    Journal Scope:Instrumentation is a high quality open access peer reviewed research journal,Authors are solicited to contribute to these journals by submitting articles that illustrate most up-to-date research results,projects,surveying works and industrial

  6. Human cadavers to evaluate prototypes of minimally invasive surgical instruments: A feasibility study.

    Science.gov (United States)

    van den Haak, Lukas; Alleblas, Chantal; Rhemrev, Johann P; Scheltes, Jules; Nieboer, Bertho; Jansen, Frank Willem

    2017-09-15

    New technology should be extensively tested before it is tried on patients. Unfortunately representative models are lacking. In theory, fresh frozen human cadavers are excellent models. To identify strengths and weaknesses of fresh frozen human cadavers as research models for new technology prior to implementation in gynecological surgery. During pre-clinical validation studies regarding the MobiSep uterine manipulator, test procedures were performed on fresh frozen cadavers. Both the experimental setup as the performance of the prototype were assessed. Five tests including six human cadavers were performed. Major changes were made to the MobiSep prototype design. The cadavers of two tests closely resembled surgical experiences as found in live patients. The anatomy of 4 of the 6 cadavers was not fully representative due to atrophy of the internal genitalia caused by age and due to the presence of pathology such extensive tumorous tissue. The cadaver tests provided vital information regarding design and functionality, that failed to emerge during the in-vitro testing. However, experiments are subject to anatomical uncertainties or restrictions. Consequently, the suitability of a cadaver should be carefully assessed before it is used for testing new technology.

  7. Vertebral Osteomyelitis Caused by Mycobacterium abscessus Surgically Treated Using Antibacterial Iodine-Supported Instrumentation

    Directory of Open Access Journals (Sweden)

    Satoshi Kato

    2014-01-01

    Full Text Available Mycobacterium abscessus infections rarely develop in healthy individuals, and mostly they occur in immunocompromised hosts. Vertebral osteomyelitis due to Mycobacterium abscessus is very rare and only three previous cases of spinal infection caused by Mycobacterium abscessus have been reported. Mycobacterium abscessus isolates are uniformly resistant to antituberculous agents and can display a virulent biofilm-forming phenotype. The patient was a 67-year-old woman with vertebral osteomyelitis of the L1-2. She was healthy without immune-suppressed condition, history of trauma, or intravenous drug use. The smear examination of the specimen harvested by CT-guided puncture of the paravertebral abscess revealed Mycobacterium abscessus. Her disease condition did not abate with conservative treatment using antimicrobial chemotherapy. Radical debridement of the vertebral osteomyelitis and anterior reconstruction from T12 to L2 using antibacterial iodine-supported instrumentation were performed. Chemotherapy using clarithromycin, amikacin, and imipenem was applied for 6 months after surgery as these antibiotics had been proven to be effective to Mycobacterium abscessus after surgery. Two years after surgery, the infected anterior site healed and bony fusion was successfully achieved without a recurrence of infection.

  8. Incidence and risk of delayed surgical site infection following instrumented lumbar spine fusion.

    Science.gov (United States)

    Lewkonia, Peter; DiPaola, Christian; Street, John

    2016-01-01

    We reviewed a retrospective case series of patients with delayed infections after spinal fusion, and surveyed medical experts in Canada and the USA regarding their use of prophylactic antibiotics for patients undergoing invasive procedures following spine surgery. Infections after spinal fusion are a relatively common complication, which typically occur early in the postoperative period. Infections which occur more than 3months from the index procedure are rare and are often caused by atypical pathogens. The proportion of infections that required debridement and occurred 6 months after the index procedure was 4.3% (7/162). Over 85% of these infections were polymicrobial, with one third of those containing methicillin-resistant Staphylococcus aureus. The most common operative indications were either trauma or tumour, and most patients with a delayed infection had a distant chronic infection. The majority of spine experts do not routinely recommend prophylactic antibiotics for invasive procedures after spine fusion. In the multivariate analysis, experts were more likely to recommend antibiotics for patients undergoing a non-dental procedure, those who were diabetic, and those who were greater than 1year out from their procedure. In summary, the delayed presentation of infection after instrumented spinal fusion is a rare but serious complication. However, due to its infrequency, routine prophylaxis to prevent haematogenous seeding is likely unnecessary. Copyright © 2015 Elsevier Ltd. All rights reserved.

  9. A measurement of the TPMU - PROBA II Microsatellite Instrument and its comparison with the SWARM Langmuir Probes results

    Science.gov (United States)

    Podolska, Katerina; Hruska, Frantisek; Truhlik, Vladimir

    2016-04-01

    This contribution deals with the long-term measurement of the floating potential (FP) and the electron temperature (Te) provided by the Thermal Plasma Measurement Unit (TPMU) scientific instrument on-board the PROBA II microsatellite. The device is working with limitations of scientific measurements caused very probably by installed on-board software. This brings lower data volume as it was planned. Affected are the ion measurement and partially the electron temperature measurement. We present comparisons of the TPMU long-term measurement of the FP and the Te with the Te and the FP SWARM Langmuir Probes measured data. We implement the method of stochastic comparison of the probability distribution between measurements of FP and Te of both instruments to recognize seasonal and solar activity similarities. The analysis is performed for all seasons of the period from the years 2013 - 2015 for the Equatorial region, North and South hemisphere. The data are divided into the three groups by the geographical latitude to the Nothern hemisphere (lat>15'), the Southern hemisphere (latreflect also changes of the Kp index. Changes over the solar cycle are also visible. The main TPMU goal is the validation and testing of new design of the instrument which is necessary for possible applications of TPMU design for future scientific missions.

  10. Integrative advances for OCT-guided ophthalmic surgery and intraoperative OCT: microscope integration, surgical instrumentation, and heads-up display surgeon feedback.

    Directory of Open Access Journals (Sweden)

    Justis P Ehlers

    Full Text Available PURPOSE: To demonstrate key integrative advances in microscope-integrated intraoperative optical coherence tomography (iOCT technology that will facilitate adoption and utilization during ophthalmic surgery. METHODS: We developed a second-generation prototype microscope-integrated iOCT system that interfaces directly with a standard ophthalmic surgical microscope. Novel features for improved design and functionality included improved profile and ergonomics, as well as a tunable lens system for optimized image quality and heads-up display (HUD system for surgeon feedback. Novel material testing was performed for potential suitability for OCT-compatible instrumentation based on light scattering and transmission characteristics. Prototype surgical instruments were developed based on material testing and tested using the microscope-integrated iOCT system. Several surgical maneuvers were performed and imaged, and surgical motion visualization was evaluated with a unique scanning and image processing protocol. RESULTS: High-resolution images were successfully obtained with the microscope-integrated iOCT system with HUD feedback. Six semi-transparent materials were characterized to determine their attenuation coefficients and scatter density with an 830 nm OCT light source. Based on these optical properties, polycarbonate was selected as a material substrate for prototype instrument construction. A surgical pick, retinal forceps, and corneal needle were constructed with semi-transparent materials. Excellent visualization of both the underlying tissues and surgical instrument were achieved on OCT cross-section. Using model eyes, various surgical maneuvers were visualized, including membrane peeling, vessel manipulation, cannulation of the subretinal space, subretinal intraocular foreign body removal, and corneal penetration. CONCLUSIONS: Significant iterative improvements in integrative technology related to iOCT and ophthalmic surgery are demonstrated.

  11. The impact of the use of different types of gloves and bare hands for preparation of clean surgical instruments.

    Science.gov (United States)

    Bruna, Camila Quartim de Moraes; Souza, Rafael Queiroz de; Massaia, Irineu Francisco Silva; Cruz, Áurea Silveira; Graziano, Kazuko Uchikawa

    2016-10-10

    to determine if there are differences on the safety of the preparation of clean surgical instruments using different types of gloves and bare hands and evaluate the microbiological load of these preparations without gloves. laboratory procedure with a pragmatic approach, in which the samples were handled with different types of gloves and bare hands. In addition, cytotoxicity assays were carried out by means of the agar diffusion method. Further samples were subjected to microbiological analysis after being handled without gloves. none of the samples showed cytotoxic effect. All microbiological cultures showed growth of microorganisms, but no microorganism has been recovered after autoclaving. there were no differences in the cytotoxic responses regarding the use of different types of gloves and bare hands in the handling of clean surgical instruments, which could entail iatrogenic risk. It is noteworthy that the use of gloves involves increase in the costs of process and waste generation, and the potential allergenic risk to latex. determinar se existe diferenças na segurança do preparo de instrumentais cirúrgicos relacionada ao uso de distintos tipos de luvas e das mãos nuas no preparo, e avaliar a carga microbiológica destes preparados sem luvas. experimento laboratorial com abordagem pragmática, onde amostras foram manipuladas com diferentes tipos de luvas e com as mãos nuas, elaborado teste de citotoxicidade por meio da difusão em ágar. Outras Amostras sofreram análise microbiológica após serem manipuladas sem luvas. nenhuma das amostras apresentou efeito citotóxico. Todas as culturas microbiológicas apresentaram crescimento de microrganismos, embora nenhum microrganismo tenha sido recuperado após a autoclavação. não houve diferenças nas respostas citotóxicas relacionadas ao uso de diferentes tipos de luvas e das mãos nuas na manipulação do instrumental cirúrgico limpo que sinalizasse risco de iatrogenia. Ressalta-se que o uso de luvas

  12. Intensive probing of clear air convective fields by radar and instrumented drone aircraft.

    Science.gov (United States)

    Rowland, J. R.

    1972-01-01

    Clear air convective fields were probed in three summer experiments (1969, 1970, and 1971) on an S-band monopulse tracking radar at Wallops Island, Virginia, and a drone aircraft with a takeoff weight of 5.2 kg, wingspan of 2.5 m, and cruising glide speed of 10.3 m/sec. The drone was flown 23.2 km north of the radar and carried temperature, pressure/altitude, humidity, and vertical and airspeed velocity sensors. Extensive time-space convective field data were obtained by taking a large number of RHI and PPI pictures at short intervals of time. The rapidly changing overall convective field data obtained from the radar could be related to the meteorological information telemetered from the drone at a reasonably low cost by this combined technique.

  13. Analysis of risk factors for loss of lumbar lordosis in patients who had surgical treatment with segmental instrumentation for adolescent idiopathic scoliosis.

    Science.gov (United States)

    Trobisch, Per D; Samdani, Amer F; Betz, Randal R; Bastrom, Tracey; Pahys, Joshua M; Cahill, Patrick J

    2013-06-01

    Iatrogenic flattening of lumbar lordosis in patients with adolescent idiopathic scoliosis (AIS) was a major downside of first generation instrumentation. Current instrumentation systems allow a three-dimensional scoliosis correction, but flattening of lumbar lordosis remains a significant problem which is associated with decreased health-related quality of life. This study sought to identify risk factors for loss of lumbar lordosis in patients who had surgical correction of AIS with the use of segmental instrumentation. Patients were included if they had surgical correction for AIS with segmental pedicle screw instrumentation Lenke type 1 or 2 and if they had a minimum follow-up of 24 months. Two groups were created, based on the average loss of lumbar lordosis. The two groups were then compared and multivariate analysis was performed to identify parameters that correlated to loss of lumbar lordosis. Four hundred and seventeen patients were analyzed for this study. The average loss of lumbar lordosis at 24 months follow-up was an increase of 10° lordosis for group 1 and a decrease of 15° for group 2. Risk factors for loss of lumbar lordosis included a high preoperative lumbar lordosis, surgical decrease of thoracic kyphosis, and the particular operating surgeon. The lowest instrumented vertebra or spinopelvic parameters were two of many parameters that did not seem to influence loss of lumbar lordosis. This study identified important risk factors for decrease of lumbar lordosis in patients who had surgical treatment for AIS with segmental pedicle screw instrumentation, including a high preoperative lumbar lordosis, surgical decrease of thoracic kyphosis, and factors attributable to a particular operating surgeon that were not quantified in this study.

  14. Evaluation of surgical strategy of conventional vs. percutaneous robot-assisted spinal trans-pedicular instrumentation in spondylodiscitis.

    Science.gov (United States)

    Keric, Naureen; Eum, David J; Afghanyar, Feroz; Rachwal-Czyzewicz, Izabela; Renovanz, Mirjam; Conrad, Jens; Wesp, Dominik M A; Kantelhardt, Sven R; Giese, Alf

    2017-03-01

    Robot-assisted percutaneous insertion of pedicle screws is a recent technique demonstrating high accuracy. The optimal treatment for spondylodiscitis is still a matter of debate. We performed a retrospective cohort study on surgical patients treated with pedicle screw/rod placement alone without the application of intervertebral cages. In this collective, we compare conventional open to a further minimalized percutaneous robot-assisted spinal instrumentation, avoiding a direct contact of implants and infectious focus. 90 records and CT scans of patients treated by dorsal transpedicular instrumentation of the infected segments with and without decompression and antibiotic therapy were analysed for clinical and radiological outcome parameters. 24 patients were treated by free-hand fluoroscopy-guided surgery (121 screws), and 66 patients were treated by percutaneous robot-assisted spinal instrumentation (341 screws). Accurate screw placement was confirmed in 90 % of robot-assisted and 73.5 % of free-hand placed screws. Implant revision due to misplacement was necessary in 4.95 % of the free-hand group compared to 0.58 % in the robot-assisted group. The average intraoperative X-ray exposure per case was 0.94 ± 1.04 min in the free-hand group vs. 0.4 ± 0.16 min in the percutaneous group (p = 0.000). Intraoperative adverse events were observed in 12.5 % of free-hand placed pedicle screws and 6.1 % of robot robot-assisted screws. The mean postoperative hospital stay in the free-hand group was 18.1 ± 12.9 days, and in percutaneous group, 13.8 ± 5.6 days (p = 0.012). This study demonstrates that the robot-guided insertion of pedicle screws is a safe and effective procedure in lumbar and thoracic spondylodiscitis with higher accuracy of implant placement, lower radiation dose, and decreased complication rates. Percutaneous spinal dorsal instrumentation seems to be sufficient to treat lumbar and thoracic spondylodiscitis.

  15. The FIELDS Instrument Suite for Solar Probe Plus. Measuring the Coronal Plasma and Magnetic Field, Plasma Waves and Turbulence, and Radio Signatures of Solar Transients

    Science.gov (United States)

    Bale, S. D.; Goetz, K.; Harvey, P. R.; Turin, P.; Bonnell, J. W.; Dudok de Wit, T.; Ergun, R. E.; MacDowall, R. J.; Pulupa, M.; Andre, M.; Bolton, M.; Bougeret, J.-L.; Bowen, T. A.; Burgess, D.; Cattell, C. A.; Chandran, B. D. G.; Chaston, C. C.; Chen, C. H. K.; Choi, M. K.; Connerney, J. E.; Cranmer, S.; Diaz-Aguado, M.; Donakowski, W.; Drake, J. F.; Farrell, W. M.; Fergeau, P.; Fermin, J.; Fischer, J.; Fox, N.; Glaser, D.; Goldstein, M.; Gordon, D.; Hanson, E.; Harris, S. E.; Hayes, L. M.; Hinze, J. J.; Hollweg, J. V.; Horbury, T. S.; Howard, R. A.; Hoxie, V.; Jannet, G.; Karlsson, M.; Kasper, J. C.; Kellogg, P. J.; Kien, M.; Klimchuk, J. A.; Krasnoselskikh, V. V.; Krucker, S.; Lynch, J. J.; Maksimovic, M.; Malaspina, D. M.; Marker, S.; Martin, P.; Martinez-Oliveros, J.; McCauley, J.; McComas, D. J.; McDonald, T.; Meyer-Vernet, N.; Moncuquet, M.; Monson, S. J.; Mozer, F. S.; Murphy, S. D.; Odom, J.; Oliverson, R.; Olson, J.; Parker, E. N.; Pankow, D.; Phan, T.; Quataert, E.; Quinn, T.; Ruplin, S. W.; Salem, C.; Seitz, D.; Sheppard, D. A.; Siy, A.; Stevens, K.; Summers, D.; Szabo, A.; Timofeeva, M.; Vaivads, A.; Velli, M.; Yehle, A.; Werthimer, D.; Wygant, J. R.

    2016-12-01

    NASA's Solar Probe Plus (SPP) mission will make the first in situ measurements of the solar corona and the birthplace of the solar wind. The FIELDS instrument suite on SPP will make direct measurements of electric and magnetic fields, the properties of in situ plasma waves, electron density and temperature profiles, and interplanetary radio emissions, amongst other things. Here, we describe the scientific objectives targeted by the SPP/FIELDS instrument, the instrument design itself, and the instrument concept of operations and planned data products.

  16. Pressure/temperature fluid cell apparatus for the neutron powder diffractometer instrument: probing atomic structure in situ.

    Science.gov (United States)

    Wang, Hsiu-Wen; Fanelli, Victor R; Reiche, Helmut M; Larson, Eric; Taylor, Mark A; Xu, Hongwu; Zhu, Jinlong; Siewenie, Joan; Page, Katharine

    2014-12-01

    This contribution describes a new local structure compatible gas/liquid cell apparatus for probing disordered materials at high pressures and variable temperatures in the Neutron Powder Diffraction instrument at the Lujan Neutron Scattering Center, Los Alamos National Laboratory. The new sample environment offers choices for sample canister thickness and canister material type. Finite element modeling is utilized to establish maximum allowable working pressures of 414 MPa at 15 K and 121 MPa at 600 K. High quality atomic pair distribution function data extraction and modeling have been demonstrated for a calibration standard (Si powder) and for supercritical and subcritical CO2 measurements. The new sample environment was designed to specifically target experimental studies of the local atomic structures involved in geologic CO2 sequestration, but will be equally applicable to a wide variety of energy applications, including sorption of fluids on nano/meso-porous solids, clathrate hydrate formation, catalysis, carbon capture, and H2 and natural gas uptake/storage.

  17. A study on factors of dissatisfaction and stress of the blacksmiths resulting from the organizational culture in the surgical instrument industry of India

    Directory of Open Access Journals (Sweden)

    Tirthankar Ghosh

    2011-01-01

    Full Text Available Background: It is important to understand what motivates workers and the extent to which the organization and other contextual variables satisfy them. The aim of the study was to determine factors of dissatisfaction resulting from the organizational culture among the blacksmiths involved in the surgical instrument industry. Materials and Methods: Fifty male surgical blacksmiths each of the skilled and unskilled groups of the forging section were selected. Organizational Role Stress Scale was used to measure the individuals′ role stress and several forms of conflict within an organization. Also, the organizational culture and personal involvement in an organization was measured among the surgical blacksmiths. Results: The mean score for total role stress for Skilled was 71.7 and for unskilled was 77.2. The most frequent type of organizational culture was reported to be hierarchy, both by skilled and unskilled surgical blacksmiths, followed by market and clan culture. Conclusion: This study shows that the skilled surgical blacksmiths have lower level of stress and conflicts in comparison with unskilled surgical blacksmiths. Both skilled and unskilled surgical blacksmiths estimated their level of personal involvement as low and indicated insufficient involvement in work teams. The satisfaction of the employees with their status and role in the organizational culture was also poor for both skilled and unskilled surgical blacksmiths.

  18. Medical devices; general and plastic surgery devices; classification of the powered surgical instrument for improvement in the appearance of cellulite. Final order.

    Science.gov (United States)

    2014-06-03

    The Food and Drug Administration (FDA) is classifying the powered surgical instrument for improvement in the appearance of cellulite into class II (special controls). The Agency is classifying the device into class II (special controls) in order to provide a reasonable assurance of safety and effectiveness of the device.

  19. Taking label-free optical spectroscopy techniques into the operating theatre: biopsy needles and surgical guidance probes (Conference Presentation)

    Science.gov (United States)

    Leblond, Frédéric

    2017-02-01

    Recent advances will be described relating to the development and clinical translation of optical spectroscopy techniques designed to guide surgical interventions in brain and prostate oncology applications. The use of molecular imaging guidance systems can enable true intra-operative tissue identification, increasing the effectiveness of cancer surgery and potentially positively impacting patient survival. Surgical resection is a fundamental cancer treatment, but its effectiveness is reduced by the inability to rapidly and accurately identify cancer margins. We will introduce a portable intraoperative label-free multimodal optical spectroscopy system combining intrinsic fluorescence, diffuse reflectance, and Raman spectroscopy that can identify cancer in situ during surgery. We will show that this on-line guidance system can detect primary cancer such as glioma as well as metastatic melanoma and cancer of the lung and colon with an accuracy, sensitivity, and specificity of 97%, 100%, and 93% respectively. Moreover, a method will be presented, along with preliminary tissue classification results, based on the interrogation of whole human prostates from prostatectomies. The development and in vivo validation of an optical brain needle biopsy instrument will be presented demonstrating its ability to detect bulk tumor using Raman spectroscopy with the goal of reducing the number of non-diagnostic samples during a procedure. The extraction of tissue can cause life-threatening hemorrhage because of significant blood vessel injury during the procedure. We will demonstrate that a sub-diffuse optical tomography technique integrated with a commercial biopsy needle can detect the presence of blood vessels to limit the hemorrhage risk.

  20. The SPICAV-SOIR instrument probing the atmosphere of Venus: an overview

    Science.gov (United States)

    Trompet, Loïc; Mahieux, Arnaud; Wilquet, Valérie; Robert, Séverine; Chamberlain, Sarah; Thomas, Ian; Carine Vandaele, Ann; Bertaux, Jean-Loup

    2016-04-01

    The Solar Occultation in the Infrared (SOIR) channel mounted on top of the SPICAV instrument of the ESA's Venus Express mission has observed the atmosphere of Venus during more than eight years. This IR spectrometer (2.2-4.3 μm) with a high spectral resolution (0.12 cm-1) combined an echelle grating with an acousto-optic tunable filter for order selection. SOIR performed more than 1500 solar occultation measurements leading to about two millions spectra. The Royal Belgian Institute for Space Aeronomy (BIRA-IASB) was in charge of SOIR's development and operations as well as its data pipeline. BIRA-IASB carried out several studies on the composition of Venus mesosphere and lower thermosphere: carbon dioxide, carbon monoxide, hydrogen halide (HF, HCl, DF, DCl), sulfur dioxide, water (H2O, HDO) as well as sulphuric acid aerosols in the upper haze of Venus. Density and temperature profiles of the upper atmosphere of Venus (60 km to 170 km) at the terminator have been retrieved from SOIR's spectra using different assumptions, wherein the hydrostatic equilibrium and the local thermodynamical equilibrium in the radiative transfer calculations. These results allow us to produce an Atmospheric model of Venus called Venus Atmosphere from SOIR measurements at the Terminator (VAST). Data obtained by SOIR will also contribute to update the Venus International Reference Atmosphere (VIRA). Recently, the treatment of the raw data to transmittance has been optimized, and a new dataset of spectra has been produced. All raw spectra (PSA level 2) as well as calibrated spectra (PSA level 3) have been delivered to ESA's Planetary Science Archive (PDSPSA). Consequently the re-analysis of all spectra has been undergone. We will briefly present the improvements implemented in the data pipeline. We will also show a compilation of results obtained by the instrument considering the complete mission duration.

  1. Combination of Instrumented Nanoindentation and Scanning Probe Microscopy for Adequate Mechanical Surface Testing

    Institute of Scientific and Technical Information of China (English)

    Enrico Tam; Mikhail Petrzhik; Dmitry Shtansky; Marie-Paule Delplancke-Ogletree

    2009-01-01

    The elastic indentation modulus and hardness of standard bulk materials and advanced thin films were deter-mined by using the nanoindentation technique followed by the Oliver- Pharr post-treatment. After measure-ments with different loading/unloading schemes on chemically polished bulk titanium a substantial decrease of both modulus and hardness vs an increasing loading time was found, Then, hard nanostructured TiBN and TiCrBN thin films deposited by magnetron sputtering (using multiphase targets) on substrates of high roughness (sintered hard metal) and low roughness (silicon) were studied. Experimental modulus and hardness characterized by using two different nanoindenter tools were within the limits of standard deviation. However, a strong effect of roughness on the spread of the experimental values was observed and it was found that hard-ness and elastic indentation modulus obeyed a Gaussian distribution. The experimental data were discussed together with scanning probe microscopy (SPM) images of typical imprints taken after the nanoindentation tests and the local topography's strong correlation with the results of nanoindentation was described.

  2. Detection of Transionospheric SuperDARN HF Waves by the Radio Receiver Instrument on the enhanced Polar Outflow Probe Satellite

    Science.gov (United States)

    Gillies, R. G.; Yau, A. W.; James, H. G.; Hussey, G. C.; McWilliams, K. A.

    2014-12-01

    The enhanced Polar Outflow Probe (ePOP) Canadian small-satellite was launched in September 2013. Included in this suite of eight scientific instruments is the Radio Receiver Instrument (RRI). The RRI has been used to measure VLF and HF radio waves from various ground and spontaneous ionospheric sources. The first dedicated ground transmission that was detected by RRI was from the Saskatoon Super Dual Auroral Radar Network (SuperDARN) radar on Nov. 7, 2013 at 14 MHz. Several other passes over the Saskatoon SuperDARN radar have been recorded since then. Ground transmissions have also been observed from other radars, such as the SPEAR, HAARP, and SURA ionospheric heaters. However, the focus of this study will be on the results obtained from the SuperDARN passes. An analysis of the signal recorded by the RRI provides estimates of signal power, Doppler shift, polarization, absolute time delay, differential mode delay, and angle of arrival. By comparing these parameters to similar parameters derived from ray tracing simulations, ionospheric electron density structures may be detected and measured. Further analysis of the results from the other ground transmitters and future SuperDARN passes will be used to refine these results.

  3. Empirical estimates and theoretical predictions of the shorting factor for the THEMIS double-probe electric field instrument

    Science.gov (United States)

    Califf, S.; Cully, C. M.

    2016-07-01

    Double-probe electric field measurements on board spacecraft present significant technical challenges, especially in the inner magnetosphere where the ambient plasma characteristics can vary dramatically and alter the behavior of the instrument. We explore the shorting factor for the Time History of Events and Macroscale Interactions during Substorms electric field instrument, which is a scale factor error on the measured electric field due to coupling between the sensing spheres and the long wire booms, using both an empirical technique and through simulations with varying levels of fidelity. The empirical data and simulations both show that there is effectively no shorting when the spacecraft is immersed in high-density plasma deep within the plasmasphere and that shorting becomes more prominent as plasma density decreases and the Debye length increases outside the plasmasphere. However, there is a significant discrepancy between the data and theory for the shorting factor in low-density plasmas: the empirical estimate indicates ~0.7 shorting for long Debye lengths, but the simulations predict a shorting factor of ~0.94. This paper systematically steps through the empirical and modeling methods leading to the disagreement with the intention of motivating further study on the topic.

  4. Thermal ion imagers and Langmuir probes in the Swarm electric field instruments

    Science.gov (United States)

    Knudsen, D. J.; Burchill, J. K.; Buchert, S. C.; Eriksson, A. I.; Gill, R.; Wahlund, J.-E.; Åhlen, L.; Smith, M.; Moffat, B.

    2017-02-01

    The European Space Agency's three Swarm satellites were launched on 22 November 2013 into nearly polar, circular orbits, eventually reaching altitudes of 460 km (Swarm A and C) and 510 km (Swarm B). Swarm's multiyear mission is to make precision, multipoint measurements of low-frequency magnetic and electric fields in Earth's ionosphere for the purpose of characterizing magnetic fields generated both inside and external to the Earth, along with the electric fields and other plasma parameters associated with electric current systems in the ionosphere and magnetosphere. Electric fields perpendicular to the magnetic field B→ are determined through ion drift velocity v→i and magnetic field measurements via the relation E→⊥=-v→i×B→. Ion drift is derived from two-dimensional images of low-energy ion distribution functions provided by two Thermal Ion Imager (TII) sensors viewing in the horizontal and vertical planes; v→i is corrected for spacecraft potential as determined by two Langmuir probes (LPs) which also measure plasma density ne and electron temperature Te. The TII sensors use a microchannel-plate-intensified phosphor screen imaged by a charge-coupled device to generate high-resolution distribution images (66 × 40 pixels) at a rate of 16 s-1. Images are partially processed on board and further on the ground to generate calibrated data products at a rate of 2 s-1; these include v→i, E→⊥, and ion temperature Ti in addition to electron temperature Te and plasma density ne from the LPs.

  5. Multi-instrument probing of the polar ionosphere under steady northward IMF

    Directory of Open Access Journals (Sweden)

    S. E. Pryse

    Full Text Available Observations are presented of the polar ionosphere under steady, northward IMF. The measurements, made by six complementary experimental techniques, including radio tomography, all-sky and meridian scanning photometer optical imaging, incoherent and coherent scatter radars and satellite particle detection, reveal plasma parameters consistent with ionospheric signatures of lobe reconnection. The optical green-line footprint of the reconnection site is seen to lie in the sunward plasma convection of the lobe cells. Downstream in the region of softer precipitation the reverse energy dispersion of the incoming ions can be identified. A steep latitudinal density gradient at the equatorward edge of the precipitation identifies the general location of an adiaroic boundary, separating the open field lines of polar lobe cells from the closed field of viscous-driven cells. Enhancements in plasma density to the south of the gradient are interpreted as ionisation being reconfigured as it is thrust against the boundary by the antisunward flow of the viscous cells near noon. Each of the instruments individually provides valuable information on certain aspects of the ionosphere, but the paper demonstrates that taken together the different experiments complement each other to give a consistent and comprehensive picture of the dayside polar ionosphere..

    Key words. Ionosphere (polar ionosphere · Magnetospheric physics (magnetosphere-ionosphere interactions; polar cap phenomena

  6. Probing unexplored territories with MUSE: a second generation instrument for the VLT

    CERN Document Server

    Bacon, R; Böhm, P; Boudon, D; Brau-Nogue, S; Caillier, P; Capoani, L; Carollo, C M; Champavert, N; Contini, T; Daguise, E; Dalle, D; Delabre, B; Devriendt, J; Dreizler, S; Du Bois, J; Dupieux, M; Dupin, J P; Emsellem, E; Ferruit, P; Franx, M; Gallou, G; Gerssen, J; Guiderdoni, B; Hahn, T; Hofmann, D; Jarno, A; Kelz, A; Köhler, C; Kollatschny, W; Kosmalski, J; Laurent, F; Lilly, S J; Lizon, J; Loupias, M; Lynn, S; Manescau, A; McDermid, R M; Monstein, C; Nicklas, H; Pares, L; Pasquini, L; Pecontal-Rousset, A; Pécontal, E; Pellò, R; Petit, C; Picat, J P; Popow, E; Quirrenbach, Andreas G; Reiss, R; Renault, E; Roth, M; Schaye, J; Soucail, G; Steinmetz, M; Stroebele, S; Stuik, R; Weilbacher, P; Wozniak, H; De Zeeuw, P T

    2006-01-01

    The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph under preliminary design study. MUSE has a field of 1x1 arcmin**2 sampled at 0.2x0.2 arcsec**2 and is assisted by the VLT ground layer adaptive optics ESO facility using four laser guide stars. The simultaneous spectral range is 465-930 nm, at a resolution of R~3000. MUSE couples the discovery potential of a large imaging device to the measuring capabilities of a high-quality spectrograph, while taking advantage of the increased spatial resolution provided by adaptive optics. This makes MUSE a unique and tremendously powerful instrument for discovering and characterizing objects that lie beyond the reach of even the deepest imaging surveys. MUSE has also a high spatial resolution mode with 7.5x7.5 arcsec**2 field of view sampled at 25 milli-arcsec. In this mode MUSE should be able to obtain diffraction limited data-cubes in the 600-930 nm wavelength range. Although the MUSE design has been optimized f...

  7. Intensive probing of a clear air convective field by radar and instrumental drone aircraft.

    Science.gov (United States)

    Rowland, J. R.

    1973-01-01

    An instrumented drone aircraft was used in conjunction with ultrasensitive radar to study the development of a convective field in the clear air. Radar data are presented which show an initial constant growth rate in the height of the convective field of 3.8 m/min, followed by a short period marked by condensation and rapid growth at a rate in excess of 6.1 m/min. Drone aircraft soundings show general features of a convective field including progressive lifting of the inversion at the top of the convection and a cooling of the air at the top of the field. Calculations of vertical heat flux as a function of time and altitude during the early stages of convection show a linear decrease in heat flux with altitude to near the top of the convective field and a negative heat flux at the top. Evidence is presented which supports previous observations that convective cells overshoot their neutral buoyancy level into a region where they are cool and moist compared to their surroundings. Furthermore, only that portion of the convective cell that has overshot its neutral buoyancy level is generally visible to the radar.

  8. Intensive probing of a clear air convective field by radar and instrumental drone aircraft.

    Science.gov (United States)

    Rowland, J. R.

    1973-01-01

    An instrumented drone aircraft was used in conjunction with ultrasensitive radar to study the development of a convective field in the clear air. Radar data are presented which show an initial constant growth rate in the height of the convective field of 3.8 m/min, followed by a short period marked by condensation and rapid growth at a rate in excess of 6.1 m/min. Drone aircraft soundings show general features of a convective field including progressive lifting of the inversion at the top of the convection and a cooling of the air at the top of the field. Calculations of vertical heat flux as a function of time and altitude during the early stages of convection show a linear decrease in heat flux with altitude to near the top of the convective field and a negative heat flux at the top. Evidence is presented which supports previous observations that convective cells overshoot their neutral buoyancy level into a region where they are cool and moist compared to their surroundings. Furthermore, only that portion of the convective cell that has overshot its neutral buoyancy level is generally visible to the radar.

  9. The Super-TIGER Instrument to Probe Galactic Cosmic Ray Origins

    Science.gov (United States)

    Mitchell, John W.; Binns, W. R.; Bose, R, G.; Braun, D. L.; Christian, E. R.; Daniels, W. M; DeNolfo, G. A.; Dowkontt, P. F.; Hahne, D. J.; Hams, T.; Israel, M. H.; Klemic, J.; Labrador, A. W.; Link, J. T.; Mewaldt, R. A.; Moore, P. R.; Murphy, R. P.; Olevitch, M. A.; Rauch, B. F.; SanSebastian, F.; Sasaki, M.; Simburger, G. E.; Stone, E. C.; Waddington, C. J.

    2011-01-01

    Super-TIGER (Super Trans-Iron Galactic Element Recorder) is under construction for the first of two planned Antarctic long-duration balloon flights in December 2012. This new instrument will measure the abundances of ultra-heavy elements (30Zn and heavier), with individual element resolution, to provide sensitive tests of the emerging model of cosmic-ray origins in OB associations and models of the mechanism for selection of nuclei for acceleration. Super-TIGER builds on the techniques of TIGER, which produced the first well-resolved measurements of elemental abundances of the elements 31Ga, 32Ge, and 34Se. Plastic scintillators together with acrylic and silica-aerogel Cherenkov detectors measure particle charge. Scintillating-fiber hodoscopes track particle trajectories. Super-TIGER has an active area of 5.4 sq m, divided into two independent modules. With reduced material thickness to decrease interactions, its effective geometry factor is approx.6.4 times larger than TIGER, allowing it to measure elements up to 42Mo with high statistical precision, and make exploratory measurements up to 56Ba. Super-TIGER will also accurately determine the energy spectra of the more abundant elements from l0Ne to 28Ni between 0.8 and 10 GeV/nucleon to test the hypothesis that microquasars or other sources could superpose spectral features. We will discuss the implications of Super-TIGER measurements for the study of cosmic-ray origins and will present the measurement technique, design, status, and expected performance, including numbers of events and resolution. Details of the hodoscopes, scintillators, and Cherenkov detectors will be given in other presentations at this conference.

  10. Surgical Instrument Decontamination Unit

    Science.gov (United States)

    1989-02-15

    against rhinovirus tested both in suspension and on carriers (Mentel; 1973). Hydrogen peroxide in r2atively high concentrations (10 to 25%) is also...ultrasonic cavitation does not rely solely upon a chemical reaction between the hydroxyl radical and bacterial cell structures or components, although...from textiles without damaging the textile structure . It is used as a gas generator for foam products and very large quantities are used annually for

  11. Initial measurements of O-ion and He-ion decay rates observed from the Van Allen probes RBSPICE instrument.

    Science.gov (United States)

    Gerrard, Andrew; Lanzerotti, Louis; Gkioulidou, Matina; Mitchell, Donald; Manweiler, Jerry; Bortnik, Jacob; Keika, Kunihiro

    2014-11-01

    H-ion (∼45 keV to ∼600 keV), He-ion (∼65 keV to ∼520 keV), and O-ion (∼140 keV to ∼1130 keV) integral flux measurements, from the Radiation Belt Storm Probe Ion Composition Experiment (RBSPICE) instrument aboard the Van Allan Probes spacecraft B, are reported. These abundance data form a cohesive picture of ring current ions during the first 9 months of measurements. Furthermore, the data presented herein are used to show injection characteristics via the He-ion/H-ion abundance ratio and the O-ion/H-ion abundance ratio. Of unique interest to ring current dynamics are the spatial-temporal decay characteristics of the two injected populations. We observe that He-ions decay more quickly at lower L shells, on the order of ∼0.8 day at L shells of 3-4, and decay more slowly with higher L shell, on the order of ∼1.7 days at L shells of 5-6. Conversely, O-ions decay very rapidly (∼1.5 h) across all L shells. The He-ion decay time are consistent with previously measured and calculated lifetimes associated with charge exchange. The O-ion decay time is much faster than predicted and is attributed to the inclusion of higher-energy (> 500 keV) O-ions in our decay rate estimation. We note that these measurements demonstrate a compelling need for calculation of high-energy O-ion loss rates, which have not been adequately studied in the literature to date.

  12. 牙膏清洗陈旧性污染器械的效果观察%The effects of cleaning old contaminated surgical instruments with toothpastes

    Institute of Scientific and Technical Information of China (English)

    周红芳

    2014-01-01

    Objective:In order to improve the quality of surgical Instruments-cleaning to prevent infection in the hospital.Methods:First,scrub the seriously contaminated surgical instruments with the toothpaste, and then put them into the cleaning-disinfecting machine to be cleaned in a standard way.Result:The rate of standard-obtained surgical operation instrument cleaned with toothpaste reaches 90%and the rust-returning rate is 0;The rate of standard-obtained instrument cleaned with conventional method is 62%while the rust-returning rate reaches 37%.Conclusion:The way of removing stain/rust from the surgical operation instrument with the toothpaste is better, which saves cost ,so it is worth applying and popularizing.%目的:提高器械清洗质量,预防医院感染。方法:使用牙膏对污染严重的器械进行刷洗,再放入清洗消毒机进行规范化洗涤。结果:牙膏清洗合格率为90%,返锈率为0;常规清洗合格率为62%,返锈率为37%。结论:牙膏清洗去除污染器械的污渍和锈渍效果好,节约了成本,值得推广应用。

  13. 腹腔镜手术器械的维护保养及管理%Maintenance and Management of Laparoscopic Surgical Instruments

    Institute of Scientific and Technical Information of China (English)

    李晓

    2016-01-01

    该文对腹腔镜等精密手术器械实施规范的维护保养措施,加强其管理制度的落实,能够有效提升器械完好率,延长其使用寿命,保证器械使用安全性,避免因手术器械原因造成的医疗事故的发生。该文总结腹腔镜手术器械的维护、保养及管理措施,提高器械功能完好率。提出制定标准、规范的腹腔镜手术器械清洗、消毒、灭菌操作规程及维护保养措施,制定严格的腹腔镜器械管理制度,并严格落实。%The paper of laparoscopic surgical precision instrument implementation specification of maintenance and maintenance measures, strengthen the implementation of its management system, can effectively improve equipment intact rate, prolong the service life of and ensure the use safety of the equipment and avoid the occurrence of medical accidents caused by surgical instruments. This article summarized the maintenance, the maintenance and the management measure of the laparoscopic operation instrument, and improve the function of the instrument. Proposed to develop standards, norms of laparoscopic surgical instruments cleaning, disinfection, sterilization operation procedures and maintenance measures, strict implementation of the laparoscopic instrument management system, and strictly implement.

  14. Does the piezoelectric surgical technique produce fewer postoperative sequelae after lower third molar surgery than conventional rotary instruments? A systematic review and meta analysis.

    Science.gov (United States)

    Al-Moraissi, E A; Elmansi, Y A; Al-Sharaee, Y A; Alrmali, A E; Alkhutari, A S

    2016-03-01

    A systematic review and meta-analysis was conducted to answer the clinical question "Does the piezoelectric surgical technique produce fewer postoperative sequelae after lower third molar surgery than conventional rotary instruments?" A systematic and electronic search of several databases with specific key words, a reference search, and a manual search were performed from respective dates of inception through November 2014. The inclusion criteria were clinical human studies, including randomized controlled trials (RCTs), controlled clinical trials (CCTs), and retrospective studies, with the aim of comparing the piezoelectric surgical osteotomy technique to the standard rotary instrument technique in lower third molar surgery. Postoperative sequelae (oedema, trismus, and pain), the total number of analgesics taken, and the duration of surgery were analyzed. A total of nine articles were included, six RCTs, two CCTs, and one retrospective study. Six studies had a low risk of bias and three had a moderate risk of bias. A statistically significant difference was found between piezoelectric surgery and conventional rotary instrument surgery for lower third molar extraction with regard to postoperative sequelae (oedema, trismus, and pain) and the total number of analgesics taken (P=0.0001, P=0.0001, Ppiezoelectric osteotomy group (Ppiezoelectric surgery significantly reduced the occurrence of postoperative sequelae (oedema, trismus, and pain) and the total number of analgesics taken compared to the conventional rotary instrument technique in lower third molar surgery, but required a longer surgery time.

  15. Modeling and simulations of the double-probe electric field instrument in tenuous and cold streaming plasmas

    Science.gov (United States)

    Miyake, Y.; Cully, C. M.; Usui, H.; Nakashima, H.

    2013-12-01

    In order to increase accuracy and reliability of in-situ measurements made by scientific spacecraft, it is imperative to develop comprehensive understanding of spacecraft-plasma interactions. In space environments, not only the spacecraft charging but also surrounding plasma disturbances such as caused by the wake formation may interfere directly with in-situ measurements. The self-consistent solutions of such phenomena are necessary to assess their effects on scientific spacecraft systems. As our recent activity, we work on the modeling and simulations of Cluster double-probe instrument in tenuous and cold streaming plasmas [1]. Double-probe electric field sensors are often deployed using wire booms with radii much less than typical Debye lengths of magnetospheric plasmas (millimeters compared to tens of meters). However, in tenuous and cold streaming plasmas seen in the polar cap and lobe regions, the wire booms have a high positive potential due to photoelectron emission and can strongly scatter approaching ions. Consequently, an electrostatic wake formed behind the spacecraft is further enhanced by the presence of the wire booms. We reproduce this process for the case of the Cluster satellite by performing plasma particle-in-cell (PIC) simulations [2], which include the effects of both the spacecraft body and the wire booms in a simultaneous manner, on modern supercomputers. The simulations reveal that the effective thickness of the booms for the Cluster Electric Field and Wave (EFW) instrument is magnified from its real thickness (2.2 millimeters) to several meters, when the spacecraft potential is at 30-40 volts. Such booms enhance the wake electric field magnitude by a factor of about 2 depending on the spacecraft potential, and play a principal role in explaining the in situ Cluster EFW data showing sinusoidal spurious electric fields of about 10 mV/m amplitudes. The boom effects are quantified by comparing PIC simulations with and without wire booms. The

  16. Application Of Recent (2008-2013) Lunar Probe Instrumentation To The Exploration For Precambrian Protolife In Volcanic Vents

    Science.gov (United States)

    Green, Jack

    2009-12-01

    Selected recent and future lunar probes have instruments suitable for the exploration of Precambrian protolife. Fumaroles contain the ingredients for protolife. With available energy including flow charging and charge separation, amino acids and related compounds could evolve into ATP. Fischer-Tropsch reactions in hydrothermal clay could create lipid micelles as reaction chambers. Fumarolic polyphosphates and tungsten catalysts could contribute to precambrian protolife evolution . The floors of Alphonsus and Lavoisier M exhibit dark mounds which could be buried fumaroles at fracture intersections. Chang'e-1 could define regolith thickness at these mounds with microwave radiometry. The MoonLITE penetrometer could likely identify hydrothermal products in these mounds using X-ray fluorescence spectrometry. Regarding polar craters which may host volcanic ices, intermittent illumination of selected crater floors warmed to 220 K may create a transient tenuous atmosphere of COS, H2S, CO2, CO, HCl and CH4 which could be analyzed by near infrared spectrometry (NIMS) of SELENE or Chandrayaan-1. Prior to the 2009 impact of a polar crater by LCROSS (of the LRO mission), the Soviet LEND mission may detect water using epithermal neutrons. The impact plume proposed in the LCROSS mission at a polar crater could be analyzed by NIMS for fumarolic fluids similar the the NIMS analyses of Callisto and Ganymede moons of Jupiter. The possible identification of cyanogen in the LCROSS impact plume would support the CN2 spectrogram at Aristarchus by Kozyrev in 1969. In the Aristarchus region, lunar dawn during periods of maximum orbital flexing may accentuate release of Rn, Ar and protolife gases. These gases could possibly by identified by the Chang'e-1 gamma/x ray spectrometer, NIMS and the neutral mass spectrometer of the LADEE mission. Microwave spectrometry and radar on the LEO mission as well as LROC (LRO mission) could also be directed at verified lunar transient sites.

  17. Minimally invasive surgical instruments with an accessory channel capable of integrating fibre-optic cable for optical biopsy: a review of the state of the art.

    Science.gov (United States)

    Jelínek, Filip; Arkenbout, Ewout A; Sakes, Aimée; Breedveld, Paul

    2014-08-01

    This review article provides a comprehensive overview and classification of minimally invasive surgical instruments with an accessory channel incorporating fibreoptics or another auxiliary device for various purposes. More specifically, this review was performed with the focus on the newly emerging field of optical biopsy, its objective being to discuss primarily the instruments capable of carrying out the optical biopsy and subsequent tissue resection. Instruments housing the fibreoptics for other uses, as well as instruments with an accessory channel capable of housing the fibreoptics instead of their original auxiliary device after relevant design modifications, supplement the review. The entire Espacenet and Scopus databases were searched, yielding numerous patents and articles on conceptual and existing instruments satisfying the criteria. The instruments were categorised based on the function the fibreoptics or the auxiliary device serves. On the basis of their geometrical placement with respect to the tissue resector or manipulator, the subcategories were further defined. This subdivision was used to identify the feasibility of performing the optical biopsy and the tissue resection in an accurate and successive fashion. In general, the existing concepts or instruments are regarded as limited with regard to such a functionality, either due to the placement of their accessory channel with or without the fibreoptics or due to the operational restrictions of their tissue manipulators. A novel opto-mechanical biopsy harvester, currently under development at Delft University of Technology, is suggested as a promising alternative, ensuring a fast and accurate succession of the optical and the mechanical biopsies of a flat superficial tissue. © IMechE 2014.

  18. The importance of clinical semiotics and instrumental investigations in the diagnosis and surgical treatment of osteoid osteoma. A report of 6 cases.

    Science.gov (United States)

    Carfagni, A; Moreschini, O; Billi, A

    1990-03-01

    The authors emphasize the importance of a complete examination, including history, symptomatology and instrumental tests in the diagnosis of osteoid osteoma (O.O.). This lesion is often difficult to diagnose, particularly at unusual sites. However, by the use of accurate radiography, stratigraphy, bone scan and CAT, a pre-operative accurate diagnosis is usually possible. The authors emphasize the importance of the least invasive surgical approach and the complete removal of the lesion with generous curettage. This is not always easy, as illustrated in the present study, which includes atypical sites, sometimes in delicate anatomical situations. They also illustrate a particular method used for removal.

  19. Evaluation of diabetic foot osteomyelitis using probe to bone test and magnetic resonance imaging and their impact on surgical intervention

    Directory of Open Access Journals (Sweden)

    Fatma Zaiton

    2014-09-01

    Conclusion: PTB test is a simple, minimally invasive, low cost test and can be done at outpatient clinic. Its sensitivity and specificity are good when compared to those of MRI, but when we need to diagnose associated soft tissue infection and planning the surgical management MRI was the image of choice.

  20. Antibacterial effects of silver-coafed surgical instruments%新型表面镀银手术器械抗菌性能研究

    Institute of Scientific and Technical Information of China (English)

    刘蕊; 沈蕾; 栗茜; 胡文艳; 李石宝; 杨聚才; 魏建华

    2011-01-01

    AIM; To evaluate the antibacterial effects of silver-coafed surgical instruments. METHODS;Enghty sets of surgical instruments were divided into silver-coafed and conventional groups (re =40). The surfaces of instruments in silver-coafed group were coated with silver according to standard protocols. The surfaces in conventional group received no treatments. After sterilization, the instruments were exposed to different surgical environments and bacterial contamination of the instrument surfaces in the two groups were observed and compared. The sterilized status of the two groups in different preservation environments was also inspected. RESULTS: No bacterial contamination was observed in both groups after 4 h exposure in laminar flow operation room. While after 8h exposure, the contamination rate of control group was 30% , which was significantly higher than the 10% of the silver-coafed group. The rate of contamination in control group was significantly high than that of the silver-coafed group when exposed to natural environment for 4 h and 8 h ( P <0.05). The sterilization status of the silver-coafed instruments was significantly longer than that of the control group. CONCLUSION: The silver-coafed surgical instruments show significant antibacterial effects.%目的:观察表面镀银手术器械抗菌性能.方法:选择80份相同的手术器械,随机分为镀银器械组和常规器械组(每组40份),镀银器械组手术器械表面按照标准镀银,制成表面含银手术器械;常规器械组手术器械表面则不作任何处理.两组均采用高压蒸汽消毒法灭菌后,分别置于洁净手术间和野战帐篷的不同环境中,比较两组器械在空气中暴露不同时间后的细菌检出率,以及无菌包装状态下保存时间的差异.结果:灭菌后在洁净手术间暴露状态下4h后两组均未检出细菌,8h后常规器械组细菌检出率30%,镀银器械组细菌检出率10%;野战帐篷空气

  1. Analysis of solids, liquids, and biological tissues using solids probe introduction at atmospheric pressure on commercial LC/MS instruments.

    Science.gov (United States)

    McEwen, Charles N; McKay, Richard G; Larsen, Barbara S

    2005-12-01

    Direct analysis of samples using atmospheric pressure ionization (API) provides a more rapid method for analysis of volatile and semivolatile compounds than vacuum solids probe methods and can be accomplished on commercial API mass spectrometers. With only a simple modification to either an electrospray (ESI) or atmospheric pressure chemical ionization (APCI) source, solid as well as liquid samples can be analyzed in seconds. The method acts as a fast solids/liquid probe introduction as well as an alternative to the new direct analysis in real time (DART) and desorption electrospray ionization (DESI) methods for many compound types. Vaporization of materials occurs in the hot nitrogen gas stream flowing from an ESI or APCI probe. Ionization of the thermally induced vapors occurs by corona discharge under standard APCI conditions. Accurate mass and mass-selected fragmentation are demonstrated as is the ability to obtain ions from biological tissue, currency, and other objects placed in the path of the hot nitrogen stream.

  2. Piezoelectric device vs. conventional rotative instruments in impacted third molar surgery: relationships between surgical difficulty and postoperative pain with histological evaluations.

    Science.gov (United States)

    Rullo, Rosario; Addabbo, Francesco; Papaccio, Giampaolo; D'Aquino, Riccardo; Festa, Vincenzo Maria

    2013-03-01

    To investigate and compare the influence of surgical difficulty on postoperative pain after treatment of impacted mandibular third molars by rotatory osteotomy or Piezoelectric surgery. A prospective, randomized, split-mouth study was performed of 52 patients with bilateral and symmetrically oriented impacted mandibular third molars, who were surgically treated using a burr (Group A) on one random side of the lower jaw and a Piezoelectric device (Group B) on the contralateral side. Surgical difficulty was evaluated using a modified version of the Parant scale to categorize "simple extractions" and "complex extractions". Primary outcome parameters were the comparison of the postoperative pain evaluation rated on the Visual Analogue Scale from day 0 to day 6 postsurgery, and the assessment of differences in surgery time between the groups. Bone biopsies were taken during surgery to assess differences in bone tissue damage levels between the two different techniques. In "complex extractions" lower pain evaluation and significantly shorter surgery times were recorded when rotatory instruments were used. In "simple extractions", similar surgery times were observed for both techniques, but pain was greatest on the day of surgery when the burr was used. Bone heat osteonecrosis was observed only in the rotatory group and a high level of alkaline phosphatase was noted only in the Piezoelectric group. Pain after extraction of a mandibular third molar increases with increased surgical difficulty and especially in longer interventions. The integrity of the bony structure observed after the ultrasonic technique may favour the bone healing process. Copyright © 2012 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  3. 医用手术吻(缝)合器的发展及术中应用%Research on development and surgical application of surgical stapling and stitching instrument

    Institute of Scientific and Technical Information of China (English)

    常林凤; 刘宝林

    2014-01-01

    There was almost one hundred years since surgical stapler invention to now. Using stapler (stitching instrument) in surgery has many advantages, such as stitching fast, easy to operating, few side effects and complications. It makes tumor excision surgery can’t be cut focus in past possible and improving the curative effect of the surgery. Surgical staplers also give difficult surgery and new technology strong supports. In the last ten years, for cheap price and rapid development of the technology level, domestic staplers’ market share is increasing year by year and breaking the foreign monopoly product. In open surgery, domestic stapler has progressively more than foreign brands. In endoscopy surgery, domestic staplers also have a place. In current, surgical staplers are used more and more popular in the domestic tertiary medical institutions and becoming indispensable tools in many surgeries. Surgical staplers (stitching instrument) are broadly used in esophageal reconstruction, gastrointestinal tract reconstruction, endoscopic surgery in pulmonary bulla resection, uterus resection, pancreas resection, duodenum resection%医用吻(缝)合器具有缝合快速、操作简便、副作用小及术后并发症少等优点,使得以往无法切除的肿瘤手术得以病灶切除,提高了手术的疗效,为高难度手术和新技术的开展提供了有力支撑。近年来,国产医用手术缝(吻)合器以其低廉的价格和快速发展的工艺技术水平在市场占有率上逐年提高,在开放式手术的应用中已逐步超过国外品牌,在腔镜手术中,国产吻合器也争得一席之地。目前,吻(缝)合器在国内三级医疗机构中应用逐渐普及,广泛应用于食管、胃肠道重建,在内镜手术中完成肺大泡切除、脾脏、子宫、胰腺及十二指肠等部位手术。

  4. Combined anterior lumbar interbody fusion and instrumented posterolateral fusion for degenerative lumbar scoliosis: indication and surgical outcomes

    OpenAIRE

    Hsieh, Ming-Kai; Chen, Lih-Huei; Niu, Chi-Chien; Fu, Tsai-Sheng; Lai, Po-Liang; Chen, Wen-Jer

    2015-01-01

    Background Traditional approaches to deformity correction of degenerative lumbar scoliosis include anterior-posterior approaches and posterior-only approaches. Most patients are treated with posterior-only approaches because the high complication rate of anterior approach. Our purpose is to compare and assess outcomes of combined anterior lumbar interbody fusion and instrumented posterolateral fusion with posterior alone approach for degenerative lumbar scoliosis with spinal stenosis. Methods...

  5. Effect of fine management in sterilization of surgical instruments in disinfection supply center%精细化管理在消毒供应中心手术器械消毒灭菌中的应用

    Institute of Scientific and Technical Information of China (English)

    李翠娟

    2016-01-01

    目的:探讨精细化管理在消毒供应中心手术器械消毒灭菌中的应用效果。方法在1856包手术器械消毒灭菌中引入精细化管理理念。了解手术器械消毒灭菌合格率和手术室人员使用满意度。结果1856包手术器械灭菌合格率为100.0%,手术室人员满意度为99.7%。结论运用精细化管理加强对消毒供应中心手术器械的质量管理能有效提高器械灭菌的合格率,提高手术人员的满意度。%Objective To investigate the effect of fine management in disinfection and sterilization of surgical instruments in Disinfection Supply Center. Method The surgical instrument sterilization and disinfection pass rate differences and operating room personnel satisfaction were investigated. Result The pass rate of disinfection and sterilization in surgical instruments of observation group was 100.0%, the surgeon satisfaction in using surgical instruments was 99.7%. Conclusion Application of fine management in sterilization of surgical instruments in disinfection supply center can improve the passing rate of the sterilization, improve the satisfaction of the surgical staff, and also to ensure the quality of the surgical instrument in sterilization, reduce the risk of infection in patients, protect patient safety, which is worth further clinical application.

  6. Repeat surgical interventions following "definitive" instrumentation and fusion for idiopathic scoliosis: five-year update on a previously published cohort.

    Science.gov (United States)

    Ramo, Brandon A; Richards, B Stephens

    2012-06-15

    A retrospective case series. To identify the overall reoperation rate and factors contributing to reoperation in a recent 5-year cohort of patients (2003-2007) undergoing spinal deformity surgery. These patients were compared with a previously published 15-year cohort of consecutive patients (1988-2002) from the same institution to assess for any significant differences in reoperation rates. In a previously published report from this institution, the reoperation rate for patients with idiopathic scoliosis treated during a 15-year period (1988-2002) was 12.9%. That group was predominantly treated with first-generation TSRH (Medtronic, Memphis, TN) implants and CD implants. Lower profile, more rigid implant systems are now used along with refined techniques for correction of scoliosis deformity. We hypothesized that these factors would lead to lower rates of reoperation. METHODS.: The medical records of 452 consecutive patients (older than 9 yr) surgically treated for idiopathic scoliosis at one institution during 5 years (2003-2007) were reviewed to identify those who required reoperation. The reoperation rate for this cohort was 7.5% (34 of 452 patients). Compared with the prior cohort, significant decreases were noted with regard to total reoperation rate as well as reoperation due to infection and pseudarthrosis. Trends were noted toward decreased rates of reoperation due to prominent implants, dislodged implants, and implant proximity to vital structures. Within the newer cohort, a trend toward decreased reoperation rate was also noted for lower profile implant systems compared with first-generation TSRH implants. With the evolution of newer lower profile segmental implant systems that provide more rigid fixation and with the advancements in techniques for deformity correction, the repeat surgical intervention rate for idiopathic scoliosis has decreased.

  7. Probe into Instrument System of SCR Denitration Installation%SCR脱硝装置仪表系统探讨

    Institute of Scientific and Technical Information of China (English)

    周必华; 赵发生

    2015-01-01

    The paper presents the simple lfow and instrument system of SCR denitration instal ation, expatiates the key instrument instalation and the attention matters of type selection in SCR denitration instalation. They provide the use for refer-ence and learning role for the type selection of SCR denitration instalation.%介绍了SCR脱硝装置的简单流程及仪表系统,阐述了SCR脱硝装置中重要的仪表设备及选型注意事项,对SCR脱硝装置仪表的选型有一定的借鉴和参考作用。

  8. Analysis of the learning curve for transurethral resection of the prostate. Is there any influence of musical instrument and video game skills on surgical performance?

    Science.gov (United States)

    Yamaçake, Kleiton Gabriel Ribeiro; Nakano, Elcio Tadashi; Soares, Iva Barbosa; Cordeiro, Paulo; Srougi, Miguel; Antunes, Alberto Azoubel

    2015-09-01

    To evaluate the learning curve for transurethral resection of the prostate (TURP) among urology residents and study the impact of video game and musical instrument playing abilities on its performance. A prospective study was performed from July 2009 to January 2013 with patients submitted to TURP for benign prostatic hyperplasia. Fourteen residents operated on 324 patients. The following parameters were analyzed: age, prostate-specific antigen levels, prostate weight on ultrasound, pre- and postoperative serum sodium and hemoglobin levels, weight of resected tissue, operation time, speed of resection, and incidence of capsular lesions. Gender, handedness, and prior musical instrument and video game playing experience were recorded using survey responses. The mean resection speed in the first 10 procedures was 0.36 g/min and reached a mean of 0.51 g/min after the 20(th) procedure. The incidence of capsular lesions decreased progressively. The operation time decreased progressively for each subgroup regardless of the difference in the weight of tissue resected. Those experienced in playing video games presented superior resection speed (0.45 g/min) when compared with the novice (0.35 g/min) and intermediate (0.38 g/min) groups (p=0.112). Musical instrument playing abilities did not affect the surgical performance. Speed of resection, weight of resected tissue, and percentage of resected tissue improve significantly and the incidence of capsular lesions reduces after the performance of 10 TURP procedures. Experience in playing video games or musical instruments does not have a significant effect on outcomes.

  9. Rapid Genotyping of the Human Renin (REN Gene by the LightCycler® Instrument: Identification of Unexpected Nucleotide Substitutions within the Selected Hybridization Probe Area

    Directory of Open Access Journals (Sweden)

    Line Wee

    2010-01-01

    Full Text Available Preeclampsia is a serious disorder affecting nearly 3% of all in the Western world. It is associated with hypertension and proteinuria, and several lines of evidence suggest that the renin-angiotensin system (RAS may be involved in the development of hypertension at different stages of a preeclamptic pregnancy. In this study, we developed rapid genotyping assays on the LightCycler® instrument to allow the detection of genetic variants in the renin gene (REN that may predispose to preeclampsia. The method is based on real-time PCR and allele-specific hybridization probes, followed by fluorescent melting curve analysis to expose a change in melting temperature (Tm. Ninety-two mother-father-child triads (n=276 from preeclamptic pregnancies were genotyped for three haplotype-tagging single nucleotide polymorphisms (htSNPs in REN. All three htSNPs (rs5705, rs1464816 and rs3795575 were successfully genotyped. Furthermore, two unexpected nucleotide substitutions (rs11571084 and rs61757041 were identified within the selected hybridization probe area of rs1464816 and rs3795575 due to aberrant melting peaks. In conclusion, genotyping on the LightCycler® instrument proved to be rapid and highly reproducible. The ability to uncover additional nucleotide substitutions is particularly important in that it allows the identification of potentially etiological variants that might otherwise be overlooked by other genotyping methods.

  10. Using the cold plasma dispersion relation and whistler mode waves to quantify the antenna sheath impedance of the Van Allen Probes EFW instrument

    Science.gov (United States)

    Hartley, D. P.; Kletzing, C. A.; Kurth, W. S.; Bounds, S. R.; Averkamp, T. F.; Hospodarsky, G. B.; Wygant, J. R.; Bonnell, J. W.; Santolík, O.; Watt, C. E. J.

    2016-05-01

    Cold plasma theory and parallel wave propagation are often assumed when approximating the whistler mode magnetic field wave power from electric field observations. The current study is the first to include the wave normal angle from the Electric and Magnetic Field Instrument Suite and Integrated Science package on board the Van Allen Probes in the conversion factor, thus allowing for the accuracy of these assumptions to be quantified. Results indicate that removing the assumption of parallel propagation does not significantly affect calculated plasmaspheric hiss wave powers. Hence, the assumption of parallel propagation is valid. For chorus waves, inclusion of the wave normal angle in the conversion factor leads to significant alterations in the distribution of wave power ratios (observed/ calculated); the percentage of overestimates decreases, the percentage of underestimates increases, and the spread of values is significantly reduced. Calculated plasmaspheric hiss wave powers are, on average, a good estimate of those observed, whereas calculated chorus wave powers are persistently and systematically underestimated. Investigation of wave power ratios (observed/calculated), as a function of frequency and plasma density, reveals a structure consistent with signal attenuation via the formation of a plasma sheath around the Electric Field and Waves spherical double probes instrument. A simple, density-dependent model is developed in order to quantify this effect of variable impedance between the electric field antenna and the plasma interface. This sheath impedance model is then demonstrated to be successful in significantly improving agreement between calculated and observed power spectra and wave powers.

  11. Development of an Educational Game to Set Up Surgical Instruments on the Mayo Stand or Back Table: Applied Research in Production Technology.

    Science.gov (United States)

    Paim, Crislaine Pires Padilha; Goldmeier, Silvia

    2017-01-10

    Existing research suggests that digital games can be used effectively for educational purposes at any level of training. Perioperative nursing educators can use games to complement curricula, in guidance and staff development programs, to foster team collaboration, and to give support to critical thinking in nursing practice because it is a complex environment. To describe the process of developing an educational game to set up surgical instruments on the Mayo stand or back table as a resource to assist the instructor in surgical instrumentation training for students and nursing health professionals in continued education. The study was characterized by applied research in production technology. It included the phases of analysis and design, development, and evaluation. The objectives of the educational game were developed through Bloom's taxonomy. Parallel to the physical development of the educational game, a proposed model for the use of digital elements in educational game activities was applied to develop the game content. The development of the game called "Playing with Tweezers" was carried out in 3 phases and was evaluated by 15 participants, comprising students and professional experts in various areas of knowledge such as nursing, information technology, and education. An environment was created with an initial screen, menu buttons containing the rules of the game, and virtual tour modes for learning and assessment. The "digital" nursing student needs engagement, stimulation, reality, and entertainment, not just readings. "Playing with Tweezers" is an example of educational gaming as an innovative teaching strategy in nursing that encourages the strategy of involving the use of educational games to support theoretical or practical classroom teaching. Thus, the teacher does not work with only 1 type of teaching methodology, but with a combination of different methodologies. In addition, we cannot forget that skill training in an educational game does not

  12. Development of an Educational Game to Set Up Surgical Instruments on the Mayo Stand or Back Table: Applied Research in Production Technology

    Science.gov (United States)

    2017-01-01

    Background Existing research suggests that digital games can be used effectively for educational purposes at any level of training. Perioperative nursing educators can use games to complement curricula, in guidance and staff development programs, to foster team collaboration, and to give support to critical thinking in nursing practice because it is a complex environment. Objective To describe the process of developing an educational game to set up surgical instruments on the Mayo stand or back table as a resource to assist the instructor in surgical instrumentation training for students and nursing health professionals in continued education. Methods The study was characterized by applied research in production technology. It included the phases of analysis and design, development, and evaluation. The objectives of the educational game were developed through Bloom’s taxonomy. Parallel to the physical development of the educational game, a proposed model for the use of digital elements in educational game activities was applied to develop the game content. Results The development of the game called “Playing with Tweezers” was carried out in 3 phases and was evaluated by 15 participants, comprising students and professional experts in various areas of knowledge such as nursing, information technology, and education. An environment was created with an initial screen, menu buttons containing the rules of the game, and virtual tour modes for learning and assessment. Conclusions The “digital” nursing student needs engagement, stimulation, reality, and entertainment, not just readings. “Playing with Tweezers” is an example of educational gaming as an innovative teaching strategy in nursing that encourages the strategy of involving the use of educational games to support theoretical or practical classroom teaching. Thus, the teacher does not work with only 1 type of teaching methodology, but with a combination of different methodologies. In addition, we

  13. Cleaning quality of loaner surgical instruments in orthopaedic department%骨科外来手术器械清洗质量观察

    Institute of Scientific and Technical Information of China (English)

    陆蕾; 黄明芬; 高玲花

    2012-01-01

    目的 有效控制骨科外来手术器械的清洗消毒质量,保证手术患者的医疗安全.方法 将外院送人医院的已清洗灭菌但未使用的器械64件设为对照组,随机抽取已使用的外来器械186件,分成手工清洗组(观察1组)、机械清洗组(观察2组)和预处理十机械清洗十人工检查干预组(观察3组),清洗后用10倍放大镜目测加隐血试验检查清洗质量.结果 4组器械的放大镜目测不合格率分别为18.46%、25.81%、20.97%、1.61%,差异有统计学意义(P<0.01);隐血试验阳性率分别为13.85%、16.13%、11.29%、0,差异有统计学意义(P<0.05).结论 骨科外来手术器械的清洗质量不容乐观,必须加强外来器械的管理,通过规范清洗消毒流程及加强质量控制以保证外来器械的清洗质量,从而保障手术患者的医疗安全.%OBJECTIVE To effectively control cleaning and disinfection quality of loaner surgical instruments in orthopaedic department so as to ensure the medical safety of the patients. METHODS Totally 64 pieces of submitted instruments which have been cleaned and sterilized were selected as the control group, and 186 pieces of loaner instruments were randomly selected and divided into the manual cleaning group (observation group 1), mechanical cleaning group (observation group 2), and pre-disposal plus mechanical cleaning plus manual intervention (observation group 3), the cleaning quality of the instruments was examined by ten times magnifier plus occult blood test. RESULTS The unqualified rates of the cleaning quality of the four groups of instruments measured by the magnifier were 18. 46%, 25, 81%, 20. 97% and 1. 61%, respectively, the difference was statically significant (P<0. 01) , while the positive rates of the cleaning quality measured by occult blood test were 13.85% ,16. 13% ,11. 29% and 0, the difference was statistically significant (P<0. 05). CONCLUSION The current status of the cleaning quality of

  14. 外来手术器械使用后规范化处理探讨%Standardized treatment of foreign surgical instruments

    Institute of Scientific and Technical Information of China (English)

    杨风; 赵自云; 杨杰书; 李璟; 江楠

    2015-01-01

    OBJECTIVE To improve the conventional treatment mode of the foreign surgical instruments that are frequently communicate among the hospitals so as to raise the effectiveness of the cleaning ,disinfection ,and steri‐lization of the instruments .METHODS A total of 300 foreign surgical instruments were randomly selected from Jan 2012 to Oct 2012 ,then 150 instruments were rinsed with running water and submitted to the central sterile supply department ,which were assigned as the control group ,while ,150 surgical instruments were preserved for a long period of time and cleaned and disinfected after the surgery ,which were set as the experimental group .The cleaning effect was observed and compared between the two groups ,and the statistical analysis of data was per‐formed with the use of SPSS 13 .0 software .RESULTS The detection rate of bacteria of the control group was 32 .00% before the cleaning ,higher than 6 .00% after the cleaning ;the positive rate of HBSAg of the control group was 7 .33% before the cleaning ,higher than 0 .67% after the cleaning ;the positive rate of occult blood of the control group was 43 .33% before the cleaning ,higher than 6 .67% after the cleaning .The detection rate of bacteria of the experimental group was 6 .67% before the cleaning ,higher than 1 .33% after the cleaning ;the pos‐itive rate of HBSAg of the experimental group was 1 .33% befoe the cleaning ,higher than 0 after the cleaning ;the positive rate of occult blood of the experimental group was 5 .33% before the cleaning ,higher than 2 .00% after the cleaning .The detection rate of bacteria and the positive rate of occult blood of the experimental group were lower than those of the control group , and the experimental group was superior to the control group . CONCLUSION The establishment of the standardized process management of the foreign instruments may ensure the quality of foreign surgical instruments ,improve the surgical safety and effectiveness ,and offer the

  15. Combining 3D tracking and surgical instrumentation to determine the stiffness of spinal motion segments: a validation study.

    Science.gov (United States)

    Reutlinger, C; Gédet, P; Büchler, P; Kowal, J; Rudolph, T; Burger, J; Scheffler, K; Hasler, C

    2011-04-01

    The spine is a complex structure that provides motion in three directions: flexion and extension, lateral bending and axial rotation. So far, the investigation of the mechanical and kinematic behavior of the basic unit of the spine, a motion segment, is predominantly a domain of in vitro experiments on spinal loading simulators. Most existing approaches to measure spinal stiffness intraoperatively in an in vivo environment use a distractor. However, these concepts usually assume a planar loading and motion. The objective of our study was to develop and validate an apparatus, that allows to perform intraoperative in vivo measurements to determine both the applied force and the resulting motion in three dimensional space. The proposed setup combines force measurement with an instrumented distractor and motion tracking with an optoelectronic system. As the orientation of the applied force and the three dimensional motion is known, not only force-displacement, but also moment-angle relations could be determined. The validation was performed using three cadaveric lumbar ovine spines. The lateral bending stiffness of two motion segments per specimen was determined with the proposed concept and compared with the stiffness acquired on a spinal loading simulator which was considered to be gold standard. The mean values of the stiffness computed with the proposed concept were within a range of ±15% compared to data obtained with the spinal loading simulator under applied loads of less than 5 Nm.

  16. Solar Wind Electrons Alphas and Protons (SWEAP) Investigation: Design of the Solar Wind and Coronal Plasma Instrument Suite for Solar Probe Plus

    Science.gov (United States)

    Kasper, Justin C.; Abiad, Robert; Austin, Gerry; Balat-Pichelin, Marianne; Bale, Stuart D.; Belcher, John W.; Berg, Peter; Bergner, Henry; Berthomier, Matthieu; Bookbinder, Jay; Brodu, Etienne; Caldwell, David; Case, Anthony W.; Chandran, Benjamin D. G.; Cheimets, Peter; Cirtain, Jonathan W.; Cranmer, Steven R.; Curtis, David W.; Daigneau, Peter; Dalton, Greg; Dasgupta, Brahmananda; DeTomaso, David; Diaz-Aguado, Millan; Djordjevic, Blagoje; Donaskowski, Bill; Effinger, Michael; Florinski, Vladimir; Fox, Nichola; Freeman, Mark; Gallagher, Dennis; Gary, S. Peter; Gauron, Tom; Gates, Richard; Goldstein, Melvin; Golub, Leon; Gordon, Dorothy A.; Gurnee, Reid; Guth, Giora; Halekas, Jasper; Hatch, Ken; Heerikuisen, Jacob; Ho, George; Hu, Qiang; Johnson, Greg; Jordan, Steven P.; Korreck, Kelly E.; Larson, Davin; Lazarus, Alan J.; Li, Gang; Livi, Roberto; Ludlam, Michael; Maksimovic, Milan; McFadden, James P.; Marchant, William; Maruca, Bennet A.; McComas, David J.; Messina, Luciana; Mercer, Tony; Park, Sang; Peddie, Andrew M.; Pogorelov, Nikolai; Reinhart, Matthew J.; Richardson, John D.; Robinson, Miles; Rosen, Irene; Skoug, Ruth M.; Slagle, Amanda; Steinberg, John T.; Stevens, Michael L.; Szabo, Adam; Taylor, Ellen R.; Tiu, Chris; Turin, Paul; Velli, Marco; Webb, Gary; Whittlesey, Phyllis; Wright, Ken; Wu, S. T.; Zank, Gary

    2016-12-01

    The Solar Wind Electrons Alphas and Protons (SWEAP) Investigation on Solar Probe Plus is a four sensor instrument suite that provides complete measurements of the electrons and ionized helium and hydrogen that constitute the bulk of solar wind and coronal plasma. SWEAP consists of the Solar Probe Cup (SPC) and the Solar Probe Analyzers (SPAN). SPC is a Faraday Cup that looks directly at the Sun and measures ion and electron fluxes and flow angles as a function of energy. SPAN consists of an ion and electron electrostatic analyzer (ESA) on the ram side of SPP (SPAN-A) and an electron ESA on the anti-ram side (SPAN-B). The SPAN-A ion ESA has a time of flight section that enables it to sort particles by their mass/charge ratio, permitting differentiation of ion species. SPAN-A and -B are rotated relative to one another so their broad fields of view combine like the seams on a baseball to view the entire sky except for the region obscured by the heat shield and covered by SPC. Observations by SPC and SPAN produce the combined field of view and measurement capabilities required to fulfill the science objectives of SWEAP and Solar Probe Plus. SWEAP measurements, in concert with magnetic and electric fields, energetic particles, and white light contextual imaging will enable discovery and understanding of solar wind acceleration and formation, coronal and solar wind heating, and particle acceleration in the inner heliosphere of the solar system. SPC and SPAN are managed by the SWEAP Electronics Module (SWEM), which distributes power, formats onboard data products, and serves as a single electrical interface to the spacecraft. SWEAP data products include ion and electron velocity distribution functions with high energy and angular resolution. Full resolution data are stored within the SWEM, enabling high resolution observations of structures such as shocks, reconnection events, and other transient structures to be selected for download after the fact. This paper describes

  17. Evaluating levels and health risk of heavy metals in exposed workers from surgical instrument manufacturing industries of Sialkot, Pakistan.

    Science.gov (United States)

    Junaid, Muhammad; Hashmi, Muhammad Zaffar; Malik, Riffat Naseem

    2016-09-01

    The study aimed to monitor heavy metal (chromium, Cr; cadmium, Cd; nickel, Ni; copper, Cu; lead, Pb; iron, Fe; manganese, Mn; and zinc, Zn) footprints in biological matrices (urine, whole blood, saliva, and hair), as well as in indoor industrial dust samples, and their toxic effects on oxidative stress and health risks in exposed workers. Overall, blood, urine, and saliva samples exhibited significantly higher concentrations of toxic metals in exposed workers (Cr; blood 16.30 μg/L, urine 58.15 μg/L, saliva 5.28 μg/L) than the control samples (Cr; blood 5.48 μg/L, urine 4.47 μg/L, saliva 2.46 μg/L). Indoor industrial dust samples also reported to have elevated heavy metal concentrations, as an example, Cr quantified with concentration of 299 mg/kg of dust, i.e., more than twice the level of Cr in household dust (136 mg/kg). Superoxide dismutase (SOD) level presented significant positive correlation (p ≤ 0.01) with Cr, Zn, and Cd (Cr > Zn > Cd) which is an indication of heavy metal's associated raised oxidative stress in exposed workers. Elevated average daily intake (ADI) of heavy metals resulted in cumulative hazard quotient (HQ) range of 2.97-18.88 in workers of different surgical units; this is an alarming situation of health risk implications. Principal component analysis-multiple linear regression (PCA-MLR)-based pie charts represent that polishing and cutting sections exhibited highest metal inputs to the biological and environmental matrices than other sources. Heavy metal concentrations in biological matrices and dust samples showed a significant positive correlation between Cr in dust, urine, and saliva samples. Current study will help to generate comprehensive base line data of heavy metal status in biomatrices and dust from scientifically ignored industrial sector. Our findings can play vital role for health departments and industrial environmental management system (EMS) authorities in policy making and implementation.

  18. Accuracy of a direct drill-guiding system with minimal tolerance of surgical instruments used for implant surgery: a prospective clinical study

    Science.gov (United States)

    2016-01-01

    PURPOSE A recently introduced direct drill-guiding implant surgery system features minimal tolerance of surgical instruments in the metal sleeve by using shank-modified drills and a sleeve-incorporated stereolithographic guide template. The purpose of this study was to evaluate the accuracy of this new guided surgery system in partially edentulous patients using geometric analyses. MATERIALS AND METHODS For the study, 21 implants were placed in 11 consecutive patients using the direct drill-guiding implant surgery system. The stereolithographic surgical guide was fabricated using cone-beam computed tomography, digital scanning, computer-aided design and computer-assisted manufacturing, and additive manufacturing processes. After surgery, the positional and angular deviations between planned and placed implants were measured at the abutment level using implant-planning software. The Kruskal-Wallis test and Mann-Whitney U test were used to compare the deviations (α=.05). RESULTS The mean horizontal deviations were 0.593 mm (SD 0.238) mesiodistally and 0.691 mm (SD 0.344) buccolingually. The mean vertical deviation was 0.925 mm (SD 0.376) occlusogingivally. The vertical deviation was significantly larger than the horizontal deviation (P=.018). The mean angular deviation was 2.024 degrees (SD 0.942) mesiodistally and 2.390 degrees (SD 1.142) buccolingually. CONCLUSION The direct drill-guiding implant surgery system demonstrates high accuracy in placing implants. Use of the drill shank as the guiding component is an effective way for reducing tolerance. PMID:27350855

  19. The Digital Fields Board for the FIELDS instrument suite on the Solar Probe Plus mission: Analog and digital signal processing

    Science.gov (United States)

    Malaspina, David M.; Ergun, Robert E.; Bolton, Mary; Kien, Mark; Summers, David; Stevens, Ken; Yehle, Alan; Karlsson, Magnus; Hoxie, Vaughn C.; Bale, Stuart D.; Goetz, Keith

    2016-06-01

    The first in situ measurements of electric and magnetic fields in the near-Sun environment (Solar Probe Plus mission. The Digital Fields Board (DFB) is an electronics board within FIELDS that performs analog and digital signal processing, as well as digitization, for signals between DC and 60 kHz from five voltage sensors and four search coil magnetometer channels. These nine input signals are processed on the DFB into 26 analog data streams. A specialized application-specific integrated circuit performs analog to digital conversion on all 26 analog channels simultaneously. The DFB then processes the digital data using a field programmable gate array (FPGA), generating a variety of data products, including digitally filtered continuous waveforms, high-rate burst capture waveforms, power spectra, cross spectra, band-pass filter data, and several ancillary products. While the data products are optimized for encounter-based mission operations, they are also highly configurable, a key design aspect for a mission of exploration. This paper describes the analog and digital signal processing used to ensure that the DFB produces high-quality science data, using minimal resources, in the challenging near-Sun environment.

  20. Theoretical and Instrumental Studies of the Competitive Interaction Between Aromatic α-Aminobisphosphonates with DNA Using Binding Probes.

    Science.gov (United States)

    Gholivand, M B; Peyman, H; Gholivand, Kh; Roshanfekr, H; Taherpour, A A; Yaghobi, R

    2017-07-01

    Fluorescence spectroscopy, UV-visible absorption spectroscopy, circular dichroism (CD) spectroscopy, viscometry, cyclic voltammetry (CV), and differential pulse voltammetry (DPV) were applied to investigate the competitive interaction of DNA with two aromatic α-aminobisphosphonates and neutral red dye (NR, intercalator) and Hoechst (Ho, groove binder) as spectroscopic probes, in a Tris-hydrogen chloride buffer solution (pH 7.4). The principal component analysis (PCA) was applied to determine the number of chemical components presented in complexation equilibrium of DNA with the aromatic α-aminobisphosphonates (B1 and B2). The spectroscopic and voltammetric studies showed that the groove binding mode of interaction is predominant in the solution containing DNA and α-aminobisphosphonates. Furthermore, the results indicated that α-aminobisphosphonate with the lengthy N-alkyl chains had a stronger interaction. The PCA and theoretical quantum mechanical and molecular mechanic methods were also utilized to determine the structure of DNA with the two α-aminobisphosphonates (B1 and B2).

  1. High-resolution Multi-instrument Observations of Ion Outflows in the Topside Ionosphere on the Enhanced Polar Outflow Probe (e-POP)

    Science.gov (United States)

    Yau, A. W.; Cogger, L. L.; Howarth, A. D.; James, H. G.; McWilliams, K. A.; Miles, D. M.; Perry, G. W.; Peterson, W. K.

    2015-12-01

    The high measurement resolution capability of the Enhanced Polar Outflow Probe (e-POP) instrument suite (up to ~150 samples/sec) onboard the polar-orbiting Canadian CASSIOPE satellite (325 × 1500 km; 81° inclination) provides the first opportunity to investigate the dynamic structures of ion up-flows and outflows in the topside ionosphere and associated auroral and wave-particle interaction processes, at different magnetic local times and down to sub-km scale. We present observations in selected quiet- and storm-time e-POP orbits, including orbits in close conjunction with DMSP and/or the SuperDARN radar, and including data from the low-energy imaging ion mass spectrometer, fast auroral imager, radio receiver instrument, fluxgate magnetometer, and suprathermal electron imager. The observed features include localized regions of enhanced ion up-flows or down-flows down to the F-region within the aurora; the persistence of non-negligible up-flows at quiet times; the larger-than-expected fluxes of atomic and molecular nitrogen ions; and "polar-wind" H+ion flow on closed auroral field lines co-existing with auroral bulk flows below DMSP altitudes. We will discuss the implications of these features on magnetosphere-ionosphere coupling and magnetospheric ion composition.

  2. 不同消毒方法对手术器械清洗质量的影响%Impact of the different sterilization methods on the cleaning quality of surgical instruments

    Institute of Scientific and Technical Information of China (English)

    林秋霞; 谢碧娴; 林爱惜

    2011-01-01

    目的:探讨机械热力消毒法与含氯消毒剂浸泡消毒法在手术器械清洗中的应用效果.方法:将100件非特殊感染手术器械分为A组和B组各50件,A组采用机械热力消毒,B组采用含氯消毒剂浸泡消毒.比较两组清洗质量.结果:两组手术器械合格率目测法比较差异无统计学意义(P>0.05),细菌培养法比较A组合格率明显高于B组(P<0.05).结论:采用机械热力消毒法处理手术器械可提高清洗质量,值得推广.%Objective: To investigate the application effect of mechanical thermal disinfection and immersion disinfection with chlorine -containing disinfectant in the cleaning of surgical instruments.Methods: 100 pieces of surgical instruments with non - specific infection were divided into group A and group B ( 50 pieces for each group ).The mechanical thermal disinfection was used in the group A and immersion disinfection with chlorine - containing disinfectant was utilized in the group B.The cleaning quality was compared between the two groups.Results: The difference in the comparison of the qualified rate of disinfected surgical instruments by visual method was not statistically significant ( P > 0.05 ); the qualified rate of disinfected surgical instruments compared by bacterial culture method is markedly higher in the group A than the group B ( P < 0.05 ).Conclusion: Application of the mechanical thermal disinfection can improve the cleaning quality of surgical instruments, it is recommended to be widely used.

  3. The dissection profile and mechanism of tissue-selective dissection of the piezo actuator-driven pulsed water jet as a surgical instrument: laboratory investigation using Swine liver.

    Science.gov (United States)

    Yamada, Masato; Nakano, Toru; Sato, Chiaki; Nakagawa, Atsuhiro; Fujishima, Fumiyoshi; Kawagishi, Naoki; Nakanishi, Chikashi; Sakurai, Tadashi; Miyata, Go; Tominaga, Teiji; Ohuchi, Noriaki

    2014-01-01

    The water jet technique dissects tissue while sparing cord-like structures such as blood vessels. The mechanism of such tissue-selective dissection has been unknown. The novel piezo actuator-driven pulsed water jet (ADPJ) system can achieve dissection with remarkably reduced water consumption compared to the conventional water jet; however, the system's characteristics and dissection capabilities on any organ have not been clarified. The purposes of this study were to characterize the physical properties of the novel ADPJ system, evaluate the dissection ability in swine organs, and reveal the mechanism of tissue-selective dissection. The pulsed water jet system comprised a pump chamber driven by a piezo actuator, a stainless steel tube, and a nozzle. The peak pressure of the pulsed water jet was measured through a sensing hole using a pressure sensor. The pulsed water jet technique was applied on swine liver in order to dissect tissue on a moving table using one-way linear ejection at a constant speed. The dissection depth was measured with light microscopy and evaluated histologically. The physical properties of swine liver were evaluated by breaking strength tests using tabletop universal testing instruments. The liver parenchyma was also cut with three currently available surgical devices to compare the histological findings. The peak pressure of the pulsed water jet positively correlated with the input voltage (R(2) = 0.9982, p dissection depth. The dissection depth negatively correlated with the breaking strength of the liver parenchyma (R(2) = 0.6694, p dissected, preserving the hepatic veins and Glisson's sheaths in contrast to what is commonly observed with electrocautery or ultrasonic instruments. The dissection depth of liver tissue is well controlled by input voltage and is influenced by the moving velocity and the physical properties of the organ. We showed that the device can be used to assure liver resection with tissue selectivity due to tissue

  4. Evaluation of the effectiveness of a water lift system in the sinus membrane-lifting operation as a sinus surgical instrument.

    Science.gov (United States)

    Kim, Dae Y; Itoh, Yusaku; Kang, Tae H

    2012-08-01

    The effectiveness of a Water Lift System in the sinus membrane-lifting operation was examined. This investigation focused on the capability of this equipment to reduce the risk of Schneiderian membrane perforation. A preliminary clinical study on the use of the Water Lift System in sinus membrane elevation to place implants through the sinus floor was conducted. A total of 70 sinus membrane-lifting operations were performed on patients with various bone heights ranging from 1.2 to 9.9 mm (most commonly in the range of 4-6 mm) through the lateral approach (four cases) or the crestal approach (66 cases). In all of the cases performed using the lateral approach, sinus membrane perforation did not occur. In the 66 cases performed using the crestal approach, Schneiderian membrane tearing occurred in two cases. The membrane tearing occurred during elevation of the Schneiderian membrane but not when a hole was drilled to access the Schneiderian membrane. One case of membrane tearing resulted from previous inflammation in the maxillary sinus, and the other case of membrane tearing was caused by application of excessive hydraulic pressure. In addition, similar outcomes were obtained and no microbial infections were observed in a total of 68 successful cases. In this study, the Water Lift System was confirmed to effectively reduce the risk of Schneiderian membrane perforation during the sinus membrane-lifting operation. We conclude that the Water Lift System deserves to be considered as a sinus surgical instrument, which ensures safety in the sinus membrane-lifting operation. © 2010 Wiley Periodicals, Inc.

  5. Investigation of Structural, Compositional and Anti-Microbial Properties of Copper Thin Film Using Direct Current Magnetron Sputtering for Surgical Instruments

    Science.gov (United States)

    Kalaiselvam, S.; Sandhya, J.; Krishnan, K. V. Hari; Kedharnath, A.; Arulkumar, G.; Roseline, A. Ameelia

    Surgical instruments and other bioimplant devices, owing to their importance in the biomedical industry require high biocompatibility to be used in the human body. Nevertheless, issues of compatibility, bacterial infections are quite common in such devices. Hence development of surface coatings on various substrates for implant applications is a promising technique to combat the issues arising in these implant materials. The present investigation aims at coating copper on stainless steel substrate using DC Magnetron sputtering which is used to achieve film of required thickness (0.5-8μm). The deposition pressure, substrate temperature, power supply, distance between the specimen and target are optimized and maintained constant, while the sputtering time (30-110min) is varied. The sputtered copper thin film’s morphology, composition are characterized by SEM and EDAX. X-ray diffraction analysis shows copper oriented on (111) and (002) and copper oxide on (111) planes. The contact angle of copper thin film is 92∘ while AISI 316L shows 73∘. The antimicrobial studies carried in Staphylococcus aureus, Escherichia Coli, Klebsiella pneumonia and Candida albicans show that the maximum reduction was seen upto 35, 26, 54, 39CFU/mL, respectively after 24h. The cell viability is studied by MTT assay test on Vero cell line for 24h, 48h and 72h and average cell viability is 43.85%. The copper release from the thin film to the culture medium is 6691μg/L (maximum) is estimated from AAS studies. The copper coated substrate does not show much reaction with living Vero cells whereas the bacteria and fungi are found to be destroyed.

  6. Development of surgical gamma probes with TlBr semiconductors and CsI(Tl) scintillators crystals; Desenvolvimento de sondas cirurgicas radioguiadas com semicondutores de TlBr e com cristais cintiladores de CsI (Tl)

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Fabio Eduardo da

    2006-07-01

    Radio guided surgery, using probes with radiation detectors, has been prominence in the medical area in the last decade. This technique consists in injecting a radioactive substance to concentrate in tumour and assist the localization during the surgical procedure. The radio guided surgeries allowing the identification of lymph node has revolutioned the behavior of tumour in initial stadium when are being spread by lymphatic way. The conditions imposed to the surgery due the proximity between some lymph nodes, demands of the probes, a small diameters and capacity of individual identification of these lymph nodes radiolabelled by a specific tracer. The international market supplies these probes with CdTe semiconductors and scintillators, but there is some time lack a promptly technical assistance in the Brazilian market. This work developed probes with national technology, using CsI(Tl) scintillators crystals and, in substitution to CdTe crystals semiconductors, the TlBr crystal, that is a new semiconductor detector in a world-wide development, with advantages in relation to the CdTe. Both crystals have been grown in IPEN. All the necessary electronics, specially, the preamplifier, that was also a restrictive factor for development of these types of probe in the country, have been developed with components found in the national market. Systematic measures of spatial resolution, spatial selectivity, maximum sensitivity and quality of the shielding have been carried the probes development. The results have shown that the probes, one with the CsI(Tl) crystal and another with TlBr semiconductor presented the requested performance in the international literature for radio guided probes. (author)

  7. Research of Cleaning Quality of Surgical Instruments in Two Ways%两种方法清洗手术器械的质量研究

    Institute of Scientific and Technical Information of China (English)

    吴少玲

    2013-01-01

      目的:为提高医院手术污染器械清洗质量,选用科学合理的清洗方法。方法:将污染器械800件,随机分为实验组和对照组各400件,实验组器械清洗方法为,先将污染器械在超声波清洗槽内加多酶振荡洗涤10 min,然后放入全自动清洗消毒机内启动运行程序:加清洁剂清洗→漂洗→上润滑油保养→干燥;对照组器械清洗方法为:将污染器械放入含有效氯500 mg/L 的消毒剂溶液中浸泡30 min,然后手工逐个刷洗→上润滑油→烘干机干燥。结果:实验组污染器械清洗的洁净度合格率和隐血试验的合格率均达99%以上,HBsAg 检测合格率达94%,而对照组隐血试验合格率为94.5%,HBsAg 检测合格率仅为74%,两组清洗质量合格率有显著差异(P<0.05)。结论:实验组的清洗质量明显优于对照组。%  Objective:To improve cleaning quality of surgical instruments with pollution in the hospital,a scientific and reasonable method of cleaning was selected.Methods:800 polluted instruments were randomly divided into experimental and control groups,400 in each group.Cleaning methods of instruments for the experimental group,the first contaminated equipment was oscillated and washed with multi-enzyme in the tank of ultrasonic launder machine for 10 minutes, and then was placed in the fully automatic cleaning disinfection machine,start running the program:to be washed with detergent → to be rinsed → to be greased → to be dried;cleaning methods of equipment for the control group:pollution equipment chlorine soak in disinfectant solution containing chlorine 500 mg/L for 30 minutes,and then were manually scrubbed one by one → to be greased → to be dried with a dryer.Results:In the experimental group,pass rates of cleanliness of the contaminated equipment that had been cleaned and pass rates of the occult blood test were more than 99%,and pass rate of the detection of HBsAg was up to

  8. FY1995 development of a endoscopic surgical system utilizing multi-modal functional images; 1995 nendo tashu kino gazo wo mochiiru teishinshu naishikyo shujutsu system no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-05-01

    The purpose of this study is to develop an endoscope system for neurosurgery that can provide not only conventional endoscopic images but also ultraviolet-visible spectra, fluorescence spectra, near infrared spectra, and ultra-soundimages of tissue aiming for real-time identification of pathological tissue. The system also incorporates surgical manipulator and devices such as micro forceps and laser surgical instruments for endoscopic image guided surgery. Surgical Manipulator should be a high performance and easy to operate surgical instrument as well as conventional surgical tools such as scissors and knife. Since living tissue deforms during surgical operation, pre-operative three dimensional information for registration of pathological tissue should be modified based on information obtained during surgery. Thus surgical manipulator should be operated under guidance of surgeon's observation. Consequently, surgical manipulator should have various types of imaging and measurement devices such as an endoscope and an ultrasound imaging probe at its end effectors. Based on this concept, a prototype of a new multi channel surgical manipulator system CM cube (CM3, Computer aided Micro Multichannel Manipulator) that has various types of imaging and measurement devices such as ultra-violet-visible camera for spectroscopic measurement, ultra-sound imaging probe, three dimensional endoscope, together with micro surgical instruments and laser surgical systems has been developed. Its performance was evaluated through in vitro/in vivo experiments and clinical application. (NEDO)

  9. Conductivity Probe

    Science.gov (United States)

    2008-01-01

    The Thermal and Electrical Conductivity Probe (TECP) for NASA's Phoenix Mars Lander took measurements in Martian soil and in the air. The needles on the end of the instrument were inserted into the Martian soil, allowing TECP to measure the propagation of both thermal and electrical energy. TECP also measured the humidity in the surrounding air. The needles on the probe are 15 millimeters (0.6 inch) long. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  10. ATP生物荧光技术在手术器械清洗效果评价中的应用研究%Study on application of ATP bioluminescence technique in surgical instruments cleaning effect monitoring

    Institute of Scientific and Technical Information of China (English)

    张玉勤; 赵奇; 高丽君; 袁中良; 吕明洁; 刘吉起

    2016-01-01

    Objective To compare the difference in clean effect monitoring between ATP bioluminescence technique and other methods.Methods Naked eye observation,magnifying glass observation and ATP bioluminescence were used to monitor the clean effect of surgical instruments.Results 440 surgical instruments were examined by naked eye observation and magnifying glass observation,the qualified rate were 96.36% and 95.68% respectively.320 surgical instruments were examined by ATP bioluminescence technique after the observational methods and the qualified rate was 87.87%.The range of qualified rate was from 50% to 100% among the different kinds of surgical instruments.Conclusion ATP bioluminescence technique was a rapid,simple and effective method for monitoring the clean effect of surgical instruments.%目的 用ATP生物荧光技术评价全自动手术器械清洗机对各类手术器械的清洗效果,比较不同评价方法的差异.方法 采用肉眼裸视法、放大镜观察法与ATP生物荧光检测法监测各类手术器械清洗效果.结果 共监测手术器械440份,肉眼裸视法合格率为96.36%,放大镜法合格率为95.68%.有320份样品同时进行了ATP生物荧光检测,合格率为87.81%.各类手术器械的合格率范围为50% ~ 100%.结论 ATP生物荧光检测法是现场评价医疗器械清洗效果的一项快速、简便且有效的方法.

  11. 外科器械运用中免手技术在减少锐器伤中的效果评价%EVALUATION ON EFFECT OF THE HANDS-FREE TECHNIQUE IN REDUCING SHARP INJURY OF SURGICAL INSTRUMENTS

    Institute of Scientific and Technical Information of China (English)

    杨敏; 泮葵芬; 郭云萍; 叶媛媛

    2011-01-01

    目的 观察免手技术在外科器械运用中减少锐器损伤的效果,评估免手技术预防锐器损伤的实用价值.方法 通过手术因素与锐器伤发生风险分析方法,结合实际手术过程分析和评价了免手技术对降低锐器损伤效果.结果 经观察233例使用免手技术的手术过程,发生5例锐器损伤,发生率为2.1%;观察274例未使用免手技术的手术过程,发生14例锐器损伤,发生率为5.1%.两组手术过程锐器损伤发生率比较,具有显著统计学意义.结论 免手技术的使用可降低锐器伤发生率59%,效果明显,值得推广.%Objective To observe the hands - free technology in surgical instruments to reduce the effect of sharp instrument injury, assess the practical value of hands - free technology in prevention of sharp injuries.Methods The surgical operation and the risk of sharp injuries, combined with the actual process of analysis and evaluation of surgical hands - free technology to reduce the effect of sharp instrument injuries.Results 233 patients observed using hands - free technology in surgical procedures, sharp injuries occurred in 5 cases, the occurrence rate of 2.1%.274 patients not using hands free technology in surgical procedures, the occurrence of 14 cases of sharp injuries, the rate was 5.1%.Two surgical procedures incidence of sharp injuries have significant statistical difference.Conclusion Hands - free technology can reduce the incidence of sharp injuries by 59%, the effect was worthy of promotion.

  12. Problems and solutions of management of external surgical instruments in sterilization supply center%外来手术器械在消毒供应中心管理中的问题和对策

    Institute of Scientific and Technical Information of China (English)

    武立娟; 刘春宇

    2011-01-01

    Objective: To introduce the problems and management strategies of taking over external surgical instruments by the sterilization supply center. Methods: The external surgical instruments were divided into the long-term fixed site storage and temporary outgoing delivery, of which both were included into the standardized management processes of the sterilization supply center entirely. The criteria for receiving, cleaning, disinfection, packaging, sterilization, storage, distri -bution and quality inspection were standardized, and the quality control management and quality retrospective registration system were established. Results: The air cleanliness of the operating room was promoted and the cleaning, packaging and sterilization quality of external surgical instruments were improved, which guaranteed the safe use of external instruments and the effective control of hospital infection. Conclusion: The sterilization supply center taking over external surgical instruments can make the best of the modern cleaning, disinfection and sterilization resources of the center, thereby making the nursing work more specialized and standardized.%目的:介绍消毒供应中心承接外来手术器械管理中存在的问题和管理对策.方法:将外来手术器械分为长期定点存放和临时外送两部分,并将这两部分器械全面纳入消毒供应中心标准化管理流程,规范了接收、清洗、消毒、包装、灭菌、存放、发放、质量检测标准,构建了质量监控管理、质量追溯登记制度.结果:提升了洁净手术室空气的洁净度,提高了外来手术器械清洗、包装、灭菌质量,确保外来器械的安全使用,有效控制医院感染的发生.结论:消毒供应中心承接外来手术器械管理,可充分利用中心供应室现代化清洗、消毒、灭菌资源,使护理工作更加专业化、标准化.

  13. Instrument evaluation no. 16. Nuclear enterprises portable doserate meter type PDR4 and external probes types BP1/1, BP8 and GP9

    CERN Document Server

    Burgess, P H

    1979-01-01

    The various radiations encountered in radiological protection cover a wide range of energies and radiation measurements have to be carried out under an equally broad spectrum of environmental conditions. This report is one of a series intended to give information on the performance characteristics of radiological protection instruments, to assist in the selection of appropriate instruments for a given purpose, to interpret the results obtained with such instruments, and, in particular, to know the likely sources and magnitude of errors that might be associated with measurements in the field. The radiation, electrical and environmental characteristics of radiation protection instruments are considered together with those aspects of the construction which make an instrument convenient for routine use. To provide consistent criteria for instrument performance, the range of tests performed on any particular class of instrument, the test methods and the criteria of acceptable performance are based broadly on the a...

  14. 2 232 case reports of pressure steam sterilization for orthopedic surgical instruments%运用压力蒸汽灭菌法灭菌骨科手术器械2232例报道

    Institute of Scientific and Technical Information of China (English)

    周玉英

    2014-01-01

    目的:运用压力蒸汽灭菌法灭菌,确保骨科手术器械灭菌质量,加强医院供应室灭菌质量管理,预防医院感染的发生。方法:采用回顾性分析方法对2232件骨科手术器械进行物理、化学、生物监测,严格控制发放标准。结果:2232件骨科手术器械,经物理监测、化学监测、快速生物监测均合格,但2件出现棉包布有破洞,2件出现无纺布高温炼成破洞,5件出现湿包,3件出现清洗质量不合格。结论:骨科手术器械大多为植入物,系为高度危险性物品,必须严格把握灭菌质量,细化过程管理,保证患者安全。%Objective:To use pressure steam sterilization in order to ensure the quality of orthopedic surgical instruments steri-lization, strengthen quality management of hospital supply room sterilization and prevent the occurrence of hospital infections. Meth-ods:2232 pieces of orthopedic surgical instruments were monitored physically, chemically and biologically by applying pressure steam sterilization, and the provision standard was controlled strictly. Results: 2232 pieces of orthopedic surgical instruments were qualified through the physical, chemical and rapid biological monitoring, however, the cotton cloth of 2 pieces had holes, non-woven fabric of 2 pieces had be heated into holes, 5 pieces had wet bags, and the cleaning quality of 3 pieces was not qualified. Conclusions: Most or-thopedic surgical instruments are implantable, as well as highly dangerous goods. Therefore, it must strictly grasp the quality of sterili-zation and refine process management so as to ensure the safety of patients.

  15. 品管圈活动在提高手术器械包装合格率中的应用%Application of Quality Control Circle activity to improve the qualiifed rate in surgical instruments packaging

    Institute of Scientific and Technical Information of China (English)

    向艺; 郑宣冬

    2014-01-01

    目的:探索通过品管圈活动提高手术器械包装合格率的方法。方法:成立品管圈小组,针对消毒供应中心出现的手术器械包装合格率低的情况,运用品管圈手法进行现状把握、目标设定、要因分析、对策拟定并实施。结果:通过开展品管圈活动,手术器械包装合格率由活动前97.2%提高到99.8%,差异有统计学意义(P<0.01)。结论:开展品管圈活动对提高手术器械包装质量、加强科室间的协作、提升团队精神、快速适应消毒供应中心管理模式变化起到了积极的推动作用。%Objective:To explore the method of improving the rate of qualiifed surgical instruments packaging with the application of Quality Control Circle (QCC) activity. Methods:QCC group was established to grasp the current status, set goals, analyze major factors, form and implement countermeasures with QCC method for the low rate of qualiifed surgical instruments packaging in the disinfection supply center. Result:The rates of qualiifed surgical instruments packaging increased from 97.2%to 99.8%after conducting QCC activities. The difference was statistically significant (P<0.01). Conclusion:QCC activities played a positive role in improving packaging quality of surgical instruments, strengthening collaboration between departments, promoting team spirit, and timely adapting to changes in the management mode of disinfection supply center.

  16. 多酶清洗剂泡沫对手术器械清洗效果的影响%Influence of multiple enzyme detergents with or without foaming on cleaning effect of surgical instruments

    Institute of Scientific and Technical Information of China (English)

    罗敏; 张应先

    2011-01-01

    目的 评价有与无泡沫的多酶清洗剂对手术器械的清洗效果.方法 将术后器械400件随机分成2组,试验组采用无泡沫多酶清洗剂,对照组采用有泡沫多酶清洗剂,清洗后的器械采用了5倍放大镜和白纱布擦拭检测清洁率;并采用卡方检验,比较2组清洗效果.结果 无泡沫多酶清洗剂的清洁合格率为97.5%,明显高于有泡沫多酶清洗剂的70.0%,差异有统计学意义(P<0.01).结论 有泡沫多酶清洗剂清洁效果低于无泡沫多酶消毒剂,且易对清洗机及手工清洗人员造成损伤,因此手术器械清洗应采用无泡沫多酶清洗剂.%OBJECTIVE To assess the cleaning effects of multiple enzyme detergents with or without foaming, METHODS Four hundred surgical instruments were randomly assigned into two groups. Experimental group used multiple enzyme detergent without foaming, while the control group used foaming multiple enzyme detergent to clean the surgical instruments. The cleaning effects of surgical instruments were examined by five-time magnifier and sterilized gauzes. Chi-square test was used to examine the difference of cleaning effects between two groups, RESULTS The cleaning effect of non-foaming multiple enzyme detergent is significantly better than that of foaming detergent (97. 5% vs 70. 0%, P<0. 001). CONCLUSION The non-foaming multiple enzyme detergent has more advantage than foaming detergent, when considering better cleaning effects, less harm to both washing machine and manual cleaners. Thus, non-foaming multiple enzyme detergent should be recommended for cleaning surgical instruments.

  17. Abortion - surgical

    Science.gov (United States)

    Suction curettage; Surgical abortion; Elective abortion - surgical; Therapeutic abortion - surgical ... Surgical abortion involves dilating the opening to the uterus (cervix) and placing a small suction tube into the uterus. ...

  18. Surgical navigation with QR codes

    Directory of Open Access Journals (Sweden)

    Katanacho Manuel

    2016-09-01

    Full Text Available The presented work is an alternative to established measurement systems in surgical navigation. The system is based on camera based tracking of QR code markers. The application uses a single video camera, integrated in a surgical lamp, that captures the QR markers attached to surgical instruments and to the patient.

  19. Improved cleaning methods for cleaning surgical instruments comparative study of quality%改进清洗方法对手术器械清洗质量的影响

    Institute of Scientific and Technical Information of China (English)

    冷星红; 王晓东; 何本珍

    2012-01-01

    目的 探讨一种高效、实用、安全的手术器械清洗流程及方法,以提高清洗质量,保证灭菌效果,有效控制医院感染.方法 选择消毒供应中心回收的污染手术器械900件,分为改进后组(观察组)和改进前组(对照组),每组齿类器械300件,管腔器械150件;观察组采用手工配合全自动清洗机清洗,对照组采用全自动清洗机清洗,比较两组清洗后的目测、5倍放大镜、棉签检测、潜血试验合格率.结果 观察组与对照组目测合格率为98.3%、78.3%,5倍放大镜合格率为93.7%、72.3%,棉签检测合格率为93.3%、59.3%,潜血试验合格率为97.3%、64.7%,经统计检验,两组比较,差异均有统计学意义(P<0.01),即观察组优于对照组.结论 污染的手术器械先用多酶浸泡、刷洗再放入全自动清洗机按清洗流程清洗,这种采用手工配合全自动清洗机清洗手术器械效果理想,可明显提高清洗的质量.%OBJECTIVE To explore an efficient, practical, safe surgical instrument cleaning processes and methods to improve the quality of cleaning to ensure the sterilization effect and the effective control of hospital infections. METHODS A total of 900 pieces of contaminated surgical instrument were selected from the disinfection and supply department, those surgical instruments were assigned into the improved group (the observation group) and the pre-improvement group (the control group) with 300 pieces of tooth type devices and 150 pieces of lumen devices in each group; the observation group was treated with automatic washing machine combined with manual washing, while the control group was processed with automatic washing machine, the qualified rates were compared by respectively using the visual inspection, five times magnifying glass, cotton swab testing, and occult blood test. RESULTS The qualified rates of the visual inspection of the observation group and the control group were 98. 3% and 78. 3

  20. [Results of work on the project "Instruments, reagents, probes" of the state scientific-technical program "Human genome" (1989-1994)].

    Science.gov (United States)

    Tverdokhlebov, E N

    1995-01-01

    This report reviews the activities of the "Reagents, Devices, Probes" branch of the Russian State "Human Genome" Project for six-year period (1989-1994). Data on pilot and commercial production of reagents and equipment for human genome studies along with information on the project costs and awarded grants are presented.

  1. Surgical Lasers In Gynecology

    Science.gov (United States)

    Schellhas, Helmut F.; Barnes, Alfonso E.

    1982-12-01

    Multipurpose surgical CO2 lasers marketed in the USA have been developed to be applicable to a variety of surgical procedures in many surgical fields. They are all suited for endoscopic surgical procedures and can be fitted to all standard surgical microscopes. They all can adjust the focal length of the laser beam to the different standard focal lengths of the surgical microscope which for instance in laryngoscopy is 400 mm and in colposcopy 300 mm. One laser instrument can even change the spot size in a given focal distance which is very advantageous for some microsurgical procedures (Merrimack Laboratories 820). All multipurpose surgical CO2 laser systems provide a multi-articulated surgical arm for free-hand surgery. The surgical arms are cumbersome to use but they are adapted to the surgeons needs with ingenuity. The practicality of the multi-articulated surgical arms depends mostly on the distance of the handpiece from the surgical console which now is also overbridged by the laser tube in most surgical laser system. The spot size of the beam is variable in most handpieces by interchangeable lenses which modify the focal distance of the beam and the power density. Another common feature in all systems is a coaxial He-Ne pilot light which provides a red spot which unfortunately becomes invisible in a bleeding surgical field. Most surgical laser systems have a spacial mode of TEM 00 which is essential for incisional surgery. The continuous mode of beam delivery is used for incisional surgery and also for most endoscopic procedures.

  2. Identification of sentinel lymph node in breast cancer by lymphoscintigraphy and surgical gamma probe with peritumoral injection of scintimammographic agent ''{sup 99m}Tc MIBI''

    Energy Technology Data Exchange (ETDEWEB)

    Aras, G.; Arican, P.; Cam, R.; Kuecuek, N.OE.; Ibis, E.; Tuezuener, A.; Soylu, A [Ankara Univ. (Turkey). Medical Faculty

    2002-04-01

    The purpose of this study was to evaluate the efficacy of lymphoscintigraphy and the surgical gamma probe (SGP) with peritumoral injection of {sup 99m}Tc MIBI in sentinel lymph node (SLN) detection in breast cancer regardless of whether metastatic or not. Thirty patients with T1/T2 breast cancer had peritumoral injections of {sup 99m}Tc MIBI (74 MBq/0.2 ml at 4 different locations) at 2, 6 and 24 hours before surgery. Anterior, anterolateral, and lateral spot images were taken at 10, 30, 45, 60 and 120 minutes. Counts were collected from the injection site, affected breast tissue, internal mammaries, axillary and supraclavicular regions, and the contralateral side. Peritumoral blue dye was also injected at surgery. The first lymph nodes with counts twice the background tissue and/or with blue dye uptake were surgically isolated, and histopathological evaluations were made. Modified radical mastectomy was performed on all patients. Twenty-three out of thirty patients had lymph nodes in scintigrams and the sentinel lymph nodes were identified with SGP in 25/30 patients. Lymphoscintigraphy and subsequent SGP detection with peritumoral injection of {sup 99m}Tc MIBI can be used for identifying SLN in breast cancer. (author)

  3. Surgical Assisting

    Science.gov (United States)

    ... Insert and remove Foley urinary bladder catheter Place pneumatic tourniquet Confirm procedure with surgeon Drape patient within ... Technology and Surgical Assisting (NBSTSA) offers the CertifiedSurgical First Assistant (CSFA) credential, and the National Surgical Assistant ...

  4. 不同预处理方法对手术器械清洗效果的影响%Influence of different pretreatment methods on effect of cleaning of surgical instruments

    Institute of Scientific and Technical Information of China (English)

    崔兴芬; 肖海荣; 王彩华

    2015-01-01

    目的:研究探讨使用不同预处理方法对于手术器械清洗效果的影响,为临床建立合理的手术器械清洗流程、提高手术器械清洗质量提供依据。方法选取450件手术器械随机分为3组,每组各150件;A组不进行预处理,B组放入清水浸泡6 min ,C组放入新鲜配置好的多酶清洗液中浸泡6 min ,然后将3组器械分别放入经过验证的清洗机中进行清洗,清洗后的器械先通过目测均合格后,再采用3M Clean‐T race表面蛋白测试棒对于每件器械进行蛋白测试。结果 A组器械使用蛋白测试棒检测后的合格率分别为后齿类器械73.3%、管腔类器械70.0%、咬骨钳67.7%、取瘤钳63.3%和活检钳73.3%,总合格率为69.3%;B组每类器械的合格率分别为后齿类器械90.0%、管腔类器械83.3%、咬骨钳93.3%、取瘤钳86.7%和活检钳86.7%,总合格率为88.0%;C组每类器械的合格率均为100.0%,总合格率为100.0%;3组比较差异有统计学意义( P<0.01)。结论对于回收的各类手术器械,先使用多酶浸泡进行预处理,对于优化清洗流程、提高器械清洗效果具有显著意义。%OBJECTIVE To explore the influence of different pretreatment measures on effect of cleaning of surgical instruments so as to establish reasonable cleaning procedures of surgical instruments and raise the cleaning quality . METHODS A total of 450 pieces of surgical instruments were randomly divided into three groups ,with 150 pieces in each ;the group A was not given the pretreatment ,the group B was soaked with clean water for 6 min ,the group C was soaked with fresh configured multi‐enzyme cleaning solution for 6 min ,then the three groups of sur‐gical instruments were placed in the validated cleaning machines for cleaning ,the visual inspection was employed to screen the qualified cleaned instruments ,and the protein test was

  5. Joseph-Frédéric-Benoît Charrière - How to Explain His Success as One of the Most Famous Surgical Instrument Makers Regarding His Life from Childhood to Death.

    Science.gov (United States)

    Badawi, Jasmin Katrin

    2017-01-01

    We use the name 'Charrière' every day as a unit of measurement. This article explains his success as one of the most famous instrument makers who ever lived. A review of the literature was completed using PubMed. Additionally, material of historical sources like the museum of Bulle was used. Joseph-Frédéric-Benoît Charrière was born in Switzerland in 1803. At the age of 13, he moved to Paris and learned the profession of a cutler. In 1820, he took over the workshop of his teacher Vincent. Dupuytren was one of the most important people in Charrière's professional life. Charrière specialized in the fabrication of surgical instruments of such high quality that he was very sought after by famous surgeons. In 1837, Charrière went to Sheffield, England, to learn more about working with metals and alloys. In 1851, he was inducted into the Legion of Honour. Charrière died in 1876 in Paris. The patronage of Dupuytren was a very important supporting factor in Charrière's professional life, but mainly his great courage, the willingness to learn from others, his creativity and technical fantasy and his curiosity and broad interest in a lot of different fields explain his unmatched professional success. © 2016 S. Karger AG, Basel.

  6. 碱性清洗剂保湿处理对手术器械防锈效果观察%Observation on antirust effect of alkaline detergent moisturizing treatment for surgi-cal instruments

    Institute of Scientific and Technical Information of China (English)

    夏淑娇; 陈彩央; 张晔; 舒君美; 徐永仙; 钱旭聪

    2015-01-01

    目的:研究碱性清洗剂保湿处理对使用后手术器械防锈效果。方法通过肉眼裸视检测方法,观察一种碱性清洗剂用于夜间手术后器械保湿处理的防锈效果。结果普通手术组手术后器械经碱性清洗剂作保湿处理的观察组,有极个别器械出现变色但未出现锈斑,合格率为99.04%。感染性手术组使用后手术器械先经含氯消毒液浸泡后,再用碱性清洗剂作保湿处理的观察组,有极少数器械出现变色,合格率为98.52%;对照组使用后器械只用水浸泡保湿处理的出现多件3处及以上的锈斑,合格率为76.17%。结论使用后手术器械不论是否经含氯消毒液浸泡,使用碱性清洗剂作保湿处理均可有效保湿并可防止器械锈蚀。%Objective To study the antirust effect of alkaline detergent moisturizing treatment for surgical instruments. Methods Eyesight detection method,the antirust effect of a kind of alkaline cleaner used for night postoperative instru-ments moisturizing treatment was used to observed. Results The equipment after normal operation by using alkaline clean-ing agent for moisturizing treatment as observation group,only very few instruments appeared color change,but not rust spots,the qualified rate was 99. 04%. The equipment after infectious operation by using chlorine disinfectant soaking and then alkaline cleaning agent for moisturizing treatment as observation group,also only a handful of devices appeared color change,the pass rate was 98. 52%. The instruments only by using water soaking for moisturizing treatment as control group,many devices appeared three and more rusty spots,the pass rate was only 76. 17%. Conclusion For instrument after operation with or without chlorine disinfectant soaking,using alkaline detergent for moisturizing treatment can moistur-ize and prevent the equipment corrosion.

  7. Mobile Probing and Probes

    DEFF Research Database (Denmark)

    2013-01-01

    Mobile probing is a method, developed for learning about digital work situations, as an approach to discover new grounds. The method can be used when there is a need to know more about users and their work with certain tasks, but where users at the same time are distributed (in time and space......). Mobile probing was inspired by the cultural probe method, and was influenced by qualitative interview and inquiry approaches. The method has been used in two subsequent projects, involving school children (young adults at 15-17 years old) and employees (adults) in a consultancy company. Findings point...... to mobile probing being a flexible method for uncovering the unknowns, as a way of getting rich data to the analysis and design phases. On the other hand it is difficult to engage users to give in depth explanations, which seem easier in synchronous dialogs (whether online or face2face). The development...

  8. Mobile Probing and Probes

    DEFF Research Database (Denmark)

    2012-01-01

    Mobile probing is a method, which has been developed for learning about digital work situations, as an approach to discover new grounds. The method can be used when there is a need to know more about users and their work with certain tasks, but where users at the same time are distributed (in time...... and space). Mobile probing was inspired by the cultural probe method, and was influenced by qualitative interview and inquiry approaches. The method has been used in two subsequent projects, involving school children (young adults at 15-17 years old) and employees (adults) in a consultancy company. Findings...... point to mobile probing being a flexible method for uncovering the unknowns, as a way of getting rich data to the analysis and design phases. On the other hand it is difficult to engage users to give in depth explanations, which seem easier in synchronous dialogs (whether online or face2face...

  9. Mobile Probing and Probes

    DEFF Research Database (Denmark)

    2012-01-01

    Mobile probing is a method, which has been developed for learning about digital work situations, as an approach to discover new grounds. The method can be used when there is a need to know more about users and their work with certain tasks, but where users at the same time are distributed (in time...... and space). Mobile probing was inspired by the cultural probe method, and was influenced by qualitative interview and inquiry approaches. The method has been used in two subsequent projects, involving school children (young adults at 15-17 years old) and employees (adults) in a consultancy company. Findings...... point to mobile probing being a flexible method for uncovering the unknowns, as a way of getting rich data to the analysis and design phases. On the other hand it is difficult to engage users to give in depth explanations, which seem easier in synchronous dialogs (whether online or face2face...

  10. 应用持续质量改进减少外科护士锐器伤的发生率%To reduce incidence of sharp instrument injury in surgical nurses by using continuous quality improvement

    Institute of Scientific and Technical Information of China (English)

    余儒; 黄爱微; 谢少华; 李艳艳; 赵秀芬; 陈丽芬

    2011-01-01

    OBJECTIVE To evaluate the effect of using continues quality improvement (CQI) to reduce the incidence of sharp instrument injury in surgical nurses. METHODS The PDCA (plan-do-check-act) cycle was used to execute the CQI. The precautions were stressed, the process of administration and prevention was paid attention to. The guide line was made and executed to reduce the incidence of sharp instrument injury. RESULTS After practicing the CQI for 1 year, the ratio of injury (by ampoule) decreased from 92.9% to 60.7%; the frequency of sharp instrument injury (except the injury by ampoule) decreased form 2.32 times per person to 1.46 times per person. CONCLUSION Applying the CQI and more prevention measures can reduce the incidence of sharp instrument injury, consequently decrease the incidence of occupational infection and blood transmitted diseases.%目的 通过持续质量改进的实施与效果评价,减少外科护士锐器伤的发生率.方法 应用PDCA循环进行持续质量改进,强调预防为主,注重过程管理,设定并执行减少外科护士锐器伤发生率的流程.结果 经过1年的实践,护士发生安瓿破裂致伤所占总人数比例由92.9%降至60.7%;护士发生锐器伤(除外安瓿裂伤)人均次数由2.3次降至1.5次.结论应用持续质量改进的方法,采取预防为主、注重过程管理,能减少护士锐器伤的发生率从而减少了职业感染的机会及降低血源性传播疾病的发生率.

  11. Causes of wet packages of surgical instruments under centralized supply and the countermeasures%集中供应手术器械灭菌湿包原因分析及对策

    Institute of Scientific and Technical Information of China (English)

    吴佳伟; 周染云; 张莹; 杨春燕; 徐丽丽; 王国权

    2013-01-01

    OBJECTIVE To explore the causes of the wet packages of the surgical instruments and the dressing sterilization bags in central sterile supply department so as to put forward the solutions to ensure the sterilization quality. METHODS The surgical instrument packages and dressing kits packed by textile cotton or non-woven fabric were placed into the sterilizer after weighing all of them to run a sterilization cycle in accordance with the standard operation procedure of pulsating vacuum pressure steam sterilizer. The water stains, water droplets, and watermark were observed after the sterilization to see whether they remained on the packages, then all of the packages were weighed after being placed for 10min or 20min, a consecutive monitoring for 3 days. RESULTS Of all the instrument packages, there were two packages being wet at corners, and of all the dressing packages, there were two packages with water droplets remaining outside the packages; demonstrated by the weighing before and after the sterilization, the overweight dressing packages and instrument packages were prone to be wet; the non-woven fabric packages were easier than the textile cotton ones to be wet; 73. 0% of the packages were overweight when weighing immediately after the sterilization, 17. 3% overweight after being placed for 10 min, and none overweight after being placed for 20min. CONCLUSION The wet packages can be reduced by lessening the weight of the packages and by using the textile cotton packages instead of the non-woven fabric packages as well as extending the time of the packages placement in the sterilizer.%目的 探索供应室集中供应手术器械和敷料灭菌包湿包的原因,并讨论解决方法以保证灭菌质量.方法 将使用纺织棉布或无纺布包装的手术器械包和敷料包称重随后放人灭菌器,按脉动真空压力蒸汽灭菌器的正常操作流程运行1个灭菌周期,观察灭菌后的器械包和敷料包是否有

  12. ISIS/EPI-Lo: A New Instrument for Measuring keV to MeV Ions and Electrons with Simultaneous Half-Sky Coverage on NASA's Solar Probe Plus Mission

    Science.gov (United States)

    Hill, M. E.; Mitchell, D. G.; McNutt, R. L., Jr.; Cooper, S.; Crew, A. B.; Dupont, A.; Hayes, J.; Hoffer, E.; Nelson, K.; Parker, C.; Schlemm, C., II; Seifert, H.; Stokes, M.; Angold, N. G.; McComas, D. J.; Weidner, S.; Wiedenbeck, M. E.

    2016-12-01

    The Solar Probe Plus (SPP) Mission's Integrated Science Investigation of the Sun (ISIS) is a suite of two energetic particle instruments, EPI-Lo and EPI-Hi, covering lower ( 10 keV-100 MeV) and higher ( 1-100 MeV/nuc) energies, respectively. The ISIS team will investigate the origins, acceleration, and transport of energetic particles in the corona and inner heliosphere during the planned 7-year, 24-orbit mission, with a perihelion initially of 0.16 AU (36 Solar radii; RS), the three final orbits reaching 0.044 AU (9.9 RS). EPI-Lo has a novel approach to obtaining large angular coverage, well-suited to 3-axis stabilized spacecraft such as SPP, by densely sampling its 2π steradian field of view with 80 apertures organized in eight matching, 10-aperture wedges. Each wedge relies primarily on time-of-flight (TOF) mass spectrometer techniques, employing thin secondary-electron-emitting foils, microchannel plates, and solid state detectors (SSDs), to measure ions from 50 keV - 15 MeV and electrons from 50-500 keV. Signal attenuation, absorbers, TOF-only measurements, and SSD-only techniques are used to extend this energy range higher and lower. In 2015 and 2016 we made measurements with engineering units and flight-spare EPI-Lo wedges at accelerators and with radioactive sources; in addition to presenting the instrument design, we will report the results from these tests to characterize the instrument's measurement performance.

  13. Surgical Robotics Research in Cardiovascular Disease

    Energy Technology Data Exchange (ETDEWEB)

    Pohost, Gerald M; Guthrie, Barton L; Steiner, Charles

    2008-02-29

    This grant is to support a research in robotics at three major medical centers: the University of Southern California-USC- (Project 1); the University of Alabama at Birmingham-UAB-(Project 2); and the Cleveland Clinic Foundation-CCF-(Project 3). Project 1 is oriented toward cardiovascular applications, while projects 2 and 3 are oriented toward neurosurgical applications. The main objective of Project 1 is to develop an approach to assist patients in maintaining a constant level of stress while undergoing magnetic resonance imaging or spectroscopy. The specific project is to use handgrip to detect the changes in high energy phosphate metabolism between rest and stress. The high energy phosphates, ATP and phosphocreatine (PCr) are responsible for the energy of the heart muscle (myocardium) responsible for its contractile function. If the blood supply to the myocardium in insufficient to support metabolism and contractility during stress, the high energy phosphates, particularly PCr, will decrease in concentration. The high energy phosphates can be tracked using phosphorus-31 magnetic resonance spectroscopy ({sup 31}P MRS). In Project 2 the UAB Surgical Robotics project focuses on the use of virtual presence to assist with remote surgery and surgical training. The goal of this proposal was to assemble a pilot system for proof of concept. The pilot project was completed successfully and was judged to demonstrate that the concept of remote surgical assistance as applied to surgery and surgical training was feasible and warranted further development. The main objective of Project 3 is to develop a system to allow for the tele-robotic delivery of instrumentation during a functional neurosurgical procedure (Figure 3). Instrumentation such as micro-electrical recording probes or deep brain stimulation leads. Current methods for the delivery of these instruments involve the integration of linear actuators to stereotactic navigation systems. The control of these delivery

  14. Mobile Probing and Probes

    DEFF Research Database (Denmark)

    2013-01-01

    to mobile probing being a flexible method for uncovering the unknowns, as a way of getting rich data to the analysis and design phases. On the other hand it is difficult to engage users to give in depth explanations, which seem easier in synchronous dialogs (whether online or face2face). The development...

  15. Cleaning qualities of different cleaning methods for surgical instruments at night%夜间手术器械不同清洗方法的质量比较

    Institute of Scientific and Technical Information of China (English)

    殷秀娟; 肖丽妹; 沈玉琴; 祝慧琴

    2011-01-01

    目的 探讨安全、有效的夜间手术器械清洗流程和方法,提高夜间手术器械的清洗质量.方法 将夜间使用后的手术器械1680件(咬合类器械1200件、管腔类器械480件),随机分为A、B、C、D组,采用4种不同的清洗方法;A组:立即清洗法;B组:干式保存法;C组:刷洗保存法;D组:酶液保存法,比较各组目测、5倍放大镜、特殊棉签检测、残留血检测、菌落数及内毒素检测合格率.结果 A、B、C、D组合格率目测为78.3%、86.9%、94.5%、96.4%;5倍放大镜为71.9%、81.9%、92.6%、93.8%;特殊棉签检测为59.2%、74.2%、90.8%、93.3%;残留血检测为64.2%、85.8%、96.7%、98.3%;菌落数为46.7%、93.3%、100.0%、100.0%;内毒素为43.3%、93.3%、100.0%、100.0%.经统计学检验,4组比较差异有统计学意义(P<0.05).结论 使用后的夜间手术器械采用刷洗保存法和酶液保存法,均能明显提高器械的清洗质量及残留血检测合格率,但酶液保存法,具有安全性,可操作性强.%OBJECTIVE To explore the safety and effective process or methods for cleaning surgical instruments at night, and also to improve the cleaning quality of surgical instruments at night.METHODS A total of 1680 pieces surgical instruments (occlusal class device 1200, the lumen type device 480) were divided into A, B, C, D groups randomly, using four different cleaning methods to clean them.Four cleaning methods were A group (immediate cleaning method); B group (dry stored); C group (scrub save); D group (save the enzyme solution), then six standards, such as visual, five times magnifying glass, special swab testing, residue testing of blood, colony count and endotoxin detection to were used to test the pass rate of these four cleaning methods.RESULTS The pass rates of A, B, C, D group: in visual were 78.3%, 86.9%, 94.5% and 96.4%; five times magnifying glass were 71.9%, 81.9%, 92.6% and 93.8%; white gauze were 59.2%, 74.2%, 90.8% and 93

  16. 不同预处理方法对手术器械清洗质量的效果观察%Effect of Different Pretreatment Methods on Cleaning Surgical Instruments

    Institute of Scientific and Technical Information of China (English)

    葛多云; 陈付华; 张淑琴; 马民

    2013-01-01

    Objective To explore the best cleaning method,improve the cleaning quality,and guarantee the quality of the final cleaning from observing the influence of different pretreatment methods on cleaning quality of surgical instruments.Methods 1000 light pollution surgical instruments were randomly divided into experimental group and control group,each group of 500,pollution degree and type between the two groups had no significant difference.The experimental group was soaked 5-10minutes by RUHOF multi-enzyme cleaning solution after irrigated with flowing water,then cleaning and disinfection machine.Control group was cleaned by full automatic cleaning and disinfection machine directly after irrigated with flowing water.The cleaning quality of the instruments was reassessed by eye,magnifying glass,and STF detection card.Results The cleaning quality of experimental group was better than that of the control group,the difference was statistically significant (P < 0.05).Conclusion Multi-enzyme cleaning solution with full automatic cleaning and disinfection machine can effectively remove the blood,organic pollution,improve cleaning quality,ensure the sterilization quality,and avoid sterilization failure for not thorough cleaning.The method had strong operability.%目的 观察不同预处理方法对手术器械清洗质量的影响,寻求最佳的清洗方法,提高手术器械清洗质量,保证灭菌效果.方法 将1000件手术后污染器械随机分成实验组与对照组,每组500件,两组之间的手术器械污染程度、种类无显著差异性.实验组将回收的手术器械用流动水冲洗后放在1∶270鲁沃夫全效型多酶清洗液中浸泡5~10min,再进行全自动清洗消毒机清洗;对照组将回收的手术器械用流动水冲洗后直接放在全自动清洗消毒机清洗.对1000件手术器械逐一进行目测和放大镜检查,并借助于STF检测卡模拟检测清洗质量.结果 实验组清洗质量明显优于对照

  17. [Roman medical instruments from Lower Moesia].

    Science.gov (United States)

    Aparaschivei, D; Matei, I

    2010-01-01

    To elucidate the evolution of society over time, ancient medicine is a very interesting and important researching field. Archaeological discoveries, such as the objects described by this article, but other ancient sources, also, are able to provide a complex framework of medical practice in Roman times. The geographic area that we have like target in this material is the province of Lower Moesia, which includes the territory between Danube and Black Sea (Romanian Dobrodja) and northern Bulgaria. In the present study we present nine ancient medical instruments, from a private collection: two tweezers, two ear probes, a probe-spatula, a probe-spoon, a spoon for pharmacy and two fragments of some kind of hooks used in surgical operations. Most likely, we have a mixed medical kit with tools used in general medicine, surgery, in preparation of the pharmaceutical treatments, but very possible, also, in cosmetic practices. Publication of these archaeological materials is, in addition to an extra page in the history of ancient medicine, a pretext for stepping up in a research field that, in other regions of the former Roman Empire, it is a great interest for researchers.

  18. Laser thermal probe recanalization of occluded arteries.

    Science.gov (United States)

    White, R A; White, G H

    1989-04-01

    Applications of laser energy for treatment of vascular disease have recently received much attention; metal-tipped laser probes are being investigated as a device for recanalization of occluded arteries, especially as an adjunct to balloon dilatation. Developments in instrumentation and techniques have reduced the incidence of complications, notably perforation, to an acceptable level. Initial data show that recanalization of iliac, femoral, and popliteal lesions can be accomplished in a majority of cases, with the chance of success being inversely proportional to the length of occlusion. Results in the tibial vessels are disappointing. Patency of the treated vessels at 12 months appears to be superior to that of percutaneous transluminal angioplasty for similar lesions but inferior to that of surgical bypass for all occlusions greater than 3 cm in length.

  19. Back to Basics: Instrument Cleaning.

    Science.gov (United States)

    Spruce, Lisa

    2017-03-01

    Adequately cleaning and processing surgical instruments may be challenging for perioperative team members; however, the cleaning and processing of instruments are critical steps in making instruments safe to use on patients and achieving an appropriately safe OR environment. Instruments that are cleaned properly have had organic debris and soil removed, rendering them ready for sterilization or disinfection. This Back to Basics article covers the basic steps and considerations for cleaning and processing instruments before sterilization. Copyright © 2017 AORN, Inc. Published by Elsevier Inc. All rights reserved.

  20. 49 CFR 572.77 - Instrumentation.

    Science.gov (United States)

    2010-10-01

    ... Instrumentation. (a)(1) Test probe. For the head, thorax, and knee impact test, use a test probe that is rigid, of... thorax assembly may be instrumented either with a Type A or Type B accelerometer. (i) Type A...) Limb joints. Set the limb joints at lg, barely restraining the limb's weight when the limb is extended...

  1. 外来手术器械全程质量管理在消毒供应中心医院感染控制中的应用%Application of total quality management of foreign surgical instruments in nosocomial infection control in the sterilization and supply center

    Institute of Scientific and Technical Information of China (English)

    焦丽玲; 耿汇涓; 刘根生

    2012-01-01

    Objective To investigate the effect of total quality management of foreign surgical instruments in nosocomial infection control in the sterilization and supply center. Methods The effect before and after the application of total quality management for foreign surgical instruments in the control of nosocomial infection in the sterilization and supply center was comparatively analyzed. Results The results showed that after the application of total quality management for foreign surgical instruments,the onetime passing rate of sterilization and limits of microbial detection of surgical instruments increased significantly compared with that before application.The passing rate after application was significantly higher than before.The difference was significant.The implementation rate of planed surgery depending on foreign surgical instruments was 98.3%,the rate was 92.4% before application.There was a significant difference before and after application,the nosocomial infection rate after surgery depending on foreign surgical instruments was 0.88%,before the application was 6.50%,there was a significant difference before and after application. Conclusions Application of total quality management of foreign surgical instruments can significantly improve the efficiency of the use of foreign equipment and working efficiency of the operation room,reduce costs and the incidence of nosocomial infection significantly.It should be applied in the management of foreign surgical instruments in the sterilization and supply center.%目的 探讨全程质量管理用于消毒供应中心外来手术器械管理控制医院感染(简称院感)中的效果.方法 对比分析消毒供应中心将全程质量管理理念引入对外来手术器械管理以控制院感前后的效果,综合评价全程质量管理在控制外来手术器械引发院感方面的作用.结果 结果显示,对外来手术器械实施全程质量管理后,外来手术器械无菌或微生物限度

  2. Development of Instrumentation for Research Probes.

    Science.gov (United States)

    1981-07-31

    Coding. .. ................ ......... 109 5.2 Vjx30 PAM Commutator ... .................... 109 5.3 Preflight Telemetry Calibrator .. ............... 112... Calibrator ................ 113 20 Console Preflight Cal Control. ................ 115 21 S-Band Sonde Details ..................... 120 22 KIM-1/KIM-4...for the launch of the mass specto - meter "Cluster Ion" series, A08.708-1 and -2. The -1 payload was successfully launched on 15 September 1978, and

  3. Radioisotope instruments

    CERN Document Server

    Cameron, J F; Silverleaf, D J

    1971-01-01

    International Series of Monographs in Nuclear Energy, Volume 107: Radioisotope Instruments, Part 1 focuses on the design and applications of instruments based on the radiation released by radioactive substances. The book first offers information on the physical basis of radioisotope instruments; technical and economic advantages of radioisotope instruments; and radiation hazard. The manuscript then discusses commercial radioisotope instruments, including radiation sources and detectors, computing and control units, and measuring heads. The text describes the applications of radioisotop

  4. pH环境改变对手术器械氧化损伤的观察及控制%Variance in pH environment to oxidation damage of surgical instruments

    Institute of Scientific and Technical Information of China (English)

    宋敏; 胡珊珊; 王平; 贾凤琴

    2011-01-01

    目的 探讨pH环境的改变对手术器械氧化损伤及控制方法,达到手术器械清洁质量稳定、清洁效率提高、物资损耗降低.方法 A组:分别测试清水、健之素泡腾片、蓝鹰牌消毒粉、碱性清洗剂、医用除锈剂稀释液的pH值,然后将新手术刀片放入各组溶液中,观察手术刀片氧化开始时间;B组:分别在不同时间段观察手术刀片在各组的氧化及干沽血污止血钳去污情况;C组:预冲洗后的血污止血钳,分别采用清水冲洗后沥干、清水浸泡、蓝鹰牌消毒粉稀释液浸泡3种方式存放血污止血钳,观察各组存放18 h的隐血试验及存放48 h的细菌监测.结果 A组:清水、健之素、除锈剂稀释液pH值为中性偏酸和酸性,浸泡手术刀片5 min~1 h开始出现氧化,而蓝鹰牌消毒粉稀释液pH值为10~11,浸泡手术刀片30 d均未出现氧化反应;B组:pH值为10~11的蓝鹰牌消毒粉稀释液,既抗氧化又去污;C组:与干放和清水浸泡比较,蓝鹰牌消毒粉稀释液浸泡血污止血钳无论是存放18 h的隐血试验还是存放48 h的细菌监测,其合格率均为100.0%.结论血污手术器械在pH值为中性偏酸和酸性时,氧化活性强烈;而血污手术器械在碱性剂-蓝鹰牌消毒粉稀释液中,几乎无氧化活性,且其去污效果与浸泡时间成正比;对于不能及时回收或需要在临床科室过夜的部分体液、血液污染器械,选择有防锈、去污、消毒3种功效的蓝鹰牌消毒粉稀释液,作为临床科室初步的预清洁,能达到手术器械清洁质量稳定、清洁效率提高、物资损耗降低.%OBJECTIVE To study the controlling method of the surgical instruments' oxidation damage by changing the solvent pH value. METHODS Group A:Test the pH value of the water, Jian Zhi Shu, disinfectant solvent with brand of Lan Ying, alkaline solvent and medical rust remover solvent respectively, put new surgical blades into the above solvents and observed

  5. Surgical Navigation

    DEFF Research Database (Denmark)

    Azarmehr, Iman; Stokbro, Kasper; Bell, R. Bryan

    2017-01-01

    were identified in the field of traumatology. Treatment of complex orbital fractures was considerably improved by the use of SN compared with traditionally treated control groups. Conclusions: SN seems to be a very promising addition to the surgical toolkit. Planning details of the surgical procedure...... in a 3-dimensional virtual environment and execution with real-time guidance can significantly improve precision. Among factors to be considered are the financial investments necessary and the learning curve....

  6. Atom probe tomography today

    OpenAIRE

    Alfred Cerezo; Peter H. Clifton; Mark J. Galtrey; Humphreys, Colin J.; Kelly, Thomas. F.; David J. Larson; Sergio Lozano-Perez; Marquis, Emmanuelle A.; Oliver, Rachel A.; Gang Sha; Keith Thompson; Mathijs Zandbergen; Roger L. Alvis

    2007-01-01

    This review aims to describe and illustrate the advances in the application of atom probe tomography that have been made possible by recent developments, particularly in specimen preparation techniques (using dual-beam focused-ion beam instruments) but also of the more routine use of laser pulsing. The combination of these two developments now permits atomic-scale investigation of site-specific regions within engineering alloys (e.g. at grain boundaries and in the vicinity of cracks) and also...

  7. Gravity Probe B:. Launch and Initialization

    Science.gov (United States)

    Keiser, G. M.; Bencze, W. J.; Brumley, R. W.; Buchman, S.; Clarke, B.; Debra, D.; Everitt, C. W. F.; Green, G.; Heifetz, M. I.; Hipkins, D. N.; Holmes, T.; Li, J.; Mester, J.; Muhlfelder, B.; Murray, D.; Ohshima, Y.; Parkinson, B. W.; Salomon, M.; Santiago, D.; Shestople, P.; Silbergleit, A. S.; Solomonik, V.; Taber, M.; Turneaure, J. P.

    2005-04-01

    The scientific instrument and the major subsystems of the Gravity Probe B satellite are described. Following launch, the initial on-orbit operations were designed to check the operations of each of these major subsystems, provide an initial on-orbit calibration of the scientific instrument, set up the instrument in its operational mode, and spin up and align each of the four gyroscopes.

  8. Probe Storage

    NARCIS (Netherlands)

    Gemelli, Marcellino; Abelmann, Leon; Engelen, Johan B.C.; Khatib, Mohammed G.; Koelmans, Wabe W.; Zaboronski, Olog; Campardo, Giovanni; Tiziani, Federico; Laculo, Massimo

    2011-01-01

    This chapter gives an overview of probe-based data storage research over the last three decades, encompassing all aspects of a probe recording system. Following the division found in all mechanically addressed storage systems, the different subsystems (media, read/write heads, positioning, data chan

  9. Cultural probes

    DEFF Research Database (Denmark)

    Madsen, Jacob Østergaard

    2016-01-01

    The aim of this study was thus to explore cultural probes (Gaver, Boucher et al. 2004), as a possible methodical approach, supporting knowledge production on situated and contextual aspects of occupation.......The aim of this study was thus to explore cultural probes (Gaver, Boucher et al. 2004), as a possible methodical approach, supporting knowledge production on situated and contextual aspects of occupation....

  10. Instruments for subsurface monitoring of geothermal subsidence

    Energy Technology Data Exchange (ETDEWEB)

    O' Rourke, J.E.; Ranson, B.B.

    1979-07-01

    The requirements for a subsurface geothermal subsidence instrument were reviewed. Available instruments for monitoring subsurface displacements, both vertical and horizontal, were studied and the most capable instruments identified. Techniques and materials for improving existing or developing new instruments were evaluated. Elements of sensor and signal technology with potential for high temperature monitoring of subsidence were identified. Drawing from these studies, methods to adapt production wells for monitoring were proposed and several new instrumentation systems were conceptually designed. Finally, four instrumentation systems were selected for future development. These systems are: triple sensor induction sensor probe (with casing collar markers); triple sensor gamma ray detector probe (with radioactive markers); triple sensor reed switch probe (with magnet markers); and triple sensor oscillator-type magnet detector probe (with magnet markers). All are designed for use in well casing incorporating slip couplings or bellows sections, although the gamma ray detector probe may also be used in unlined holes. These systems all measure vertical moement. Instruments to measure horizontal displacement due to geothermal subsidence were studied and the required instrument performance was judged to be beyond the state-of-the-art. Thus, no conceptual designs for instruments to monitor horizontal movement are included.

  11. Clinical observation of Coflex interspious instrumentation in the surgical treatment of lumbar degenerative disease%Coflex治疗腰椎退行性疾患的临床疗效分析

    Institute of Scientific and Technical Information of China (English)

    李忠海; 王诗媛; 付强; 王聪; 唐昊; 马辉

    2011-01-01

    [Objective]To treat degenerative lumbar spinal disorders by Coflex interspinous instrumentation and fusion fixation, and evaluate the clinical effect and influence on the adjacent segments.[Methods]Forty -two consecutive patients with one level ( L4、5 ) lumbar degenerative disease treated in our study between June 2007 and June 2009 were included in.They were randomly and evenfly assigned into an experimental group of decompression and interspinous instrumentation with the Coflex system (n = 21 ) and a control group of traditional interbody fusion (n = 21 ).A score of VAS and the Oswestry Disability Index were used to assess clinical outcome preoperatively and postoperatively.All patients experienced flexion/extension radiographs before surgery and at the latest follow - up.ROM was assessed at the index level ( L4、5 ), the cranial/caudal adjacent levels ( L3、4/L5S1 ), and at the lumbar spine from L2 to S1.[Results]All cases were followed up for 24 months averagely.The postoperative VAS and ODI showed a significant postoperative reduction of disability during the whole period of follow - up.There was a signifcant reduction of the global ROM of the lumbar spine ( L2S1 ) and the segmental ROM at the index level ( L4、5 ) in the fusion group, whereas adjacent level ROM did not change signifcantly.In the Coflex group, there was a signifcant improvement of the global ROM of the lumbar spine ( L2S1 ) and the segmental ROM at the index level ( L3、4 ).No signifcant changes of L4、5 and L5S1 were noted.[Conclusion]This study shows that monosegmental posterior interspinous stabilization with the Coflex system demonstrates excellent outcome for improvement in back pain, neurogenic claudication and patient satisfaction in short and mid - term follow - up duration.At present, there is no overwhelming evidence to suggest that the system performs better than traditional fusion as far as the long - term results are concerned.The selection of suitable surgical candidates

  12. Evaluation of the application effect of cleaning packaging of surgical medical apparatus and instruments in sterilization and supply center of hospital%医院消毒供应中心实施手术医疗器械清洗包装的效果评价

    Institute of Scientific and Technical Information of China (English)

    焦丽玲; 刘文红; 赵俊霞

    2012-01-01

    目的 探讨医院消毒供应中心实施手术医疗器械清洗包装的效果.方法 对我院消毒供应中心实施手术医疗器械清洗包装前后的清洗质量一次合格率、包装质量一次合格率、无菌检查一次合格率、院内感染发生率等指标进行比较,综合评价医院消毒供应中心实施手术医疗器械清洗包装的效果.结果 消毒供应中心实施手术医疗器械清洗包装后,手术器械清洗质量检查一次合格率、包装质量一次合格率、无菌检查合格率均较实施前有明显提高,前后比较差异显著;比较实施前后的院内感染发生率,实施后的院内感染率为1.5%,实施前为5.5%,前后比较差异显著.结论 医院消毒供应中心实施手术医疗器械的清洗包装,可有效控制手术器械的清洗质量及包装质量,保证了后续消毒灭菌的彻底性,大大降低了因手术器械质量不过关而导致的院内感染发生率,为患者创造了可靠、值得信赖的医疗环境,取得了良好的社会效益和经济效益,值得推广应用.%Objective To investigate the application effect of cleaning packaging of surgical medical apparatus and instruments in sterilization and supply center of hospital. Methods The first-time qualification rate of cleaning,packaging and sterility test and incidence rate of nosocomial infection before and after the application of cleaning packaging of surgical medical apparatus and instruments in sterilization and supply center of hospital.The application effect was comprehensively evaluated. Results The first-time qualification rate of cleaning,packaging and sterility test after the application of cleaning packaging of surgical medical apparatus and instruments in sterilization and supply center were significantly increased.The incidence rate of nosocomial infection was 1.5% before and 5.5% after the application of cleaning packaging of surgical medical apparatus and instruments,the difference

  13. Instrumentation Facility

    Data.gov (United States)

    Federal Laboratory Consortium — Provides instrumentation support for flight tests of prototype weapons systems using a vast array of airborne sensors, transducers, signal conditioning and encoding...

  14. Endocavity Ultrasound Probe Manipulators.

    Science.gov (United States)

    Stoianovici, Dan; Kim, Chunwoo; Schäfer, Felix; Huang, Chien-Ming; Zuo, Yihe; Petrisor, Doru; Han, Misop

    2013-06-01

    We developed two similar structure manipulators for medical endocavity ultrasound probes with 3 and 4 degrees of freedom (DoF). These robots allow scanning with ultrasound for 3-D imaging and enable robot-assisted image-guided procedures. Both robots use remote center of motion kinematics, characteristic of medical robots. The 4-DoF robot provides unrestricted manipulation of the endocavity probe. With the 3-DoF robot the insertion motion of the probe must be adjusted manually, but the device is simpler and may also be used to manipulate external-body probes. The robots enabled a novel surgical approach of using intraoperative image-based navigation during robot-assisted laparoscopic prostatectomy (RALP), performed with concurrent use of two robotic systems (Tandem, T-RALP). Thus far, a clinical trial for evaluation of safety and feasibility has been performed successfully on 46 patients. This paper describes the architecture and design of the robots, the two prototypes, control features related to safety, preclinical experiments, and the T-RALP procedure.

  15. Estudo anatômico da cóclea para confecção de instrumental para a cirurgia de implante coclear com 2 feixes de eletrodos em cócleas ossificadas Cochlear anatomy study used to design surgical instruments for cochlear implants with two bundles of electrodes in ossified cochleas

    Directory of Open Access Journals (Sweden)

    Mariana Bogar

    2008-04-01

    distances between cochleostomies and ICA in cadaver temporal bones. 2 Design an instrument that can be used in cochlear implant surgery to introduce an implant with two bundles of electrodes. STUDY DESIGN: Experimental prospective. MATERIALS AND METHODS: In 21 temporal bones from cadavers we performed: 1 canal wall down mastoidectomy; 2 cochleostomy in the cochlear basal and middle turns; 3 ICA identification; 4 Length determination between the cochleostomies and the artery. RESULTS: the average distance ± standard deviation obtained for the upper tunnel was of 8.2 ± 1.1 mm and for the lower tunnel it was of 8.1± 1.3 mm. The shortest distance found was of 6.5 mm for the upper tunnel and 6.0 mm for the lower tunnel. CONCLUSION: Despite the values calculated, we concluded that the best value to be considered in creating a surgical instrument are the minimum lengths obtained for each one of the cochlear turns, because this is the safest way to avoid damaging the ICA, that can be fatal.

  16. Effect evaluation of applying two dimensional bar code on quality tracking in the sterilization process of surgical instrument%二维条形码信息管理在手术灭菌器械质量追溯管理中的应用

    Institute of Scientific and Technical Information of China (English)

    梁飞凤; 刘海燕; 李彩婷; 张洁芳

    2013-01-01

      目的探讨应用二维条形码信息管理对手术灭菌器械进行质量追溯的效果。方法将16857件手术灭菌器械分为实验组8356件和对照组8501件,模拟实验组有276件和对照组有288件灭菌器械不合格,实验组使用二维条形码信息管理,对照组采用传统方法对手术灭菌不合格器械质量进行追溯。比较两组器械质量追溯花费时间的差异。结果实验组质量追溯时间短于对照组,两组比较,t=-244.09,t=P<0.001,差异具有统计学意义。结论使用二维条形码信息管理对手术灭菌器械进行质量追溯,不仅能提高工作效率,同时保证手术病人的安全。%Objective To investigate the application of two dimensional bar code on the quality tracking of surgical instrument. Methods Sixty cases of surgical instrument packets without sterilization in sterilization and supply center were selected.The parkets were divided into the observation group and the control group with 30 cases in each group.The observation group was applied two dimensional bar code on the surgical instrument packets.We eraluated the effect of quality tracking according to the using time that started from discorering sterilization items unqualified to tracking to the patient who use this item.The control group was applied traditional methods.Results The quality tracking time of experiment group was significantly shorter than the time of control group. The difference was statistically significant(P<0.001).The staff satisfaction of the observation group was better than that of the control group.The difference was statistically significant(P<0.001).Conclusion Applying two dimensional bar code can improve the work efficiency,the sterilization quality of surgical instrument packet and guarantee the operation safety of patients.

  17. Lessons learned from planetary entry probe missions

    Science.gov (United States)

    Niemann, Hasso; Atreya, Sushil K.; Kasprzak, Wayne

    Probing the atmospheres and surfaces of the planets and their moons with fast moving entry probes has been a very useful and essential technique to obtain in situ or quasi in situ scientific data (ground truth) which could not otherwise be obtained from fly by or orbiter only missions and where balloon, aircraft or lander missions are too complex and too costly. Planetary entry probe missions have been conducted successfully on Venus, Mars, Jupiter and Titan after having been first demonstrated in the Earth's atmosphere. Future planetary missions should also include more entry probe missions back to Venus and to the outer planets. The success of and science returns from past missions, the need for more and unique data, and a continuously advancing technology generate confidence that future missions will be even more successful with respect to science return and technical performance. There are, however, unique challenges associated with entry probe missions and with building instruments for an entry probe, as compared to orbiters, landers, or rovers. Conditions during atmospheric entry are extreme. There are operating time constraints due to the usually short duration of the probe descent, and the instruments experience rapid environmental changes in temperature and pressure. In addition, there are resource limitations, i.e. mass, power, size and bandwidth. Because of the protective heat shield and the high acceleration the probe experiences during entry, the ratio of payload to total probe mass is usually much smaller than in other missions. Finally, the demands on the instrument design are determined in large part by conditions (pressure, temperature, composition) unique to the particular body under study, and as a result, there is no one-size-fits-all instrument for an atmospheric probe. Many of these requirements are more easily met by miniaturizing the probe instrumentation and consequently reducing the required size of the probe. Improved heat shield

  18. Micobatteriological control of diagnostic instrumentation

    Directory of Open Access Journals (Sweden)

    Valeria Olivo

    2010-03-01

    Full Text Available Introduction: In addition to sterility testings for common bacteria, from 2006 on we have introduced in our laboratory sterility tests for mycobacteria on surgical instruments such as bronchoscope and lava-endoscope fluid used for their sterilization as well. Methods: Bronchology and Pneumology SUN departments, doing bronchoscopies, regularly send to our laboratory bronchoscopes washing fluids. Bronchology department also sends liquids used in lavaendoscopes. Our standard protocol consists of liquids inoculation directly on Lowenstein - Jensen (LJ solid ground and on Middlebrook 7H9 liquid medium into Mgit test tubes, both produced by Becton Dickinson, within 42 days (1, 5, 6. Results: When growth of acid-alcohol resistant bacilli was detected, they were identified through probes or Accuprobe bioMérieux Inno- LIPA Mycobacteria by Innogenetics. All positivite results were related to M. Gordonae. As for the liquids examined, we found one positivite result in liquid medium in 2006 and none in 2007. On the contrary, in 2008 and the first 6 months of 2009, we have identified the following positive results: 2008 - 2009 (6m LJ pos TOT 20 C. Lavaendoscope 8 V. 12 FBS We linked the positive findings on equipment with positivity for M. gordonae observed in patients undergoing bronchoscopy. Conclusions: Data analysis indicates within the period 2008-2009 we observed a recurring positivity for M. gordonae on equipment and therefore in some patients. On a careful evaluation, they showed no signs of clinical infection, also considering that this mycobacteria is usually a saprophyte (2, 3, 4. However, the protocol we adopted allowed us to recognize equipment contamination at birth and to urge fellow users to review sterilization protocols.

  19. 21 CFR 882.4725 - Radiofrequency lesion probe.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Radiofrequency lesion probe. 882.4725 Section 882...) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Surgical Devices § 882.4725 Radiofrequency lesion probe. (a) Identification. A radiofrequency lesion probe is a device connected to a radiofrequency (RF...

  20. Evaluating the Relational Coordination instrument

    DEFF Research Database (Denmark)

    Edwards, Kasper; Lundstrøm, Sanne Lykke

    2014-01-01

    and surgical performance. This has prompted the attention of both practitioners and politicians some of who perceive relational coordination as a means to attain better performance. The relational coordination instrument has been validated as a measure of teamwork from the following perspectives: internal...... consistency, interrater agreement and reliability, structural validity, content validity. However as relational coordination is being used as a diagnostics tool it is important to examine further if the instrument can measure changes. Indeed we need to know how precise and sensitive the instrument is when...

  1. Surgical extrusion technique for clinical crown lengthening: report of three cases.

    Science.gov (United States)

    Kim, Chang-Sung; Choi, Seong-Ho; Chai, Jung-Kiu; Kim, Chong-Kwan; Cho, Kyoo-Sung

    2004-10-01

    Although a number of techniques have been proposed for clinical crown lengthening procedures, all have some limitation in terms of function and esthetics. This report presents the clinical and radiographic results of a surgical extrusion technique for clinical crown lengthening. Atraumatic surgical extrusion using a specially designed instrument (Periotome) was performed in three cases in which it was expected that extensive resective osseous surgery would have to be used for crown lengthening. Full-thickness mucoperiosteal flaps were raised both labially and palatally. The tooth was carefully luxated and extruded to the desired position without damaging the marginal bone area or root apex. No rigid splint was applied. Clinical examinations performed for more than 1 year after surgery revealed probing depths crown lengthening; it does not induce functional or esthetic deformities, especially in the anterior region.

  2. 21 CFR 882.4535 - Nonpowered neurosurgical instrument.

    Science.gov (United States)

    2010-04-01

    ... (CONTINUED) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Surgical Devices § 882.4535 Nonpowered neurosurgical instrument. (a) Identification. A nonpowered neurosurgical instrument is a hand instrument or an accessory to a hand instrument used during neurosurgical procedures to cut, hold, or manipulate tissue....

  3. Pneumatic Proboscis Heat Flow Probe Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The heat flow probe directly answers requirements in the topic: S1.11 Lunar Science Instruments and Technology: "Geophysical Measurements: Systems, subsystems, and...

  4. Modeling of a flexible instrument to study its sliding behavior inside a curved endoscope

    NARCIS (Netherlands)

    Khatait, Jitendra; Brouwer, Dannis Michel; Aarts, Ronald G.K.M.; Herder, Justus Laurens

    2013-01-01

    Flexible instruments are increasingly used to carry out surgical procedures. The instrument tip is remotely controlled by the surgeon. The flexibility of the instrument and the friction inside the curved endoscope jeopardize the control of the instrument tip. Characterization of the surgical

  5. Mobile probes

    DEFF Research Database (Denmark)

    2016-01-01

    A project investigating the effectiveness of a collection of online resources for teachers' professional development used mobile probes as a data collection method. Teachers received questions and tasks on their mobile in a dialogic manner while in their everyday context as opposed to in an inter......A project investigating the effectiveness of a collection of online resources for teachers' professional development used mobile probes as a data collection method. Teachers received questions and tasks on their mobile in a dialogic manner while in their everyday context as opposed...... to in an interview. This method provided valuable insight into the contextual use, i.e. how did the online resource transfer to the work practice. However, the research team also found that mobile probes may provide the scaffolding necessary for individual and peer learning at a very local (intra-school) community...... level. This paper is an initial investigation of how the mobile probes process proved to engage teachers in their efforts to improve teaching. It also highlights some of the barriers emerging when applying mobile probes as a scaffold for learning....

  6. Luminescence Instrumentation

    DEFF Research Database (Denmark)

    Jain, Mayank; Bøtter-Jensen, Lars

    2014-01-01

    This chapter gives an introduction to instrumentation for stimulated luminescence studies, with special focus on luminescence dating using the natural dosimeters, quartz and feldspars. The chapter covers basic concepts in luminescence detection, and thermal and optical stimulation, and reference...

  7. Evolution of surgical skills training

    Institute of Scientific and Technical Information of China (English)

    Kurt E Roberts; Robert L Bell; Andrew J Duffy

    2006-01-01

    Surgical training is changing: one hundred years of tradition is being challenged by legal and ethical concerns for patient safety, work hours restrictions, the cost of operating room time, and complications. Surgical simulation and skills training offers an opportunity to teach and practice advanced skills outside of the operating room environment before attempting them on living patients.Simulation training can be as straight forward as using real instruments and video equipment to manipulate simulated "tissue" in a box trainer. More advanced,virtual reality simulators are now available and ready for widespread use. Early systems have demonstrated their effectiveness and discriminative ability. Newer systems enable the development of comprehensive curricula and full procedural simulations.The Accreditation Council of Graduate Medical Education's (ACGME) has mandated the development of novel methods of training and evaluation. Surgical organizations are calling for methods to ensure the maintenance of skills, advance surgical training, and to credential surgeons as technically competent.Simulators in their current form have been demonstrated to improve the operating room performance of surgical residents. Development of standardized training curricula remains an urgent and important agenda, particularly for minimal invasive surgery.An innovative and progressive approach, borrowing experiences from the field of aviation, can provide the foundation for the next century of surgical training,ensuring the quality of the product. As the technology develops, the way we practice will continue to evolve, to the benefit of physicians and patients.

  8. 标识卡与清单盒在供应室手术器械清单管理中的应用%Application of identification card and list box in the inventory management of surgical instruments in the supply room

    Institute of Scientific and Technical Information of China (English)

    陈春蓉; 宋祥金; 杨小丽

    2016-01-01

    目的::探讨标识卡与清单盒在消毒供应中心手术器械清单管理中的应用效果。方法:将传统手术器械清单管理方法作为对照组,而用标识卡与清单盒对手术器械清单管理方法作为观察组,对两种方法的工作效率、找清单所需时间、环境整理时间、工作人员满意度等方面进行比较。结果:观察组找清单及整理清单时间短于对照组(P<0.05),观察组工作人员满意度优于对照组(P<0.05)。结论:标识卡与清单盒的研制在消毒供应中心手术器械清单管理中的应用,可大大减少包装前找手术器械清单的时间,提高了手术器械包装的质量管理和工作效率及工作人员满意度,与传统管理方法相比,有一定优势。%Objective:To explore the application effect of identification card and list box in the inventory management of surgical instruments in the disinfec-tion supply center. Methods:The traditional list management method of surgical instruments was used as the control group. The management method of in-struments by application of identification card and list box was used as the observation group. The working efficiency, time of finding the list, time of finish-ing the environment organization, staff satisfaction and other aspects of the two methods were compared. Results:Time of finding the list and file the list of the observation group was shorter than that of the control group (P<0. 05). The satisfaction degree of the observation group was better than that of the con-trol group (P<0. 05). Conclusion:The application of identification card and list box in the inventory management of surgical instruments in the disinfection supply center can greatly reduce the time of searching the list of instruments before packaging and improve the quality management and efficiency of the sur-gical instruments packaging and the staff’ s satisfaction. Compared with the traditional management methods, there

  9. Atom probe tomography today

    Directory of Open Access Journals (Sweden)

    Alfred Cerezo

    2007-12-01

    Full Text Available This review aims to describe and illustrate the advances in the application of atom probe tomography that have been made possible by recent developments, particularly in specimen preparation techniques (using dual-beam focused-ion beam instruments but also of the more routine use of laser pulsing. The combination of these two developments now permits atomic-scale investigation of site-specific regions within engineering alloys (e.g. at grain boundaries and in the vicinity of cracks and also the atomic-level characterization of interfaces in multilayers, oxide films, and semiconductor materials and devices.

  10. Atom Probe Tomography 2012

    Science.gov (United States)

    Kelly, Thomas F.; Larson, David J.

    2012-08-01

    In the world of tomographic imaging, atom probe tomography (APT) occupies the high-spatial-resolution end of the spectrum. It is highly complementary to electron tomography and is applicable to a wide range of materials. The current state of APT is reviewed. Emphasis is placed on applications and data analysis as they apply to many fields of research and development including metals, semiconductors, ceramics, and organic materials. We also provide a brief review of the history and the instrumentation associated with APT and an assessment of the existing challenges in the field.

  11. Analytical specificity and sensitivity of the APTIMA Combo 2 and APTIMA GC assays for detection of commensal Neisseria species and Neisseria gonorrhoeae on the Gen-Probe Panther instrument.

    Science.gov (United States)

    Golparian, Daniel; Tabrizi, Sepehr N; Unemo, Magnus

    2013-02-01

    Genetic detection of Neisseria gonorrhoeae is replacing culture for increased diagnostic sensitivity. Specificity of several nucleic acid amplification tests is suboptimal. Herein, the Gen-Probe APTIMA Combo 2 and APTIMA GC assays had 100% specificity and 100% sensitivity after confirmatory testing, when testing 298 isolates of nongonococcal Neisseria and related species and 205 gonococcal isolates.

  12. Pollution Probe.

    Science.gov (United States)

    Chant, Donald A.

    This book is written as a statement of concern about pollution by members of Pollution Probe, a citizens' anti-pollution group in Canada. Its purpose is to create public awareness and pressure for the eventual solution to pollution problems. The need for effective government policies to control the population explosion, conserve natural resources,…

  13. Instrumented SSH

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, Scott; Campbell, Scott

    2009-05-27

    NERSC recently undertook a project to access and analyze Secure Shell (SSH) related data. This includes authentication data such as user names and key fingerprints, interactive session data such as keystrokes and responses, and information about noninteractive sessions such as commands executed and files transferred. Historically, this data has been inaccessible with traditional network monitoring techniques, but with a modification to the SSH daemon, this data can be passed directly to intrusion detection systems for analysis. The instrumented version of SSH is now running on all NERSC production systems. This paper describes the project, details about how SSH was instrumented, and the initial results of putting this in production.

  14. Surgical attire and the operating room: role in infection prevention.

    Science.gov (United States)

    Salassa, Tiare E; Swiontkowski, Marc F

    2014-09-01

    ➤ Although there is some evidence that scrubs, masks, and head coverings reduce bacterial counts in the operating room, there is no evidence that these measures reduce the prevalence of surgical site infection.➤ The use of gloves and impervious surgical gowns in the operating room reduces the prevalence of surgical site infection.➤ Operating-room ventilation plays an unclear role in the prevention of surgical site infection.➤ Exposure of fluids and surgical instruments to the operating-room environment can lead to contamination. Room traffic increases levels of bacteria in the operating room, although the role of this contamination in surgical site infection is unclear.

  15. Parallel scanning probe arrays: their applications

    Directory of Open Access Journals (Sweden)

    Chang Liu

    2008-01-01

    Full Text Available Since the invention of the scanning tunneling microscope (STM1 and the atomic force microscope (AFM2, the field of scanning probe microscopy (SPM instruments has grown steadily and has had a profound influence in materials research, chemistry, biology, nanotechnology, and electronics3,4. Today, scanning probe instruments are used for metrology, characterization5, detection6, manipulation7, patterning8,9, and material modification. A wide range of scanning probe applications are available, taking advantage of various modes of tip–substrate interactions, including force, optics10,11, electrochemistry12, electromagnetics, electrostatics, thermal and mass transfer13,14, and vibration15,16.

  16. Active instruments

    DEFF Research Database (Denmark)

    Lim, Miguel Antonio; Ørberg, Jakob Williams

    2017-01-01

    ) show the dynamic nature of policy processes, and (3) consider the search for policy reference points among the different actors. We present rankers in motion, policies in motion, and finally the complex nature of the ranking device that needs to be both a relevant and malleable policy instrument...

  17. Observation on the Efficacy of Air Pressure Instrument Combined with Surgical Debridement for the Treatment of Diabetic Foot Infection%气压治疗仪联合外科清创术治疗糖尿病足感染的疗效观察

    Institute of Scientific and Technical Information of China (English)

    莫建勋; 叶烨; 莫申荣; 唐盛发; 莫剑锋; 莫春荣; 熊红; 杨灵红

    2013-01-01

    [Objective] To explore the efficacy of air pressure instrument combined surgical debridement for the treatment of diabetic foot infection .[Methods] Totally 97 patients with diabetic foot infection were ran-domly divided into observation group( n=52) and control group( n=45) .All patients in two groups received routine blood sugar control ,anti-infection therapy and surgical debridement of wound weekly .The observation group was additionally treated with air pressure instrument at the same time .[Results] The foot ulcer healing rate of observation group was significantly higher than that of control group ( P<0 .05) ,and the regression of foot edema was obviously better than control group ( P <0 .05) .[Conclusion] Air pressure instrument com-bined with surgical debridement for the treatment of diabetic foot can alleviate limb edema and improve the healing rate of diabetic foot infection in patients with diabetes mellitus after debridement effectively .%[目的]探讨气压治疗仪联合外科清创术治疗糖尿病足感染的疗效。[方法]对97例糖尿病足感染患者随机分为观察组(52例)和对照组(45例),两组患者均常规控制血糖、抗感染、每周伤口进行外科清创等处理,观察组同时加用气压治疗仪联合治疗。[结果]观察组足溃疡愈合率显著高于对照组( P <0.05),且足部水肿消退明显优于对照组( P <0.05)。[结论]气压治疗仪联合外科清创术治疗糖尿病足感染能够减轻肢体水肿,有效提高糖尿病患者足部感染清创术后的愈合率。

  18. Einstein Inflationary Probe (EIP)

    Science.gov (United States)

    Hinshaw, Gary

    2004-01-01

    I will discuss plans to develop a concept for the Einstein Inflation Probe: a mission to detect gravity waves from inflation via the unique signature they impart to the cosmic microwave background (CMB) polarization. A sensitive CMB polarization satellite may be the only way to probe physics at the grand-unified theory (GUT) scale, exceeding by 12 orders of magnitude the energies studied at the Large Hadron Collider. A detection of gravity waves would represent a remarkable confirmation of the inflationary paradigm and set the energy scale at which inflation occurred when the universe was a fraction of a second old. Even a strong upper limit to the gravity wave amplitude would be significant, ruling out many common models of inflation, and pointing to inflation occurring at much lower energy, if at all. Measuring gravity waves via the CMB polarization will be challenging. We will undertake a comprehensive study to identify the critical scientific requirements for the mission and their derived instrumental performance requirements. At the core of the study will be an assessment of what is scientifically and experimentally optimal within the scope and purpose of the Einstein Inflation Probe.

  19. Cirugía radioguiada: extirpación de metástasis de un carcinoma papilar de tiroides Probe-guided surgery: metastases of a papillary thyroid carcinoma. Surgical Excision

    Directory of Open Access Journals (Sweden)

    A. R. Kowadlo

    2008-09-01

    Full Text Available Paciente de sexo masculino operado de Carcinoma Papilar Tiroideo (variedad folicular con recurrencia tumoral luego de tiroidectomía, linfadenectomía y Dosis Terapéutica de Iodo 131. Bajo tratamiento con hormonas tiroideas a dosis inhibitorias de TSH, persistencia de valores elevados de Tiroglobulina Plasmática e imágenes detectables en la Ecografía y Resonancia Magnética Nuclear ( RMN. Por la Dosis Terapéutica se sospechaba que las mismas concentrarían radioyodo. Se planificó por lo tanto cirugía radioguiada, según el protocolo del Instituto Gustave Roussy (modificado. Dosis Terapéutica de Iodo 131; al 4º día Rastreo Corporal Total en Cámara Gamma (RCT; al 5º día cirugía con sonda exploradora (gamma probe y a las 48 hs. poscirugía nuevo RCT. El procedimiento fue exitoso, pudiendo extirparse adenopatías metastásicas con la desaparición en el RCT posquirúrgico de las imágenes que fijaban francamente radioyodo en el preoperatorio. Los vlores de Tiroglobulina plasmática descendieron francamente con terapia hormonal de reemplazo, a los sesenta y noventa días postratamiento.A male patient with papillary thyroid cancer -folliculary variety- is chosen to be presented. After thyroidectomy, lymfhadenectomy and therapeutic dose of radioiodine treatments, cancer relapse was observed. After thyrotrophyn supressive therapy with l-thyroxine, a high serum thyroglobulin concentration was observed. The Ultrasonography ( US and Magnetic Resonance (MR images showed visible node structures in the neck. This node structures were probably going to concentrate I-131 as seen in the first whole body scan after therapeutic dose. Therefore a radio-guided surgery was planned as the best choice. (Institute Gustave Roussy protocol. A therapeutic dose of radioiodine (I-131 was given and up to the 4th day a whole body scan was performed. In the 5th day a gamma- probe-guided surgery was performed as well, and localized metastatic foci in the

  20. Optical imaging probes in oncology.

    Science.gov (United States)

    Martelli, Cristina; Lo Dico, Alessia; Diceglie, Cecilia; Lucignani, Giovanni; Ottobrini, Luisa

    2016-07-26

    Cancer is a complex disease, characterized by alteration of different physiological molecular processes and cellular features. Keeping this in mind, the possibility of early identification and detection of specific tumor biomarkers by non-invasive approaches could improve early diagnosis and patient management.Different molecular imaging procedures provide powerful tools for detection and non-invasive characterization of oncological lesions. Clinical studies are mainly based on the use of computed tomography, nuclear-based imaging techniques and magnetic resonance imaging. Preclinical imaging in small animal models entails the use of dedicated instruments, and beyond the already cited imaging techniques, it includes also optical imaging studies. Optical imaging strategies are based on the use of luminescent or fluorescent reporter genes or injectable fluorescent or luminescent probes that provide the possibility to study tumor features even by means of fluorescence and luminescence imaging. Currently, most of these probes are used only in animal models, but the possibility of applying some of them also in the clinics is under evaluation.The importance of tumor imaging, the ease of use of optical imaging instruments, the commercial availability of a wide range of probes as well as the continuous description of newly developed probes, demonstrate the significance of these applications. The aim of this review is providing a complete description of the possible optical imaging procedures available for the non-invasive assessment of tumor features in oncological murine models. In particular, the characteristics of both commercially available and newly developed probes will be outlined and discussed.

  1. Development of an autofluorescent probe for brain cancer: probe characterization thanks to phantom studies

    Science.gov (United States)

    Leh, B.; Charon, Y.; Duval, M.-A.; Lefebvre, F.; Linden, S.; Menard, L.; Siebert, R.

    2010-02-01

    Glioblastoma are brain tumors currently incurable, however, optimized treatment gives better prognosis and quality of life. In case of surgical treatment, there is still need to help surgeons to determine whether a tissue is tumorous or not. Within the framework of the design of a new autofluorescence probe for this issue, optically calibrated gel phantoms have been developed using "tumorous" inclusions in a "healthy" environment. Depending on "tumor" shape, size and localization, the sensitivity of the probe is evaluated. The probe sensitivity for fluorescence spectroscopy will be presented. The probe configuration is also taken into account and compared to simulated results.

  2. Retained Surgical Foreign Bodies after Surgery

    Directory of Open Access Journals (Sweden)

    Valon A. Zejnullahu

    2017-01-01

    Full Text Available The problem of retained surgical bodies (RSB after surgery is an issue for surgeons, hospitals and the entire medical team. They have potentially harmful consequences for the patient as they can be life threatening and usually, a further operation is necessary. The incidence of RSB is between 0.3 to 1.0 per 1,000 abdominal operations, and they occur due to a lack of organisation and communication between surgical staff during the process. Typically, the RSB are surgical sponges and instruments located in the abdomen, retroperitoneum and pelvis.

  3. Dexterity testing and residents' surgical performance.

    Science.gov (United States)

    Kirby, T J

    1979-01-01

    1. With some exceptions, those who choose ophthalmology as a career may approximate the general population in innate manual dexterity. 2. Many factors other than manual dexterity influence the development of surgical skills by residents. 3. If dexterity testing is to be used, the addition or inclusion of tests for spatial aptitudes may be more helpful than simple dexterity tests alone. The predictive value of such tests for surgical performance would need vertification. 4. The development of a special test directly related to handling surgical instruments, to cutting, and to sewing (the criteria) may be more practical than the ones used in this study.

  4. Stereotactic limbic leucotomy: surgical technique

    Science.gov (United States)

    Richardson, Alan

    1973-01-01

    The requirements for modern psychosurgery are safety and accuracy. Stereotactic techniques give the geometric accuracy and stimulation gives physiological information, which is important in determining lesion sites or at least lesion symmetry. The process whereby focal brain destruction is produced is ideally by a freezing probe, but equally effectively by coagulation. A number of small lesions is thus required. This at present is unavoidable if side effects are to be obviated. Careful continuing assessment of results is necessary to validate any surgical procedure. ImagesFig. 1Fig. 2Fig. 3Fig. 4 PMID:4618905

  5. A novel technique to release sticking haptic of a single-piece hydrophobic acrylic IOL using irrigation-aspiration probe.

    Science.gov (United States)

    Khokhar, Sudarshan Kumar; Midha, Neha; Patil, Bharat; Nayak, Bhagabat; Simakurthy, Sriram

    2016-01-01

    To describe a novel technique to release sticking haptic of a single-piece hydrophobic acrylic intraocular lens (IOL) using irrigation-aspiration (I/A) probe. In our technique, the I/A probe is introduced into the anterior chamber on Visco mode. Using the aspiration port of the I/A probe, the sticking haptic is held at its tip and suction force is built up until occlusion is noted. Then the haptic is nudged towards the center of the IOL along its curve. After the haptic is free from optic, the suction is released. Several techniques have been described to release the sticking haptic such as squeezing the haptic at the site where it sticks to the IOL or using Sinskey hook for releasing the adhesion. These techniques require extra manipulation of the IOL by introduction of surgical instruments. In our technique, we used the I/A probe itself for separating the sticky haptic successfully. This technique allows separation of sticking haptic without any extra instrumentation, thus reducing intraocular maneuvering and total surgery time.

  6. Comparação do poder de correção do instrumental de Luque-Galveston e do parafuso pedicular no tratamento cirúrgico da escoliose neuromuscular Comparación del poder de corrección del instrumental de Luque-Galveston y del tornillo pedicular en el tratamiento quirúrgico de la escoliosis neuromuscular Comparison between deformity correction of Luque-Galveston instrumentation and pedicle screw fixation in the surgical treatment of neuromuscular scoliosis

    Directory of Open Access Journals (Sweden)

    Murilo Tavares Daher

    2009-06-01

    (p=0.045. CONCLUSIONS: postoperative major curve correction was similar with pedicle screws and Luque-Galveston instrumentation, but pelvic obliquity correction was greater when pedicle screw was used in the surgical treatment of neuromuscular scoliosis.

  7. An environmental transfer hub for multimodal atom probe tomography

    Energy Technology Data Exchange (ETDEWEB)

    Perea, Daniel E.; Gerstl, Stephan S. A.; Chin, Jackson; Hirschi, Blake; Evans, James. E.

    2017-05-02

    Environmental control during transfer between instruments is required for specimens sensitive to air or thermal exposure to prevent morphological or chemical changes. Atom Probe Tomography is an expanding technique but commercial instruments remain limited to loading under ambient conditions. Here we describe a multifunctional environmental transfer hub allowing controlled cryogenic, atmospheric and vacuum transfer between an Atom Probe and other instruments containing separate chambers to allow downstream time-resolved in-situ studies.

  8. 21 CFR 872.4565 - Dental hand instrument.

    Science.gov (United States)

    2010-04-01

    ... chisel, endodontic broach, dental wax carver, endodontic pulp canal file, hand instrument for calculus... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental hand instrument. 872.4565 Section 872.4565...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4565 Dental hand instrument. (a) Identification....

  9. 21 CFR 882.4275 - Dowel cutting instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dowel cutting instrument. 882.4275 Section 882...) MEDICAL DEVICES NEUROLOGICAL DEVICES Neurological Surgical Devices § 882.4275 Dowel cutting instrument. (a) Identification. A dowel cutting instrument is a device used to cut dowels of bone for bone grafting....

  10. Solar Probe Cup - Demonstrated Laboratory Performance

    Science.gov (United States)

    Case, A. W.; Kasper, J. C.; Korreck, K. E.; Stevens, M. L.; Larson, D. E.; Wright, K. H., Jr.; Gallagher, D. L.; Whittlesey, P. L.

    2016-12-01

    The Solar Probe Cup (SPC) is a Faraday Cup instrument that will fly on the Solar Probe Plus (SPP) spacecraft, orbiting the Sun as close as 9.86 solar radii from the center of the Sun. The SPC instrument is designed to measure the thermal solar wind plasma (protons, alphas, and electrons) that will be encountered throughout its close encounter with the Sun. Due to the solar wind flow being primarily radial, the SPC instrument is pointed directly at the Sun, resulting in an extreme thermal environment that must be tolerated throughout the primary data collection phase. Laboratory testing has been performed over the past 6 months to demonstrate the instrument's performance relative to its requirements, and to characterize the measurements over the expected thermal range. This presentation will demonstrate the performance of the instrument as measured in the lab, describe the operational configurations planned for flight, and discuss the data products that will be created.

  11. Laboratory Instrumentation: An Exploration of the Impact of Instrumentation on Student Learning

    Science.gov (United States)

    Warner, Don L.; Brown, Eric C.; Shadle, Susan E.

    2016-01-01

    Academic programs generally work to make their laboratory curriculum both as instrumentation rich and up to date as possible. However, little is known about the relationship between the use of instrumentation in the curriculum and student learning. As part of our department's ongoing assessment efforts, a project was designed to probe this…

  12. Micro-surgical endodontics.

    Science.gov (United States)

    Eliyas, S; Vere, J; Ali, Z; Harris, I

    2014-02-01

    Non-surgical endodontic retreatment is the treatment of choice for endodontically treated teeth with recurrent or residual disease in the majority of cases. In some cases, surgical endodontic treatment is indicated. Successful micro-surgical endodontic treatment depends on the accuracy of diagnosis, appropriate case selection, the quality of the surgical skills, and the application of the most appropriate haemostatic agents and biomaterials. This article describes the armamentarium and technical procedures involved in performing micro-surgical endodontics to a high standard.

  13. Surgical innovation as sui generis surgical research.

    Science.gov (United States)

    Lotz, Mianna

    2013-12-01

    Successful innovative 'leaps' in surgical technique have the potential to contribute exponentially to surgical advancement, and thereby to improved health outcomes for patients. Such innovative leaps often occur relatively spontaneously, without substantial forethought, planning, or preparation. This feature of surgical innovation raises special challenges for ensuring sufficient evaluation and regulatory oversight of new interventions that have not been the subject of controlled investigatory exploration and review. It is this feature in particular that makes early-stage surgical innovation especially resistant to classification as 'research', with all of the attendant methodological and ethical obligations--of planning, regulation, monitoring, reporting, and publication--associated with such a classification. This paper proposes conceptual and ethical grounds for a restricted definition according to which innovation in surgical technique is classified as a form of sui generis surgical 'research', where the explicit goal of adopting such a definition is to bring about needed improvements in knowledge transfer and thereby benefit current and future patients.

  14. Sushruta: Foundation for Surgical Practice

    Directory of Open Access Journals (Sweden)

    Siddharth P. Dubhashi

    2016-04-01

    Full Text Available Sushruta was an ancient Indian surgeon (600 B.C. who resided in Varanasi.The teachings and work of Sushruta is compiled in a treatise called Sushruta Samhita (Sushruta's compendium, which is believed to be a part of Atharvaveda. It contains 184 chapters, descriptions of 1,120 illnesses, 300 surgical procedures, classification of human surgery in 8 categories, over 120 surgical instruments and around 700 drugs of animal, plant and mineral origin. Sushruta was one of the earliest exponents of surgery as an art and science. Sushruta's principles and teachings took surgery in ancient India to a noteworthy pedestal, making it the Golden Age of Surgery. He is truly the “Father of Surgery” and “Father of Plastic Surgery”. It is extremely essential that we put his principles into practice, and preserve the dignity of our noble profession. That would be the ideal tribute to this legendary figure.

  15. Transanal polypectomy using single incision laparoscopic instruments.

    Science.gov (United States)

    Dardamanis, Dimitrios; Theodorou, Dimitrios; Theodoropoulos, George; Larentzakis, Andreas; Natoudi, Maria; Doulami, Georgia; Zoumpouli, Christina; Markogiannakis, Haridimos; Katsaragakis, Stylianos; Zografos, George C

    2011-04-27

    Transanal excision of rectal polyps with laparoscopic instrumentation and a single incision laparoscopic port is a novel technique that uses technology originally developed for abdominal procedures from the natural orifice of the rectum. Transanal endoscopic microsurgery (TEM) is a well established surgical approach for certain benign or early malignant lesions of the rectum, under specific indications. Our technique is a hybrid technique of transanal surgery, a reasonable method for polyp resection without the need of the sophisticated and expensive instrumentation of TEM which can be applied whenever endoscopic or conventional transanal surgical removal is not feasible.

  16. RHEED streaks and instrument response

    Energy Technology Data Exchange (ETDEWEB)

    Van Hove, J.M.; Pukite, P.; Cohen, P.I.; Lent, C.S.

    1983-04-01

    Reflection high-energy electron diffraction (RHEED) is so sensitive to surface morphology that it is difficult to separate the roles of instrument response and surface imperfection in the diffraction. To address this difficulty we have used MBE grown GaAs(001) as a test surface to study the angular dimensions of the diffracted beams. This is important if RHEED is to be useful as a quantitive probe of surface structure for in situ studies of crystal growth. The limitations placed by instrumental uncertainties on the maximum resolvable distance are estimated. Measurements of the angular length of the RHEED steaks versus angle of incidence are presented which show the changes expected from a combination of a uniformly broadened reciprocal lattice rod and an instrument limit due to angular uncertainties. Resolvable distances are obtained with RHEED that are much larger than those typically obtained with low-energy electron diffraction.

  17. Chemical Address Tags of Fluorescent Bioimaging Probes

    OpenAIRE

    Shedden, Kerby; Rosania, Gus R.

    2010-01-01

    Chemical address tags can be defined as specific structural features shared by a set of bioimaging probes having a predictable influence on cell-associated visual signals obtained from these probes. Here, using a large image dataset acquired with a high content screening instrument, machine vision and cheminformatics analysis have been applied to reveal chemical address tags. With a combinatorial library of fluorescent molecules, fluorescence signal intensity, spectral, and spatial features c...

  18. Building a framework for ergonomic research on laparoscopic instrument handles.

    Science.gov (United States)

    Li, Zheng; Wang, Guohui; Tan, Juan; Sun, Xulong; Lin, Hao; Zhu, Shaihong

    2016-06-01

    Laparoscopic surgery carries the advantage of minimal invasiveness, but ergonomic design of the instruments used has progressed slowly. Previous studies have demonstrated that the handle of laparoscopic instruments is vital for both surgical performance and surgeon's health. This review provides an overview of the sub-discipline of handle ergonomics, including an evaluation framework, objective and subjective assessment systems, data collection and statistical analyses. Furthermore, a framework for ergonomic research on laparoscopic instrument handles is proposed to standardize work on instrument design.

  19. Optical Instruments

    Science.gov (United States)

    1990-01-01

    Precision Lapping and Optical Co. has developed a wide variety of hollow retroreflector systems for applications involving the entire optical spectrum; they are, according to company literature, cheaper, more accurate, lighter and capable of greater size than solid prisms. Precision Lapping's major customers are aerospace and defense companies, government organizations, R&D and commercial instrument companies. For example, Precision Lapping supplies hollow retroreflectors for the laser fire control system of the Army's Abrams tank, and retroreflectors have been and are being used in a number of space tests relative to the Air Force's Strategic Defense Initiative research program. An example of a customer/user is Chesapeake Laser Systems, producer of the Laser Tracker System CMS-2000, which has applications in SDI research and industrial robotics. Another customer is MDA Scientific, Inc., manufacturer of a line of toxic gas detection systems used to monitor hazardous gases present in oil fields, refineries, offshore platforms, chemical plants, waste storage sites and other locations where gases are released into the environment.

  20. A subcutaneous channeling probe for implanting long leads

    Science.gov (United States)

    Lund, G. F.; Simmonds, R. C.; Williams, B. A.

    1977-01-01

    The channeling probe described in the present paper was designed to overcome surgical problems of the type that were encountered when a multichannel radio transmitter had to be implanted in a cow. The probe was made of a flexible but sufficiently stiff 9.5-mm-diam nylon rod, consisting of 46-cm sections for convenience in sterilization and surgical handling. Stainless steel sleaves reinforced the threaded connecting joints. At one end, arrowhead-shaped channeling heads could be attached to produce wide channels for large sensors. The other end was tapered for narrow channels. Postoperative problems were not encountered in the use of this probe in cows, sheep, and dogs.

  1. Applying neural networks to optimize instrumentation performance

    Energy Technology Data Exchange (ETDEWEB)

    Start, S.E.; Peters, G.G.

    1995-06-01

    Well calibrated instrumentation is essential in providing meaningful information about the status of a plant. Signals from plant instrumentation frequently have inherent non-linearities, may be affected by environmental conditions and can therefore cause calibration difficulties for the people who maintain them. Two neural network approaches are described in this paper for improving the accuracy of a non-linear, temperature sensitive level probe ised in Expermental Breeder Reactor II (EBR-II) that was difficult to calibrate.

  2. Hernia Surgical Mesh Implants

    Science.gov (United States)

    ... Prosthetics Hernia Surgical Mesh Implants Hernia Surgical Mesh Implants Share Tweet Linkedin Pin it More sharing options ... majority of tissue used to produce these mesh implants are from a pig (porcine) or cow (bovine) ...

  3. Urogynecologic Surgical Mesh Implants

    Science.gov (United States)

    ... Prosthetics Urogynecologic Surgical Mesh Implants Urogynecologic Surgical Mesh Implants Share Tweet Linkedin Pin it More sharing options ... majority of tissue used to produce these mesh implants are from a pig (porcine) or cow (bovine). ...

  4. American Pediatric Surgical Association

    Science.gov (United States)

    American Pediatric Surgical Association Search for: Login Resources + For Members For Professionals For Training Program Directors For Media For ... Surgical Outcomes Surveys & Results Publications Continuing Education + ExPERT Pediatric Surgery NaT Annual Meeting CME MOC Requirements Residents / ...

  5. Optimizing surgical f

    Directory of Open Access Journals (Sweden)

    Sabry Mohamed Amin

    2016-07-01

    Conclusions: In our study both dexmedetomidine and esmolol were effective in reducing MABP, and lowering the heart rate providing dry surgical field and ensured good surgical condition during cochlear implant surgery in pediatric patients.

  6. Abortion - surgical - aftercare

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/patientinstructions/000658.htm Abortion - surgical - aftercare To use the sharing features on ... please enable JavaScript. You have had a surgical abortion. This is a procedure that ends pregnancy by ...

  7. NASA SMART Probe: Breast Cancer Application

    Science.gov (United States)

    Mah, Robert W.; Norvig, Peter (Technical Monitor)

    2000-01-01

    There is evidence in breast cancer and other malignancies that the physiologic environment within a tumor correlates with clinical outcome. We are developing a unique percutaneous Smart Probe to be used at the time of needle biopsy of the breast. The Smart Probe will simultaneously measure multiple physiologic parameters within a breast tumor. Direct and indirect measurements of tissue oxygen levels, blood flow, pH, and tissue fluid pressure will be analyzed in real-time. These parameters will be interpreted individually and collectively by innovative neural network techniques using advanced intelligent software. The goals are 1) develop a pecutaneous Smart Probe with multiple sensor modalities and applying advanced Information Technologies to provide real time diagnostic information of the tissue at tip of the probe, 2) test the percutaneous Smart Probe in women with benign and malignant breast masses who will be undergoing surgical biopsy, 3) correlate probe sensor data with benign and malignant status of breast masses, 4) determine whether the probe can detect physiologic differences within a breast tumor, and its margins, and in adjacent normal breast tissue, 5) correlate probe sensor data with known prognostic factors for breast caner, including tumor size, tumor grade, axillary lymph node metastases, estrogen receptor and progesterone receptor status.

  8. Survey of the Frequency Dependent Latitudinal Distribution of the Fast Magnetosonic Wave Mode from Van Allen Probes Electric and Magnetic Field Instrument and Integrated Science Waveform Receiver Plasma Wave Analysis

    Science.gov (United States)

    Boardsen, Scott A.; Hospodarsky, George B.; Kletzing, Craig A.; Engebretson, Mark J.; Pfaff, Robert F.; Wygant, John R.; Kurth, William S.; Averkamp, Terrance F.; Bounds, Scott R.; Green, Jim L.; hide

    2016-01-01

    We present a statistical survey of the latitudinal structure of the fast magnetosonic wave mode detected by the Van Allen Probes spanning the time interval of 21 September 2012 to 1 August 2014. We show that statistically, the latitudinal occurrence of the wave frequency (f) normalized by the local proton cyclotron frequency (f(sub cP)) has a distinct funnel-shaped appearance in latitude about the magnetic equator similar to that found in case studies. By comparing the observed E/B ratios with the model E/B ratio, using the observed plasma density and background magnetic field magnitude as input to the model E/B ratio, we show that this mode is consistent with the extra-ordinary (whistler) mode at wave normal angles (theta(sub k)) near 90 deg. Performing polarization analysis on synthetic waveforms composed from a superposition of extra-ordinary mode plane waves with theta(sub k) randomly chosen between 87 and 90 deg, we show that the uncertainty in the derived wave normal is substantially broadened, with a tail extending down to theta(sub k) of 60 deg, suggesting that another approach is necessary to estimate the true distribution of theta(sub k). We find that the histograms of the synthetically derived ellipticities and theta(sub k) are consistent with the observations of ellipticities and theta(sub k) derived using polarization analysis.We make estimates of the median equatorial theta(sub k) by comparing observed and model ray tracing frequency-dependent probability occurrence with latitude and give preliminary frequency dependent estimates of the equatorial theta(sub k) distribution around noon and 4 R(sub E), with the median of approximately 4 to 7 deg from 90 deg at f/f(sub cP) = 2 and dropping to approximately 0.5 deg from 90 deg at f/f(sub cP) = 30. The occurrence of waves in this mode peaks around noon near the equator at all radial distances, and we find that the overall intensity of these waves increases with AE*, similar to findings of other studies.

  9. Proximal Probes Facility

    Data.gov (United States)

    Federal Laboratory Consortium — The Proximal Probes Facility consists of laboratories for microscopy, spectroscopy, and probing of nanostructured materials and their functional properties. At the...

  10. Comparison in the cleaning efficacy of surgical instruments by solid deter-gent and multi-enzymatic detergent%固体清洗剂和多酶清洗剂清洗手术器械的效果比较

    Institute of Scientific and Technical Information of China (English)

    傅珺; 沈蓉蓉; 胡仕翔

    2014-01-01

    Objective To compare the cleaning efficacy of surgical instruments by solid detergent and Liguid multi-enzymatic detergent,and conduct cost-effectiveness analysis,so as to provide new cleaning technique for central sterile supply department(CSSD).Methods Four washer-disinfectors in CSSD were randomly divided into experi-mental and control group,experimental group adopted new solid detergent for cleaning surgical instruments,control group used liquid enzymatic detergent.Cleaning efficacy of two groups were evaluated by visual observation(naked syesight and 10 ×magnifier with light),ATP bioluminescence assay and residual protein test.Cleaning cost and medical waste generated by different detergents during the same period were analyzed statistically.Results Qualified rate of cleaning observed by naked syesight was 97.70% (4 678/4 788)in experimental group and 92.01%(5 075/5 516) in control group;qualified rate of cleaning observed by 10×magnifier with light was 94.30%(2 546/2 700)in experimen-tal group and 88.72%(2 453/2 765)in control group ;qualified rate in experimental group were both higher than in con-trol group (P =0.000).ATP bioluminescence assay showed that qualified rate of cleaning of experimental group and control group was 84.41%(996/ 1 180)and 86.83%(1 042/1 200)respectively,there was no statistical difference between two groups(P =0.092).Residual protein test positive of experimental group and control group was 3.71% (26/700)and 16.31%(106/650))respectively,experimental group was lower than control group (P =0.000).Cleaning cost of experi-mental group was 2/3 of control group;medical waste produced in experimental group (plastic film)and control group (empty barrel)was 0.40kg and 12.30kg respectively.Conclusion Solid detergent cleaning can efficiently eliminate the protein soil on surgical instruments,reduce cleaning cost and production of medical waste,it is a novel technology applied to surgical instrument cleaning.%目的:比较固体清洗剂

  11. Probe tip heating assembly

    Science.gov (United States)

    Schmitz, Roger William; Oh, Yunje

    2016-10-25

    A heating assembly configured for use in mechanical testing at a scale of microns or less. The heating assembly includes a probe tip assembly configured for coupling with a transducer of the mechanical testing system. The probe tip assembly includes a probe tip heater system having a heating element, a probe tip coupled with the probe tip heater system, and a heater socket assembly. The heater socket assembly, in one example, includes a yoke and a heater interface that form a socket within the heater socket assembly. The probe tip heater system, coupled with the probe tip, is slidably received and clamped within the socket.

  12. Modeling of tool-tissue interactions for computer-based surgical simulation: a literature review

    NARCIS (Netherlands)

    Misra, Sarthak; Ramesh, K.T.; Okamura, Allison M.

    2008-01-01

    Surgical simulators present a safe and potentially effective method for surgical training, and can also be used in robot-assisted surgery for pre- and intra-operative planning. Accurate modeling of the interaction between surgical instruments and organs has been recognized as a key requirement in th

  13. Surgical management of cervical spondylotic myelopathy

    Directory of Open Access Journals (Sweden)

    N Muthukumar

    2012-01-01

    Full Text Available Cervical spondylotic myelopathy (CSM is emerging as the most common cause of spinal cord dysfunction in the elderly worldwide. In the past decade, our understanding of the biomechanics of the spine has improved along with advances in spinal instrumentation and this has led to significant changes in the surgical management of CSM. This review will discuss the indications, advantages and limitations of different operative approaches as well as the complications and prognosis of surgery for cervical spondylotic myelopathy. Choice of surgical approach for CSM should be based on the clinical and radiological characteristics of the individual patient and not on the preferences of the surgeon.

  14. Instrument repair for remote eye units

    Directory of Open Access Journals (Sweden)

    Sam Powdrill

    2004-10-01

    Full Text Available Many skilled eye surgeons in remote hospitals face the frustration that a simple instrument, once in good working order, is now bent or broken. Many eye units have a box containing instruments needing repair, hidden away in a stock room cupboard, in the hope that someone, someday, will be able to redeem them. This article gives guidelines on: 1 How to assess instruments and identify those that can be repaired locally, those that should be sent to a professional repair service and those that cannot be repaired at all. 2 How to make adjustments and carry out basic maintenance and repairs of surgical instruments. The article will refer primarily to instruments in an extracapsular cataract extraction set.

  15. Application of Advanced Manufacturing Techniques to Forged Surgical Instruments.

    Science.gov (United States)

    1987-08-01

    PR Cameron Station Alexandria, ’i,’ 2304-610( A Contract DLA 900.-34-C-1508 Approved for public rele ; "etriLbutlon Unlimited A Department of Defense...respect to this program, ASTMI F921 "Standard Definition of Terms Relatino to Hemostatic Forceps" notes "...that the box lock construction defined in

  16. Cost assessment of instruments for single-incision laparoscopic cholecystectomy

    DEFF Research Database (Denmark)

    Henriksen, Nadia A; Al-Tayar, Haytham; Rosenberg, Jacob;

    2012-01-01

    Specially designed surgical instruments have been developed for single-incision laparoscopic surgery, but high instrument costs may impede the implementation of these procedures. The aim of this study was to compare the cost of operative implements used for elective cholecystectomy performed...... as conventional laparoscopic 4-port cholecystectomy or as single-incision laparoscopic cholecystectomy....

  17. Surgical Placement of Catheters for Long-term Cardiovascular Exercise Testing in Swine.

    Science.gov (United States)

    De Wijs-Meijler, Daphne P M; Stam, Kelly; van Duin, Richard W B; Verzijl, Annemarie; Reiss, Irwin K; Duncker, Dirk J; Merkus, Daphne

    2016-02-09

    This protocol describes the surgical procedure to chronically instrument swine and the procedure to exercise swine on a motor-driven treadmill. Early cardiopulmonary dysfunction is difficult to diagnose, particularly in animal models, as cardiopulmonary function is often measured invasively, requiring anesthesia. As many anesthetic agents are cardiodepressive, subtle changes in cardiovascular function may be masked. In contrast, chronic instrumentation allows for measurement of cardiopulmonary function in the awake state, so that measurements can be obtained under quiet resting conditions, without the effects of anesthesia and acute surgical trauma. Furthermore, when animals are properly trained, measurements can also be obtained during graded treadmill exercise. Flow probes are placed around the aorta or pulmonary artery for measurement of cardiac output and around the left anterior descending coronary artery for measurement of coronary blood flow. Fluid-filled catheters are implanted in the aorta, pulmonary artery, left atrium, left ventricle and right ventricle for pressure measurement and blood sampling. In addition, a 20 G catheter is positioned in the anterior interventricular vein to allow coronary venous blood sampling. After a week of recovery, swine are placed on a motor-driven treadmill, the catheters are connected to pressure and flow meters, and swine are subjected to a five-stage progressive exercise protocol, with each stage lasting 3 min. Hemodynamic signals are continuously recorded and blood samples are taken during the last 30 sec of each exercise stage. The major advantage of studying chronically instrumented animals is that it allows serial assessment of cardiopulmonary function, not only at rest but also during physical stress such as exercise. Moreover, cardiopulmonary function can be assessed repeatedly during disease development and during chronic treatment, thereby increasing statistical power and hence limiting the number of animals

  18. Transient Astrophysics Probe

    Science.gov (United States)

    Camp, Jordan

    2017-08-01

    Transient Astrophysics Probe (TAP), selected by NASA for a funded Concept Study, is a wide-field high-energy transient mission proposed for flight starting in the late 2020s. TAP’s main science goals, called out as Frontier Discovery areas in the 2010 Decadal Survey, are time-domain astrophysics and counterparts of gravitational wave (GW) detections. The mission instruments include unique imaging soft X-ray optics that allow ~500 deg2 FoV in each of four separate modules; a high sensitivity, 1 deg2 FoV soft X-ray telescope based on single crystal silicon optics; a passively cooled, 1 deg2 FoV Infrared telescope with bandpass 0.6-3 micron; and a set of ~8 small NaI gamma-ray detectors. TAP will observe many events per year of X-ray transients related to compact objects, including tidal disruptions of stars, supernova shock breakouts, neutron star bursts and superbursts, and high redshift Gamma-Ray Bursts. Perhaps most exciting is TAP’s capability to observe X-ray and IR counterparts of GWs involving stellar mass black holes detected by LIGO/Virgo, and possibly X-ray counterparts of GWs from supermassive black holes, detected by LISA and Pulsar Timing Arrays.

  19. Evaluating musical instruments

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, D. Murray

    2014-04-01

    Scientific measurements of sound generation and radiation by musical instruments are surprisingly hard to correlate with the subtle and complex judgments of instrumental quality made by expert musicians.

  20. ATRAUMATIC SURGICAL EXTRUSION OF COMPLETE CROWN FRACTURED TOOTH USING PERIOTOME IN ESTHETIC ZONE: REPORT OF THREE CASES

    Directory of Open Access Journals (Sweden)

    Prashant

    2014-06-01

    Full Text Available BACKGROUND: Restoring traumatically injured teeth is a clinical challenge and often requires a multidisciplinary approach for predictable esthetic outcome. Although a number of techniques have been proposed for clinical crown lengthening procedures, all have some limitations in terms of function and esthetic. AIM: This report presents the clinical and radiographic results of surgical extrusion technique for clinical crown lengthening. MATERIAL & METHODS: Atraumatic surgical extrusion using a specially designed instrument (Periotome was performed in three cases in which it was expected that extensive respective osseous surgery would have to be used for crown lengthening. After luxation the teeth were extruded to the desired position and stabilized with sutures without rigid splinting. Two months after stabilization the teeth were treated by root canal treatment and firmly restored after 4months. RESULTS: Clinical examination performed after 6 months revealed probing depth ≤3mm around the teeth at all sites without bleeding on probing. Radiographs showed normal periodontal contour with new bone formation in periapical region without any evidence of root or crestal bone resorption or endodontic problems. CONCLUSION: The outcome of the treatment within a short duration has very good results without any esthetic and functional deformities.

  1. Optically Powered Temperature Measuring Instrument for Big Rotor①

    Institute of Scientific and Technical Information of China (English)

    ZHENGDezhong

    1997-01-01

    A micro-power consumption non-contact temperature measuring instrument for big rotos is introduced.As it solver very well the signal coupling under high speed rotation and power supply problem for probe,the instrument can realize persistent on-line temperature measurement for big rotor drived by the ordinary light transmitted by optical fiber under the room light.

  2. Mobile Game Probes

    DEFF Research Database (Denmark)

    Borup Lynggaard, Aviaja

    2006-01-01

    This paper will examine how probes can be useful for game designers in the preliminary phases of a design process. The work is based upon a case study concerning pervasive mobile phone games where Mobile Game Probes have emerged from the project. The new probes are aimed towards a specific target...... group and the goal is to specify the probes so they will cover the most relevant areas for our project. The Mobile Game Probes generated many interesting results and new issues occurred, since the probes came to be dynamic and favorable for the process in new ways....

  3. Phoenix Conductivity Probe Inserted into Martian Soil

    Science.gov (United States)

    2008-01-01

    NASA's Phoenix Mars Lander inserted the four needles of its thermal and conductivity probe into Martian soil during the 98th Martian day, or sol, of the mission and left it in place until Sol 99 (Sept. 4, 2008). The Robotic Arm Camera on Phoenix took this image on the morning of Sol 99 while the probe's needles were in the ground. The science team informally named this soil target 'Gandalf.' The thermal and conductivity probe measures how fast heat and electricity move from one needle to an adjacent one through the soil or air between the needles. Conductivity readings can be indicators about water vapor, water ice and liquid water. The probe is part of Phoenix's Microscopy, Electrochemistry and Conductivity suite of instruments. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  4. Surface sampling concentration and reaction probe

    Science.gov (United States)

    Van Berkel, Gary J; Elnaggar, Mariam S

    2013-07-16

    A method of analyzing a chemical composition of a specimen is described. The method can include providing a probe comprising an outer capillary tube and an inner capillary tube disposed co-axially within the outer capillary tube, where the inner and outer capillary tubes define a solvent capillary and a sampling capillary in fluid communication with one another at a distal end of the probe; contacting a target site on a surface of a specimen with a solvent in fluid communication with the probe; maintaining a plug volume proximate a solvent-specimen interface, wherein the plug volume is in fluid communication with the probe; draining plug sampling fluid from the plug volume through the sampling capillary; and analyzing a chemical composition of the plug sampling fluid with an analytical instrument. A system for performing the method is also described.

  5. Computer-Assisted Technique for Surgical Tooth Extraction.

    Science.gov (United States)

    Hamza, Hosamuddin

    2016-01-01

    Introduction. Surgical tooth extraction is a common procedure in dentistry. However, numerous extraction cases show a high level of difficulty in practice. This difficulty is usually related to inadequate visualization, improper instrumentation, or other factors related to the targeted tooth (e.g., ankyloses or presence of bony undercut). Methods. In this work, the author presents a new technique for surgical tooth extraction based on 3D imaging, computer planning, and a new concept of computer-assisted manufacturing. Results. The outcome of this work is a surgical guide made by 3D printing of plastics and CNC of metals (hybrid outcome). In addition, the conventional surgical cutting tools (surgical burs) are modified with a number of stoppers adjusted to avoid any excessive drilling that could harm bone or other vital structures. Conclusion. The present outcome could provide a minimally invasive technique to overcome the routine complications facing dental surgeons in surgical extraction procedures.

  6. Computer-Assisted Technique for Surgical Tooth Extraction

    Directory of Open Access Journals (Sweden)

    Hosamuddin Hamza

    2016-01-01

    Full Text Available Introduction. Surgical tooth extraction is a common procedure in dentistry. However, numerous extraction cases show a high level of difficulty in practice. This difficulty is usually related to inadequate visualization, improper instrumentation, or other factors related to the targeted tooth (e.g., ankyloses or presence of bony undercut. Methods. In this work, the author presents a new technique for surgical tooth extraction based on 3D imaging, computer planning, and a new concept of computer-assisted manufacturing. Results. The outcome of this work is a surgical guide made by 3D printing of plastics and CNC of metals (hybrid outcome. In addition, the conventional surgical cutting tools (surgical burs are modified with a number of stoppers adjusted to avoid any excessive drilling that could harm bone or other vital structures. Conclusion. The present outcome could provide a minimally invasive technique to overcome the routine complications facing dental surgeons in surgical extraction procedures.

  7. Automated kinematic generator for surgical robotic systems.

    Science.gov (United States)

    Jung, David L; Dixon, Warren E; Pin, François G

    2004-01-01

    Unlike traditional assembly line robotic systems that have a fixed kinematic structure associated with a single tool for a structured task, next-generation robotic surgical assist systems will be required to use an array of end-effector tools. Once a robot is connected with a tool, the kinematic equations of motion are altered. Given the need to accommodate evolving surgical challenges and to alleviate the restrictions imposed by the confined minimally invasive environment, new surgical tools may resemble small flexible snakes rather than rigid, cable driven instruments. Connecting to these developing articulated tools will significantly alter the overall kinematic structure of a robotic system. In this paper we present a technique for real-time automated generation and evaluation of manipulator kinematic equations that exhibits the combined advantages of existing methods-speed and flexibility to kinematic change--without their disadvantages.

  8. Surgical ethics and the challenge of surgical innovation.

    Science.gov (United States)

    Angelos, Peter

    2014-12-01

    Surgical ethics as a specific discipline is relatively new to many. Surgical ethics focuses on the ethical issues that are particularly important to the care of surgical patients. Informed consent for surgical procedures, the level of responsibility that surgeons feel for their patients' outcomes, and the management of surgical innovation are specific issues that are important in surgical ethics and are different from other areas of medicine. The future of surgical progress is dependent on surgical innovation, yet the nature of surgical innovation raises specific concerns that challenge the professionalism of surgeons. These concerns will be considered in the following pages.

  9. Recognizing surgical patterns

    NARCIS (Netherlands)

    Bouarfa, L.

    2012-01-01

    In the Netherlands, each year over 1700 patients die from preventable surgical errors. Numerous initiatives to improve surgical practice have had some impact, but problems persist. Despite the introduction of checklists and protocols, patient safety in surgery remains a continuing challenge. This is

  10. Surgical medical record

    DEFF Research Database (Denmark)

    Bulow, S.

    2008-01-01

    A medical record is presented on the basis of selected linguistic pearls collected over the years from surgical case records Udgivelsesdato: 2008/12/15......A medical record is presented on the basis of selected linguistic pearls collected over the years from surgical case records Udgivelsesdato: 2008/12/15...

  11. Instrumentation, sterilization, and preparation of robot

    Directory of Open Access Journals (Sweden)

    A Bhandari

    2005-01-01

    Full Text Available The da Vinci surgical system is being used for a wide range of surgical tasks. As the applications of this robot increase, more and more surgeons would like to acquire this piece of equipment. There are a wide range of expensive and sophisticated accessories and instruments that come along with this machine, that need special care and attention. The aim of this chapter is the make the user familiar with the various parts of the robot and to provide guidelines for the safe usage of this equipment.

  12. [Living donor transplantation. Surgical complications].

    Science.gov (United States)

    Karam, Georges

    2008-02-01

    Although nephrectomy by open surgery is the most used technique for the extraction of kidney transplants in the living donor, nephrectomy under laparaoscopy is increasingly practiced. Laparoscopic nephrectomy is less invasive and performed under videoscopy control, after insufflation of the peritoneal cavity. Three to four incisions are done in order to enter the surgical instruments. The kidney is extracted through a horizontal sus-pubic incision. The exposition is either exclusively transperitoneal, retroperitoneal or hand assisted. The advantages of laparoscopy are esthetical, financial due to a shorter hospitalisation and a quicker recovery, as well a confort for the donor. The disadvantages are a longer warm ischemia time and possibly a higher risk of delayed graft function. Randomised studies having compared laparoscopy and open surgery in the living donor have not find any significant difference regarding the per- and perioperative in the complications.

  13. A new instrument for intraoperative assessment of individual vocal folds.

    Science.gov (United States)

    Heaton, James T; Kobler, James B; Hillman, Robert E; Zeitels, Steven M

    2005-07-01

    Intraoperative assessment of vocal fold vibration during phonomicrosurgery performed under general anesthesia may enhance surgical decision-making. We therefore developed and bench-tested a new device we refer to as the aerodynamic vocal fold driver (AVFD). The AVFD comprises a hand-held probe that uses airflow to drive individual vocal folds into phonatory-like vibration. This permits stroboscopic visualization of mucosal waves with simultaneous control of subglottal air pressure. In initial experiments to validate the technique, AVFD driven phonation and conventional whole-larynx phonation were compared using excised canine larynges (n = 14). Single vocal fold phonation using the AVFD and whole larynx phonation yielded similar, positive correlations between subglottal pressure and both amplitude and frequency of vibration. Experiments simulating vocal fold scar-related mucosal stiffening by subepithelial injection of fixative showed the expected elevation of phonation threshold pressures as measured with the AVFD. Likewise, unilateral tissue compression injury disrupted vocal fold vibration, and the AVFD was useful for quantifying improvement in the damaged vocal fold after repair with injection of cross-linked hyaluronic acid gel. These results show that this new instrument has the potential to provide novel and useful information for laryngeal experimentation and to improve phonosurgery.

  14. An environmental transfer hub for multimodal atom probe tomography.

    Science.gov (United States)

    Perea, Daniel E; Gerstl, Stephan S A; Chin, Jackson; Hirschi, Blake; Evans, James E

    2017-01-01

    Environmental control during transfer between instruments is required for samples sensitive to air or thermal exposure to prevent morphological or chemical changes prior to analysis. Atom probe tomography is a rapidly expanding technique for three-dimensional structural and chemical analysis, but commercial instruments remain limited to loading specimens under ambient conditions. In this study, we describe a multifunctional environmental transfer hub allowing controlled cryogenic or room-temperature transfer of specimens under atmospheric or vacuum pressure conditions between an atom probe and other instruments or reaction chambers. The utility of the environmental transfer hub is demonstrated through the acquisition of previously unavailable mass spectral analysis of an intact organic molecule made possible via controlled cryogenic transfer into the atom probe using the hub. The ability to prepare and transfer specimens in precise environments promises a means to access new science across many disciplines from untainted samples and allow downstream time-resolved in situ atom probe studies.

  15. IOT Overview: IR Instruments

    Science.gov (United States)

    Mason, E.

    In this instrument review chapter the calibration plans of ESO IR instruments are presented and briefly reviewed focusing, in particular, on the case of ISAAC, which has been the first IR instrument at VLT and whose calibration plan served as prototype for the coming instruments.

  16. Properties of Ultrasound Probes

    OpenAIRE

    Rusina, M.

    2015-01-01

    This work deals with the measurement properties of ultrasound probes. Ultrasound probes and their parameters significantly affect the quality of the final image. In this work there are described the possibility of measuring the spatial resolution, sensitivity of the probe and measuring the length of the dead zone. Ultrasound phantom ATS Multi Purpose Phantom Type 539 was used for measurements.

  17. The Van Allen Probes mission

    CERN Document Server

    Burch, James

    2014-01-01

    This collection of articles provides broad and detailed information about NASA’s Van Allen Probes (formerly known as the Radiation Belt Storm Probes) twin-spacecraft Earth-orbiting mission. The mission has the objective of achieving predictive understanding of the dynamic, intense, energetic, dangerous, and presently unpredictable belts of energetic particles that are magnetically trapped in Earth’s space environment above the atmosphere. It documents the science of the radiation belts and the societal benefits of achieving predictive understanding. Detailed information is provided about the Van Allen Probes mission design, the spacecraft, the science investigations, and the onboard instrumentation that must all work together to make unprecedented measurements within a most unforgiving environment, the core of Earth’s most intense radiation regions.
 This volume is aimed at graduate students and researchers active in space science, solar-terrestrial interactions and studies of the up...

  18. Surface-sensitive conductivity measurement using a micro multi-point probe approach

    DEFF Research Database (Denmark)

    Perkins, Edward; Barreto, Lucas; Wells, Justin

    2013-01-01

    An instrument for microscale electrical transport measurements in ultra-high vacuum is presented. The setup is constructed around collinear lithographically-created multi-point probes with a contact spacing down to 500 nm. Most commonly, twelve-point probes are used. These probes are approached t...... for epitaxial graphene on SiC and degenerately doped Bi2Se3....

  19. Surgical ethics: surgical virtue and more.

    Science.gov (United States)

    Vercler, Christian J

    2015-01-01

    The encounter between a patient and her surgeon is unique for several reasons. The surgeon inflicts pain upon a patient for the patient's own good. An operative intervention is irreducibly personal, such that the decisions about and performance of operations are inseparable from the idiosyncrasies of the individual surgeon. Furthermore, there is a chasm of knowledge between the patient and surgeon that is difficult to cross. Hence, training in the discipline of surgery includes the inculcation of certain virtues and practices to safeguard against abuses of this relationship and to make sure that the best interests of the patient are prioritized. The stories in this issue are evidence that in contemporary practice this is not quite enough, as surgeons reflect on instances they felt were ethically challenging. Common themes include the difficulty in communicating surgical uncertainty, patient-surgeon relationships, ethical issues in surgical training, and the impact of the technological imperative on caring for dying patients.

  20. Probe Measures Fouling As In Heat Exchangers

    Science.gov (United States)

    Marner, Wilbur J.; Macdavid, Kenton S.

    1990-01-01

    Combustion deposits reduce transfer of heat. Instrument measures fouling like that on gas side of heat exchanger in direct-fired boiler or heat-recovery system. Heat-flux probe includes tube with embedded meter in outer shell. Combustion gases flow over probe, and fouling accumulates on it, just as fouling would on heat exchanger. Embedded heat-flow meter is sandwich structure in which thin Chromel layers and middle alloy form thermopile. Users determine when fouling approaches unacceptable levels so they schedule cleaning and avoid decreased transfer of heat and increased drop in pressure fouling causes. Avoids cost of premature, unnecessary maintenance.

  1. Multiscale Surgical Telerobots

    Energy Technology Data Exchange (ETDEWEB)

    Miles, R R; Seward, K P; Benett, W J; Tendick, F; Bentley, L; Stephan, P L

    2002-01-23

    A project was undertaken to improve robotic surgical tools for telerobotic minimally invasive surgery. The major objectives were to reduce the size of the tools to permit new surgical procedures in confined spaces such as the heart and to improve control of surgical tools by locating positional sensors and actuators at the end effector rather than external to the patient as is currently the state of the technology. A new compact end-effector with wrist-like flexibility was designed. Positional sensors based on MEMS microfabrication techniques were designed.

  2. Níveis de ansiedade de alunos de graduação em enfermagem frente à primeira instrumentação cirúrgica Niveles de ansiedad de los alumnos de pregrado en enfermería delante de la primera instrumentación quirúrgica Nursing undergraduates' anxiety about the first surgical instrumentation

    Directory of Open Access Journals (Sweden)

    Rachel de Carvalho

    2004-12-01

    ' anxiety about the first surgical instrumentation. The sample consisted of 30 sixth-period students who were enrolled in the subject Surgical Nursing. Data were collected through the STAI (State-Trait Anxiety Inventory. We identified that 90% of the students demonstrated low levels of trait anxiety. As to state anxiety, the most frequent observations were: low anxiety level on the first day of theoretical class (76.7%. medium anxiety level at the lab (53% and medium anxiety level during supervised training (80%. Furthermore, we identified a small number of students with high anxiety levels. The statistical analysis shows significant differences among the mean levels of state-anxiety during the three data collection phases.

  3. Nuclear probes and intraoperative gamma cameras.

    Science.gov (United States)

    Heller, Sherman; Zanzonico, Pat

    2011-05-01

    Gamma probes are now an important, well-established technology in the management of cancer, particularly in the detection of sentinel lymph nodes. Intraoperative sentinel lymph node as well as tumor detection may be improved under some circumstances by the use of beta (negatron or positron), rather than gamma detection, because the very short range (∼ 1 mm or less) of such particulate radiations eliminates the contribution of confounding counts from activity other than in the immediate vicinity of the detector. This has led to the development of intraoperative beta probes. Gamma camera imaging also benefits from short source-to-detector distances and minimal overlying tissue, and intraoperative small field-of-view gamma cameras have therefore been developed as well. Radiation detectors for intraoperative probes can generally be characterized as either scintillation or ionization detectors. Scintillators used in scintillation-detector probes include thallium-doped sodium iodide, thallium- and sodium-doped cesium iodide, and cerium-doped lutecium orthooxysilicate. Alternatives to inorganic scintillators are plastic scintillators, solutions of organic scintillation compounds dissolved in an organic solvent that is subsequently polymerized to form a solid. Their combined high counting efficiency for beta particles and low counting efficiency for 511-keV annihilation γ-rays make plastic scintillators well-suited as intraoperative beta probes in general and positron probes in particular Semiconductors used in ionization-detector probes include cadmium telluride, cadmium zinc telluride, and mercuric iodide. Clinical studies directly comparing scintillation and semiconductor intraoperative probes have not provided a clear choice between scintillation and ionization detector-based probes. The earliest small field-of-view intraoperative gamma camera systems were hand-held devices having fields of view of only 1.5-2.5 cm in diameter that used conventional thallium

  4. Guide to Surgical Specialists

    Science.gov (United States)

    ... have expertise in the following areas of responsibility: neonatal surgery (specialized knowledge in the surgical repair of ... and non-operative management of certain types of pain. Common conditions managed by neurologic surgeons include disorders ...

  5. Surgical Critical Care Initiative

    Data.gov (United States)

    Federal Laboratory Consortium — The Surgical Critical Care Initiative (SC2i) is a USU research program established in October 2013 to develop, translate, and validate biology-driven critical care....

  6. Ambulatory Surgical Measures - National

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Ambulatory Surgical Center Quality Reporting (ASCQR) Program seeks to make care safer and more efficient through quality reporting. ASCs eligible for this...

  7. Ambulatory Surgical Measures - Facility

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Ambulatory Surgical Center Quality Reporting (ASCQR) Program seeks to make care safer and more efficient through quality reporting. ASCs eligible for this...

  8. Surgical site infections

    African Journals Online (AJOL)

    and mortality as well as significant financial implications. Worldwide it has ... common nosocomial infection amongst surgical patients with up to 38% .... antibiotics as soon as the sensitivity results are available. ... Breast surgery. Staph Aureus/ ...

  9. Langmuir probe in collisionless and collisional plasma including dusty plasma

    Science.gov (United States)

    Bose, Sayak; Kaur, Manjit; Chattopadhyay, P. K.; Ghosh, J.; Saxena, Y. C.; Pal, R.

    2017-04-01

    Measurements of local plasma parameters in dusty plasma are crucial for understanding the physics issues related to such systems. The Langmuir probe, a small electrode immersed in the plasma, provides such measurements. However, designing of a Langmuir probe system in a dusty plasma environment demands special consideration. First, the probe has to be miniaturized enough so that its perturbation on the ambient dust structure is minimal. At the same time, the probe dimensions must be such that a well-defined theory exists for interpretation of its characteristics. The associated instrumentation must also support the measurement of current collected by the probe with high signal to noise ratio. The most important consideration, of course, comes from the fact that the probes are prone to dust contamination, as the dust particles tend to stick to the probe surface and alter the current collecting area in unpredictable ways. This article describes the design and operation of a Langmuir probe system that resolves these challenging issues in dusty plasma. In doing so, first, different theories that are used to interpret the probe characteristics in collisionless as well as in collisional regimes are discussed, with special emphasis on application. The critical issues associated with the current-voltage characteristics of Langmuir probe obtained in different operating regimes are discussed. Then, an algorithm for processing these characteristics efficiently in presence of ion-neutral collisions in the probe sheath is presented.

  10. 21 CFR 884.4520 - Obstetric-gynecologic general manual instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Obstetric-gynecologic general manual instrument... Surgical Devices § 884.4520 Obstetric-gynecologic general manual instrument. (a) Identification. An obstetric-gynecologic general manual instrument is one of a group of devices used to perform...

  11. 21 CFR 888.5980 - Manual cast application and removal instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Manual cast application and removal instrument... SERVICES (CONTINUED) MEDICAL DEVICES ORTHOPEDIC DEVICES Surgical Devices § 888.5980 Manual cast application and removal instrument. (a) Identification. A manual cast application and removal instrument is...

  12. Phoenix Conductivity Probe with Shadow and Toothmark

    Science.gov (United States)

    2008-01-01

    NASA's Phoenix Mars Lander inserted the four needles of its thermal and conductivity probe into Martian soil during the 98th Martian day, or sol, of the mission and left it in place until Sol 99 (Sept. 4, 2008). The Robotic Arm Camera on Phoenix took this image on the morning of Sol 99 after the probe was lifted away from the soil. The imprint left by the insertion is visible below the probe, and a shadow showing the probe's four needles is cast on a rock to the left. The thermal and conductivity probe measures how fast heat and electricity move from one needle to an adjacent one through the soil or air between the needles. Conductivity readings can be indicators about water vapor, water ice and liquid water. The probe is part of Phoenix's Microscopy, Electrochemistry and Conductivity suite of instruments. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  13. Haptic feedback and control of a flexible surgical endoscopic robot.

    Science.gov (United States)

    Wang, Zheng; Sun, Zhenglong; Phee, Soo Jay

    2013-11-01

    A flexible endoscope could reach the potential surgical site via a single small incision on the patient or even through natural orifices, making it a very promising platform for surgical procedures. However, endoscopic surgery has strict spatial constraints on both tool-channel size and surgical site volume. It is therefore very challenging to deploy and control dexterous robotic instruments to conduct surgical procedures endoscopically. Pioneering endoscopic surgical robots have already been introduced, but the performance is limited by the flexible neck of the robot that passes through the endoscope tool channel. In this article we present a series of new developments to improve the performance of the robot: a force transmission model to address flexibility, elongation study for precise position control, and tissue property modeling for haptic feedback. Validation experiment results are presented for each sector. An integrated control architecture of the robot system is given in the end. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  14. Recognition of surgical skills using hidden Markov models

    Science.gov (United States)

    Speidel, Stefanie; Zentek, Tom; Sudra, Gunther; Gehrig, Tobias; Müller-Stich, Beat Peter; Gutt, Carsten; Dillmann, Rüdiger

    2009-02-01

    Minimally invasive surgery is a highly complex medical discipline and can be regarded as a major breakthrough in surgical technique. A minimally invasive intervention requires enhanced motor skills to deal with difficulties like the complex hand-eye coordination and restricted mobility. To alleviate these constraints we propose to enhance the surgeon's capabilities by providing a context-aware assistance using augmented reality techniques. To recognize and analyze the current situation for context-aware assistance, we need intraoperative sensor data and a model of the intervention. Characteristics of a situation are the performed activity, the used instruments, the surgical objects and the anatomical structures. Important information about the surgical activity can be acquired by recognizing the surgical gesture performed. Surgical gestures in minimally invasive surgery like cutting, knot-tying or suturing are here referred to as surgical skills. We use the motion data from the endoscopic instruments to classify and analyze the performed skill and even use it for skill evaluation in a training scenario. The system uses Hidden Markov Models (HMM) to model and recognize a specific surgical skill like knot-tying or suturing with an average recognition rate of 92%.

  15. A single probe for imaging photons, electrons and physical forces

    Science.gov (United States)

    Pilet, Nicolas; Lisunova, Yuliya; Lamattina, Fabio; Stevenson, Stephanie E.; Pigozzi, Giancarlo; Paruch, Patrycja; Fink, Rainer H.; Hug, Hans J.; Quitmann, Christoph; Raabe, Joerg

    2016-06-01

    The combination of complementary measurement techniques has become a frequent approach to improve scientific knowledge. Pairing of the high lateral resolution scanning force microscopy (SFM) with the spectroscopic information accessible through scanning transmission soft x-ray microscopy (STXM) permits assessing physical and chemical material properties with high spatial resolution. We present progress from the NanoXAS instrument towards using an SFM probe as an x-ray detector for STXM measurements. Just by the variation of one parameter, the SFM probe can be utilised to detect either sample photo-emitted electrons or transmitted photons. This allows the use of a single probe to detect electrons, photons and physical forces of interest. We also show recent progress and demonstrate the current limitations of using a high aspect ratio coaxial SFM probe to detect photo-emitted electrons with very high lateral resolution. Novel probe designs are proposed to further progress in using an SFM probe as a STXM detector.

  16. Instrument Modeling and Synthesis

    Science.gov (United States)

    Horner, Andrew B.; Beauchamp, James W.

    During the 1970s and 1980s, before synthesizers based on direct sampling of musical sounds became popular, replicating musical instruments using frequency modulation (FM) or wavetable synthesis was one of the “holy grails” of music synthesis. Synthesizers such as the Yamaha DX7 allowed users great flexibility in mixing and matching sounds, but were notoriously difficult to coerce into producing sounds like those of a given instrument. Instrument design wizards practiced the mysteries of FM instrument design.

  17. Performing the Super Instrument

    DEFF Research Database (Denmark)

    Kallionpaa, Maria

    2016-01-01

    The genre of contemporary classical music has seen significant innovation and research related to new super, hyper, and hybrid instruments, which opens up a vast palette of expressive potential. An increasing number of composers, performers, instrument designers, engineers, and computer programmers...... provides the performer extensive virtuoso capabilities in terms of instrumental range, harmony, timbre, or spatial, textural, acoustic, technical, or technological qualities. The discussion will be illustrated by a composition case study involving augmented musical instrument electromagnetic resonator...

  18. Performing the Super Instrument

    DEFF Research Database (Denmark)

    Kallionpaa, Maria

    2016-01-01

    provides the performer extensive virtuoso capabilities in terms of instrumental range, harmony, timbre, or spatial, textural, acoustic, technical, or technological qualities. The discussion will be illustrated by a composition case study involving augmented musical instrument electromagnetic resonator......The genre of contemporary classical music has seen significant innovation and research related to new super, hyper, and hybrid instruments, which opens up a vast palette of expressive potential. An increasing number of composers, performers, instrument designers, engineers, and computer programmers...

  19. Aeroacoustics of Musical Instruments

    NARCIS (Netherlands)

    Fabre, B.; Gilbert, J.; Hirschberg, A.; Pelorson, X.

    2012-01-01

    We are interested in the quality of sound produced by musical instruments and their playability. In wind instruments, a hydrodynamic source of sound is coupled to an acoustic resonator. Linear acoustics can predict the pitch of an instrument. This can significantly reduce the trial-and-error process

  20. Atom probe crystallography

    National Research Council Canada - National Science Library

    Gault, Baptiste; Moody, Michael P; Cairney, Julie M; Ringer, Simon P

    2012-01-01

    This review addresses new developments in the emerging area of "atom probe crystallography", a materials characterization tool with the unique capacity to reveal both composition and crystallographic...

  1. 3D Surgical Simulation

    Science.gov (United States)

    Cevidanes, Lucia; Tucker, Scott; Styner, Martin; Kim, Hyungmin; Chapuis, Jonas; Reyes, Mauricio; Proffit, William; Turvey, Timothy; Jaskolka, Michael

    2009-01-01

    This paper discusses the development of methods for computer-aided jaw surgery. Computer-aided jaw surgery allows us to incorporate the high level of precision necessary for transferring virtual plans into the operating room. We also present a complete computer-aided surgery (CAS) system developed in close collaboration with surgeons. Surgery planning and simulation include construction of 3D surface models from Cone-beam CT (CBCT), dynamic cephalometry, semi-automatic mirroring, interactive cutting of bone and bony segment repositioning. A virtual setup can be used to manufacture positioning splints for intra-operative guidance. The system provides further intra-operative assistance with the help of a computer display showing jaw positions and 3D positioning guides updated in real-time during the surgical procedure. The CAS system aids in dealing with complex cases with benefits for the patient, with surgical practice, and for orthodontic finishing. Advanced software tools for diagnosis and treatment planning allow preparation of detailed operative plans, osteotomy repositioning, bone reconstructions, surgical resident training and assessing the difficulties of the surgical procedures prior to the surgery. CAS has the potential to make the elaboration of the surgical plan a more flexible process, increase the level of detail and accuracy of the plan, yield higher operative precision and control, and enhance documentation of cases. Supported by NIDCR DE017727, and DE018962 PMID:20816308

  2. Anxiety in veterinary surgical students

    DEFF Research Database (Denmark)

    Langebæk, Rikke; Eika, Berit; Jensen, Asger Lundorff

    2012-01-01

    The surgical educational environment is potentially stressful and this can negatively affect students' learning. The aim of this study was to investigate whether veterinary students' level of anxiety is higher in a surgical course than in a non-surgical course and if pre-surgical training...... in a Surgical Skills Lab (SSL) has an anxiety reducing effect. Investigations were carried out as a comparative study and a parallel group study. Potential participants were fourth-year veterinary students who attended a surgical course (Basic Surgical Skills) and a non-surgical course (Clinical Examination...... and 28 students from 2010). Our results show that anxiety levels in veterinary students are significantly higher in a surgical course than in a non-surgical course (p...

  3. Astrophysical Probes of Fundamental Physics

    CERN Document Server

    Martins, C J A P

    2006-01-01

    I review the theoretical motivation for varying fundamental couplings and discuss how these measurements can be used to constrain a number of fundamental physics scenarios that would otherwise be inacessible to experiment. As a case study I will focus on the relation between varying couplings and dark energy, and explain how varying coupling measurements can be used to probe the nature of dark energy, with important advantages over the standard methods. Assuming that the current observational evidence for varying $\\alpha$ and $\\mu$ is correct, a several-sigma detection of dynamical dark energy is feasible within a few years, using currently operational ground-based facilities. With forthcoming instruments like CODEX, a high-accuracy reconstruction of the equation of state may be possible all the way up to redshift $z\\sim4$.

  4. Challenging Residual Contamination of Instruments for Robotic Surgery in Japan.

    Science.gov (United States)

    Saito, Yuhei; Yasuhara, Hiroshi; Murakoshi, Satoshi; Komatsu, Takami; Fukatsu, Kazuhiko; Uetera, Yushi

    2017-02-01

    BACKGROUND Recently, robotic surgery has been introduced in many hospitals. The structure of robotic instruments is so complex that updating their cleaning methods is a challenge for healthcare professionals. However, there is limited information on the effectiveness of cleaning for instruments for robotic surgery. OBJECTIVE To determine the level of residual contamination of instruments for robotic surgery and to develop a method to evaluate the cleaning efficacy for complex surgical devices. METHODS Surgical instruments were collected immediately after operations and/or after in-house cleaning, and the level of residual protein was measured. Three serial measurements were performed on instruments after cleaning to determine the changes in the level of contamination and the total amount of residual protein. The study took place from September 1, 2013, through June 30, 2015, in Japan. RESULTS The amount of protein released from robotic instruments declined exponentially. The amount after in-house cleaning was 650, 550, and 530 µg/instrument in the 3 serial measurements. The overall level of residual protein in each measurement was much higher for robotic instruments than for ordinary instruments (Probotic surgery. Infect Control Hosp Epidemiol 2017;38:143-146.

  5. Surgical bleeding in microgravity

    Science.gov (United States)

    Campbell, M. R.; Billica, R. D.; Johnston, S. L. 3rd

    1993-01-01

    A surgical procedure performed during space flight would occur in a unique microgravity environment. Several experiments performed during weightlessness in parabolic flight were reviewed to ascertain the behavior of surgical bleeding in microgravity. Simulations of bleeding using dyed fluid and citrated bovine blood, as well as actual arterial and venous bleeding in rabbits, were examined. The high surface tension property of blood promotes the formation of large fluid domes, which have a tendency to adhere to the wound. The use of sponges and suction will be adequate to prevent cabin atmosphere contamination with all bleeding, with the exception of temporary arterial droplet streams. The control of the bleeding with standard surgical techniques should not be difficult.

  6. Surgical management of presbyopia

    Directory of Open Access Journals (Sweden)

    Torricelli AA

    2012-09-01

    Full Text Available André AM Torricelli, Jackson B Junior, Marcony R Santhiago, Samir J BecharaDivision of Ophthalmology, University of São Paulo Medical School, São Paulo, BrazilAbstract: Presbyopia, the gradual loss of accommodation that becomes clinically significant during the fifth decade of life, is a physiologic inevitability. Different technologies are being pursued to achieve surgical correction of this disability; however, a number of limitations have prevented widespread acceptance of surgical presbyopia correction, such as optical and visual distortion, induced corneal ectasia, haze, anisometropy with monovision, regression of effect, decline in uncorrected distance vision, and the inherent risks with invasive techniques, limiting the development of an ideal solution. The correction of the presbyopia and the restoration of accommodation are considered the final frontier of refractive surgery. The purpose of this paper is to provide an update about current procedures available for presbyopia correction, their advantages, and disadvantages.Keywords: presbyopia, surgical correction, treatment

  7. Flexible, Penetrating Brain Probes Enabled by Advances in Polymer Microfabrication

    Directory of Open Access Journals (Sweden)

    Ahuva Weltman

    2016-10-01

    Full Text Available The acquisition of high-fidelity, long-term neural recordings in vivo is critically important to advance neuroscience and brain–machine interfaces. For decades, rigid materials such as metal microwires and micromachined silicon shanks were used as invasive electrophysiological interfaces to neurons, providing either single or multiple electrode recording sites. Extensive research has revealed that such rigid interfaces suffer from gradual recording quality degradation, in part stemming from tissue damage and the ensuing immune response arising from mechanical mismatch between the probe and brain. The development of “soft” neural probes constructed from polymer shanks has been enabled by advancements in microfabrication; this alternative has the potential to mitigate mismatch-related side effects and thus improve the quality of recordings. This review examines soft neural probe materials and their associated microfabrication techniques, the resulting soft neural probes, and their implementation including custom implantation and electrical packaging strategies. The use of soft materials necessitates careful consideration of surgical placement, often requiring the use of additional surgical shuttles or biodegradable coatings that impart temporary stiffness. Investigation of surgical implantation mechanics and histological evidence to support the use of soft probes will be presented. The review concludes with a critical discussion of the remaining technical challenges and future outlook.

  8. Surgical Treatment of Atrial Fibrillation: A Review

    Directory of Open Access Journals (Sweden)

    Nadine Hiari

    2011-01-01

    Full Text Available Atrial fibrillation is the most commonly sustained arrhythmia in man. While it affects millions of patients worldwide, its incidence will markedly increase with an aging population. Primary goals of AF therapy are to (1 reduce embolic complications, particularly stroke, (2 alleviate symptoms, and (3 prevent long-term heart remodelling. These have been proven to be a challenge as there are major limitations in our knowledge of the pathological and electrophysiological mechanisms underlying AF. Although advances continue to be made in the medical management of this condition, pharmacotherapy is often unsuccessful. Because of the high recurrence rate of AF despite antiarrhythmic drug therapy for maintenance of sinus rhythm and the adverse effects of these drugs, there has been growing interest in nonpharmacological strategies. Surgery for treatment of AF has been around for some time. The Cox-Maze procedure is the gold standard for the surgical treatment of atrial fibrillation and has more than 90% success in eliminating atrial fibrillation. Although the cut and sew maze is very effective, it has been superseded by newer operations that rely on alternate energy sources to create lines of conduction block. In addition, the evolution of improved ablation technology and instrumentation has facilitated the development of minimally invasive approaches. In this paper, the rationale for surgical ablation for atrial fibrillation and the different surgical techniques that were developed will be explored. In addition, it will detail the new approaches to surgical ablation of atrial fibrillation that employ alternate energy sources.

  9. Advanced oxidation scanning probe lithography

    Science.gov (United States)

    Ryu, Yu K.; Garcia, Ricardo

    2017-04-01

    Force microscopy enables a variety of approaches to manipulate and/or modify surfaces. Few of those methods have evolved into advanced probe-based lithographies. Oxidation scanning probe lithography (o-SPL) is the only lithography that enables the direct and resist-less nanoscale patterning of a large variety of materials, from metals to semiconductors; from self-assembled monolayers to biomolecules. Oxidation SPL has also been applied to develop sophisticated electronic and nanomechanical devices such as quantum dots, quantum point contacts, nanowire transistors or mechanical resonators. Here, we review the principles, instrumentation aspects and some device applications of o-SPL. Our focus is to provide a balanced view of the method that introduces the key steps in its evolution, provides some detailed explanations on its fundamentals and presents current trends and applications. To illustrate the capabilities and potential of o-SPL as an alternative lithography we have favored the most recent and updated contributions in nanopatterning and device fabrication.

  10. Advanced oxidation scanning probe lithography.

    Science.gov (United States)

    Ryu, Yu K; Garcia, Ricardo

    2017-04-07

    Force microscopy enables a variety of approaches to manipulate and/or modify surfaces. Few of those methods have evolved into advanced probe-based lithographies. Oxidation scanning probe lithography (o-SPL) is the only lithography that enables the direct and resist-less nanoscale patterning of a large variety of materials, from metals to semiconductors; from self-assembled monolayers to biomolecules. Oxidation SPL has also been applied to develop sophisticated electronic and nanomechanical devices such as quantum dots, quantum point contacts, nanowire transistors or mechanical resonators. Here, we review the principles, instrumentation aspects and some device applications of o-SPL. Our focus is to provide a balanced view of the method that introduces the key steps in its evolution, provides some detailed explanations on its fundamentals and presents current trends and applications. To illustrate the capabilities and potential of o-SPL as an alternative lithography we have favored the most recent and updated contributions in nanopatterning and device fabrication.

  11. Analysis of exfoliated gastric carcinoma cells attached on surgical supplies

    Directory of Open Access Journals (Sweden)

    Yu XF

    2014-10-01

    Full Text Available Xiao-Fen Yu,1 Ying-Yu Ma,2 Xian-Qin Hu,1 Qin-Fang Zhang,1 Zai-Yuan Ye3 1Operating Theatre, Zhejiang Provincial People’s Hospital, 2Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People’s Hospital, 3Department of Gastrointestinal Surgery, Zhejiang Provincial People’s Hospital, Hangzhou, People’s Republic of China Abstract: Surgery is considered to have a leading role in the treatment of gastric carcinoma. Surgical supplies are used to cut, divide, and ligate during surgery, and are not only in close contact with normal tissues, but may also be contaminated by pathological tissues and cells. This study sought to determine the presence of exfoliated tumor cells on surgical supplies at different stages during the surgical procedure. We collected five types of surgical supplies from 90 patients who underwent D2 radical gastrectomy to find out if there was any cancer cells attached to them. Highest numbers of cancer cells were found on gauze used to clean the surgical instruments and on the gloves of scrub nurses. The likelihood of finding cancer cells increased with advancing clinical stage of disease, lower differentiation of cancer cells, increasing frequency of use of supplies and extent of contact, and was also associated with the characteristic of surgical supplies. Dissemination of tumor cells could be prevented by using a number of methods, depending on the type of surgical supply items. Keywords: exfoliated tumor cells, surgical supplies, gastric carcinoma, metastasis, prevention

  12. THOR Electric Field Instrument - EFI

    Science.gov (United States)

    Khotyaintsev, Yuri; Bale, Stuart D.; Rothkaehl, Hanna; Bonnell, John; Åhlen, Lennart; Vaivads, Andris; Lindqvist, Per-Arne; Ivchenko, Nickolay; Soucek, Jan

    2017-04-01

    Turbulence Heating ObserveR (THOR) is the first mission ever flown in space dedicated to plasma turbulence. The Electric Field Instrument (EFI) is to measure the electric field vector in the frequency range 0-200 kHz. EFI consists of two sets of sensors: Spin-plane Double Probes (EFI-SDP) providing high sensitivity DC electric field in the spacecraft spin plane (2D), and the High-Frequency Antenna (EFI-HFA) providing 3D electric field at frequencies above 1 kHz. EFI-SDP consists of 4 biased spherical probes extended on 50 m long wire booms, 90 degrees apart in the spin plane, giving a 100 m baseline for each of the two spin-plane electric field components. EFI-HFA consists of 6 x 1.25 m long monopoles, forming 3 dipolar antennas crossed at 90 degrees to each other. In addition to the sensors, EFI contains HFA and SDP pre-amplifiers, as well as bias electronics boards (BEBs) hosted in the man electronics box of the Field and Wave processor (FWP). As THOR spacecraft has a sun-pointing spin axis, EFI-SDP measures the electric field in the plane approximately orthogonal to the sun using long wire booms. The sun-pointing attitude greatly reduces errors due to wake effects and asymmetric photoelectron clouds, enabling the highly accurate in comparison to earlier missions ±0.1 mV/m near-DC electric field measurements. Interferometry using the electric field probes can be used to infer wavelengths and scale sizes at the smallest scales in the plasma. EFI also measures the floating potential of the satellite, which can be used to estimate the plasma density at very high time resolution (up to a few hundred Hz). The sun-pointing attitude greatly reduces changes in the illuminated area, and hence the associated spin-dependent errors. In combination with densities derived from the observed plasma frequency emission line, EFI monitors the plasma density from DC to a few hundred Hz. EFI measurements characterize electric field and density variations associated with kinetic

  13. Pioneer Jupiter orbiter probe mission 1980, probe description

    Science.gov (United States)

    Defrees, R. E.

    1974-01-01

    The adaptation of the Saturn-Uranus Atmospheric Entry Probe (SUAEP) to a Jupiter entry probe is summarized. This report is extracted from a comprehensive study of Jovian missions, atmospheric model definitions and probe subsystem alternatives.

  14. [Optimizing surgical hand disinfection].

    Science.gov (United States)

    Kampf, G; Kramer, A; Rotter, M; Widmer, A

    2006-08-01

    For more than 110 years hands of surgeons have been treated before a surgical procedure in order to reduce the bacterial density. The kind and duration of treatment, however, has changed significantly over time. Recent scientific evidence suggests a few changes with the aim to optimize both the efficacy and the dermal tolerance. Aim of this article is the presentation and discussion of new insights in surgical hand disinfection. A hand wash should be performed before the first disinfection of a day, ideally at least 10 min before the beginning of the disinfection as it has been shown that a 1 min hand wash significantly increases skin hydration for up to 10 min. The application time may be as short as 1.5 min depending on the type of hand rub. Hands and forearms should be kept wet with the hand rub for the recommended application time in any case. A specific rub-in procedure according to EN 12791 has been found to be suitable in order to avoid untreated skin areas. The alcohol-based hand rub should have a proven excellent dermal tolerance in order to ensure appropriate compliance. Considering these elements in clinical practice can have a significant impact to optimize the high quality of surgical hand disinfection for prevention of surgical site infections.

  15. Surface-sensitive conductivity measurement using a micro multi-point probe approach

    DEFF Research Database (Denmark)

    Perkins, Edward; Barreto, Lucas; Wells, Justin

    2013-01-01

    An instrument for microscale electrical transport measurements in ultra-high vacuum is presented. The setup is constructed around collinear lithographically-created multi-point probes with a contact spacing down to 500 nm. Most commonly, twelve-point probes are used. These probes are approached...... measurements with an equidistant four-point probe for a wide range of contact spacings. In this way, it is possible to distinguish between bulk-like and surface-like conduction. The paper describes the design of the instrument and the approach to data and error analysis. Application examples are given...

  16. Surgical experience of the ruptured distal anterior cerebral artery aneurysms.

    Science.gov (United States)

    Lee, Jong-Young; Kim, Moon-Kyu; Cho, Byung-Moon; Park, Se-Hyuck; Oh, Sae-Moon

    2007-10-01

    Distal anterior cerebral artery (DACA) aneurysms are fragile and known to have high risks for intraoperative premature rupture and a relatively high associated morbidity. To improve surgical outcomes of DACA aneurysms, we reviewed our surgical strategy and its results postoperatively. A total of 845 patients with ruptured cerebral aneurysms were operated in our hospital from January 1991 to December 2005. Twenty-three of 845 patients had ruptured DACA aneurysms which were operated on according to our surgical strategy. Our surgical strategy was as follows; early surgery, appropriate releasing of CSF, appropriate surgical approach, using neuronavigating system, securing the bridging veins, using temporary clipping and/or tentative clipping, meticulous manipulation of aneurysm, and using micro-Doppler flow probe. Twenty of 23 patients who had complete medical records were studied retrospectively. We observed the postoperative radiographic findings and checked Glasgow Outcome Scale score sixth months after the operation. Nineteen DACA aneurysms were clipped through a unilateral interhemispheric approach and one DACA aneurysm was clipped through a pterional approach. Postoperative radiographic findings revealed complete clipping of aneurysmal neck without stenosis or occlusion of parent arteries. In two patients, a residual neck of aneurysm was visualized. Seventeen patients showed good recovery, one patient resulted in moderate disability, while 2 patients died. With our surgical strategy it was possible to achieve acceptable surgical morbidity and mortality rates in patients with DACA aneurysms. Appropriate use of tentative clipping, temporary clipping and neuro-navigating systems can give great help for safe approach and clipping of DACA aneurysm.

  17. VIRUS instrument enclosures

    Science.gov (United States)

    Prochaska, T.; Allen, R.; Mondrik, N.; Rheault, J. P.; Sauseda, M.; Boster, E.; James, M.; Rodriguez-Patino, M.; Torres, G.; Ham, J.; Cook, E.; Baker, D.; DePoy, Darren L.; Marshall, Jennifer L.; Hill, G. J.; Perry, D.; Savage, R. D.; Good, J. M.; Vattiat, Brian L.

    2014-08-01

    The Visible Integral-Field Replicable Unit Spectrograph (VIRUS) instrument will be installed at the Hobby-Eberly Telescope† in the near future. The instrument will be housed in two enclosures that are mounted adjacent to the telescope, via the VIRUS Support Structure (VSS). We have designed the enclosures to support and protect the instrument, to enable servicing of the instrument, and to cool the instrument appropriately while not adversely affecting the dome environment. The system uses simple HVAC air handling techniques in conjunction with thermoelectric and standard glycol heat exchangers to provide efficient heat removal. The enclosures also provide power and data transfer to and from each VIRUS unit, liquid nitrogen cooling to the detectors, and environmental monitoring of the instrument and dome environments. In this paper, we describe the design and fabrication of the VIRUS enclosures and their subsystems.

  18. Gemini Instrument Upgrade Program

    Science.gov (United States)

    Diaz, Ruben; Goodsell, Stephen; Kleinman, Scot

    2016-08-01

    The Gemini Observatory* remains committed to keeping its operational instrumentation competitive and serving the needs of its user community. Currently the observatory operates a 4 instruments + 1 AO system at each site. At Gemini North the GMOS-N, GNIRS, NIFS and NIRI instruments are offered supported by the ALTAIR AO system. In the south, GMOS-S, F-2, GPI and GSAOI are offered instrumentation and GeMS is the provided AO System. This paper reviews our strategy to keep our instrumentation suite competitive, examines both our current funded upgrade projects and our potential future enhancements. We summarize the work done and the results so far obtained within the instrument upgrade program.

  19. Instrumentation a reader

    CERN Document Server

    Pope, P

    1990-01-01

    This book contains a selection of papers and articles in instrumentation previously pub­ lished in technical periodicals and journals of learned societies. Our selection has been made to illustrate aspects of current practice and applications of instrumentation. The book does not attempt to be encyclopaedic in its coverage of the subject, but to provide some examples of general transduction techniques, of the sensing of particular measurands, of components of instrumentation systems and of instrumentation practice in two very different environments, the food industry and the nuclear power industry. We have made the selection particularly to provide papers appropriate to the study of the Open University course T292 Instrumentation. The papers have been chosen so that the book covers a wide spectrum of instrumentation techniques. Because of this, the book should be of value not only to students of instrumen­ tation, but also to practising engineers and scientists wishing to glean ideas from areas of instrumen...

  20. Hydraulic Robotic Surgical Tool Changing Manipulator.

    Science.gov (United States)

    Pourghodrat, Abolfazl; Nelson, Carl A; Oleynikov, Dmitry

    2017-03-01

    Natural orifice transluminal endoscopic surgery (NOTES) is a surgical technique to perform "scarless" abdominal operations. Robotic technology has been exploited to improve NOTES and circumvent its limitations. Lack of a multitasking platform is a major limitation. Manual tool exchange can be time consuming and may lead to complications such as bleeding. Previous multifunctional manipulator designs use electric motors. These designs are bulky, slow, and expensive. This paper presents design, prototyping, and testing of a hydraulic robotic tool changing manipulator. The manipulator is small, fast, low-cost, and capable of carrying four different types of laparoscopic instruments.

  1. Aircrew Screening Instruments Review

    Science.gov (United States)

    2007-09-01

    available tools . Several vendors indicated that they will have new selection instruments available within a few months. These are not listed. As noted...AFCAPS-FR-2011-0012 AIRCREW SCREENING INSTRUMENTS REVIEW Diane L. Damos Damos Aviation Services, Inc...June 2007 – August 2007 4. TITLE AND SUBTITLE Aircrew Screening Instruments Review 5a. CONTRACT NUMBER FA3089-06-F-0385 5b. GRANT NUMBER 5c

  2. Instrumentation in Earthquake Seismology

    Science.gov (United States)

    Havskov, Jens; Alguacil, Gerardo

    Here is unique and comprehensive coverage of modern seismic instrumentation, based on the authors' practical experience of a quarter-century in seismology and geophysics. Their goal is to provide not only detailed information on the basics of seismic instruments but also to survey equipment on the market, blending this with only the amount of theory needed to understand the basic principles. Seismologists and technicians working with seismological instruments will find here the answers to their practical problems.

  3. [da Vinci surgical system].

    Science.gov (United States)

    Watanabe, Gou; Ishikawa, Norihiro

    2014-07-01

    The da Vinci surgical system was developed by Intuitive Surgical Inc. in the United States as an endoscopic surgical device to assist remote control surgeries. In 1998, the Da Vinci system was first used for cardiothoracic procedures. Currently a combination of robot-assisted internal thoracic artery harvest together with coronary artery bypass grafting (CABG) through a mini-incision (ThoraCAB) or totally endoscopic procedures including anastomoses under robotic assistance (TECAB) are being conducted for the treatment of coronary artery diseases. With the recent advances in catheter interventions, hybrid procedures combining catheter intervention with ThoraCAB or TECAB are anticipated in the future.On the other hand, with the decrease in number of coronary artery bypass surgeries, the share of valvular surgeries is expected to increase in the future. Among them, mitral valvuloplasty for mitral regurgitation is anticipated to be conducted mainly by low-invasive procedures, represented by minimally invasive cardiac surgery( MICS) and robot-assisted surgery. Apart from the intrinsic good surgical view, robotic-assisted systems offer additional advantages of the availability of an amplified view and the easy to observe the mitral valve in the physiological position. Thus, robotic surgical surgeries that make complicated procedures easier are expected to accomplish further developments in the future. Furthermore, while the number of surgeries for atrial septal defects has decreased dramatically following the widespread use of Amplatzer septal occluder, robotic surgery may become a good indication for cases in which the Amplatzer device is not indicated. In Japan, clinical trial of the da Vinci robotic system for heart surgeries has been completed. Statutory approval of the da Vinci system for mitral regurgitation and atrial septal defects is anticipated in the next few years.

  4. ToolNet: Holistically-Nested Real-Time Segmentation of Robotic Surgical Tools

    OpenAIRE

    Garcia-Peraza-Herrera, Luis C.; Li, Wenqi; Fidon, Lucas; Gruijthuijsen, Caspar; Devreker, Alain; Attilakos, George; Deprest, Jan; Poorten, Emmanuel Vander; Stoyanov, Danail; Vercauteren, Tom; Ourselin, Sebastien

    2017-01-01

    Real-time tool segmentation from endoscopic videos is an essential part of many computer-assisted robotic surgical systems and of critical importance in robotic surgical data science. We propose two novel deep learning architectures for automatic segmentation of non-rigid surgical instruments. Both methods take advantage of automated deep-learning-based multi-scale feature extraction while trying to maintain an accurate segmentation quality at all resolutions. The two proposed methods encode ...

  5. [Controlling instruments in radiology].

    Science.gov (United States)

    Maurer, M

    2013-10-01

    Due to the rising costs and competitive pressures radiological clinics and practices are now facing, controlling instruments are gaining importance in the optimization of structures and processes of the various diagnostic examinations and interventional procedures. It will be shown how the use of selected controlling instruments can secure and improve the performance of radiological facilities. A definition of the concept of controlling will be provided. It will be shown which controlling instruments can be applied in radiological departments and practices. As an example, two of the controlling instruments, material cost analysis and benchmarking, will be illustrated.

  6. Ocean Optics Instrumentation Systems

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Provides instrumentation suites for a wide variety of measurements to characterize the ocean’s optical environment. These packages have been developed to...

  7. Networked Instrumentation Element

    Data.gov (United States)

    National Aeronautics and Space Administration — Armstrong researchers have developed a networked instrumentation system that connects modern experimental payloads to existing analog and digital communications...

  8. Satellite oceanography - The instruments

    Science.gov (United States)

    Stewart, R. H.

    1981-01-01

    It is pointed out that no instrument is sensitive to only one oceanographic variable; rather, each responds to a combination of atmospheric and oceanic phenomena. This complicates data interpretation and usually requires that a number of observations, each sensitive to somewhat different phenomena, be combined to provide unambiguous information. The distinction between active and passive instruments is described. A block diagram illustrating the steps necessary to convert data from satellite instruments into oceanographic information is included, as is a diagram illustrating the operation of a radio-frequency radiometer. Attention is also given to the satellites that carry the various oceanographic instruments.

  9. [Non-surgical treatment of hemorrhoids].

    Science.gov (United States)

    Libeskind, M

    1987-01-01

    The treatment of hemorrhoids includes a vast array of medical and instrumental means. If there is no true medical treatment, there are numerous products in order to act on the symptoms or one of the factors of the hemorrhoidal complex. Thus, phlebotonics, local topical agents, anti-infectious and anti-inflammatory agents, myorelaxants, transit regulators. Instrumental means are essentially represented by sclerosing injections, infra-red photocoagulation, cryotherapy, and mainly elastic rubber bands. All these treatments, some of which were offered as a substitute to surgery, often give interesting results, but are not devoid of danger. The attitude of the medico-surgical proctologist is then to find a happy medium between a procedure which is insufficient and one which may become unnecessarily aggressive.

  10. Optimizing Surgical Margins in Breast Conservation

    Directory of Open Access Journals (Sweden)

    Preya Ananthakrishnan

    2012-01-01

    Full Text Available Adequate surgical margins in breast-conserving surgery for breast cancer have traditionally been viewed as a predictor of local recurrence rates. There is still no consensus on what constitutes an adequate surgical margin, however it is clear that there is a trade-off between widely clear margins and acceptable cosmesis. Preoperative approaches to plan extent of resection with appropriate margins (in the setting of surgery first as well as after neoadjuvant chemotherapy, include mammography, US, and MRI. Improvements have been made in preoperative lesion localization strategies for surgery, as well as intraoperative specimen assessment, in order to ensure complete removal of imaging findings and facilitate margin clearance. Intraoperative strategies to accurately assess tumor and cavity margins include cavity shave techniques, as well as novel technologies for margin probes. Ablative techniques, including radiofrequency ablation as well as intraoperative radiation, may be used to extend tumor-free margins without resecting additional tissue. Oncoplastic techniques allow for wider resections while maintaining cosmesis and have acceptable local recurrence rates, however often involve surgery on the contralateral breast. As systemic therapy for breast cancer continues to improve, it is unclear what the importance of surgical margins on local control rates will be in the future.

  11. Electron temperature and density probe for small aeronomy satellites

    Energy Technology Data Exchange (ETDEWEB)

    Oyama, K.-I. [Plasma and Space Science Center, National Cheng Kung University, Tainan, Taiwan (China); Institute of Space and Plasma Sciences, National Cheng Kung University, Tainan, Taiwan (China); International Center for Space Weather Study and education, Kyushu University, Fukuoka (Japan); Hsu, Y. W.; Jiang, G. S.; Chen, W. H.; Liu, W. T. [Plasma and Space Science Center, National Cheng Kung University, Tainan, Taiwan (China); Cheng, C. Z.; Fang, H. K. [Plasma and Space Science Center, National Cheng Kung University, Tainan, Taiwan (China); Institute of Space and Plasma Sciences, National Cheng Kung University, Tainan, Taiwan (China)

    2015-08-15

    A compact and low power consumption instrument for measuring the electron density and temperature in the ionosphere has been developed by modifying the previously developed Electron Temperature Probe (ETP). A circuit block which controls frequency of the sinusoidal signal is added to the ETP so that the instrument can measure both T{sub e} in low frequency mode and N{sub e} in high frequency mode from the floating potential shift of the electrode. The floating potential shift shows a minimum at the upper hybrid resonance frequency (f{sub UHR}). The instrument which is named “TeNeP” can be used for tiny satellites which do not have enough conductive surface area for conventional DC Langmuir probe measurements. The instrument also eliminates the serious problems associated with the contamination of satellite surface as well as the sensor electrode.

  12. Electron temperature and density probe for small aeronomy satellites

    Science.gov (United States)

    Oyama, K.-I.; Hsu, Y. W.; Jiang, G. S.; Chen, W. H.; Cheng, C. Z.; Fang, H. K.; Liu, W. T.

    2015-08-01

    A compact and low power consumption instrument for measuring the electron density and temperature in the ionosphere has been developed by modifying the previously developed Electron Temperature Probe (ETP). A circuit block which controls frequency of the sinusoidal signal is added to the ETP so that the instrument can measure both Te in low frequency mode and Ne in high frequency mode from the floating potential shift of the electrode. The floating potential shift shows a minimum at the upper hybrid resonance frequency (fUHR). The instrument which is named "TeNeP" can be used for tiny satellites which do not have enough conductive surface area for conventional DC Langmuir probe measurements. The instrument also eliminates the serious problems associated with the contamination of satellite surface as well as the sensor electrode.

  13. Instrumentation and Fluorescent Chemistries Used in qPCR

    DEFF Research Database (Denmark)

    Josefsen, Mathilde Hartmann; Löfström, Charlotta; Hansen, Trine

    2012-01-01

    The polymerase chain reaction has revolutionized the world of scientific research and its broad application has caused a tremendous development of versatile PCR instruments and chemistries to fit its purpose. This chapter provides the reader with a general introduction to the basics of real-time ...... applied chemistries. The fluorophores and quenchers used for primer and probe labeling and their compatibility will be presented, and finally the future challenges and trends within the field of qPCR instrumentation will be discussed....

  14. Qualitative Analysis after Instrumentation Using Manual Stainless Steel and Rotary Nickel Titanium Instruments

    Directory of Open Access Journals (Sweden)

    Key Fabiano Souza PEREIRA

    2007-09-01

    Full Text Available Objective: To compare qualitatively the instrumentation (areastouched by the endodontic instruments with manual stainless steeland rotary nickel titanium files.Method: 32 mesiobuccal roots of maxillary molars with a singlecanal and a single apical foramen were examined in vitro. Thecanals were instrumented by the crown-down technique using Ktypefiles and taper .04 Profile files, obtaining a surgical diametercorresponding to a #30 instrument. Next, impression material wasinjected into the root canals. After material setting, the teeth weredecalcified to obtain canal impression. To evaluate the quality ofroot canal instrumentation, the images of the impressions weretransmitted to a 29-inch tv using a video camera coupled to anoperative microscope at ×20 magnification and moderate lightintensity. The examined surfaces were classified as EXCELLENT(smooth surfaces indicating that the walls were touched by theinstrument, GOOD (surfaces with irregularities and REGULAR(surfaces with irregularities, presence of anatomic complexities,like isthmuses, accessory canals, delta, etc.Results: The analysis of the root thirds and surfaces showed apredominance of the REGULAR classification of instrumentationfor both types of instruments. The worst results were found on thepalatal surface and apical third.Conclusion: There was no statistically significant difference(p>0.05 between the manual stainless steel and rotary nickeltitanium instrumentation techniques when the impressions of theroot thirds and surfaces were analyzed qualitatively.

  15. A cost evaluation methodology for surgical technologies.

    Science.gov (United States)

    Ismail, Imad; Wolff, Sandrine; Gronfier, Agnes; Mutter, Didier; Swanström, Lee L; Swantröm, Lee L

    2015-08-01

    To create and validate a micro-costing methodology that surgeons and hospital administrators can use to evaluate the cost of implementing innovative surgical technologies. Our analysis is broken down into several elements of fixed and variable costs which are used to effectively and easily calculate the cost of surgical operations. As an example of application, we use data from 86 robot assisted gastric bypass operations made in our hospital. To validate our methodology, we discuss the cost reporting approaches used in 16 surgical publications with respect to 7 predefined criteria. Four formulas are created which allow users to import data from their health system or particular situation and derive the total cost. We have established that the robotic surgical system represents 97.53 % of our operating room's medical device costs which amounts to $4320.11. With a mean surgery time of 303 min, personnel cost per operation amounts to $1244.73, whereas reusable instruments and disposable costs are, respectively, $1539.69 and $3629.55 per case. The literature survey demonstrates that the cost of surgery is rarely reported or emphasized, and authors who do cover this concept do so with variable methodologies which make their findings difficult to interpret. Using a micro-costing methodology, it is possible to identify the cost of any new surgical procedure/technology using formulas that can be adapted to a variety of operations and healthcare systems. We hope that this paper will provide guidance for decision makers and a means for surgeons to harmonise cost reporting in the literature.

  16. Instrumentation Design and Development Facilities

    Data.gov (United States)

    Federal Laboratory Consortium — RTTC has facilities for design, development and fabrication of: custominstrumentation, mobile instrumentation, miniaturized instrumentation, wirelessinstrumentation,...

  17. Surgical phantom for off-pump mitral valve replacement

    Science.gov (United States)

    McLeod, A. Jonathan; Moore, John; Guiraudon, Gerard M.; Jones, Doug L.; Campbell, Gordon; Peters, Terry M.

    2011-03-01

    Off-pump, intracardiac, beating heart surgery has the potential to improve patient outcomes by eliminating the need for cardiopulmonary bypass and aortic cross clamping but it requires extensive image guidance as well as the development of specialized instrumentation. Previously, developments in image guidance and instrumentation were validated on either a static phantom or in vivo through porcine models. This paper describes the design and development of a surgical phantom for simulating off-pump mitral valve replacement inside the closed beating heart. The phantom allows surgical access to the mitral annulus while mimicking the pressure inside the beating heart. An image guidance system using tracked ultrasound, magnetic instrument tracking and preoperative models previously developed for off-pump mitral valve replacement is applied to the phantom. Pressure measurements and ultrasound images confirm the phantom closely mimics conditions inside the beating heart.

  18. Suggested Tips and Tricks to Enhance Surgical Video Production.

    Science.gov (United States)

    Fisher, Nina; Kaplan, Daniel; Egol, Kenneth A

    2017-08-01

    Surgical video production is an important skill that can be of valuable use as an educational tool. However, it is important that surgical videos be filmed and edited in a methodological way to maximize its potential. In this video, we describe our preference for producing quality surgical videos. There are many important factors to consider during the filming process, including vantage point of the videographer, lighting, and visualization of instruments. During the editing process, certain techniques can be used to make the video more stimulating and thus more engaging to the viewer. This video presents the filming and editing of a single case. In addition, we provide examples of acceptable and poor footage and editing techniques. Surgical videos can be a valuable educational tool when properly executed. In this video, we describe techniques to ensure quality production.

  19. Avoidance-based human Pavlovian-to-instrumental transfer.

    Science.gov (United States)

    Lewis, Andrea H; Niznikiewicz, Michael A; Delamater, Andrew R; Delgado, Mauricio R

    2013-12-01

    The Pavlovian-to-instrumental transfer (PIT) paradigm probes the influence of Pavlovian cues over instrumentally learned behavior. The paradigm has been used extensively to probe basic cognitive and motivational processes in studies of animal learning. More recently, PIT and its underlying neural basis have been extended to investigations in humans. These initial neuroimaging studies of PIT have focused on the influence of appetitively conditioned stimuli on instrumental responses maintained by positive reinforcement, and highlight the involvement of the striatum. In the current study, we sought to understand the neural correlates of PIT in an aversive Pavlovian learning situation when instrumental responding was maintained through negative reinforcement. Participants exhibited specific PIT, wherein selective increases in instrumental responding to conditioned stimuli occurred when the stimulus signaled a specific aversive outcome whose omission negatively reinforced the instrumental response. Additionally, a general PIT effect was observed such that when a stimulus was associated with a different aversive outcome than was used to negatively reinforce instrumental behavior, the presence of that stimulus caused a non-selective increase in overall instrumental responding. Both specific and general PIT behavioral effects correlated with increased activation in corticostriatal circuitry, particularly in the striatum, a region involved in cognitive and motivational processes. These results suggest that avoidance-based PIT utilizes a similar neural mechanism to that seen with PIT in an appetitive context, which has implications for understanding mechanisms of drug-seeking behavior during addiction and relapse.

  20. An Ultrasonographic Periodontal Probe

    Science.gov (United States)

    Bertoncini, C. A.; Hinders, M. K.

    2010-02-01

    Periodontal disease, commonly known as gum disease, affects millions of people. The current method of detecting periodontal pocket depth is painful, invasive, and inaccurate. As an alternative to manual probing, an ultrasonographic periodontal probe is being developed to use ultrasound echo waveforms to measure periodontal pocket depth, which is the main measure of periodontal disease. Wavelet transforms and pattern classification techniques are implemented in artificial intelligence routines that can automatically detect pocket depth. The main pattern classification technique used here, called a binary classification algorithm, compares test objects with only two possible pocket depth measurements at a time and relies on dimensionality reduction for the final determination. This method correctly identifies up to 90% of the ultrasonographic probe measurements within the manual probe's tolerance.

  1. Hard probes 2006 Asilomar

    CERN Multimedia

    2006-01-01

    "The second international conference on hard and electromagnetic probes of high-energy nuclear collisions was held June 9 to 16, 2006 at the Asilomar Conference grounds in Pacific Grove, California" (photo and 1/2 page)

  2. BAA instrument no. 93

    Science.gov (United States)

    Marriott, R. A.

    2006-12-01

    Instrument no. 93 has been in almost continual use for more than a hundred years. Since it left the workshop of its maker, George Calver, it has kept company with several other notable instruments and has been used by many eminent astronomers. It was added to the Association's collection in 1945.

  3. Instrumentation in endourology

    OpenAIRE

    Khanna, Rakesh; Monga,Manoj

    2011-01-01

    Success with endourological procedures requires expertise and instrumentation. This review focuses on the instrumentation required for ureteroscopy and percutaneous nephrolithotomy, and provides a critical assessment of in vitro and clinical studies that have evaluated the comparative effectiveness of these medical devices.

  4. Fuzzy-logic-assisted surgical planning in adolescent idiopathic scoliosis.

    Science.gov (United States)

    Nault, Marie-Lyne; Labelle, Hubert; Aubin, Carl-Eric; Sangole, Archana; Balazinski, Marek

    2009-06-01

    Selection of appropriate curve fusion levels for surgery in adolescent idiopathic scoliosis (AIS) is a complex and difficult task and, despite numerous publications, still remains a highly controversial topic. To evaluate a fuzzy-logic-based surgical planning tool by comparing the results suggested by the software with the average outcome recommended by a panel of 5 expert spinal deformity surgeons. It is hypothesized that, given the same information, the fuzzy-logic tool will perform as favorably as the surgeons. Proof-of-concept study evaluating the use of a fuzzy-logic-assisted surgical planning tool in AIS to select the appropriate spinal curve to be instrumented. A cohort of 30 AIS surgical cases with a main thoracic curve was used. Each case included standard measurements recorded from preoperative standing postero-anterior and lateral, supine side bending, and 1-year postoperative standing radiographs. Five experienced spinal deformity surgeons evaluated each case independently and gave their preferred levels of instrumentation and fusion. The cases were then presented to the fuzzy-logic tool to determine whether the high thoracic and/or lumbar curves were to be instrumented. For each case, a percentage value was obtained indicating inclusion/exclusion of the respective curves in the surgical instrumentation procedure. Kappa statistics was used to compare the model output and the average decision of the surgeons. Kappa values of 0.71 and 0.64 were obtained, respectively, for the proximal thoracic and lumbar curves models, thus suggesting a good agreement of the fusion recommendations made by the fuzzy-logic tool and the surgeons. Given the same information, the fuzzy-logic-assisted recommendation of the curve to be instrumented compared favorably with the collective decision of the surgeons. The findings thus suggest that a fuzzy-logic approach is helpful in assisting surgeons with the preoperative selection of curve instrumentation and fusion levels in AIS.

  5. Vitiligo- A surgical approach

    Directory of Open Access Journals (Sweden)

    Deepti Ghia

    2012-01-01

    Full Text Available Aims and objective- To describe the spectrum of surgical modalities for stable vitiligo patients Methods- Patients having stable vitiligo since past 2 years with no improvement with medical line of treatment were enrolled for surgery after informed consent. Depending upon the size and location of vitiligo patch different modalities were performed. Suction blister, mini-punch grafting, split thickness skin grafting, trypsinised melanocyte-keratinocyte transfer and non-trypsinised melanocyte- keratinocyte transfer (Jodhpur technique and follicular grafting technique have been described photographically which have been performed at a tertiary care hospital. Conclusion- Vitiligo is often difficult to treat, stable patches resistant to medical line of management do respond to surgical treatment; however it is very important to choose the modality of surgery according location of the patch, size of the lesion and available resources.

  6. Spacecraft surgical scrub system

    Science.gov (United States)

    Abbate, M.

    1980-01-01

    Ease of handling and control in zero gravity and minimizing the quantity of water required were prime considerations. The program tasks include the selection of biocidal agent from among the variety used for surgical scrub, formulation of a dispensing system, test, and delivery of flight dispensers. The choice of an iodophore was based on effectiveness on single applications, general familiarity among surgeons, and previous qualification for space use. The delivery system was a choice between the squeeze foamer system and impregnated polyurethane foam pads. The impregnated foam pad was recommended because it is a simpler system since the squeeze foamer requires some applicator to effectively clean the skin surfaces, whereas the form pad is the applicator and agent combined. Testing demonstrated that both systems are effective for use as surgical scrubs.

  7. Gossypiboma—Retained Surgical Sponge

    Directory of Open Access Journals (Sweden)

    Hung-Shun Sun

    2007-11-01

    Full Text Available Intra-abdominal retained surgical sponge is an uncommon surgical error. Herein, we report a 92-year-old woman who was brought to the emergency room for acute urinary retention. She had a history of vaginal hysterectomy for uterine prolapse 18 years previously, performed at our hospital. Retained surgical sponge in the pelvic cavity was suspected by abdominal computed tomography. The surgical gauze was removed by laparotomy excision and the final diagnosis was gossypiboma.

  8. Hepatic surgical anatomy.

    Science.gov (United States)

    Skandalakis, John E; Skandalakis, Lee J; Skandalakis, Panajiotis N; Mirilas, Petros

    2004-04-01

    The liver, the largest organ in the body, has been misunderstood at nearly all levels of organization, and there is a tendency to ignore details that do not fit the preconception. A complete presentation of the surgical anatomy of the liver includes the study of hepatic surfaces, margins, and fissures; the various classifications of lobes and segments; and the vasculature and lymphatics. A brief overview of the intrahepatic biliary tract is also presented.

  9. Postoperative Surgical Infection After Spinal Surgery in Rheumatoid Arthritis.

    Science.gov (United States)

    Koyama, Kensuke; Ohba, Tetsuro; Ebata, Shigeto; Haro, Hirotaka

    2016-05-01

    Individuals with rheumatoid arthritis are at higher risk for infection than the general population, and surgical site infection after spinal surgery in this population can result in clinically significant complications. The goal of this study was to identify risk factors for acute surgical site infection after spinal surgery in patients with rheumatoid arthritis who were treated with nonbiologic (conventional) disease-modifying antirheumatic drugs (DMARDs) alone or with biologic DMARDs. All patients treated with biologic agents were treated with nonbiologic agents as well. The authors performed a retrospective, single-center review of 47 consecutive patients with rheumatoid arthritis who underwent spinal surgery and had follow-up of 3 months or longer. The incidence of surgical site infection was examined, and multivariate logistic regression analysis was performed to test the association of surgical site infection with putative risk factors, including the use of biologic agents, methotrexate, and prednisolone, as well as the duration of rheumatoid arthritis, the presence of diabetes, patient age, length of surgery, and number of operative levels. After spinal surgery, 14.89% (7 of 47) of patients had surgical site infection. Use of methotrexate and/or prednisolone, patient age, diabetes, duration of rheumatoid arthritis, length of surgery, number of operative levels, and use of biologic DMARDs did not significantly increase the risk of infection associated with spinal surgery. All patients who had surgical site infection had undergone spinal surgery with instrumentation. The findings show that greater attention to preventing surgical site infection may be needed in patients with rheumatoid arthritis who undergo spinal surgery with instrumentation. To the authors' knowledge, this is the first study to show that the use of biologic agents did not increase the incidence of surgical site infection after spinal surgery in patients with rheumatoid arthritis

  10. Louis Pasteur surgical revolution.

    Science.gov (United States)

    Toledo-Pereyra, Luis H

    2009-01-01

    Louis Pasteur (1822-1895) is considered the most notable medical scientist of his time and perhaps one of the most distinguished of all times in the history of medicine. From Dole in France to Paris, from a student of crystals to "living ferments," and from chemistry to biology and medicine, Pasteur changed the world for the benefit of humanity. The genius of Pasteur dealt with the most pressing issues of his time, basing the germ theory on the effects that microorganisms had on fermentation and putrefaction of organic matter, which gave birth to the science of bacteriology. Many other difficult problems in medicine and biology were tackled by Pasteur, culminating in the spectacular results seen with the treatment of rabies. Surgery was no exception to the scientific conquests of Pasteur. The transformation of the surgical world arose from the antiseptic concepts of Lister that were based on the germ theory of the disease, which had been derived from the germ theory of fermentation and putrefaction discovered by Pasteur. The acceptance of these principles represented the surgical revolution brought on by the science of Pasteur, a revolution that is now accepted in our daily care of surgical patients.

  11. Guideline implementation: Surgical attire.

    Science.gov (United States)

    Cowperthwaite, Liz; Holm, Rebecca L

    2015-02-01

    Surgical attire helps protect patients from microorganisms that may be shed from the hair and skin of perioperative personnel. The updated AORN "Guideline for surgical attire" provides guidance on scrub attire, shoes, head coverings, and masks worn in the semirestricted and restricted areas of the perioperative setting, as well as how to handle personal items (eg, jewelry, backpacks, cell phones) that may be taken into the perioperative suite. This article focuses on key points of the guideline to help perioperative personnel adhere to facility policies and regulatory requirements for attire. The key points address the potential benefits of wearing scrub attire made of antimicrobial fabric, covering the arms when in the restricted area of the surgical suite, removing or confining jewelry when wearing scrub attire, disinfecting personal items that will be taken into the perioperative suite, and sending reusable attire to a health care-accredited laundry facility after use. Perioperative RNs should review the complete guideline for additional information and for guidance when writing and updating policies and procedures.

  12. Dr. Harry Whelan With the Light Emitting Diode Probe

    Science.gov (United States)

    1999-01-01

    The red light from the Light Emitting Diode (LED) probe shines through the fingers of Dr. Harry Whelan, a pediatric neurologist at the Children's Hospital of Wisconsin in Milwaukee. Dr. Whelan uses the long waves of light from the LED surgical probe to activate special drugs that kill brain tumors. Laser light previously has been used for this type of surgery, but the LED light illuminates through all nearby tissues, reaching parts of tumors that shorter wavelengths of laser light carnot. The new probe is safer because the longer wavelengths of light are cooler than the shorter wavelengths of laser light, making the LED less likely to injure normal brain tissue near the tumor. Also, it can be used for hours at a time while still remaining cool to the touch. The probe was developed for photodynamic cancer therapy under a NASA Small Business Innovative Research Program grant. The program is part of NASA's Technology Transfer Department at the Marshall Space Flight Center.

  13. Manual Control for Medical Instruments in Minimally Invasive Surgery

    NARCIS (Netherlands)

    Fan, C.

    2014-01-01

    With the introduction of new technologies, surgical procedures have been varying from free access in open surgery towards limited access in minimal invasive surgery. During such procedures, surgeons have to manoeuver the instruments from outside the patient while looking at the monitor. Long and sle

  14. The modern trends in space electromagnetic instrumentation

    Science.gov (United States)

    Korepanov, V. E.

    The future trends of the experimental plasma physics development in outer space demand more and more exact and sophisticated scientific instrumentation. Moreover, the situation is complicated by constant reduction of financial support of scientific research, even in leading countries. This resulted in the development of mini; micro and nanosatellites with low price and short preparation time. Consequently, it provoked the creation of new generation of scientific instruments with reduced weight and power consumption but increased level of metrological parameters. The recent state of the development of electromagnetic (EM) sensors for microsatellites is reported. For flux-gate magnetometers (FGM) the reduction of weight as well as power consumption was achieved not only due to the use of new electronic components but also because of the new operation mode development. The scientific and technological study allowed to decrease FGM noise and now the typical noise figure is about 10 picotesla rms at 1 Hz and the record one is below 1 picotesla. The super-light version of search-coil magnetometers (SCM) was created as the result of intensive research. These new SCMs can have about six decades of operational frequency band with upper limit ˜ 1 MHz and noise level of few femtotesla with total weight about 75 grams, including electronics. A new instrument.- wave probe (WP) - which combines three independent sensors in one body - SCM, split Langmuir probe and electric potential sensor - was created. The developed theory confirms that WP can directly measure the wave vector components in space plasmas.

  15. Debridement for surgical wounds.

    Science.gov (United States)

    Dryburgh, Nancy; Smith, Fiona; Donaldson, Jayne; Mitchell, Melloney

    2008-07-16

    Surgical wounds that become infected are often debrided because clinicians believe that removal of this necrotic or infected tissue will expedite wound healing. There are numerous methods available but no consensus on which one is most effective for surgical wounds. The aim of this review is to determine the effect of different methods of debridement on the rate of debridement and healing of surgical wounds. We developed a search strategy to search the following electronic databases: Wounds Group Specialised Trials Register (searched 3/3/08) , Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library, 2008, issue 1), MEDLINE (1950 to February Week 3 2008 ), EMBASE (1980 to 2008 Week 09) and CINHAL (1982 to February Week 4 2008). We checked the citations within obtained studies to identify additional papers and also relevant conference proceedings. We contacted manufactures of wound debridement agents to ascertain the existence of published, unpublished and ongoing trials. Our search was not limited by language or publication status. We included relevant randomised controlled trials (RCT) with outcomes including at least one of the following: time to complete debridement, or time to complete healing. Two authors independently reviewed the abstracts and titles obtained from the search, two extracted data independently using a standardised extraction sheet, and two independently assessed methodological quality. One author was involved in all stages of the data collection and extraction process, thus ensuring continuity. Five RCTs were eligible for inclusion; all compared treatments for infected surgical wounds and reported time required to achieve a clean wound bed (complete debridement). One trial compared an enzymatic agent (Streptokinase/streptodornase) with saline-soaked dressings and reported the time to complete debridement. Four of the trials compared the effectiveness of dextranomer beads or paste with other products (different comparator

  16. Solar extreme ultraviolet sensor and advanced langmuir probe

    Science.gov (United States)

    Voronka, N. R.; Block, B. P.; Carignan, G. R.

    1992-01-01

    For more than two decades, the staff of the Space Physics Research Laboratory (SPRL) has collaborated with the Goddard Space Flight Center (GSFC) in the design and implementation of Langmuir probes (LP). This program of probe development under the direction of Larry Brace of GSFC has evolved methodically with innovations to: improve measurement precision, increase the speed of measurement, and reduce the weight, size, power consumption and data rate of the instrument. Under contract NAG5-419 these improvements were implemented and are what characterize the Advanced Langmuir Probe (ALP). Using data from the Langmuir Probe on the Pioneer Venus Orbiter, Brace and Walter Hoegy of GSFC demonstrated a novel method of monitoring the solar extreme ultraviolet (EUV) flux. This led to the idea of developing a sensor similar to a Langmuir probe specifically designed to measure solar EUV (SEUV) that uses a similar electronics package. Under this contract, a combined instrument package of the ALP and SEUV sensor was to be designed, constructed, and laboratory tested. Finally the instrument was to be flight tested as part of sounding rocket experiment to acquire the necessary data to validate this method for possible use in future earth and planetary aeronomy missions. The primary purpose of this contract was to develop the electronics hardware and software for this instrument, since the actual sensors were suppied by GSFC. Due to budget constraints, only a flight model was constructed. These electronics were tested and calibrated in the laboratory, and then the instrument was integrated into the rocket payload at Wallops Flight Facility where it underwent environmental testing. After instrument recalibration at SPRL, the payload was reintegrated and launched from the Poker Flat Research Range near Fairbanks Alaska. The payload was successfully recovered and after refurbishment underwent further testing and developing to improve its performance for future use.

  17. The effect of music on robot-assisted laparoscopic surgical performance.

    Science.gov (United States)

    Siu, Ka-Chun; Suh, Irene H; Mukherjee, Mukul; Oleynikov, Dmitry; Stergiou, Nick

    2010-12-01

    Music is often played in the operating room to increase the surgeon's concentration and to mask noise. It could have a beneficial effect on surgical performance. Ten participants with limited experience with the da Vinci robotic surgical system were recruited to perform two surgical tasks: suture tying and mesh alignment when classical, jazz, hip-hop, and Jamaican music were presented. Kinematics of the instrument tips of the surgical robot and surface electromyography of the subjects were recorded. Results revealed that a significant music effect was found for both tasks with decreased time to task completion (P = .005) and total travel distance (P = .021) as well as reduced muscle activations ( P = .016) and increased median muscle frequency (P = .034). Subjects improved their performance significantly when they listened to either hip-hop or Jamaican music. In conclusion, music with high rhythmicity has a beneficial effect on robotic surgical performance. Musical environment may benefit surgical training and make acquisition of surgical skills more efficient.

  18. Management of postoperative instrumented spinal wound infection

    Institute of Scientific and Technical Information of China (English)

    FANG Xiu-tong; Kirkham B.Wood

    2013-01-01

    Background Wound infection following spinal instrumented surgery is a frequent complication.The optimal treatment of acute deep wound infection following spinal instrumentation fusion remains controversial because of variability in cohort identification,definition of an infection,and the instrument used to measure outcomes.This retrospective study evaluated the clinical curative effect for postoperative spinal infection after instrumented spine fusion with extensive debridement,or implant removal.Methods From January 2004 to October 2009,851 patients were identified who underwent surgical treatment of spinal diseases.The medical records of patients who developed infections were reviewed in detail.Results Of 851 patients,41 (4.9%) developed an infection.Thirty-three were acute,and eight were delayed.Acute infected cases were managed with antibiotic therapy,and aggressive debridement of the wound and soft tissues leaving all instrumentation in situ in all but one patient.The most common symptoms of acute infection included:posterior incisional drainage (26 of 33 patients),back pain (22 of 33 patients) and fever (13 of 33 patients).Among patients with delayed onset infection,five of eight patients had local pain,four of eight patients had incision drainage,and one patient had a prolonged period of intermittent fever.The most frequent causative organism for postoperative spinal infection following spine surgery is Staphylococcus aureus.Pseudarthrosis was noted in long-term follow-up in four of 41 patients.Conclusions We recommend irrigation and debridement,no instrumentation removal,and,if necessary,repeat debridement followed by delayed primary closure for the treatment of acute deep infection with instrumentation.

  19. Endoscopic vidian neurectomy assisted by power instrumentation and coblation.

    Science.gov (United States)

    Hsu, Chao-Yuan; Shen, Ping-Hung; Weitzel, Erik Kent

    2013-09-01

    Vidian neurectomy has been used to manage intractable vasomotor rhinitis for decades. After the introduction of endoscopic sinus surgery in the 1980s, transnasal endoscopic vidian neurectomy (EVN) was subsequently reported. The most common problem in performing EVN was excessive bleeding from the pterygopalatine fossa. The complexity and vascularity of the pterygopalatine fossa can cause bloody surgical fields and prevent complete neurectomy. In response to this surgical problem, a procedure was developed to use powered instrumentation and coblation during EVN. There were eight cases of EVNs (16 neurectomies) assisted by power instrumentation and coblation from December 2011 to May 2012. The average blood loss of these cases was 37.5 mL (range, 25-50 mL). The average surgical time of each neurectomy was 27.4 minutes (range, 20-35 minutes). No complications occurred in any of the eight cases. Very limited bleeding and less thermal damage were noted while achieving a complete neurectomy.

  20. Surgical Tourniquets in Orthopaedics

    Science.gov (United States)

    2009-12-01

    much the pressure could be reduced by ap- plying a wide contoured cuff instead of a standard cuff 26. Pa- tients undergoing foot and ankle surgery...risk factor50. In the setting of intramedullary instrumentation, cementation, or insertion of a prosthesis in the lower limb, deflation of a pneumatic

  1. The importance of protecting surgical instrument tables from intraoperative contamination in clean surgeries Importancia de la protección de la mesa de instrumentos quirúrgicos en la contaminación intraoperatoria de cirugías limpias Importância da proteção da mesa de instrumentais cirúrgicos na contaminação intraoperatória de cirurgias limpas

    Directory of Open Access Journals (Sweden)

    Aline Mesquita Amaral

    2013-02-01

    Full Text Available OBJECTIVE: to compare the degree of bacterial contamination of surgical instrument tables used in clean surgical procedures, either protected with plastic fields, sterilized with ethylene oxide, or disinfected with 70% alcohol and 1% iodine solutions. This is a randomized clinical trial in which samples were collected from the surfaces of surgical instrument tables before and after each procedure. Microbiological analysis was performed to identify microorganisms and their respective antimicrobial resistance. RESULTS: Bacterial growth in the surgeries using sterilized plastic was 5.71% before and 28.6% after surgery and, 2.9% and 45.7% respectively in surgeries using disinfection with 70% alcohol and 1% iodine solutions; no statistical difference was found between the methods. CONCLUSION: both methods present similar protection, however, 70% alcohol and 1% iodine do not generate solid waste.El objetivo del estudio fue analizar el grado de contaminación bacteriana de la mesa de instrumentos quirúrgicos en dos casos, después del uso: cubierta protectora plástico de la mesa quirúrgica esterilizada con óxido de etileno o desinfección con solución de alcohol a 70% y yodo a 1%, en procedimientos quirúrgicos limpios. Se trata de un experimento clínico aleatorio, con recolección de muestras de las superficies de las mesas de instrumentos quirúrgicos, antes y después de cada procedimiento, con posterior análisis microbiológica para identificar los microorganismos y la resistencia antimicrobiana. En las cirugías en que el plástico esterilizado fue utilizado, el crecimiento bacteriano fue de 5,71% antes y 28,6% después de la cirugía, en cuanto que en las desinfecciones con solución de alcohol a 70% y yodo a 1%, el crecimiento fue de 2,9% antes y 45,7% después, lo que indica que no hubo diferencia significativa entre los métodos empleados. Los dos métodos tienen poder de protección semejante, considerando que el alcohol a 70% y yodo a

  2. Microball lens integrated fiber probe for optical frequency domain imaging

    Institute of Scientific and Technical Information of China (English)

    Jae-Ho Han; J.U.Kang

    2011-01-01

    An integrated microball lens fiber catheter probe is demonstrated, which has better lateral resolution and longer working distance than a corresponding bare fiber probe with diverging beam for Fourier domain optical coherence tomography (FDOCT). Simulation results are shown to gain the effect of the distance between the microball lens and the bare fiber to the focusing plane and beam width. The freedom of modifying the working distance and lateral resolution is shown. This is achieved by changing the gap distance between the single-mode fiber and the microball lens within the packaged surgical needle catheter without using an additional beam expander having a fixed length. The probe successfully acquired cross-sectional images of ocular tissues from an animal sample with the proposed miniaturized imaging probe.%@@ An integrated microball lens fiber catheter probe is demonstrated,which has better lateral resolution and longer working distance than a corresponding bare fiber probe with diverging beam for Fourier domain optical coherence tomography(FDOCT).Simulation results are shown to gain the effect of the distance between the microball lens and the bare fiber to the focusing plane and beam width.The freedom of modifying the working distance and lateral resolution is shown.This is achieved by changing the gap distance between the single-mode fiber and the microball lens within the packaged surgical needle catheter without using an additional beam expander having a fixed length.The probe successfully acquired crosssectional images of ocular tissues from an animal sample with the proposed miniaturized imaging probe.

  3. [Changing surgical therapy because of clinical studies?].

    Science.gov (United States)

    Schwenk, W; Haase, O; Müller, J M

    2002-04-01

    The randomised controlled clinical trial (RCT) is a powerful instrument to evaluate different therapeutic regimens. In a survey among 115 physicians visiting the 25th annual meeting of the Surgical Society of Berlin and Brandenburg, the RCT was judged to be very important when changes of therapeutic strategies are discussed. 90 % of all participants claimed to use data from RCTs in the clinical routine and 89 % would participate in such a trial. In official (e. g. discussions during coffee breaks at scientific meetings) or non-medical (e. g. non-scientific press or media) sources of information were assessed as irrelevant for decisions regarding therapeutic strategies. However, in contrast to this view laparoscopic cholecystectomy was introduced into clinical practice rapidly because patients informed by external (non-medical) sources preferred to be operated on with the "modern" technique. Clinical trials with a high level of evidence had no relevant influence on the rapid distribution of laparoscopic cholecystectomy. Controversial discussions concerning the extent of lymphadenectomy with gastric resection for carcinoma demonstrate that the value of excellent clinical RCTs is low if their results challenge a stable paradigma of the surgical scientific society. To allow a rational judgement, new surgical technologies should undergo a scientific gradual evaluation in agreement with the principles of evidence based medicine.

  4. New Frontiers in Surgical Innovation.

    Science.gov (United States)

    Jackson, Ryan S; Schmalbach, Cecelia E

    2017-08-01

    It is an exciting time for head and neck surgical innovation with numerous advances in the perioperative planning and intraoperative management of patients with cancer, trauma patients, and individuals with congenital defects. The broad and rapidly changing realm of head and neck surgical innovation precludes a comprehensive summary. This article highlights some of the most important innovations from surgical planning with sentinel node biopsy and three-dimensional, stereolithic modeling to intraoperative innovations, such as transoral robotic surgery and intraoperative navigation. Future surgical innovations, such as intraoperative optical imaging of surgical margins, are also highlighted. Copyright © 2017 Elsevier Inc. All rights reserved.

  5. Instrumentation reference book

    CERN Document Server

    Boyes, Walt

    2002-01-01

    Instrumentation is not a clearly defined subject, having a 'fuzzy' boundary with a number of other disciplines. Often categorized as either 'techniques' or 'applications' this book addresses the various applications that may be needed with reference to the practical techniques that are available for the instrumentation or measurement of a specific physical quantity or quality. This makes it of direct interest to anyone working in the process, control and instrumentation fields where these measurements are essential.* Comprehensive and authoritative collection of technical information* Writte

  6. Jones' instrument technology

    CERN Document Server

    Jones, Ernest Beachcroft; Kingham, Edward G; Radnai, Rudolf

    1985-01-01

    Jones' Instrument Technology, Volume 5: Automatic Instruments and Measuring Systems deals with general trends in automatic instruments and measuring systems. Specific examples are provided to illustrate the principles of such devices. A brief review of a considerable number of standards is undertaken, with emphasis on the IEC625 Interface System. Other relevant standards are reviewed, including the interface and backplane bus standards. This volume is comprised of seven chapters and begins with a short introduction to the principles of automatic measurements, classification of measuring system

  7. Medical instruments in museums

    DEFF Research Database (Denmark)

    Söderqvist, Thomas; Arnold, Ken

    2011-01-01

    This essay proposes that our understanding of medical instruments might benefit from adding a more forthright concern with their immediate presence to the current historical focus on simply decoding their meanings and context. This approach is applied to the intriguingly tricky question of what...... actually is meant by a "medical instrument." It is suggested that a pragmatic part of the answer might lie simply in reconsidering the holdings of medical museums, where the significance of the physical actuality of instruments comes readily to hand....

  8. Mass spectrometers: instrumentation

    Science.gov (United States)

    Cooks, R. G.; Hoke, S. H., II; Morand, K. L.; Lammert, S. A.

    1992-09-01

    Developments in mass spectrometry instrumentation over the past three years are reviewed. The subject is characterized by an enormous diversity of designs, a high degree of competition between different laboratories working with either different or similar techniques and by extremely rapid progress in improving analytical performance. Instruments can be grouped into genealogical charts based on their physical and conceptual interrelationships. This is illustrated using mass analyzers of different types. The time course of development of particular instrumental concepts is illustrated in terms of the s-curves typical of cell growth. Examples are given of instruments which are at the exponential, linear and mature growth stages. The prime examples used are respectively: (i) hybrid instruments designed to study reactive collisions of ions with surfaces: (ii) the Paul ion trap; and (iii) the triple quadrupole mass spectrometer. In the area of ion/surface collisions, reactive collisions such as hydrogen radical abstraction from the surface by the impinging ion are studied. They are shown to depend upon the chemical nature of the surface through the use of experiments which utilize self-assembled monolayers as surfaces. The internal energy deposited during surface-induced dissociation upon collision with different surfaces in a BEEQ instrument is also discussed. Attention is also given to a second area of emerging instrumentation, namely technology which allows mass spectrometers to be used for on-line monitoring of fluid streams. A summary of recent improvements in the performance of the rapidly developing quadrupole ion trap instrument illustrates this stage of instrument development. Improvements in resolution and mass range and their application to the characterization of biomolecules are described. The interaction of theory with experiment is illustrated through the role of simulations of ion motion in the ion trap. It is emphasized that mature instruments play a

  9. Biomedical Sensors and Instruments

    CERN Document Server

    Tagawa, Tatsuo

    2011-01-01

    The living body is a difficult object to measure: accurate measurements of physiological signals require sensors and instruments capable of high specificity and selectivity that do not interfere with the systems under study. As a result, detailed knowledge of sensor and instrument properties is required to be able to select the "best" sensor from one of the many designed to meet these challenges. From the underlying principles to practical applications, this updated edition of Biomedical Sensors and Instruments provides an easy-to-understand introduction to the various kinds of biome

  10. Surgical fidelity: comparing the microscope and the endoscope.

    Science.gov (United States)

    Cote, Martin; Kalra, Ricky; Wilson, Taylor; Orlandi, Richard R; Couldwell, William T

    2013-12-01

    Both the microscope and the endoscope are widely used as visualization tools in neurosurgery; however, surgical dexterity when operating with each may differ. The aim of this study was to compare the surgical fidelity when using each of these visualization tools. Junior residents and expert surgeons performed standardized motor tasks under microscopic and endoscopic visualization. Demerits for inaccuracy and time needed to complete the tasks were used to compare the surgeons' performance with the microscope and the endoscope. The participants also performed a motor task under direct vision using different instruments to evaluate whether the shape of the instrument had any impact on the surgical fidelity. For the junior residents, the number of demerits accrued was lower with the microscope than with the endoscope, and the time needed to complete the tasks was also lower with the microscope. There was no difference in the number of demerits between the microscopic and the endoscopic experts, but the microscopic expert completed the task in a shorter time. There was no difference in demerits or performance time when comparing a short, straight instrument and a longer, bayoneted one. For junior residents, surgical fidelity is higher with the microscope than with the endoscope. This difference vanishes with experience, but a slower speed of execution is observed with endoscopic visualization, both in junior and expert surgeons.

  11. DynTG: A tool for Interactive, Dynamic Instrumentation

    Energy Technology Data Exchange (ETDEWEB)

    Schulz, M; May, J; Gyllenhaal, J

    2005-02-16

    With the increasing complexity of today's systems, detailed performance analysis is more important than ever. We have developed DynTG, a tool for interactive, dynamic instrumentation. It uses performance module plugins to reconfigure the data acquisition and provides a source browser that allows users to insert any probe functionality provided by the modules dynamically into the target application. Any instrumentation can be added both before and during the application's execution and the acquired data is presented in realtime within the source viewer. This enables users to monitor their applications' progress and interactively control and adapt the instrumentation based on their observations.

  12. 49 CFR 572.21 - Test conditions and instrumentation.

    Science.gov (United States)

    2010-10-01

    ...-Year-Old Child § 572.21 Test conditions and instrumentation. (a)(1) The test probe used for head and... a line connecting the longitudinal centerlines of the transfer pins in the side of the dummy head with the midsagittal plane of the dummy head. (1) The sensing elements of the Type C...

  13. 49 CFR 572.44 - Instrumentation and test conditions.

    Science.gov (United States)

    2010-10-01

    ... Impact Dummy 50th Percentile Male § 572.44 Instrumentation and test conditions. (a) The test probe used... installed in the dummy are then processed with the software for the Finite Impulse Response (FIR) filter... joints of the test dummy are set at the force between 1-2 g's, which just supports the limbs' weight...

  14. Luminescent probes for optical in vivo imaging

    Science.gov (United States)

    Texier, Isabelle; Josserand, Veronique; Garanger, Elisabeth; Razkin, Jesus; Jin, Zhaohui; Dumy, Pascal; Favrot, Marie; Boturyn, Didier; Coll, Jean-Luc

    2005-04-01

    Going along with instrumental development for small animal fluorescence in vivo imaging, we are developing molecular fluorescent probes, especially for tumor targeting. Several criteria have to be taken into account for the optimization of the luminescent label. It should be adapted to the in vivo imaging optical conditions : red-shifted absorption and emission, limited overlap between absorption and emission for a good signal filtering, optimized luminescence quantum yield, limited photo-bleaching. Moreover, the whole probe should fulfill the biological requirements for in vivo labeling : adapted blood-time circulation, biological conditions compatibility, low toxicity. We here demonstrate the ability of the imaging fluorescence set-up developed in LETI to image the bio-distribution of molecular probes on short times after injection. Targeting with Cy5 labeled holo-transferrin of subcutaneous TS/Apc (angiogenic murine breast carcinoma model) or IGROV1 (human ovarian cancer) tumors was achieved. Differences in the kinetics of the protein uptake by the tumors were evidenced. IGROV1 internal metastatic nodes implanted in the peritoneal cavity could be detected in nude mice. However, targeted metastatic nodes in lung cancer could only be imaged after dissection of the mouse. These results validate our fluorescence imaging set-up and the use of Cy5 as a luminescent label. New fluorescent probes based on this dye and a molecular delivery template (the RAFT molecule) can thus be envisioned.

  15. An airborne icing characterization probe: nephelometer prototype

    Science.gov (United States)

    Roques, S.

    2007-10-01

    The aeronautical industry uses airborne probes to characterize icing conditions for flight certification purposes by counting and sizing cloud droplets. Existing probes have been developed for meteorologists in order to study cloud microphysics. They are used on specific aircraft, instrumented for this type of study, but are not adapted for an industrial flight test environment. The development by Airbus of a new probe giving a real time response for particle sizes between 10 and 500 µm, adapted to operational requirements, is in progress. An optical principle by coherent shadowgraphy with a low coherency point source is used for the application. The size of the droplets is measured from their shadows on a CCD. A pulsed laser coupled to a fast camera freezes the movement. Usually, image processing rejects out-of-focus objects. Here, particles far from the focal plane can be sized because of the large depth of field due to the point source. The technique used increases the depth of field and the sampled volume is enough to build a histogram even for low droplet concentrations. Image processing is done in real time and results are provided to the flight test engineer. All data and images are recorded in order to allow on-ground complementary analysis if necessary. A non-telescopic prototype has been tested in a wind tunnel and in flight. The definitive probe being retractable is designed to be easily installed through a dummy window. Retracted, it will allow the aircraft to fly at VMO (maximum operating limit speed).

  16. [Intestinal occlusion secondary to a retained surgical item].

    Science.gov (United States)

    Balcázar-Rincón, Luis Ernesto; Gordillo Gómez, Enrique Alejandro; Ramírez-Alcántara, Yunis Lourdes

    Retained surgical items after a surgical procedure is a real, existing, and preventable problem that affects the safety of the surgical patient. Its incidence is not exactly known due to under-reporting of occurrence, due to the potential risk of lawsuits. A 31 year-old women that had an elective caesarean, apparently without complications. In the immediate post-operative period, clinical features appeared that were compatible with intestinal obstruction, such as inability to channel gas, bloating, abdominal pain and vigorous peristalsis. The diagnosis is made by the recent history of abdominal-pelvic surgery and the finding of a foreign body on a simple x-ray of the abdomen. The patient was operated upon, with a satisfactory outcome, and was discharged 5 days later. A retained surgical instrument is an under-reported event that represents a medical-legal problem, leading to various complications, including death if it is not diagnosed and treated early. It is important to know the risk factors and adopt a culture of prevention through perioperative monitoring of equipment and instruments used during the surgical act. Copyright © 2015 Academia Mexicana de Cirugía A.C. Publicado por Masson Doyma México S.A. All rights reserved.

  17. Analysis of surgical intervention populations using generic surgical process models.

    Science.gov (United States)

    Neumuth, Thomas; Jannin, Pierre; Schlomberg, Juliane; Meixensberger, Jürgen; Wiedemann, Peter; Burgert, Oliver

    2011-01-01

    According to differences in patient characteristics, surgical performance, or used surgical technological resources, surgical interventions have high variability. No methods for the generation and comparison of statistical 'mean' surgical procedures are available. The convenience of these models is to provide increased evidence for clinical, technical, and administrative decision-making. Based on several measurements of patient individual surgical treatments, we present a method of how to calculate a statistical 'mean' intervention model, called generic Surgical Process Model (gSPM), from a number of interventions. In a proof-of-concept study, we show how statistical 'mean' procedure courses can be computed and how differences between several of these models can be quantified. Patient individual surgical treatments of 102 cataract interventions from eye surgery were allocated to an ambulatory or inpatient sample, and the gSPMs for each of the samples were computed. Both treatment strategies are exemplary compared for the interventional phase Capsulorhexis. Statistical differences between the gSPMs of ambulatory and inpatient procedures of performance times for surgical activities and activity sequences were identified. Furthermore, the work flow that corresponds to the general recommended clinical treatment was recovered out of the individual Surgical Process Models. The computation of gSPMs is a new approach in medical engineering and medical informatics. It supports increased evidence, e.g. for the application of alternative surgical strategies, investments for surgical technology, optimization protocols, or surgical education. Furthermore, this may be applicable in more technical research fields, as well, such as the development of surgical workflow management systems for the operating room of the future.

  18. Modeling the hysteresis of a scanning probe microscope

    DEFF Research Database (Denmark)

    Dirscherl, Kai; Garnæs, Jørgen; Nielsen, L.

    2000-01-01

    Most scanning probe microscopes use piezoelectric actuators in open loop configurations. Therefore a major problem related to these instruments is the image distortion due to the hysteresis effect of the piezo. In order to eliminate the distortions, cost effective software control based on a model...

  19. Atom-Probe Measurements of Meteoritic Nanodiamonds and Terrestrial Standards

    Science.gov (United States)

    Lewis, J. B.; Isheim, D.; Floss, C.; Daulton, T. L.; Seidman, D. N.; Heck, P. R.; Davis, A. M.; Pellin, M. J.; Savina, M. R.; Hiller, J.; Mane, A.; Elam, J. W.; Stephan, T.

    2013-09-01

    We present new data from the novel application of atom-probe tomography to the study of nanodiamonds from the meteorite Allende. The mean meteoritic ^12C/^13C peak ratio is higher than that of our standards, but there are instrumental artifacts.

  20. Challenges in marine instrumentation

    Digital Repository Service at National Institute of Oceanography (India)

    Afzulpurkar, S.; Desa, E.; Joseph, A.; Chakraborty, B.; Nayak, M.R.; Ranade, G.

    . Acoustic and optical instrumentation combined on the same platform would be able to address these problems. For this autonomous vehicles with extremely low power requirements, long term deployment and data transmission capability via satellites after...

  1. UV and EUV Instruments

    CERN Document Server

    Werner, K

    2010-01-01

    We describe telescopes and instruments that were developed and used for astronomical research in the ultraviolet (UV) and extreme ultraviolet (EUV) regions of the electromagnetic spectrum. The wavelength ranges covered by these bands are not uniquely defined. We use the following convention here: The EUV and UV span the regions ~100-912 and 912-3000 Angstroem respectively. The limitation between both ranges is a natural choice, because the hydrogen Lyman absorption edge is located at 912 Angstroem. At smaller wavelengths, astronomical sources are strongly absorbed by the interstellar medium. It also marks a technical limit, because telescopes and instruments are of different design. In the EUV range, the technology is strongly related to that utilized in X-ray astronomy, while in the UV range the instruments in many cases have their roots in optical astronomy. We will, therefore, describe the UV and EUV instruments in appropriate conciseness and refer to the respective chapters of this volume for more technic...

  2. Fiber Optics Instrumentation Development

    Science.gov (United States)

    Chan, Patrick Hon Man; Parker, Allen R., Jr.; Richards, W. Lance

    2010-01-01

    This is a general presentation of fiber optics instrumentation development work being conducted at NASA Dryden for the past 10 years and recent achievements in the field of fiber optics strain sensors.

  3. Instrumentation for Materials Research

    Science.gov (United States)

    Claassen, Richard S.

    1976-01-01

    Discusses how sophisticated instrumentation techniques yield practical results in three typical materials problems: fracture analysis, joining, and compatibility. Describes techniques such as scanning and transmission electron microscopy, and Auger spectroscopy. (MLH)

  4. Hetdex: Virus Instrument

    Science.gov (United States)

    Lee, Hanshin; Hill, G. J.; DePoy, D. L.; Tuttle, S.; Marshall, J. L.; Vattiat, B. L.; Prochaska, T.; Chonis, T. S.; Allen, R.; HETDEX Collaboration

    2012-01-01

    The Visible Integral-field-unit Replicable Unit Spectrograph (VIRUS) instrument is made up of 150+ individually compact and identical spectrographs, each fed by a fiber integral-field unit. The instrument provides integral field spectroscopy at wavelengths between 350nm and 550nm of over 33,600 spatial elements per observation, each 1.8 sq. arcsec on the sky, at R 700. The instrument will be fed by a new wide-field corrector (WFC) of the Hobby-Eberly Telescope (HET) with increased science field of view as large as 22arcmin diameter and telescope aperture of 10m. This will enable the HETDEX, a large area blind survey of Lyman-alpha emitting galaxies at redshift z VIRUS instrument construction is summarized.

  5. Scanning probe microscopy at video-rate

    Directory of Open Access Journals (Sweden)

    Georg Schitter

    2008-01-01

    Full Text Available Recent results have demonstrated the feasibility of video-rate scanning tunneling microscopy and video-rate atomic force microscopy. The further development of this technology will enable the direct observation of many dynamic processes that are impossible to observe today with conventional Scanning Probe Microscopes (SPMs. Examples are atom and molecule diffusion processes, the motion of molecular motors, real-time film growth, and chemical or catalytic reactions. Video-rate scanning probe technology might also lead to the extended application of SPMs in industry, e.g. for process control. In this paper we discuss the critical aspects that have to be taken into account for improving the imaging speed of SPMs. We point out the required instrumentation efforts, give an overview of the state of the art in high-speed scanning technology and discuss the required future developments for imaging at video-rates.

  6. VIRUS instrument collimator assembly

    Science.gov (United States)

    Marshall, Jennifer L.; DePoy, Darren L.; Prochaska, Travis; Allen, Richard D.; Williams, Patrick; Rheault, Jean-Philippe; Li, Ting; Nagasawa, Daniel Q.; Akers, Christopher; Baker, David; Boster, Emily; Campbell, Caitlin; Cook, Erika; Elder, Alison; Gary, Alex; Glover, Joseph; James, Michael; Martin, Emily; Meador, Will; Mondrik, Nicholas; Rodriguez-Patino, Marisela; Villanueva, Steven; Hill, Gary J.; Tuttle, Sarah; Vattiat, Brian; Lee, Hanshin; Chonis, Taylor S.; Dalton, Gavin B.; Tacon, Mike

    2014-07-01

    The Visual Integral-Field Replicable Unit Spectrograph (VIRUS) instrument is a baseline array 150 identical fiber fed optical spectrographs designed to support observations for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The collimator subassemblies of the instrument have been assembled in a production line and are now complete. Here we review the design choices and assembly practices used to produce a suite of identical low-cost spectrographs in a timely fashion using primarily unskilled labor.

  7. Modeling of Musical Instruments

    Science.gov (United States)

    Bader, Rolf; Hansen, Uwe

    Signal processing techniques in acoustics address many concerns. Included are such things as wave propagation variables, amplitude considerations, spectral content, wavelength, and phase. Phase is primarily of concern when waves interact with each other, as well as with a medium, and the imposition of boundary conditions leads to normal mode vibrations. Such conditions are prevalent in all musical instruments, and thus relevant signal processing techniques are essential to both understanding and modeling the structure of musical instruments and the sound radiated.

  8. [Duane vertical surgical treatment].

    Science.gov (United States)

    Merino, M L; Gómez de Liaño, P; Merino, P; Franco, G

    2014-04-01

    We report 3 cases with a vertical incomitance in upgaze, narrowing of palpebral fissure, and pseudo-overaction of both inferior oblique muscles. Surgery consisted of an elevation of both lateral rectus muscles with an asymmetrical weakening. A satisfactory result was achieved in 2 cases, whereas a Lambda syndrome appeared in the other case. The surgical technique of upper-insertion with a recession of both lateral rectus muscles improved vertical incomitance in 2 of the 3 patients; however, a residual deviation remains in the majority of cases. Copyright © 2011 Sociedad Española de Oftalmología. Published by Elsevier Espana. All rights reserved.

  9. Diverticulitis: selective surgical management.

    Science.gov (United States)

    Rugtiv, G M

    1975-08-01

    The surgical treatment of complications of diverticulitis remains most challenging. A review of twenty years' experience with one hundred fifteen cases is presented with one proved anastomotic leak and no deaths. Interval primary resection with anastomosis for chronic recurrent disease including colovesical fistula and mesocolic abscess was proved sate with low morbidity. The three-stage procedure for perforated diverticulitis with spreading peritonitis or pericolic abscess was associated with a high rate of complications and morbidity. An aggressive approach with resection without anastomosis in two stages is indicated.

  10. TACTIC IN SURGICAL TREATMENT OF THORACIC IDIOPATHIC SCOLIOSIS IN CHILDREN

    Directory of Open Access Journals (Sweden)

    S. V. Vissarionov

    2010-01-01

    Full Text Available The results of surgical treatment of 263 patients with thoracic scoliosis from 13 to 18 years old with deformity 50-152° (Cobb are presented. It was used three tactical variants with dorsal instrumentation Cotrel-Dubousset (CDI. Operation correction in idiopathic thoracic scoliosis varies within in limits from 46,2 to 95%. Lost of correction in 10 years follow up period was 5,10-10,15%. Authors concluded that tactic of surgical treatment of idiopathic thoracic scoliosis should be individual and depends on patient's age, growth potential, and degree of deformation and mobility of the curve.

  11. The accuracy of determining ion parameters by means of a cylindrical Langmuir probe

    Science.gov (United States)

    Georgieva, K. Ia.; Kirov, B. B.; Kraleva, L. Kh.

    A method is presented whereby a cylindrical Langmuir probe can be used to obtain an estimate of the concentration distribution of two prevalent kinds of ions in space plasmas when their masses are known. In many cases, the use of a Langmuir probe can thus compensate for the absence of a mass spectrometer. The probe can also be used as a backup if the data obtained by other instruments are not dependable.

  12. Background radiation effects and hazards in planetary instrumentation

    Energy Technology Data Exchange (ETDEWEB)

    Butcher, Gillian [Space Research Centre, Michael Atiyah Building, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, (United Kingdom)]. E-mail: gib@star.le.ac.uk; Sims, Mark R. [Space Research Centre, Michael Atiyah Building, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, (United Kingdom); Fraser, George [Space Research Centre, Michael Atiyah Building, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, (United Kingdom); Klingelhoefer, Goestar [Institut fuer Anorganische und Analytische Chemie, Johannes-Gutenberg-Universitaet, Staudinger Weg 9, 55128 Mainz (Germany); Bernhardt, Bodo [Institut fuer Anorganische und Analytische Chemie, Johannes-Gutenberg-Universitaet, Staudinger Weg 9, 55128 Mainz (Germany); Davidson, Andrew [EADS Astrium, Gunnels Wood Road, Stevenage SG1 2AS, (United Kingdom)

    2006-08-01

    Recent and proposed future planetary missions are becoming increasingly concerned with detailed geochemical assessment, often in a bid to ascertain the presence of water and life supporting geochemical systems. The instruments involved may use some kind of radioactive source, e.g. X-ray fluorescence spectrometry, Moessbauer spectrometry, neutron scattering. Having radioactive sources on a lander/rover poses various potential problems, in regard to both safety to personnel involved in the building of the instrument and to radiation effects on spacecraft structure and on other instruments. Indeed background radiation effects from one instrument may dominate measurements in another resulting in loss of scientific performance. Drawing on experience with the Beagle 2 probe which contained two instruments with radioactive sources, we present a discussion on the management of radiation hazards and background effects posed by radioactive sources for such planetary missions.

  13. Instrumentation challenges in multi-modality imaging

    Energy Technology Data Exchange (ETDEWEB)

    Brasse, D., E-mail: david.brasse@iphc.cnrs.fr [Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, 23 rue du Loess 67037 Strasbourg (France); CNRS, UMR7178, 67037 Strasbourg (France); Boisson, F. [Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, 23 rue du Loess 67037 Strasbourg (France); CNRS, UMR7178, 67037 Strasbourg (France)

    2016-02-11

    Based on different physical principles, imaging procedures currently used in both clinical and preclinical applications present different performance that allow researchers to achieve a large number of studies. However, the relevance of obtaining a maximum of information relating to the same subject is undeniable. The last two decades have thus seen the advent of a full-fledged research axis, the multimodal in vivo imaging. Whether from an instrumentation point of view, for medical research or the development of new probes, all these research works illustrate the growing interest of the scientific community for multimodal imaging, which can be approached with different backgrounds and perspectives from engineers to end-users point of views. In the present review, we discuss the multimodal imaging concept, which focuses not only on PET/CT and PET/MRI instrumentation but also on recent investigations of what could become a possible future in the field.

  14. The efficacy of transgingival probing in class II buccal furcation defects treated by guided tissue regeneration

    Directory of Open Access Journals (Sweden)

    Monika Bansal

    2016-01-01

    Full Text Available Background: The objectives of the present study were to establish transgingival probing as an evaluating method in the clinical studies of periodontal regenerative techniques and to compare the effectiveness of transgingival probing to the surgical entry. Materials and Methods: Ten systemically healthy persons (20–50 years with moderate to severe chronic periodontitis participated in this study. These cases were recruited into the study only when they fulfilled the eligibility criteria. Vertical probing depth (VPD and horizontal probing depth (HPD of furcation defects were measured with and without opening the flap, following local anesthesia during initial surgery and at 6 months after collagen membrane placement. The defect fill (DF was also noted. The mean measurements of clinical parameters were compared by two-tailed paired t-test at 5% level of significance. Results: The difference between the measurements of VPD and HPD taken during transgingival probing and after opening the flap was lie in the range of 0.10–0.30 mm at the time of initial surgery and 6 months after surgery that was not statistically significant. Persons experienced slight discomfort or pain during opening the flap as compared to transgingival probing, and this method was also appreciated by the patients as it is easy, simple and does not involve the surgical procedure. Conclusion: The results of the study suggest that measurements recorded during transgingival probing and after opening the flap do not influence the required outcome of regenerative therapies, i.e., DF that was not statistically significant difference from surgical reentry. Therefore, it was concluded that transgingival probing could be used as evaluating parameters to see the outcome of regenerative surgeries and the surgical reentry procedure may be avoided because it is a second surgical procedure, time-consuming and interrupts the healing process.

  15. Two-Phase flow instrumentation for nuclear accidents simulation

    Science.gov (United States)

    Monni, G.; De Salve, M.; Panella, B.

    2014-11-01

    The paper presents the research work performed at the Energy Department of the Politecnico di Torino, concerning the development of two-phase flow instrumentation and of models, based on the analysis of experimental data, that are able to interpret the measurement signals. The study has been performed with particular reference to the design of power plants, such as nuclear water reactors, where the two-phase flow thermal fluid dynamics must be accurately modeled and predicted. In two-phase flow typically a set of different measurement instruments (Spool Piece - SP) must be installed in order to evaluate the mass flow rate of the phases in a large range of flow conditions (flow patterns, pressures and temperatures); moreover, an interpretative model of the SP need to be developed and experimentally verified. The investigated meters are: Turbine, Venturi, Impedance Probes, Concave sensors, Wire mesh sensor, Electrical Capacitance Probe. Different instrument combinations have been tested, and the performance of each one has been analyzed.

  16. DESIGN OF THE CONTACT POTENTIALS DIFFERENCE PROBES

    Directory of Open Access Journals (Sweden)

    K. U. Pantsialeyeu

    2016-01-01

    Full Text Available The contact potential difference probes distinguished by great variety and produced mostly in the laboratory for specific experimental applications. As a rule, they consist of commercially available instrumentation, and have a number of disadvantages: large dimensions, complexity and high cost, small sensitivity, operating speed, noiseproof, etc. The purpose of this paper is to describe the basic approaches to design of the small dimension, complete contact potential difference probes, providing high sensitivity, operating speed, and noise immunity. In this paper the contact potential difference probe, which is a electrometer with dynamic capacitor plate at about 0.1–5 mm2 . These probes are could be used in scanning systems, such as a Scanning Kelvin Probe, as well as for controlling system of manufacturing processes, e.g. under friction. The design of such contact potential difference probes conducted using modern electronic components, unique circuitry and design solutions described in detail at paper. The electromechanical modulator applied for mechanical vibrations of the reference sample. To provide a high amplitude and phase stability the upgraded generator with Wien bridge was used instead traditional oscillation sensor. The preamplifier made on the base of modern operational amplifiers with femtoampere current input. The power of the preamplifier designed with «floating ground». It allows keeping the relation constant potential to the probe components when changing over a wide range the compensation voltage. The phase detector-integrator based on the electronic antiphase switches with the modulation frequency of the contact potential difference and the integrator. Fullwave phase detection would greatly increase the sensitivity of the probe. In addition, the application of the phase detection allows suppressing noise and crosstalk at frequencies different from the modulation frequency. The preamplifier and the reference sample

  17. Minimally invasive surgical technique for tethered surgical drains

    Directory of Open Access Journals (Sweden)

    Shane R Hess

    2017-01-01

    Full Text Available A feared complication of temporary surgical drain placement is from the technical error of accidentally suturing the surgical drain into the wound. Postoperative discovery of a tethered drain can frequently necessitate return to the operating room if it cannot be successfully removed with nonoperative techniques. Formal wound exploration increases anesthesia and infection risk as well as cost and is best avoided if possible. We present a minimally invasive surgical technique that can avoid the morbidity associated with a full surgical wound exploration to remove a tethered drain when other nonoperative techniques fail.

  18. CHAMP (Camera, Handlens, and Microscope Probe)

    Science.gov (United States)

    Mungas, Greg S.; Boynton, John E.; Balzer, Mark A.; Beegle, Luther; Sobel, Harold R.; Fisher, Ted; Klein, Dan; Deans, Matthew; Lee, Pascal; Sepulveda, Cesar A.

    2005-01-01

    CHAMP (Camera, Handlens And Microscope Probe)is a novel field microscope capable of color imaging with continuously variable spatial resolution from infinity imaging down to diffraction-limited microscopy (3 micron/pixel). As a robotic arm-mounted imager, CHAMP supports stereo imaging with variable baselines, can continuously image targets at an increasing magnification during an arm approach, can provide precision rangefinding estimates to targets, and can accommodate microscopic imaging of rough surfaces through a image filtering process called z-stacking. CHAMP was originally developed through the Mars Instrument Development Program (MIDP) in support of robotic field investigations, but may also find application in new areas such as robotic in-orbit servicing and maintenance operations associated with spacecraft and human operations. We overview CHAMP'S instrument performance and basic design considerations below.

  19. CHAMP (Camera, Handlens, and Microscope Probe)

    Science.gov (United States)

    Mungas, Greg S.; Boynton, John E.; Balzer, Mark A.; Beegle, Luther; Sobel, Harold R.; Fisher, Ted; Klein, Dan; Deans, Matthew; Lee, Pascal; Sepulveda, Cesar A.

    2005-01-01

    CHAMP (Camera, Handlens And Microscope Probe)is a novel field microscope capable of color imaging with continuously variable spatial resolution from infinity imaging down to diffraction-limited microscopy (3 micron/pixel). As a robotic arm-mounted imager, CHAMP supports stereo imaging with variable baselines, can continuously image targets at an increasing magnification during an arm approach, can provide precision rangefinding estimates to targets, and can accommodate microscopic imaging of rough surfaces through a image filtering process called z-stacking. CHAMP was originally developed through the Mars Instrument Development Program (MIDP) in support of robotic field investigations, but may also find application in new areas such as robotic in-orbit servicing and maintenance operations associated with spacecraft and human operations. We overview CHAMP'S instrument performance and basic design considerations below.

  20. A hyperspectral fluorescence lifetime probe for skin cancer diagnosis

    Science.gov (United States)

    De Beule, P. A. A.; Dunsby, C.; Galletly, N. P.; Stamp, G. W.; Chu, A. C.; Anand, U.; Anand, P.; Benham, C. D.; Naylor, A.; French, P. M. W.

    2007-12-01

    The autofluorescence of biological tissue can be exploited for the detection and diagnosis of disease but, to date, its complex nature and relatively weak signal levels have impeded its widespread application in biology and medicine. We present here a portable instrument designed for the in situ simultaneous measurement of autofluorescence emission spectra and temporal decay profiles, permitting the analysis of complex fluorescence signals. This hyperspectral fluorescence lifetime probe utilizes two ultrafast lasers operating at 355 and 440nm that can excite autofluorescence from many different biomolecules present in skin tissue including keratin, collagen, nicotinamide adenine dinucleotide (phosphate), and flavins. The instrument incorporates an optical fiber probe to provide sample illumination and fluorescence collection over a millimeter-sized area. We present a description of the system, including spectral and temporal characterizations, and report the preliminary application of this instrument to a study of recently resected (skin lesions, illustrating its potential for skin cancer detection and diagnosis.

  1. The methodological quality of systematic reviews comparing temporomandibular joint disorder surgical and non-surgical treatment

    Directory of Open Access Journals (Sweden)

    Vasconcelos Belmiro CE

    2008-09-01

    Full Text Available Abstract Background Temporomandibular joint disorders (TMJD are multifactor, complex clinical problems affecting approximately 60–70% of the general population, with considerable controversy about the most effective treatment. For example, reports claim success rates of 70% and 83% for non-surgical and surgical treatment, whereas other reports claim success rates of 40% to 70% for self-improvement without treatment. Therefore, the purpose of this study was to (1 identify systematic reviews comparing temporomandibular joint disorder surgical and non-surgical treatment, (2 evaluate their methodological quality, and (3 evaluate the evidence grade within the systematic reviews. Methods A search strategy was developed and implemented for MEDLINE, Cochrane Library, LILACS, and Brazilian Dentistry Bibliography databases. Inclusion criteria were: systematic reviews (± meta-analysis comparing surgical and non-surgical TMJD treatment, published in English, Spanish, Portuguese, Italian, or German between the years 1966 and 2007(up to July. Exclusion criteria were: in vitro or animal studies; narrative reviews or editorials or editorial letters; and articles published in other languages. Two investigators independently selected and evaluated systematic reviews. Three different instruments (AMSTAR, OQAQ and CASP were used to evaluate methodological quality, and the results averaged. The GRADE instrument was used to evaluate the evidence grade within the reviews. Results The search strategy identified 211 reports; of which 2 were systematic reviews meeting inclusion criteria. The first review met 23.5 ± 6.0% and the second met 77.5 ± 12.8% of the methodological quality criteria (mean ± sd. In these systematic reviews between 9 and 15% of the trials were graded as high quality, and 2 and 8% of the total number of patients were involved in these studies. Conclusion The results indicate that in spite of the widespread impact of TMJD, and the multitude of

  2. Probe into extraneous surgical instruments to be brought into standardized management flowsheet in sterile supply center%外来手术器械纳入消毒供应中心标准化管理流程的探讨

    Institute of Scientific and Technical Information of China (English)

    孔磊; 黄志灵

    2010-01-01

    介绍了外来手术器械的清洗消毒、检查包装、灭菌、发放、回收清洗等规范化、标准化管理.将外来手术器械纳入消毒供应中心标准化管理流程,统筹管理外来手术器械,提高了外来手术器械的清洗和灭菌质量,确保病人手术安全,控制医源性感染.促进资源共享,降低医院成本;也利于促进区域化消毒供应中心的建立和消毒供应专业的发展.

  3. Hard Probes at ATLAS

    CERN Document Server

    Citron, Z; The ATLAS collaboration

    2014-01-01

    The ATLAS collaboration has measured several hard probe observables in Pb+Pb and p+Pb collisions at the LHC. These measurements include jets which show modification in the hot dense medium of heavy ion collisions as well as color neutral electro-weak bosons. Together, they elucidate the nature of heavy ion collisions.

  4. One-Probe Search

    DEFF Research Database (Denmark)

    Östlin, Anna; Pagh, Rasmus

    2002-01-01

    We consider dictionaries that perform lookups by probing a single word of memory, knowing only the size of the data structure. We describe a randomized dictionary where a lookup returns the correct answer with probability 1 - e, and otherwise returns don't know. The lookup procedure uses an expan...

  5. Probing the Solar System

    Science.gov (United States)

    Wilkinson, John

    2013-01-01

    Humans have always had the vision to one day live on other planets. This vision existed even before the first person was put into orbit. Since the early space missions of putting humans into orbit around Earth, many advances have been made in space technology. We have now sent many space probes deep into the Solar system to explore the planets and…

  6. One-Probe Search

    DEFF Research Database (Denmark)

    Östlin, Anna; Pagh, Rasmus

    2002-01-01

    We consider dictionaries that perform lookups by probing a single word of memory, knowing only the size of the data structure. We describe a randomized dictionary where a lookup returns the correct answer with probability 1 - e, and otherwise returns don't know. The lookup procedure uses an expan...

  7. Probing the Solar System

    Science.gov (United States)

    Wilkinson, John

    2013-01-01

    Humans have always had the vision to one day live on other planets. This vision existed even before the first person was put into orbit. Since the early space missions of putting humans into orbit around Earth, many advances have been made in space technology. We have now sent many space probes deep into the Solar system to explore the planets and…

  8. Surgical scar revision: An overview

    Directory of Open Access Journals (Sweden)

    Shilpa Garg

    2014-01-01

    Full Text Available Scar formation is an inevitable consequence of wound healing from either a traumatic or a surgical intervention. The aesthetic appearance of a scar is the most important criteria to judge the surgical outcome. An understanding of the anatomy and wound healing along with experience, meticulous planning and technique can reduce complications and improve the surgical outcome. Scar revision does not erase a scar but helps to make it less noticeable and more acceptable. Both surgical and non-surgical techniques, used either alone or in combination can be used for revising a scar. In planning a scar revision surgeon should decide on when to act and the type of technique to use for scar revision to get an aesthetically pleasing outcome. This review article provides overview of methods applied for facial scar revision. This predominantly covers surgical methods.

  9. The keyboard instruments.

    Science.gov (United States)

    Manchester, Ralph A

    2014-06-01

    Now that the field of performing arts medicine has been in existence for over three decades, we are approaching a key point: we should start to see more articles that bring together the data that have been collected from several studies in order to draw more robust conclusions. Review articles and their more structured relative, the meta-analysis, can help to improve our understanding of a particular topic, comparing and synthesizing the results of previous research that has been done on that subject area. One way this could be done would be to review the research that has been carried out on the performance-related problems associated with playing a particular instrument or group of instruments. While I am not going to do that myself, I hope that others will. In this editorial, I will do a very selective review of the playing-related musculoskeletal disorders (PRMDs) associated with one instrument group (the keyboard instruments), focusing on the most played instrument in that group (the piano;).

  10. Biochemistry Instrumentation Core Technology Center

    Data.gov (United States)

    Federal Laboratory Consortium — The UCLA-DOE Biochemistry Instrumentation Core Facility provides the UCLA biochemistry community with easy access to sophisticated instrumentation for a wide variety...

  11. Heat Flux Instrumentation Laboratory (HFIL)

    Data.gov (United States)

    Federal Laboratory Consortium — Description: The Heat Flux Instrumentation Laboratory is used to develop advanced, flexible, thin film gauge instrumentation for the Air Force Research Laboratory....

  12. Thermal Analysis of Small Re-Entry Probe

    Science.gov (United States)

    Agrawal, Parul; Prabhu, Dinesh K.; Chen, Y. K.

    2012-01-01

    The Small Probe Reentry Investigation for TPS Engineering (SPRITE) concept was developed at NASA Ames Research Center to facilitate arc-jet testing of a fully instrumented prototype probe at flight scale. Besides demonstrating the feasibility of testing a flight-scale model and the capability of an on-board data acquisition system, another objective for this project was to investigate the capability of simulation tools to predict thermal environments of the probe/test article and its interior. This paper focuses on finite-element thermal analyses of the SPRITE probe during the arcjet tests. Several iterations were performed during the early design phase to provide critical design parameters and guidelines for testing. The thermal effects of ablation and pyrolysis were incorporated into the final higher-fidelity modeling approach by coupling the finite-element analyses with a two-dimensional thermal protection materials response code. Model predictions show good agreement with thermocouple data obtained during the arcjet test.

  13. Developing fibre optic Raman probes for applications in clinical spectroscopy.

    Science.gov (United States)

    Stevens, Oliver; Iping Petterson, Ingeborg E; Day, John C C; Stone, Nick

    2016-04-07

    Raman spectroscopy has been shown by various groups over the last two decades to have significant capability in discriminating disease states in bodily fluids, cells and tissues. Recent development in instrumentation, optics and manufacturing approaches has facilitated the design and demonstration of various novel in vivo probes, which have applicability for myriad of applications. This review focusses on key considerations and recommendations for application specific clinical Raman probe design and construction. Raman probes can be utilised as clinical tools able to provide rapid, non-invasive, real-time molecular analysis of disease specific changes in tissues. Clearly the target tissue location, the significance of spectral changes with disease and the possible access routes to the region of interest will vary for each clinical application considered. This review provides insight into design and construction considerations, including suitable probe designs and manufacturing materials compatible with Raman spectroscopy.

  14. Tophi - surgical treatment.

    Science.gov (United States)

    Słowińska, Iwona; Słowiński, Radosław; Rutkowska-Sak, Lidia

    2016-01-01

    Gout is an inflammatory joint disease associated with deposition of monosodium urate crystals in the bones forming the joints, in periarticular tissues and in other organs. The disease is one of the most frequent causes of disability. This paper presents the case of a 57-year-old male patient treated for generalised gout. A "clinical mask" suggesting another disease was the cause of making the correct diagnosis only six years after the occurrence of the first manifestations. The patient, with high values of inflammatory markers, severe pain and advanced joint destruction, was given an aggressive anti-inflammatory treatment. The unsatisfactory effect of the conservative treatment forced the authors to perform surgical resection of the gouty nodules in the hands. After several operations the function of the hand joints operated on, appearance of the hands and the quality of the patient's life improved significantly.

  15. Tophi – surgical treatment

    Science.gov (United States)

    Słowińska, Iwona; Słowiński, Radosław

    2016-01-01

    Gout is an inflammatory joint disease associated with deposition of monosodium urate crystals in the bones forming the joints, in periarticular tissues and in other organs. The disease is one of the most frequent causes of disability. This paper presents the case of a 57-year-old male patient treated for generalised gout. A “clinical mask” suggesting another disease was the cause of making the correct diagnosis only six years after the occurrence of the first manifestations. The patient, with high values of inflammatory markers, severe pain and advanced joint destruction, was given an aggressive anti-inflammatory treatment. The unsatisfactory effect of the conservative treatment forced the authors to perform surgical resection of the gouty nodules in the hands. After several operations the function of the hand joints operated on, appearance of the hands and the quality of the patient’s life improved significantly. PMID:27994273

  16. Neuronavigation. Principles. Surgical technique.

    Science.gov (United States)

    Ivanov, Marcel; Ciurea, Alexandru Vlad

    2009-01-01

    Neuronavigation and stereotaxy are techniques designed to help neurosurgeons precisely localize different intracerebral pathological processes by using a set of preoperative images (CT, MRI, fMRI, PET, SPECT etc.). The development of computer assisted surgery was possible only after a significant technological progress, especially in the area of informatics and imagistics. The main indications of neuronavigation are represented by the targeting of small and deep intracerebral lesions and choosing the best way to treat them, in order to preserve the neurological function. Stereotaxis also allows lesioning or stimulation of basal ganglia for the treatment of movement disorders. These techniques can bring an important amount of confort both to the patient and to the neurosurgeon. Neuronavigation was introduced in Romania around 2003, in four neurosurgical centers. We present our five-years experience in neuronavigation and describe the main principles and surgical techniques.

  17. Surgical education in Mexico.

    Science.gov (United States)

    Cervantes, Jorge

    2010-05-01

    Surgical education in Mexico basically follows the same model as in the United States, with a selection process resembling the matching program. There is a 4-year training period during which residents in their third year spend 4 months as the sole surgeon in a rural community. During the senior year they are entitled to an elective period in a place of their choosing. After completion of the 4 years, residents have to present a thesis and undergo an oral examination before getting a university diploma. They are then encouraged to pass the written and oral examination of the Mexican Board of Surgery before they are fully certified to enter practice in a public or private hospital.

  18. Aethalometer™ Instrument Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Sedlacek, Arthur J [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2016-04-01

    The Aethalometer is an instrument that provides a real-time readout of the concentration of “Black” or “Elemental” carbon aerosol particles (BC or E) in an air stream (see Figure 1 and Figure 2). It is a self-contained instrument that measures the rate of change of optical transmission through a spot on a filter where aerosol is being continuously collected and uses the information to calculate the concentration of optically absorbing material in the sampled air stream. The instrument measures the transmitted light intensities through the “sensing” portion of the filter, on which the aerosol spot is being collected, and a “reference” portion of the filter as a check on the stability of the optical source. A mass flowmeter monitors the sample air flow rate. The data from these three measurements is used to determine the mean BC content of the air stream.

  19. 3D Spectroscopic Instrumentation

    CERN Document Server

    Bershady, Matthew A

    2009-01-01

    In this Chapter we review the challenges of, and opportunities for, 3D spectroscopy, and how these have lead to new and different approaches to sampling astronomical information. We describe and categorize existing instruments on 4m and 10m telescopes. Our primary focus is on grating-dispersed spectrographs. We discuss how to optimize dispersive elements, such as VPH gratings, to achieve adequate spectral resolution, high throughput, and efficient data packing to maximize spatial sampling for 3D spectroscopy. We review and compare the various coupling methods that make these spectrographs ``3D,'' including fibers, lenslets, slicers, and filtered multi-slits. We also describe Fabry-Perot and spatial-heterodyne interferometers, pointing out their advantages as field-widened systems relative to conventional, grating-dispersed spectrographs. We explore the parameter space all these instruments sample, highlighting regimes open for exploitation. Present instruments provide a foil for future development. We give an...

  20. Micro mushroom instrumentation system

    Science.gov (United States)

    Davidson, W. F.

    1986-01-01

    An electronics circuit which provides for the recording of instrumentation data on an optical disk is disclosed. The optical disk is formatted in a spiral format instead of concentric tracks. The spiral format allows data to be recorded without the gaps that would be associated with concentric tracks. The instrumentation system provides each channel with a program instrumentation amplifier, a six pole lowpass switched capacitor filter, a sample and hold amplifier, and a digital to analog converter to provide automatic offset capability. Since each channel has its own components, simultaneous samples of every channel can be captured. All of the input signal's channel variables can be captured. All of the input signal's channel variables can be changed under software control without hardware changes. A single board computer is used for a system controller.

  1. ISSUERS OF FINANCIAL INSTRUMENTS

    Directory of Open Access Journals (Sweden)

    Cristian GHEORGHE

    2016-05-01

    Full Text Available The rules laid down by Romanian Capital Market Law and the regulations put in force for its implementation apply to issuers of financial instruments admitted to trading on the regulated market established in Romania. But the issuers remain companies incorporated under Company Law of 1990. Such dual regulations need increased attention in order to observe the legal status of the issuers/companies and financial instruments/shares. Romanian legislator has chosen to implement in Capital Market Law special rules regarding the administration of the issuers of financial instruments, not only rules regarding admitting and maintaining to a regulated market. Thus issuers are, in Romanian Law perspective, special company that should comply special rule regarding board of administration and general shareholders meeting.

  2. Calibration of Geodetic Instruments

    Directory of Open Access Journals (Sweden)

    Marek Bajtala

    2005-06-01

    Full Text Available The problem of metrology and security systems of unification, correctness and standard reproducibilities belong to the preferred requirements of theory and technical practice in geodesy. Requirements on the control and verification of measured instruments and equipments increase and the importance and up-to-date of calibration get into the foreground. Calibration possibilities of length-scales (of electronic rangefinders and angle-scales (of horizontal circles of geodetic instruments. Calibration of electronic rangefinders on the linear comparative baseline in terrain. Primary standard of planar angle – optical traverse and its exploitation for calibration of the horizontal circles of theodolites. The calibration equipment of the Institute of Slovak Metrology in Bratislava. The Calibration process and results from the calibration of horizontal circles of selected geodetic instruments.

  3. Virtual Sensor Test Instrumentation

    Science.gov (United States)

    Wang, Roy

    2011-01-01

    Virtual Sensor Test Instrumentation is based on the concept of smart sensor technology for testing with intelligence needed to perform sell-diagnosis of health, and to participate in a hierarchy of health determination at sensor, process, and system levels. A virtual sensor test instrumentation consists of five elements: (1) a common sensor interface, (2) microprocessor, (3) wireless interface, (4) signal conditioning and ADC/DAC (analog-to-digital conversion/ digital-to-analog conversion), and (5) onboard EEPROM (electrically erasable programmable read-only memory) for metadata storage and executable software to create powerful, scalable, reconfigurable, and reliable embedded and distributed test instruments. In order to maximize the efficient data conversion through the smart sensor node, plug-and-play functionality is required to interface with traditional sensors to enhance their identity and capabilities for data processing and communications. Virtual sensor test instrumentation can be accessible wirelessly via a Network Capable Application Processor (NCAP) or a Smart Transducer Interlace Module (STIM) that may be managed under real-time rule engines for mission-critical applications. The transducer senses the physical quantity being measured and converts it into an electrical signal. The signal is fed to an A/D converter, and is ready for use by the processor to execute functional transformation based on the sensor characteristics stored in a Transducer Electronic Data Sheet (TEDS). Virtual sensor test instrumentation is built upon an open-system architecture with standardized protocol modules/stacks to interface with industry standards and commonly used software. One major benefit for deploying the virtual sensor test instrumentation is the ability, through a plug-and-play common interface, to convert raw sensor data in either analog or digital form, to an IEEE 1451 standard-based smart sensor, which has instructions to program sensors for a wide variety of

  4. EDITORIAL: Probing the nanoworld Probing the nanoworld

    Science.gov (United States)

    Miles, Mervyn

    2009-10-01

    In nanotechnology, it is the unique properties arising from nanometre-scale structures that lead not only to their technological importance but also to a better understanding of the underlying science. Over the last twenty years, material properties at the nanoscale have been dominated by the properties of carbon in the form of the C60 molecule, single- and multi-wall carbon nanotubes, nanodiamonds, and recently graphene. During this period, research published in the journal Nanotechnology has revealed the amazing mechanical properties of such materials as well as their remarkable electronic properties with the promise of new devices. Furthermore, nanoparticles, nanotubes, nanorods, and nanowires from metals and dielectrics have been characterized for their electronic, mechanical, optical, chemical and catalytic properties. Scanning probe microscopy (SPM) has become the main characterization technique and atomic force microscopy (AFM) the most frequently used SPM. Over the past twenty years, SPM techniques that were previously experimental in nature have become routine. At the same time, investigations using AFM continue to yield impressive results that demonstrate the great potential of this powerful imaging tool, particularly in close to physiological conditions. In this special issue a collaboration of researchers in Europe report the use of AFM to provide high-resolution topographical images of individual carbon nanotubes immobilized on various biological membranes, including a nuclear membrane for the first time (Lamprecht C et al 2009 Nanotechnology 20 434001). Other SPM developments such as high-speed AFM appear to be making a transition from specialist laboratories to the mainstream, and perhaps the same may be said for non-contact AFM. Looking to the future, characterisation techniques involving SPM and spectroscopy, such as tip-enhanced Raman spectroscopy, could emerge as everyday methods. In all these advanced techniques, routinely available probes will

  5. Standard NIM instrumentation system

    CERN Document Server

    1990-01-01

    NIM is a standard modular instrumentation system that is in wide use throughout the world. As the NIM system developed and accommodations were made to a dynamic instrumentation field and a rapidly advancing technology, additions, revisions and clarifications were made. These were incorporated into the standard in the form of addenda and errata. This standard is a revision of the NIM document, AEC Report TID- 20893 (Rev 4) dated July 1974. It includes all the addenda and errata items that were previously issued as well as numerous additional items to make the standard current with modern technology and manufacturing practice.

  6. Animation of MARDI Instrument

    Science.gov (United States)

    2008-01-01

    [figure removed for brevity, see original site] Click on image to view the animation This animation shows a zoom into the Mars Descent Imager (MARDI) instrument onboard NASA's Phoenix Mars Lander. The Phoenix team will soon attempt to use a microphone on the MARDI instrument to capture sounds of Mars. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  7. Virtual Reality Musical Instruments

    DEFF Research Database (Denmark)

    Serafin, Stefania; Erkut, Cumhur; Kojs, Juraj

    2016-01-01

    The rapid development and availability of low-cost technologies have created a wide interest in virtual reality. In the field of computer music, the term “virtual musical instruments” has been used for a long time to describe software simulations, extensions of existing musical instruments......, and ways to control them with new interfaces for musical expression. Virtual reality musical instruments (VRMIs) that include a simulated visual component delivered via a head-mounted display or other forms of immersive visualization have not yet received much attention. In this article, we present a field...

  8. Spectroelectrochemical Instrument Measures TOC

    Science.gov (United States)

    Kounaves, Sam

    2011-01-01

    A spectroelectrochemical instrument has been developed for measuring the total organic carbon (TOC) content of an aqueous solution. Measurements of TOC are frequently performed in environmental, clinical, and industrial settings. Until now, techniques for performing such measurements have included, various ly, the use of hazardous reagents, ultraviolet light, or ovens, to promote reactions in which the carbon contents are oxidized. The instrument now being developed is intended to be a safer, more economical means of oxidizing organic carbon and determining the TOC levels of aqueous solutions and for providing a low power/mass unit for use in planetary missions.

  9. [Hardening of dental instruments].

    Science.gov (United States)

    Gerasev, G P

    1981-01-01

    The possibility of prolonging the service life of stomatological instruments by the local hardening of their working parts is discussed. Such hardening should be achieved by using hard and wear-resistant materials. The examples of hardening dental elevators and hard-alloy dental drills are given. New trends in the local hardening of instruments are the treatment of their working parts with laser beams, the application of coating on their surface by the gas-detonation method. The results of research work and trials are presented.

  10. Celadon Figurines Play Instruments

    Institute of Scientific and Technical Information of China (English)

    1995-01-01

    This group of figurines, each 0.15m tall, were unearthed from a Tang Dynasty tomb in Changsha in 1977. Music was very developed in the Tang Dynasty. Colorful musical instruments and dances were popular both among the people and in the palace. These vivid-looking figurines wear pleated skirts with small sleeves and open chest, a style influenced by the non-Han nationalities living in the north and west of China. Some of the musical instruments were brought from the Western Regions. The figurines are playing the xiao (a vertical bamboo flute), the konghou (an

  11. Virtual Reality Musical Instruments

    DEFF Research Database (Denmark)

    Serafin, Stefania; Erkut, Cumhur; Kojs, Juraj

    2016-01-01

    The rapid development and availability of low-cost technologies have created a wide interest in virtual reality. In the field of computer music, the term “virtual musical instruments” has been used for a long time to describe software simulations, extensions of existing musical instruments......, and ways to control them with new interfaces for musical expression. Virtual reality musical instruments (VRMIs) that include a simulated visual component delivered via a head-mounted display or other forms of immersive visualization have not yet received much attention. In this article, we present a field...

  12. MEFISTO An electric field instrument for BepiColombo/MMO

    Science.gov (United States)

    Blomberg, L. G.; Matsumoto, H.; Bougeret, J.-L.; Kojima, H.; Yagitani, S.; Cumnock, J. A.; Eriksson, A. I.; Marklund, G. T.; Wahlund, J.-E.; Bylander, L.; Åhlén, L.; Holtet, J. A.; Ishisaka, K.; Kallio, E.; Kasaba, Y.; Matsuoka, A.; Moncuquet, M.; Mursula, K.; Omura, Y.; Trotignon, J. G.

    2006-01-01

    MEFISTO, together with the companion instrument WPT, are planning the first-ever in situ measurements of the electric field in the magnetosphere of planet Mercury. The instruments have been selected by JAXA for inclusion in the BepiColombo/MMO payload, as part of the Plasma Wave Investigation coordinated by Kyoto University. The magnetosphere of Mercury was discovered by Mariner 10 in 1974 and will be studied further by Messenger starting in 2011. However, neither spacecraft did or will measure the electric field. Electric fields are crucial in the dynamics of a magnetosphere and for the energy and plasma transport between different regions within the magnetosphere as well as between the magnetosphere and the surrounding regions. The MEFISTO instrument will be capable of measuring electric fields from DC to 3 MHz, and will thus also allow diagnostics of waves at all frequencies of relevance to the Hermean magnetosphere. MEFISTO is a double-probe electric field instrument. The double-probe technique has strong heritage and is well proven on missions such as Viking, Polar, and Cluster. For BepiColombo, a newly developed deployment mechanism is planned which reduces the mass by a factor of about 5 compared to conventional mechanisms for 15 m long booms. We describe the basic characteristics of the instrument and briefly discuss the new developments made to tailor the instrument to flight in Mercury orbit.

  13. MEFISTO - an electric field instrument for BepiColombo/MMO

    Science.gov (United States)

    Blomberg, L. G.; Mefisto Team

    MEFISTO, together with the companion instrument PANT, are planning the first-ever in-situ measurements of the electric field in the magnetosphere of planet Mercury. The instruments are proposed to JAXA for inclusion in the BepiColombo/MMO payload, as part of the Plasma Wave Investigation co-ordinated by Kyoto University. The magnetosphere of Mercury was discovered by Mariner 10 in 1974, and will be studied further by Messenger starting in 2009. However, neither spacecraft measures the electric field. Electric fields are crucial in the dynamics of a magnetosphere and for the energy and plasma transport between different regions within the magnetosphere as well as between the magnetosphere and the surrounding regions. The instrument will be capable of measuring electric fields from DC to 3 MHz, and will thus also allow diagnostics of waves at all frequencies of relevance to the Hermean magnetosphere. MEFISTO is a double-probe electric field instrument. The double-probe technique has strong heritage and is well proven on missions such as Viking, Freja, and Cluster. For BepiColombo, a newly developed deployment mechanism is planned which reduces the mass by a factor of about 5 compared to conventional mechanisms. We describe the basic characteristics of the instrument and briefly discuss the new developments made to tailor the instrument to flight in Mercury orbit.

  14. Combined Impedance Probe and Langmuir Probe Studies of the Low-Latitude E Region

    Science.gov (United States)

    Rowland, D. E.; Pfaff, R. F.; Steigies, C. T.

    2008-01-01

    The EQUIS-2 sounding rocket and radar campaign, launched from Kwajalein Atoll in 2004, included a mission to study low-latitude irregularities and electrodynamics, led by NASA GSFC. This mission included two instrumented rockets launched into the nighttime E region (apogee near 120 km), which included comprehensive electrodynamics and neutral density instrumentation. These rockets carried the first of a new generation of impedance probes, that utilize a wide-band drive signal to simultaneously measure the impedance of an antenna in a plasma as a function of frequency from 7 kEIz to 4 MHz. at a rapid cadence. This technique promises to permit true plasma spectroscopy, and resulted in the identification of multiple plasma resonances and accurate measurements of the plasma density, even in the low density nighttime E region. We present analyses of the technique and resulting spectra, and show how these data may be combined with fixed-bias Langmuir Probe data to infer the temperature structure of the E region as well as providing accurate absolute calibrations for the very high time resolution fixed-bias probe data. The data is shown to agree well with data from ionosonde, the ALTAIR radar, and the Peruvian beacon experiment.

  15. Minimally invasive surgical treatment of valvular heart disease.

    Science.gov (United States)

    Goldstone, Andrew B; Joseph Woo, Y

    2014-01-01

    Cardiac surgery is in the midst of a practice revolution. Traditionally, surgery for valvular heart disease consisted of valve replacement via conventional sternotomy using cardiopulmonary bypass. However, over the past 20 years, the increasing popularity of less-invasive procedures, accompanied by advancements in imaging, surgical instrumentation, and robotic technology, has motivated and enabled surgeons to develop and perform complex cardiac surgical procedures through small incisions, often eliminating the need for sternotomy or cardiopulmonary bypass. In addition to the benefits of improved cosmesis, minimally invasive mitral valve surgery was pioneered with the intent of reducing morbidity, postoperative pain, blood loss, hospital length of stay, and time to return to normal activity. This article reviews the current state-of-the-art of minimally invasive approaches to the surgical treatment of valvular heart disease.

  16. Strategic planning ensures surgical success in cases of proliferative vitreoretinopathy.

    Science.gov (United States)

    Lakhanpal, R Ross; Hariprasad, Seenu M

    2015-02-01

    For this Practical Retina column, Dr. Ross Lakhanpal from Baltimore was asked to comment on the current state of thinking and management options for proliferative vitreoretinopathy (PVR) after retinal detachment (RD) surgery.We are all aware that PVR continues to be an important cause of recurrent RD after successful repair. This feared complication has been reported to occur in up to 8% of patients after undergoing RD repair. Despite the historic progress made in managing various vitreoretinal diseases over the past decade, most retina specialists will agree that an unmet need remains in this landscape. Fortunately, advances in various surgical technologies such as instrumentation, lighting, and visualization have improved the outcomes after PVR management.Dr. Lakhanpal discusses causes of PVR, management goals, surgical techniques, and pearls to avoid complications after managing PVR. His experience working in an urban tertiary surgical retina practice enables him to offer insights that will be highly valued by our community.

  17. Calibration Fixture For Anemometer Probes

    Science.gov (United States)

    Lewis, Charles R.; Nagel, Robert T.

    1993-01-01

    Fixture facilitates calibration of three-dimensional sideflow thermal anemometer probes. With fixture, probe oriented at number of angles throughout its design range. Readings calibrated as function of orientation in airflow. Calibration repeatable and verifiable.

  18. Huygens probe entry dynamic model and accelerometer data analysis

    Science.gov (United States)

    Colombatti, Giacomo; Aboudan, Alessio; Ferri, Francesca; Angrilli, Francesco

    2008-04-01

    During the first phase of Huygens arrival into Titan's atmosphere the probe is subjected to gravitational and aerodynamic forces in aerodynamic hypersonic regime. Atmospheric drag exerts a strong deceleration on the capsule measured by Huygens atmospheric structure instrument (HASI) servo accelerometer. A 6 DOF (Degree of Freedom) model of the Huygens probe entry dynamics has been developed and used for data analysis. The accelerometer data are analysed and the model allows the retrieval of dynamics information of Huygens probe from 1545 km altitude down to end of the entry phase. Probe's initial conditions (velocity and position) were refined to match the measured deceleration profile resulting in a different altitude at interface epoch with respect to those of the Cassini Navigation Team. Velocity and position of probe at interface epoch are compatible with those used by Descent Trajectory Working Group (DTWG). Measurements acquired before atmosphere detection are used to estimate probe's angular rate, bound attitude and characterise the angle of attack profile which results to be lower than 4∘ during the whole entry. Probe's spin calculated (6.98 RPM) is slightly different with respect to DTWG of 7.28 RPM but considering a 2% error in the Inertia matrix these results are inside the 1-σ error band.

  19. Quantitative mechanical assessment of the whole prostate gland ex vivo using dynamic instrumented palpation.

    Science.gov (United States)

    Hammer, Steven J; Good, Daniel W; Scanlan, Paul; Palacio-Torralba, Javier; Phipps, Simon; Stewart, Grant D; Shu, Will; Chen, Yuhang; McNeill, S Alan; Reuben, Robert L

    2017-09-01

    An instrumented palpation sensor, designed for measuring the dynamic modulus of tissue in vivo, has been developed and trialled on ex vivo whole prostate glands. The sensor consists of a flexible membrane sensor/actuator with an embedded strain gauge and is actuated using a dynamically varying airflow at frequencies of 1 and 5 Hz. The device was calibrated using an indentation stiffness measurement rig and gelatine samples with a range of static modulus similar to that reported in the literature for prostate tissue. The glands were removed from patients with diagnosed prostate cancer scheduled for radical prostatectomy, and the stiffness was measured within 30 min of surgical removal. Each prostate was later examined histologically in a column immediately below each indentation point and graded into one of the four groups; normal, benign prostatic hyperplasia, cancerous and mixed cancer and benign prostatic hyperplasia. In total, 11 prostates were assessed using multiple point probing, and the complex modulus at 1 and 5 Hz was calculated on a point-by-point basis. The device yielded values of quasi-static modulus of 15 ± 0.5 kPa and dynamic modulus of 20 ± 0.5 kPa for whole prostates, and a sensitivity of up to 80% with slightly lower specificity was achieved on diagnosis of prostate cancer using a combination of mechanical measures. This assessment did not take into account some obvious factors such as edge effects, overlap and clinical significance of the cancer, all of which would improve performance. The device, as currently configured, is immediately deployable in vivo. A number of improvements are also identified which could improve the sensitivity and specificity in future embodiments of the probe.

  20. Economic Policy Instruments

    DEFF Research Database (Denmark)

    Klemmensen, Børge

    2007-01-01

    Økonomiske instrumenter begrundes med behovet for politiske indgreb, der muliggør internaliseringen af omkostningerne ved de miljøpåvirkninger, produktion and levevis afstedkommer, således at hensyntagen til miljøet bliver en del af virksomheders og husholdningers omkostninger og dermed en tilsky...

  1. The ozone monitoring instrument

    NARCIS (Netherlands)

    Levelt, P.F.; Oord, G.H.J. van den; Dobber, M.R.; Mälkki, A.; Visser, H.; Vries, J. de; Stammes, P.; Lundell, J.O.V.; Saari, H.

    2006-01-01

    The Ozone Monitoring Instrument (OMI) flies on the National Aeronautics and Space Adminsitration's Earth Observing System Aura satellite launched in July 2004. OMI is a ultraviolet/visible (UV/VIS) nadir solar backscatter spectrometer, which provides nearly global coverage in one day with a spatial

  2. Creating a Super Instrument

    DEFF Research Database (Denmark)

    Kallionpää, Maria; Gasselseder, Hans-Peter

    2015-01-01

    Thanks to the development of new technology, musical instruments are no more tied to their existing acoustic or technical limitations as almost all parameters can be augmented or modified in real time. An increasing number of composers, performers, and computer programmers have thus become intere...

  3. Neutron instrumentation for biology

    Energy Technology Data Exchange (ETDEWEB)

    Mason, S.A. [Institut Laue-Langevin, Grenoble (France)

    1994-12-31

    In the October 1994 round of proposals at the ILL, the external biology review sub- committee was asked to allocate neutron beam time to a wide range of experiments, on almost half the total number of scheduled neutron instruments: on 3 diffractometers, on 3 small angle scattering instruments, and on some 6 inelastic scattering spectrometers. In the 3.5 years since the temporary reactor shutdown, the ILL`s management structure has been optimized, budgets and staff have been trimmed, the ILL reactor has been re-built, and many of the instruments up-graded, many powerful (mainly Unix) workstations have been introduced, and the neighboring European Synchrotron Radiation Facility has established itself as the leading synchrotron radiation source and has started its official user program. The ILL reactor remains the world`s most intense dedicated neutron source. In this challenging context, it is of interest to review briefly the park of ILL instruments used to study the structure and energetics of small and large biological systems. A brief summary will be made of each class of experiments actually proposed in the latest ILL proposal round.

  4. Advanced instrumentation and teleoperation

    Energy Technology Data Exchange (ETDEWEB)

    Decreton, M

    1998-07-01

    SCK-CEN's advanced instrumentation and teleoperation project aims at evaluating the potential of a telerobotic approach in a nuclear environment and, in particular, the use of remote-perception systems. Main achievements in 1997 in the areas of R and D on radiation tolerance for remote sensing, optical fibres and optical-fibre sensors, and computer-aided teleoperation are reported.

  5. Economic Policy Instruments

    DEFF Research Database (Denmark)

    Klemmensen, Børge

    2007-01-01

    Økonomiske instrumenter begrundes med behovet for politiske indgreb, der muliggør internaliseringen af omkostningerne ved de miljøpåvirkninger, produktion and levevis afstedkommer, således at hensyntagen til miljøet bliver en del af virksomheders og husholdningers omkostninger og dermed en...

  6. Instrument for assaying radiation

    Energy Technology Data Exchange (ETDEWEB)

    Coleman, Jody Rustyn; Farfan, Eduardo B.

    2016-03-22

    An instrument for assaying radiation includes a flat panel detector having a first side opposed to a second side. A collimated aperture covers at least a portion of the first side of the flat panel detector. At least one of a display screen or a radiation shield may cover at least a portion of the second side of the flat panel detector.

  7. Integrating Nephelometer Instrument Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Uin, J. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2016-03-01

    The Integrating Nephelometer (Figure 1) is an instrument that measures aerosol light scattering. It measures aerosol optical scattering properties by detecting (with a wide angular integration – from 7 to 170°) the light scattered by the aerosol and subtracting the light scattered by the carrier gas, the instrument walls and the background noise in the detector (zeroing). Zeroing is typically performed for 5 minutes every day at midnight UTC. The scattered light is split into red (700 nm), green (550 nm), and blue (450 nm) wavelengths and captured by three photomultiplier tubes. The instrument can measure total scatter as well as backscatter only (from 90 to 170°) (Heintzenberg and Charlson 1996; Anderson et al. 1996; Anderson and Ogren 1998; TSI 3563 2015) At ARM (Atmospheric Radiation Measurement), two identical Nephelometers are usually run in series with a sample relative humidity (RH) conditioner between them. This is possible because Nephelometer sampling is non-destructive and the sample can be passed on to another instrument. The sample RH conditioner scans through multiple RH values in cycles, treating the sample. This kind of setup allows to study how aerosol particles’ light scattering properties are affected by humidification (Anderson et al. 1996). For historical reasons, the two Nephelometers in this setup are labeled “wet” and “dry”, with the “dry” Nephelometer usually being the one before the conditioner and sampling ambient air (the names are switched for the MAOS measurement site due to the high RH of the ambient air).

  8. Instruments of Transformative Governance

    DEFF Research Database (Denmark)

    Borrás, Susana

    production and distribution channels. PDPs aim at overcoming current market and government failures by pooling resources in the attempt to solve this global social challenge. Thus, PDPs are a case of instruments of transformative research and innovation, operating in a transnational governance context...

  9. The tropospheric monitoring instrument

    NARCIS (Netherlands)

    Voert, M.J. te; Brakel, R. van; Witvoet, G.

    2014-01-01

    Thermal and opto-mechanical design and analysis work has been done on the Tropospheric Monitoring Instrument (TROPOMI), a spectrometer on the Copernicus Sentinel 5 Precursor satellite. To verify compliance with the stringent opto-mechanical stability requirements, detailed thermal and thermo-mechani

  10. Virtual reality musical instruments

    DEFF Research Database (Denmark)

    Serafin, Stefania; Erkut, Cumhur; Kojs, Juraj

    2016-01-01

    The rapid development and availability of low cost technologies has created a wide interest in virtual reality (VR), but how to design and evaluate multisensory interactions in VR remains as a challenge. In this paper, we focus on virtual reality musical instruments, present an overview of our...

  11. The ozone monitoring instrument

    NARCIS (Netherlands)

    Levelt, P.F.; Oord, G.H.J. van den; Dobber, M.R.; Mälkki, A.; Visser, H.; Vries, J. de; Stammes, P.; Lundell, J.O.V.; Saari, H.

    2006-01-01

    The Ozone Monitoring Instrument (OMI) flies on the National Aeronautics and Space Adminsitration's Earth Observing System Aura satellite launched in July 2004. OMI is a ultraviolet/visible (UV/VIS) nadir solar backscatter spectrometer, which provides nearly global coverage in one day with a spatial

  12. Payment Instrument Characteristics

    DEFF Research Database (Denmark)

    Holst, Jacques; Kjeldsen, Martin; Hedman, Jonas

    2015-01-01

    payment innovations. Using the Repertory Grid technique to explore 15 payers’ perception of six payment instruments, including coins, banknotes, debit cards, credit cards, mobile payments, and on-line banking, we identify 16 payment characteristics. The characteristics aggregate seventy-six unique...

  13. Specification for Instrumentation

    DEFF Research Database (Denmark)

    Margheritini, Lucia; Kofoed, Jens Peter

    This paper is intended to give an overview on instrumentation for monitoring the efficiency of the Converter and the performance of the device. Real-time control of plant and data monitoring and storage are the main objectives of the control system....

  14. Acquiring minimally invasive surgical skills

    NARCIS (Netherlands)

    Hiemstra, Ellen

    2012-01-01

    Many topics in surgical skills education have been implemented without a solid scientific basis. For that reason we have tried to find this scientific basis. We have focused on training and evaluation of minimally invasive surgical skills in a training setting and in practice in the operating room.

  15. Surgical innovations in canine gonadectomy

    NARCIS (Netherlands)

    Van Goethem, Bart

    2016-01-01

    In this thesis some recent technological developments in human surgery are evaluated for their potential use in veterinary medicine by introducing them as surgical innovations for canine gonadectomy. Barbed sutures achieve wound apposition without surgical knot tying and thus avoid knot-associated n

  16. Surgical treatment of acquired tracheocele.

    Science.gov (United States)

    Porubsky, Edward A; Gourin, Christine G

    2006-06-01

    Acquired tracheoceles are rare clinical entities that can cause a variety of chronic and recurrent aerodigestive tract symptoms. The management of acquired tracheoceles is primarily conservative, but surgical intervention may be indicated for patients with refractory symptoms. We present a case of acquired tracheocele and describe a method of successful surgical management.

  17. Surgical innovations in canine gonadectomy

    NARCIS (Netherlands)

    Van Goethem, Bart

    2016-01-01

    In this thesis some recent technological developments in human surgery are evaluated for their potential use in veterinary medicine by introducing them as surgical innovations for canine gonadectomy. Barbed sutures achieve wound apposition without surgical knot tying and thus avoid knot-associated n

  18. Probing properties of cold radiofrequency plasma with polymer probe

    Science.gov (United States)

    Bormashenko, E.; Chaniel, G.; Multanen, V.

    2015-01-01

    The probe intended for the characterization of cold plasma is introduced. The probe allows the estimation of Debye length of cold plasma. The probe is based on the pronounced modification of surface properties (wettability) of polymer films by cold plasmas. The probe was tested with the cold radiofrequency inductive air plasma discharge. The Debye length and the concentration of charge carriers were estimated for various gas pressures. The reported results coincide reasonably with the corresponding values established by other methods. The probe makes possible measurement of characteristics of cold plasmas in closed chambers.

  19. Probing Properties of Cold Radiofrequency Plasma with Polymer Probe

    CERN Document Server

    Bormashenko, Edward; Multanen, Victor

    2014-01-01

    The probe intended for the characterization of cold plasma is introduced. The probe allows estimation of the Debye length of the cold plasma. The probe is based on the pronounced modification of surface properties (wettability) of polymer films by cold plasmas. The probe was tested with the cold radiofrequency inductive air plasma discharge. The Debye length and the concentration of charge carriers were estimated for various gas pressures. The reported results coincide reasonably with the corresponding values established by other methods. The probe makes possible measurement of characteristics of cold plasmas in closed chambers.

  20. Phoenix Conductivity Probe

    Science.gov (United States)

    2008-01-01

    This image taken by the Surface Stereo Imager on Sol 49, or the 49th Martian day of the mission (July 14, 2008), shows thermal and electrical conductivity probe on NASA's Phoenix Mars Lander's Robotic Arm. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is led by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  1. The Science of String Instruments

    CERN Document Server

    Rossing, Thomas D

    2010-01-01

    Many performing musicians, as well as instrument builders, are coming to realize the importance of understanding the science of musical instruments. This book explains how string instruments produce sound. It presents basic ideas in simple language, and it also translates some more sophisticated ideas in non-technical language. It should be of interest to performers, researchers, and instrument makers alike.

  2. Nanoscale thermal probing

    Directory of Open Access Journals (Sweden)

    Yanan Yue

    2012-03-01

    Full Text Available Nanoscale novel devices have raised the demand for nanoscale thermal characterization that is critical for evaluating the device performance and durability. Achieving nanoscale spatial resolution and high accuracy in temperature measurement is very challenging due to the limitation of measurement pathways. In this review, we discuss four methodologies currently developed in nanoscale surface imaging and temperature measurement. To overcome the restriction of the conventional methods, the scanning thermal microscopy technique is widely used. From the perspective of measuring target, the optical feature size method can be applied by using either Raman or fluorescence thermometry. The near-field optical method that measures nanoscale temperature by focusing the optical field to a nano-sized region provides a non-contact and non-destructive way for nanoscale thermal probing. Although the resistance thermometry based on nano-sized thermal sensors is possible for nanoscale thermal probing, significant effort is still needed to reduce the size of the current sensors by using advanced fabrication techniques. At the same time, the development of nanoscale imaging techniques, such as fluorescence imaging, provides a great potential solution to resolve the nanoscale thermal probing problem.

  3. Thermal Measurements of Resonant Ultrasonic Surgical Horn

    Science.gov (United States)

    Manandhar, Prakash; Gupta, Saurav V.; Kosenko, Igor V.; Cotter, Daniel J.

    Temperatures at the distal end of the tip in ultrasonic surgical instruments are of interest because this is the applied part to a patient. It is difficult to directly measure these temperatures using contacting temperature sensors due to high vibration levels. Non-contact infrared (IR) thermography could be an important tool to experimentally determine the tip temperature. However, the low emissivity and polished cylindrical geometry of the tips complicate accurate IR thermography. In this study, we use Cr2O3 high emissivity paint to coat the tip for increased accuracy in IR measurements. Temperature measurements are consistent with heat generation models based on mechanical quality factor of about 5000 for the titanium tip material. It was found that no heat is generated at the tip distal end where strain is low. Air cooling by aspiration is effective at keeping tip distal end temperatures at near ambient levels even with heat transfer by conduction from warmer parts of the tip.

  4. Irrigants in non-surgical endodontic treatment.

    Science.gov (United States)

    Regan, John D; Fleury, Alex A P

    2006-01-01

    This paper highlights that one of the main goals of root canal treatment is the elimination of microorganisms from the contaminated root canal system. Instrumentation alone will not allow for adequate debridement and disinfection of the complex and diverse root canal system. Chemomechanical debridement is required. The importance of the use of irrigants during non-surgical root canal treatment has frequently been neglected both during instruction of dental students and later in the clinical practice of endodontics. The article highlights 'shape, clean and fill' vs. 'clean, shape and fill' to enable chemomechanical debridement. Our protocol advises mechanical debridement and copious irrigation for a minimum of twenty minutes with 2.5% to 6% solutions of sodium hypochlorite, followed by a rinse with a 17% solution of ethylenediaminetetraacetic acid and a final rinse with 2% chlorhexidine. The canals are dried with high volume aspirators and sterile paper points.

  5. Multiplex fluorescence melting curve analysis for mutation detection with dual-labeled, self-quenched probes.

    Directory of Open Access Journals (Sweden)

    Qiuying Huang

    Full Text Available Probe-based fluorescence melting curve analysis (FMCA is a powerful tool for mutation detection based on melting temperature generated by thermal denaturation of the probe-target hybrid. Nevertheless, the color multiplexing, probe design, and cross-platform compatibility remain to be limited by using existing probe chemistries. We hereby explored two dual-labeled, self-quenched probes, TaqMan and shared-stem molecular beacons, in their ability to conduct FMCA. Both probes could be directly used for FMCA and readily integrated with closed-tube amplicon hybridization under asymmetric PCR conditions. Improved flexibility of FMCA by using these probes was illustrated in three representative applications of FMCA: mutation scanning, mutation identification and mutation genotyping, all of which achieved improved color-multiplexing with easy probe design and versatile probe combination and all were validated with a large number of real clinical samples. The universal cross-platform compatibility of these probes-based FMCA was also demonstrated by a 4-color mutation genotyping assay performed on five different real-time PCR instruments. The dual-labeled, self-quenched probes offered unprecedented combined advantage of enhanced multiplexing, improved flexibility in probe design, and expanded cross-platform compatibility, which would substantially improve FMCA in mutation detection of various applications.

  6. Cost-effectiveness of decompression according to Gill versus instrumented spondylodesis in the treatment of sciatica due to low grade spondylolytic spondylolisthesis: A prospective randomised controlled trial [NTR1300

    NARCIS (Netherlands)

    M.P. Arts (Mark); M.J.T. Verstegen (Marco); R. Brand (René); B.W. Koes (Bart); M.E. van den Akker (Elske); W.C. Peul (Wilco)

    2008-01-01

    textabstractBackground. Nerve root decompression with instrumented spondylodesis is the most frequently performed surgical procedure in the treatment of patients with symptomatic low-grade spondylolytic spondylolisthesis. Nerve root decompression without instrumented fusion, i.e. Gill's procedure, i

  7. Cost-effectiveness of decompression according to Gill versus instrumented spondylodesis in the treatment of sciatica due to low grade spondylolytic spondylolisthesis: A prospective randomised controlled trial [NTR1300

    NARCIS (Netherlands)

    M.P. Arts (Mark); M.J.T. Verstegen (Marco); R. Brand (René); B.W. Koes (Bart); M.E. van den Akker (Elske); W.C. Peul (Wilco)

    2008-01-01

    textabstractBackground. Nerve root decompression with instrumented spondylodesis is the most frequently performed surgical procedure in the treatment of patients with symptomatic low-grade spondylolytic spondylolisthesis. Nerve root decompression without instrumented fusion, i.e. Gill's procedure, i

  8. Probe technologies for clean sampling and measurement of subglacial lakes.

    Science.gov (United States)

    Mowlem, Matt; Saw, Kevin; Brown, Robin; Waugh, Edward; Cardwell, Christopher L; Wyatt, James; Magiopoulos, Iordanis; Keen, Peter; Campbell, Jon; Rundle, Nicholas; Gkritzalis-Papadopoulos, Athanasios

    2016-01-28

    It is 4 years since the subglacial lake community published its plans for accessing, sampling, measuring and studying the pristine, and hitherto enigmatic and very different, Antarctic subglacial lakes, Vostok, Whillans and Ellsworth. This paper summarizes the contrasting probe technologies designed for each of these subglacial environments and briefly updates how these designs changed or were used differently when compared to previously published plans. A detailed update on the final engineering design and technical aspects of the probe for Subglacial Lake Ellsworth is presented. This probe is designed for clean access, is negatively buoyant (350 kg), 5.2 m long, 200 mm in diameter, approximately cylindrical and consists of five major units: (i) an upper power and communications unit attached to an optical and electrical conducting tether, (ii)-(iv) three water and particle samplers, and (v) a sensors, imaging and instrumentation pack tipped with a miniature sediment corer. To date, only in Subglacial Lake Whillans have instruments been successfully deployed. Probe technologies for Subglacial Lake Vostok (2014/15) and Lake Ellsworth (2012/13) were not deployed for technical reasons, in the case of Lake Ellsworth because hot-water drilling was unable to access the lake during the field season window. Lessons learned and opportunities for probe technologies in future subglacial access missions are discussed.

  9. Post-Surgical Clinical Monitoring of Soft Tissue Wound Healing in Periodontal and Implant Surgery.

    Science.gov (United States)

    Pippi, Roberto

    2017-01-01

    Clinical features of surgical soft tissue wound healing in dentistry have been rarely discussed in the international literature. The aim of the present paper is to highlight both the main clinical findings of surgical wound healing, especially in periodontal and implant dentistry, and the wound healing monitoring procedures which should be followed. Wound inspection after careful food and plaque debridement is the essential part of wound healing monitoring. Periodontal and peri-implant probing should be performed only after tissue healing has been completed and not on a weekly basis in peri-implant tissue monitoring. Telephone follow-up and patient self-assessment scales can also be used the days following surgery to monitor the most common surgical complications such as pain, swelling, bleeding, and bruising. Wound healing monitoring is an important concern in all surgical procedures since it allows to identify signs or/and symptoms possibly related to surgical complications.

  10. Nine New Fluorescent Probes

    Science.gov (United States)

    Lin, Tsung-I.; Jovanovic, Misa V.; Dowben, Robert M.

    1989-06-01

    Absorption and fluorescence spectroscopic studies are reported here for nine new fluorescent probes recently synthesized in our laboratories: four pyrene derivatives with substituents of (i) 1,3-diacetoxy-6,8-dichlorosulfonyl, (ii) 1,3-dihydroxy-6,8-disodiumsulfonate, (iii) 1,3-disodiumsulfonate, and (iv) l-ethoxy-3,6,8-trisodiumsulfonate groups, and five [7-julolidino] coumarin derivatives with substituents of (v) 3-carboxylate-4-methyl, (vi) 3- methylcarboxylate, (vii) 3-acetate-4-methyl, (viii) 3-propionate-4-methyl, and (ix) 3-sulfonate-4-methyl groups. Pyrene compounds i and ii and coumarin compounds v and vi exhibit interesting absorbance and fluorescence properties: their absorption maxima are red shifted compared to the parent compound to the blue-green region, and the band width broadens considerably. All four blue-absorbing dyes fluoresce intensely in the green region, and the two pyrene compounds emit at such long wavelengths without formation of excimers. The fluorescence properties of these compounds are quite environment-sensitive: considerable spectral shifts and fluorescence intensity changes have been observed in the pH range from 3 to 10 and in a wide variety of polar and hydrophobic solvents with vastly different dielectric constants. The high extinction and fluorescence quantum yield of these probes make them ideal fluorescent labeling reagents for proteins, antibodies, nucleic acids, and cellular organelles. The pH and hydrophobicity-dependent fluorescence changes can be utilized as optical pH and/or hydrophobicity indicators for mapping environmental difference in various cellular components in a single cell. Since all nine probes absorb in the UV, but emit at different wavelengths in the visible, these two groups of compounds offer an advantage of utilizing a single monochromatic light source (e.g., a nitrogen laser) to achieve multi-wavelength detection for flow cytometry application. As a first step to explore potential application in

  11. Surgical infection in art.

    Science.gov (United States)

    Meakins, J L

    1996-12-01

    The earliest images of medicine and surgery in Western art are from the late Middle Ages. Although often attractive, at that time they were illustrative and mirrored the text on how to diagnose or treat a specific condition. These drawings in medieval manuscripts represent management of abscesses, perianal infection and fistulas, amputation, and wound dressings. With the Renaissance, art in all its forms flourished, and surgeons were represented at work draining carbuncles, infected bursae, and mastoiditis; managing ulcers, scrofula, and skin infections; and performing amputations. Specific diagnosis can be made, such as streptococcal infection in the discarded leg of the miraculous transplantation performed by Saints Cosmas and Damian and in the works of Rembrandt van Rijn and Frederic Bazille. Evocations of cytokine activity are evident in works by Albrecht Dürer, Edvard Munch, and James Tissot. The iconography of society's view of a surgeon is apparent and often not complimentary. The surgeon's art is a visual art. Astute observation leads to early diagnosis and better results in surgical infection and the septic state. Learning to see what we look at enhances our appreciation of the world around us but, quite specifically, makes us better clinicians.

  12. UC Merced NMR Instrumentation Acquisition

    Science.gov (United States)

    2015-06-18

    UC Merced NMR Instrumentation Acquisition For the UC Merced NMR Instrumentation Acquisition proposal, a new 400 MHz and an upgraded 500 MHz NMR ...UC Merced NMR Instrumentation Acquisition Report Title For the UC Merced NMR Instrumentation Acquisition proposal, a new 400 MHz and an upgraded 500...MHz NMR have been delivered, installed, and incorporated into research and two lab courses. While no results from these instruments have been

  13. Surgical glove perforation among nurses in ophthalmic surgery: a case-control study.

    Science.gov (United States)

    Shek, Karen Mei-Yan; Chau, Janita Pak-Chun

    2014-04-01

    Many of the ophthalmic surgical instruments are extremely fine and sharp. Due to the dim light environment required for ophthalmic surgical procedures, the passing of sharp instruments among surgeons and scrub nurses also poses a risk for glove perforations. A case-control study was performed to determine the number and site of perforations in the surgical gloves used by a group of scrub nurses during ophthalmic surgery. All six nurses working in an eye and refractive surgery centre in Hong Kong participated in the study. A total of 100 (50 pairs) used surgical gloves were collected following 50 ophthalmic surgeries. Fifty pairs of new surgical gloves were also collected. Every collected surgical glove underwent the water leak test. The surgical procedure perforation rate was 8%, and none of the perforations were detected by the scrub nurses. No perforations were found in any unused gloves. The findings indicate that glove perforations for scrub nurses during ophthalmic surgery do occur and mostly go unnoticed. Future studies should continue to explore factors contributing to surgical glove perforation.

  14. Probing ultrafast dynamics of condensed matter with pump and probe experiments with X-rays

    Energy Technology Data Exchange (ETDEWEB)

    Giles, Carlos; Celestre, Rafael; Tasca, Kelin R.; Vescovi, Rafael; Faria, Guilherme; Dias, Carlos S.; Tomm, Natasha; Cordeiro, Cristiano M.B. [Universidade Estadual de Campinas (IFGW/UNICAMP), SP (Brazil). Inst. de Fisica Gleb Wataghin; Silva, Rene Nome [Universidade Estadual de Campinas (IQ/UNICAMP), SP (Brazil). Inst. de Quimica

    2012-07-01

    Full text: In this presentation we will describe recent advances in the route to start ultrafast studies with X-rays in Brazil. From one side pump and probe experiments using synchrotron radiation facilities will be described, showing how the thermal expansion of an invar alloy is not occurring at the picosecond time scales after heating the sample with a femtosecond infrared laser pulse. We will also describe the experimental setup at the LNLS in Campinas were we probe the fast response of a piezoelectric material to a 1 ns electric pulse recorded by a pump and probe X-ray diffraction experiment at the XRD2 LNLS beamline. We will also present the first results of the production of sub-picosecond X-ray pulses using an amplified infrared laser at the Ultrafast Laboratory of DEQ/IFGW. The instrumentation developed at UNICAMP together with the first setup for a pump and probe experiment will be presented. Characteristic radiation of various targets (TiK{alpha}, FeK{alpha}, CuK{alpha}) have been measured at a repetition rate of 1 kHz showing unambiguously our capability of producing a pulsed X-ray source for time resolved x-ray diffraction experiments. Experiments to measure the pulse width of the X-ray radiation are under development and the latest results will be presented. All these efforts open the path to the nucleation of a research group in ultrafast studies using X-rays in Brazil. (author)

  15. netherland hydrological modeling instrument

    Science.gov (United States)

    Hoogewoud, J. C.; de Lange, W. J.; Veldhuizen, A.; Prinsen, G.

    2012-04-01

    Netherlands Hydrological Modeling Instrument A decision support system for water basin management. J.C. Hoogewoud , W.J. de Lange ,A. Veldhuizen , G. Prinsen , The Netherlands Hydrological modeling Instrument (NHI) is the center point of a framework of models, to coherently model the hydrological system and the multitude of functions it supports. Dutch hydrological institutes Deltares, Alterra, Netherlands Environmental Assessment Agency, RWS Waterdienst, STOWA and Vewin are cooperating in enhancing the NHI for adequate decision support. The instrument is used by three different ministries involved in national water policy matters, for instance the WFD, drought management, manure policy and climate change issues. The basis of the modeling instrument is a state-of-the-art on-line coupling of the groundwater system (MODFLOW), the unsaturated zone (metaSWAP) and the surface water system (MOZART-DM). It brings together hydro(geo)logical processes from the column to the basin scale, ranging from 250x250m plots to the river Rhine and includes salt water flow. The NHI is validated with an eight year run (1998-2006) with dry and wet periods. For this run different parts of the hydrology have been compared with measurements. For instance, water demands in dry periods (e.g. for irrigation), discharges at outlets, groundwater levels and evaporation. A validation alone is not enough to get support from stakeholders. Involvement from stakeholders in the modeling process is needed. There fore to gain sufficient support and trust in the instrument on different (policy) levels a couple of actions have been taken: 1. a transparent evaluation of modeling-results has been set up 2. an extensive program is running to cooperate with regional waterboards and suppliers of drinking water in improving the NHI 3. sharing (hydrological) data via newly setup Modeling Database for local and national models 4. Enhancing the NHI with "local" information. The NHI is and has been used for many

  16. Developments in analytical instrumentation

    Science.gov (United States)

    Petrie, G.

    The situation regarding photogrammetric instrumentation has changed quite dramatically over the last 2 or 3 years with the withdrawal of most analogue stereo-plotting machines from the market place and their replacement by analytically based instrumentation. While there have been few new developments in the field of comparators, there has been an explosive development in the area of small, relatively inexpensive analytical stereo-plotters based on the use of microcomputers. In particular, a number of new instruments have been introduced by manufacturers who mostly have not been associated previously with photogrammetry. Several innovative concepts have been introduced in these small but capable instruments, many of which are aimed at specialised applications, e.g. in close-range photogrammetry (using small-format cameras); for thematic mapping (by organisations engaged in environmental monitoring or resources exploitation); for map revision, etc. Another innovative and possibly significant development has been the production of conversion kits to convert suitable analogue stereo-plotting machines such as the Topocart, PG-2 and B-8 into fully fledged analytical plotters. The larger and more sophisticated analytical stereo-plotters are mostly being produced by the traditional mainstream photogrammetric systems suppliers with several new instruments and developments being introduced at the top end of the market. These include the use of enlarged photo stages to handle images up to 25 × 50 cm format; the complete integration of graphics workstations into the analytical plotter design; the introduction of graphics superimposition and stereo-superimposition; the addition of correlators for the automatic measurement of height, etc. The software associated with this new analytical instrumentation is now undergoing extensive re-development with the need to supply photogrammetric data as input to the more sophisticated G.I.S. systems now being installed by clients, instead

  17. Endoluminal surgical triangulation 2.0: A new flexible surgical robot. Preliminary pre-clinical results with colonic submucosal dissection.

    Science.gov (United States)

    Légner, András; Diana, Michele; Halvax, Péter; Liu, Yu-Yin; Zorn, Lucile; Zanne, Philippe; Nageotte, Florent; De Mathelin, Michel; Dallemagne, Bernard; Marescaux, Jacques

    2017-05-03

    Complex intraluminal surgical interventions of the gastrointestinal tract are challenging due to the limitation of existing instruments. Our group has developed a master-slave robotic flexible endoscopic platform that provides instrument triangulation in an endoluminal environment. Colonic endoscopic submucosal dissections (ESD) were carried out in eight pigs. The robot was introduced transanally. A combination of adapted tele-operated instruments was used. Specimens were inspected and measured. Out of 18 ESDs in total, 12 were successfully completed. Among the completed procedures, two perforations and one system failure occurred and were managed intraoperatively. There was no major bleeding. Mean size of the removed specimens was 18.2 ± 9.8 cm(2) and mean total procedure time was 73 ± 35.5 min. Experimental colorectal ESDs using the flexible surgical robot were feasible and reflected a short learning curve. After some technical improvements the system might allow for a wider adoption of complex endoluminal surgical procedures. Copyright © 2017 John Wiley & Sons, Ltd.

  18. How to improve instrument disinfection by ultrasound.

    Science.gov (United States)

    Jatzwauk, L; Schöne, H; Pietsch, H

    2001-08-01

    Ultrasound technologies have a wide range of hospital and dental applications which include cleaning and disinfection of surgical and dental instruments. We measured the germicidal efficacy of sonication, with or without chemical disinfectants, in an ultrasonic bath delivering a frequency of 35 kHz and an intensity of 0.66 W/cm2. Cultures of Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans were exposed to ultrasound and to an amine-based disinfectant in non-bactericidal concentrations. Ultrasonication for 60 min alone did not cause a significant killing of the bacteria and yeast. However, we were able to show that sonication can act as a powerful synergistic agent to increase the cidal efficacy of the disinfectant against S. aureus and P. aeruginosa. C. albicans was more resistant to the combination of ultrasound and chemical disinfection. The key role in the action of ultrasound in cleaning of instruments and perhaps in enhanced disinfection is played by cavitation phenomena. The distribution of cavitations in an ultrasonic bath is not homogenous. We found a similar synergistic effect of ultrasound and disinfectant in positions with low cavitation. The synergistic effect was not reduced inside rubber tubes. Before ultrasound can be accepted as an integral part of the cleaning and disinfection process of medical instruments, the influence of intensity and frequency of sonication and the effects of cavitation must be clarified.

  19. Development of Mackintosh Probe Extractor

    Science.gov (United States)

    Rahman, Noor Khazanah A.; Kaamin, Masiri; Suwandi, Amir Khan; Sahat, Suhaila; Jahaya Kesot, Mohd

    2016-11-01

    Dynamic probing is a continuous soil investigation technique, which is one of the simplest soil penetration test. It basically consist of repeatedly driving a metal tipped probe into the ground using a drop weight of fixed mass and travel. Testing was carried out continuously from ground level to the final penetration depth. Once the soil investigation work done, it is difficult to pull out the probe rod from the ground, due to strong soil structure grip against probe cone and prevent the probe rod out from the ground. Thus, in this case, a tool named Extracting Probe was created to assist in the process of retracting the probe rod from the ground. In addition, Extracting Probe also can reduce the time to extract the probe rod from the ground compare with the conventional method. At the same time, it also can reduce manpower cost because only one worker involve to handle this tool compare with conventional method used two or more workers. From experiment that have been done we found that the time difference between conventional tools and extracting probe is significant, average time difference is 155 minutes. In addition the extracting probe can reduce manpower usage, and also labour cost for operating the tool. With all these advantages makes this tool has the potential to be marketed.

  20. Instrumentation problems for physicians.

    Science.gov (United States)

    Turner, G O

    1980-01-01

    The physician has, for whatever reasons, diminished his or her level of involvement on the team dedicated to developing, refining, and evaluating medical technology. As a result, the challenge confronting the physician and the technology development team today is to orchestrate a team structure that will ensure the greatest input and commitment from physicians and other professionals during current and future technology development. The charges of cost escalation and dehumanization in our system of health care delivery will also be discussed, as will the lack of, or confusion about, access to data concerning cost of a given instrument, and fuzzy semantics and perspectives on technology and instrumentation. The author suggests answers to, or means to ameliorate, the problems.