Angebote zu "Techniques" (20 Treffer)

Kategorien

Shops

Peritrochanteric Fractures: A Surgeon's Perspec...
49,00 € *
ggf. zzgl. Versand

Peritrochanteric Fractures: A Surgeon's Perspective ab 49 € als Taschenbuch: A Comparative Analysis of the Operative Techniques in Peritrochanteric Fractures of Femur. Aus dem Bereich: Bücher, Wissenschaft, Medizin,

Anbieter: hugendubel
Stand: 01.06.2020
Zum Angebot
Peritrochanteric Fractures: A Surgeon's Perspec...
49,00 € *
ggf. zzgl. Versand

Peritrochanteric Fractures: A Surgeon's Perspective ab 49 EURO A Comparative Analysis of the Operative Techniques in Peritrochanteric Fractures of Femur

Anbieter: ebook.de
Stand: 01.06.2020
Zum Angebot
Analysis of a Kayabasi Ekici Type Hip Prosthesis
68,00 € *
ggf. zzgl. Versand

The finite element method, one of the most advanced simulation techniques in solid mechanics, is used for orthopedic biomechanics. It is used as a tool for the design and analysis of total joint replacement and other orthopedic devices. The design of hip joint prostheses is a complex process that requires close co-operation between engineers and surgeons. One of the most important factors in the implant design is to reduce stress on the femur and the bone-cement. The purpose of this study is to investigate the behavior of newly designed implants under body weight load during stumbling by parametric modeling. In the parametric design, the prosthesis functional requirement is that the locking of stem to the femur head using cement should be strong enough to preclude unlocking during the life time of a patient and to prevent sliding of the implant into the bone-cement. These parameters are then optimized. Using the results of this investigation, the probability of failure was investigated for both the initial and shape-optimized prosthesis designs using several simple performance functions describing fatigue theory.

Anbieter: Dodax
Stand: 01.06.2020
Zum Angebot
Reconstruction of The Proximal Femur in Hip Art...
79,00 € *
ggf. zzgl. Versand

In this book, we evaluated the clinical and the radiological outcomes of different reconstructive techniques used in the treatment of different types of bone defects in the proximal femur due to different causes in forty-one (41) patients that had hip arthroplasty, fifteen (15) prospective and twenty-six (26) retrospective. The prospective patients were five (5) done in Zagazig university hospitals, Egypt and ten (10) in Toronto East General hospital, Canada. The twenty-six (26) retrospective patients were twelve (12) done in Toronto East General hospital and fourteen (14) done in Oshwa hospital, Canada. The maximum follow up of the patients was five years from (1997 to 2002), the minimum follow up was one year from (2001 to 2002), {average three years}. Cemented stems were used in 10 patients who represent (25%) of all the patients. Cementless stems were used in 27 patients who represent (67.8%) of all the patients. One patient died 24 hours postoperative due to preoperative cardiac problems. The Harris hip score improved from a mean of 4.9 (0 to 14) before the surgery, to a mean of 60.5 (0 to 85) at the latest review after the surgery.

Anbieter: Dodax
Stand: 01.06.2020
Zum Angebot
Ultrasound Based Navigation and Control for Ort...
44,90 € *
ggf. zzgl. Versand

Robotic Surgery increases precision and accuracy of surgical procedures, besides producing more reliable and reproducible results, minimizing the invasiveness, reducing complications and improving patient safety, compared with conventional techniques. The target's localization within the operating room is fundamental to the success of robotic systems. In this context a new navigation system, used in the control loop, to co-manipulate a robotic system developed to assist orthopaedic surgeons, is proposed. The system was designed to perform a hole in the femur head, necessary to implant the initial guide wire used in Hip Resurfacing surgery. During the surgery, the bone position and orientation is obtained through a registration process between a set of US images acquired in real time and the CT femur model, preloaded pre-operatively. Contrary to current surgical systems, it does not use any type of implant in the bone, to localize the femur, but passive markers, of an optical measurement system, placed on the probe and the robot to measure their 3D poses. Experimental validation tests were performed on a human's femur phantom, validating the proposed system.

Anbieter: Dodax
Stand: 01.06.2020
Zum Angebot
Study of Correlation Between Stature and Finger...
49,00 € *
ggf. zzgl. Versand

Anthropometry provides scientific methods and techniques for taking various measurements and observation on the living being and the skeleton.Stature is one of the numerous data for identification.The stature prediction occupies relatively a central position in the identification necessitated by the medicolegal experts or medical jurisprudence and also in the anthropological research.This study was taken up with the aim of finding out whether there is any correlation between stature & finger length,and also to find out which finger is best to estimate the stature of an individual, in males and females individually. Till date, most of the workers on stature estimation have used the length of long bones such as femur, tibia, humerus, radius, etc. A meagre data is available on previous works done for calculation of height from finger length. Hence an attempt is made to fill this lacuna. In the present study it was found that there is a significant correlation between stature and finger length. Ring finger is best to estimate stature in both males and females.

Anbieter: Dodax
Stand: 01.06.2020
Zum Angebot
Signal Analysis of Quantitative Ultrasound Meas...
48,80 € *
ggf. zzgl. Versand

For the prediction of osteoporotic fracture risk quantitative Ultrasound (QUS) is an alternative to techniques like X-ray absorptiometry or magnetic resonance tomography. In QUS measurements short pulses with center frequencies of 0.5 – 1 MHz are transmitted through bone. From the received signals characteristic transfer parameters associated with mechanical bone properties are determined. Within two research projects a device has been developed to transfer this technique from peripheral sites like the heel to the proximal femur, which is a main fracture site. In doing so, the conventional signal processing techniques for the calculation of the standard QUS parameters frequently failed due to multipath transmission of sound waves in bone. Therefore, the aim of this work is the development of a signal analysis which allows for characterizing sound paths separately.Based on theoretical considerations regarding sound propagation in bone and the introduction of the standard QUS parameters, the impact of multipath transmission to the calculation of these parameters is discussed. Analytically and with simulations errors are illustrated which arise from disregarding the existence of multiple sound paths. Furthermore, the ex vivo and in vivo measurement setups are shortly presented.Main focus of this work is put on the signal analysis. For the separation of superimposed signal components from different sound paths a model-based signal analysis is adapted from the area of nondestructive material testing to this specific task, at first. This algorithm is based on the analytical description of the received US pulses in the time domain as a superposition of several Gaussianmodulated cosines with additive white noise. Applying nonlinear optimization procedures using leastsquares fits which are integrated in an iterative Space Alternating Generalized Expectationmaximization algorithm (SAGE) the difference between measured and modelled signal is minimized and, thus, the model parameters of each signal component are determined. Then, the transfer parameters are calculated from the shift of these parameters compared to a reference signal. However, this algorithm is limited to signals, which can be described as Gaussian modulated cosines in the time domain.

Anbieter: Dodax
Stand: 01.06.2020
Zum Angebot
Nonunions
130,11 € *
ggf. zzgl. Versand

Providing a comprehensive presentation of the diagnosis, evaluation and management of nonunions, this generously illustrated text details the current principles, surgical techniques and approaches with these challenging clinical situations. Since each nonunion can be fairly particular, the treatment regimens provide guidelines to effectively approach such problems. Opening with a discussion of the principles of nonunions and fracture healing, the remainder of the book is divided by anatomical area and provides evidence-based recommendations, case examples, and preferred treatment/algorithms for both the upper and lower extremities, including the clavicle, the proximal humerus, proximal femur, and tibial plateau, as well as the pelvis and acetabulum. Specialized circumstances are also discussed, including periprosthetics and joint replacement.Although not every single treatment option is described for every single anatomical area and type of injury, Nonunions is an excellent resource for orthopedic trauma surgeons, residents and students, not only for managing these common yet complex problems but also in preventing nonunions from occurring by avoiding surgical causes and mitigating patient risk factors.

Anbieter: Dodax
Stand: 01.06.2020
Zum Angebot
Minimally Invasive Fracture Repair, An Issue of...
123,00 CHF *
ggf. zzgl. Versand

Includes topics such as: concepts of the biomechanics in fracture repair, MIPO techniques for articular fractures, bone plate and plate-rod for MIPO, MIPO techniques of the tibia, MIPO techniques of femur, percutaneous pinning, MIPO techniques of the radius and ulna, percutaneous arthrodesis, and MIPO techniques of the metacarpus and metatarsus.

Anbieter: Orell Fuessli CH
Stand: 01.06.2020
Zum Angebot