View clinical trials related to Amputation.
Filter by:The primary objective of this study is to assess the effectiveness of the pro-active dynamic socket (PADS) on increasing socket comfort and fit for transfemoral and transtibial amputees during ambulation and rest, addressing residual limb volume fluctuations with a controlled flow bladder system.
Background: - Many people who lose a limb feel pain in the missing limb. This feeling is called phantom limb pain. Researchers do not fully understand what causes this pain. Differences in people's genes may play a role. Comparing the genes of people with and without phantom limb pain may help researchers better understand this feeling, who is likely to develop it, and how to treat it. Objectives: - To study whether genetic differences affect phantom limb pain. Eligibility: - Individuals at least 18 years of age who have lost an arm or leg at least 3 months ago. Design: - Participants will be screened with a medical history and physical exam. - Participants will answer questions about how they lost the limb, and whether they feel phantom limb pain. They will also have a test to measure their sensitivity to heat and cold. - Participants will provide a blood sample for genetic testing.
Many service members suffering major limb amputation(s) during active duty seek to return to active duty. The purpose of this study is to determine if biomechanic and/or bioenergtic differences exist between popular multi-function prosthetic feet that would facilitate return to duty for soldiers with amputations.
The goal of this project is a useful clinical instrument for diagnosis and treatment of residual limb volume fluctuation in individuals who use prosthetic limbs. One hypothesis to be tested is that the instrument effectively measures short and long term volume fluctuations in individuals with trans-tibial amputation. Another hypothesis to be tested is that when subjects add a sock or insert to the prosthesis residual limb volume decreases, and when they remove the sock or insert residual limb volume increases.
The purpose of this study is to evaluate a new prosthetic socket construction technique in order to improve the quality of care to lower extremity amputees.
This study centers around the imaging of internal structures of residual limb by means of modern radiographic imaging techniques (Dynamic Radiography-DRSA). The purpose of our research is to further study the behavior of bones and soft tissue of the socket-stump interface during dynamic tasks such as walking or brisk walking. In the long term this research could prove a basis for improvements in the general design of sockets for the new generation of prosthetic devices.
The purpose of this study is to determine if subthreshold vibration, when applied to the residual limb of a lower limb amputee through their prosthetic socket, can sufficiently enhance peripheral sensation to result in an improved ability to balance and walk.
Amputee gait produces periodic occlusion of residual limb blood vessels. During the stance phase of gait, body weight cause the prosthesis to compresses the soft tissue of the residual limb and occlude blood flow. This occlusion can be relieved during swing phase, but may depend on type of prosthesis. The purpose of the proposed research is to: (1) discover the range of tissue oxygenation in the intact and residual lower limbs of dysvascular amputees during gait and (2) to learn which of five different prosthetic limb systems provides greater tissue oxygenation.
The investigators are currently verifying early data showing that the K3 Promoter prosthetic foot affects walking efficiency or stability in transtibial, unilateral amputees when compared to their current prostheses. Phase II funds are being used to address these metrics. These studies are important basic research, however, while Tensegrity has the unique opportunity to study amputee gait and movement in the CGMA's state-of-the-art facility the investigators will expand these studies with BRDG-SPAN funding by studying the following metrics: 1. Four Square Step Test (FSST) 2. Amputee Mobility Predictor (AMP) 3. Timed Up and Go Test (TUG) 4. Quality of life (QOL) index (SF-36) 5. Activity-specific Balance Confidence Questionnaire (ABC) 6. 3D motion analysis
The purpose of this clinical trial is to determine if the experimental Tensegrity prosthetic foot offers a reduction of the amount of oxygen used while walking, if stability is improved over current prosthetic feet, and whether the experimental device actually increases activity in amputees.