Active clinical trials for "Amputation, Traumatic"

With the onset of prosthesis use following lower extremity amputations, body shows biomechanical changes according to the amputation level and consequently develops adaptation mechanisms both on the healthy and ampute side. The aim of this study is to determine the static postural adaptations that appear at different amputation levels.

Liberating Technologies, Inc. (LTI) has developed Pointdexter, a dexterous prosthetic fingertip that is integrated into a commercial prosthetic hand and allows for an additional fine grasp. The Pointdexter device interfaces with upper limb prostheses by swapping the usual prosthetic pointer finger with the Pointdexter device. The dexterous prosthetic fingertip utilizes the same control strategy used to operate the prosthetic hand. This solution aims to combine the advantages of the common terminal devices into one product by combining the practicality and dexterity of a split-hook or gripper with the aesthetics of multi-articulating hands.

Lower limb amputation (LLA) commonly affects young and active people who have long life expectancy. It is a major surgery causing many functional deficiencies which can reduce overall health quality and physical condition of the wounded persons and necessitating a multidisciplinary rehabilitation programme. High-frequency ultrasonography (US) is useful in evaluating peripheral nerves because of it has many superiority to other techniques. The advantages of US is; it has high resolution but no ionized radiation. It is possible to make dynamic and real-time imaging. It was showed that US have the same specificity and more sensitivity than magnetic resonance (MR) imaging in evaluating peripheral nerves. The aim of this study is to evaluate the sciatic, tibial and peroneal nerves of traumatic lower-limb amputees with the help of sonography and find the relationship between sonographic values and clinical characteristics.

Knee extension strengthening is one of the cornerstones of rehabilitation in prosthesis users with transtibial amputation. It is recommended in terms of increasing functional mobility, preventing the risk of fall and knee osteoarthritis. Therefore, there is a need for objective measurements to evaluate changes in functional strength and walking through the rehabilitation process. Muscle thickness measured by ultrasound was found to be valid and highly correlated with magnetic resonance imaging and dual-energy X-ray absorptiometry measurements and shown to reflect the strength and functional outcomes in various diseases. The first aim of this study is to reveal the rectus femoris muscle thickness alteration in prosthesis users with transtibial amputation compared to able-bodied controls and establish its correlation with functional strength and walking tests. The second aim is to determine intra- and inter-rater reliability and construct validity of the rectus femoris muscle thickness measured by ultrasound in prosthesis users with transtibial amputation.

Amputees often choose not to wear prostheses due to marginal performance or may settle for a prosthesis that offers only cosmetic improvement, but lacks function. A simulation tool consisting of a robotics-based human body model (RHBM) to predict functional motions, and integrated modules for aid in prescription, training, comparative study, and determination of design parameters of upper extremity prostheses will be developed. The main objective of collecting and analyzing human movement during several common tasks is to optimize and validate the robotics based human model. The range of motion data of subjects performing activities of daily living such as opening a door, turning a wheel, grooming, eating, bilateral lifting, as well as recreational and sport activities such as swinging a baseball bat, and golf club will be analyzed. This motion analysis data will also be used to compare data between four groups: a control group (n=10), a braced group simulating prosthesis use (n=10), a group wearing a transradial prosthesis (n=10) and a group wearing a transhumeral prosthesis (n =10).

Post traumatic amputees with an experience of over 3 months of prosthesis use at home, without any known difficulty using the prosthesis and without stump pathology, using no assistive devices, will be examined in a 3 D computerized gait laboratory. Kinematic and kinetic parameters of gait will be obtained.

The aim of this study is to investigate the relationship between sagittal spinopelvic parameters and low back pain and quality of life in individuals with lower extremity amputation.

The aim of this study is to compare the sitting and standing postural stability of transfemoral individuals with healthy individuals with similar demographic characteristics.

The purpose of this study is to assess weight change in a population of Veterans with amputations. Little is known about the how weight changes following an amputation. It is widely believed that many patients experience weight gain following amputation. This study aims to identify magnitude of weight changes following amputation and determine characteristics associated with weight gain. Information on weight change trajectories would be useful to better understand long-term health consequences associated with amputation and to design and target interventions to encourage weight maintenance and general health promotion for groups at high risk of weight gain.

The proposed study aims to characterize biological ankle joint function during walking and running on slopes in order to further develop advanced powered ankle-foot prostheses. Ankle joint torque and angle data will be collected from non-amputees while walking and running at multiple speeds and slopes. This data will be used to develop control parameters for a powered ankle-foot prosthesis. Then, these parameters will be implemented and tested in a powered prosthesis worn by people with below the knee amputations.