Active clinical trials for "Amputation, Traumatic"

Many different factors can degrade the performance of an upper limb prosthesis users control with electromyographic (EMG)-based pattern recognition control. Conventional control systems require frequent recalibration in order to achieve consistent performance which can lead to prosthetic users choosing to wear their device less. This study investigates a new adaptive pattern recognition control algorithm that retrains, rather than overwrite, the existing control system each instance users recalibrate. The study hypothesis is that such adaptive control system will lead to more satisfactory prosthesis control thus reducing the need for recalibration and increasing how often users wear their device. Participants will wear their prosthesis as they would normally at-home using each control system (adaptive and non-adaptive) for an 8-week period with an intermittent 1-week washout period (17 weeks total). Prosthetic usage will be monitored during each period in order to compare user wear time and recalibration frequency when using adaptive or non-adaptive control. Participants will also play a set of virtual games on a computer at the start (0-months), mid-point (1-months) and end (2-months) of each period that will test their ability to control prosthesis movement using each control system. Changes in user performance will be evaluated during each period and compared between the two control systems. This study will not only evaluate the effectiveness of adaptive pattern recognition control, but it will be done at-home under typical and realistic prosthetic use conditions.

The purpose of this study is to investigate the effect of two types of education on HbA1c level and future amputations in inpatient diabetics after initial minor foot amputation

To compare the use of the semi-autonomous control algorithm (condition 1) with the standard of care myoelectric system used with the TASKA prosthetic hand (condition 2). Able bodied subjects will enroll in a laboratory based experimental session at the University of Colorado at Boulder. In a randomized order, subjects will be fitted with a by-pass prosthesis which enables the able-bodied subject to control the prosthetic hand using the myoelectric signals on their able limb. A TASKA prosthetic hand will be sensorized using the Point Touch technology. Then, the subjects will perform the ACMC outcome measure using each experimental condition. Trained observers will record the measure. Then, a direct comparison can be made both within subject performance and across subjects for the semi-autonomous control algorithm developed in Aim 2.1 and the standard of care myoelectric system used in the TASKA prosthetic hand.

The purpose of this study is to investigate the relationship between thigh strength and walking ability and assess if using a blood pressure cuff on the leg improves strength and walking performance.

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 aim of this study was to investigate MIC and non-MIC prostheses in terms of gait pattern and energy consumption in above-the-knee amputee patients.

Direct Skeletal Fixation of Prosthetic Limbs Following Trans-Femoral Amputation - Study of an Intraosseous Transcutaneous Amputation Prosthesis (ITAPTM).

The Southern Illinois University (SIU) Hand Transplant Program is a multidisciplinary research effort with the goal of restoring form and function to unilateral or bilateral upper extremity amputees by vascularized composite allotransplantation of the hand/upper extremity (hand transplantation). Hand transplantation includes transferring upper extremities/hands from deceased human donors to patients with single or bilateral hand or arm amputation. The purpose of the trial is to study functional, psychological, and immunological outcomes of human upper extremity allotransplantation.

The goals of this study are to provide sensory information to amputees and reduce phantom limb pain via electrical stimulation of the lumbar spinal cord and spinal nerves. The spinal nerves convey sensory information from peripheral nerves to higher order centers in the brain. These structures still remain intact after amputation and electrical stimulation of the dorsal spinal nerves in individuals with intact limbs and amputees has been demonstrated to generate paresthetic sensory percepts referred to portions of the distal limb. Further, there is recent evidence that careful modulation of stimulation parameters can convert paresthetic sensations to more naturalistic ones when stimulating peripheral nerves in amputees. However, it is currently unclear whether it is possible to achieve this same conversion when stimulating the spinal nerves, and if those naturalistic sensations can have positive effects on phantom limb pain. As a first step towards those goals, in this study, the investigators will quantify the sensations generated by electrical stimulation of the spinal nerves, study the relationship between stimulation parameters and the quality of those sensations, measure changes in control of a prosthesis with sensory stimulation, and quantify the effects of that stimulation on the perception of the phantom limb and any associated pain.

This study was conducted to examine the effect of visual feedback on function, stability and quality of life in transtibial amputees. A total of 24 subjects who had unilateral transtibial amputations, used prosthesis with total surface bearing socket (TSB) for at least 1 year and volunteered to participate in the study were included. Before and after Treatment subjects were evaluated with "LASAR Posture" for prosthetic weight bearing (PWB), "Berg Balance Scale (BBS)" and "Timed Up& Go Test (TUG)" for balance and functional mobility, "2-Minute-Walk-Test (2MWT)" for physical performance, "Satisfaction with the Prosthesis Questionnaire (SATPRO)" for prosthetic pleasure and "Nottingham Health Profile (NHP)" for health- related quality of life. Participants were randomly divided into two equal groups as study and control groups. After the evaluations the same exercises; PWB exercises, balance exercises, anteroposterior and lateral weight shifting, obstacle course, walking on different grounds were applied to the the study group with visual feedback methods and control group.