View clinical trials related to Amputation.
Filter by:This study investigates prosthetic users´ report of passive microprocessor-controlled knees (pMPK) vs. active microprocessor-controlled knees (aMPK). Outcome measurements are assessed at baseline with the pMPK and after 4 weeks of continuous use of aMPK. Measurements consists of functional outcomes, as well as patient-reported outcomes.
The e-OPRA Implant System, is a further development of the OPRA (Osseointegrated Prostheses for the Rehabilitation of Amputees) Implant System. The e-OPRA Implant system is an implant system for direct skeletal anchorage of amputation prostheses. The added feature in the e-OPRA Implant system, is a bidirectional interface into the human body that allows permanent and reliable communication using implanted electrodes. These electrodes will provide long-term stable bioelectric signals for an improved control of the prosthetic limb. The Magnetic Bead Tracking System, which will be implanted and used in combination with the e-OPRA Implant system, is an investigational device that consists of pairs of magnetic beads, and a set of magnetic field sensors that measure and track the length of muscles and the speed at which they move in real-time. When the beads are implanted in muscle in the residual limb of an amputee, the muscle length signal is communicated to an investigational, robotic ankle-foot prosthesis. The purpose of the study is to evaluate the feasibility of a transtibial amputee with the e-OPRA Implant System and Magnetic Bead Tracking System exhibiting full neural control over a neuro-mechanical prosthetic system. A maximum of seven subjects will be enrolled. Each subject will undergo one or more surgeries where the e-OPRA Implant System and Magnetic Bead Tracking System will be implanted. The subjects will participate in follow-up sessions the last of which occurs approximately 24 months after the surgery. This is a prospective, non-randomized, uncontrolled study.
The goal of this observational study is to evaluate and compare the performance of two prosthetic feet for unilateral transtibial amputees during both indoor and outdoor activities. The main research questions aim to answer are: 1. Can a low-cost prosthetic foot enhance gait mechanics and physical performance in individuals who have undergone traumatic unilateral transtibial amputation, as compared to the traditional K2 - K3 prosthetic feet currently available on the market, during both indoor and outdoor activities? 2. Can the low-cost prosthetic foot meet user satisfaction levels after traumatic unilateral transtibial amputation, when compared to the traditional K2 - K3 prosthetic foot on the market? Participants will be asked to do 1. Prior to the commencement of the experiment, a professional prosthetist and orthotist will conduct all fitting and alignment procedures for the transtibial amputees. Participants will then be given a two to three-week period to train and acclimate to the individual socket alignment and prosthetic foot. 2. Participants are asked to refrain from consuming caffeine or any stimulants for 24 hours before the tests. 3. Participants will be required to perform the Berg Balance Test. 4. Participants will undergo a series of clinical tests, including: 1) Time to Go Up (measured in seconds), 2) Four Square Step Test (measured in seconds), 3) 10-Meter Walk Test (measured in seconds), 4) Eye Close Standing, 5) Tandem Test, and 6) Functional Reach Test. Each test will be conducted three times. The test items of 4) and 5) will be performed on a force plate (Bertect, Ohio, USA) with dimensions of 400 x 600 mm and a capturing frequency of 1,000 Hz. 5. Participants will be asked to walk on a force plate (AMTI, Advanced Mechanical Technology, Inc., Watertown, USA) at a fixed walking speed of 1.11 ± 0.11m/s, allowing the foot to land naturally on the force plate. Five trials of the gait cycle with a clean foot will be used for analysis. 6. Participants will perform the Counter Movement Jump Test three times with maximum effort on the force plate (Bertect, Ohio, USA), which will be performed without a hand swing. 7. Participants will be asked to perform a 2-minute walking test on flat concrete ground, stairs, and a ramp, respectively. 8. Finally, participants will be asked to complete the Locomotion Capabilities Index questionnaire.
The goal of this clinical trial is to investigate the repeatability of application of a fully remote method of manufacturing 3D printing of prosthetic sockets for transtibial amputees, and determine user satisfaction of sockets produced through these methods. The study also aims to evaluate the time and cost effectiveness of this production model. The main question[s] it aims to answer are: 1. To determine the repeatability and user satisfaction with transtibial sockets produced using a remote-digital method as compared to conventional manufacturing methods. 2. To determine if transtibial prosthetic users have greater prosthetic satisfaction scores across the 4 Prosthesis Evaluation Questionnaire (PEQ) subscales of Utility (UT), Appearance (AP), Sounds (SO) and Residual Limb Health (RL) with the 3D printed socket fabricated through the remote-digital method compared to the laminate socket made using the conventional method. 3. To determine if transtibial prosthetic users experience greater socket comfort with the 3D printed socket compared to the laminate socket. Participants will receive a 3D printed socket (trial intervention) and a laminate socket (control intervention) and will use each socket for a period of 4 weeks.The order of socket use will be randomised. At the end of each 4 week period, participants will rate their comfort and satisfaction with the socket. At the end of the trial, participants will indicate their preferred socket, which will be fitted to their prosthesis. Participants will attend 6 visits across a total duration of 11 weeks during the course of the study.
The aim of our study is; To evaluate the functionality of lower extremity unilateral amputees, to ensure that the results of the Medicare Functional K Classification System, which provides subjective data for the evaluator, become an objective evaluation method and to determine the functional levels of unilateral amputees; To create an objective data set by applying one-leg standing test, ten meter walking test, L test, figure-8 walking test, joint range of motion, amputee mobility estimator scale, houghton scale and joint position sense evaluation tests.
The goal of this multicenter interventional pilot is to verify the functionality of a prosthesis for trans-femoral amputees. The main question it aims to answer are: - Is to verify the technical functionality, safety and reliability of the propulsive lower limb prosthesis prototype, with active ankle, so as to provide indications regarding the technical and functional developments to be implemented in the finalization of the device. - Provide an indication of the functional effectiveness of the device and its satisfaction by patients. Participants will perform: - walking tests inside parallel bars on flat and/or inclined terrain; - walking tests on treadmill; - stair climbing/descent tests.
Individuals with an above-knee lower limb amputation are known to walk more slowly, expend more energy, have a greater risk of falling, and have reduced quality of life compared to individuals without amputation and those with below knee amputation. One of the driving factors behind these deficits is the lack of active function provided by above-knee prostheses with prosthetic knees and ankles. While many prosthetic devices have been developed for functional restoration after major lower extremity amputation, there remains no stable interface to facilitate reliable, long-term volitional control of an advanced robotic limb capable moving multiple joints. Moreover, there is no existing interface that provides useful sensory feedback that in turn enhances the functional capabilities of the prosthesis. To achieve both greater signal specificity and long-term signal stability, we have developed a biologic interface known as the Regenerative Peripheral Nerve Interface (RPNI). An RPNI consists of a peripheral nerve that is implanted into a free muscle graft that would otherwise go unused in the residual limb. As the nerve grows, it reinnervates the free muscle graft which undergoes a predictable sequence of revascularization and regeneration. The main questions it aims to answer are: 1. Can the amplitude, movement specificity and stability of sciatic nerve RPNI electromyography (EMG) signals be detected up to one year post RPNI surgery? 2. Do RPNIs contain information to enable control of a physical motorized prosthetic leg with multiple degrees of freedom? 3. Does stimulation of sciatic nerve RPNIs provides meaningful sensory feedback? Consenting participants with unilateral transfemoral amputation (TFA) will: 1. Undergo RPNI surgery and electrode implantation in the residual limb. 2. Attend regular follow-up visits following surgery to assess the health and signal strength of the RPNIs and their ability to use a prescribed prosthesis between 3- and 12-months following implantation. 3. Undergo explantation of electrodes following the conclusion of data collection.
The initial purpose of this study is to develop a prosthesis which is adjustable to use with a variety of patients in aquatic therapy. Aquatic therapy is a beneficial rehabilitation tool for individuals with limb loss. The pool environment offloads body weight, which can improve comfort on a residual limb and increase confidence in activities outside of the pool. The properties of water also assist in strengthening exercises and reducing pain. Currently, most individuals do not have a prosthesis to use in the pool. Water specific prosthesis are often not covered by insurance and can be expensive. For someone that doesn't have a water specific prosthesis, they may not be able to do therapy tasks on two legs, limiting what activities or exercises can be performed. Through creating an adjustable prosthesis, it will allow persons with limb loss to have access to a water specific leg in a time efficient, cost effective, and safe manner for rehabilitation. This study involves a novel prosthesis for use in aquatic therapy. This novel design will have an adjustable circumference, residual limb length, and height, allowing a greater number of patients to use the prosthesis.
The goal of this observational study is to compare thermographic values in the knee region of the healthy extremity and the amputated extremity and learn about the relationship between thermographic value and pain in the knee region of the amputated extremity. The main questions it aims to answer are: 1. Do thermal values in the knee region of the amputated extremity and the intact extremity differ in individuals with transtibial amputation? 2. Is there a relationship between the pain felt in the knee region of the amputated limb and the difference in thermal values between the extremities in individuals with transtibial amputation?
If a person has to have a part of their body amputated, in this case their hand, the patient then lacks information about the missing limb, which in many cases leads to pain that severely restricts their quality of life and participation in everyday life. This is usually phantom and/or neuroma pain. Phantom pain is usually caused by many different mechanisms and occurs in 80-90% of patients. Pain caused by terminal neuromas affects 13-32% of amputees and manifests itself as residual limb pain. A neuroma itself is a benign lump that can develop at the site of the defect after a nerve has been severed (neurectomy). In some cases the impairment is so severe that prosthetic tolerance, functional independence and quality of life can be severely affected. Numerous treatment options for these types of pain are far from satisfactory for many patients and remain a major challenge for both the clinician and the person affected. It is often no longer possible for the patients to pursue a profession or hobby due to the pain as well as due to the pain medication required and its possible side effects. Surgical intervention can therefore be considered for patients who do not (or no longer) respond to conservative pain treatment. In recent years, many surgical approaches have been introduced to treat or prevent post-amputee pain. One of these methods can make it possible to create an authentic feeling of the missing limb and thus reduce or eliminate phantom pain by means of targeted sensory reinnervation (TSR) of the lost body part. Sensory reinnervation means that a nerve which enables a (sensory) perception associated with a sense is "redirected" to a new area of the body and can therefore fulfil at least part of its task again. In this case, an authentic feeling of the lost body part. The aim of this retrospective data-analysis is to evaluate data from patients with hand amputation (planned surgery or caused by accident/infection..) who have undergone TSR surgery to treat or prevent phantom and neuro-pain with regard to different parameters.