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NCT07204925
The goal of this clinical trial is to understand the feasibility and effectiveness of using reinforcement learning to personalize robotic prosthetic legs (an experimental prototype) for unilateral transfemoral amputees. The main questions it aims to answer are: * With the developed RL-based Recommendation Interfacing System (RISE), clinicians are able to personalize prosthetic legs faster compared with existing manual personalization procedures. * With the developed RL-based Recommendation Interfacing System (RISE), clinicians are able to personalize prosthetic legs without detailed knowledge about how the prosthetic legs are controlled. * Patients perform better when the prosthetic legs are personalized with RISE system compared with the ones personalized manually Researchers will compare two arms (RISE guided personalization and manual personalization) to see if the tuning speed will increase and if patients can perform better. Participants will go through the standard prosthetic fitting procedures, such as alignment adjustment, then they will experience repeated prosthesis personalization procedures conducted by tuning specialists without RISE, tuning specialists with RISE, and prosthetists (without tuning expertise) with RISE on different types of terrains. In the end, the participants will go through a testing trial, in which they will experience the prototype personalized through the three different approaches without knowing how the control parameters are decided. Their walking performance will be recorded. It is expected that the participants will visit the testing site 8 times, which including alignment (1 visit), three personalization procedures (twice for each), and one testing trial (1-2 visits).
NCT05831696
The purpose of this industry-initiated research study is to test that a powered microprocessor controlled knee improves metabolic function during walking in level and sloped conditions as compared to the subject's physician prescribed prosthesis.
NCT07049198
People with transfemoral amputation face challenges such as gait asymmetry, instability, and increased energy consumption due to loss of the knee joint. Because of the loss of proprioceptive feedback from their missing limbs, visual feedback is essential for gait correction. Additionally, current visual feedback systems lack portability, cost-effectiveness, and they fail to provide precise, intuitive feedback on spatiotemporal parameters, joint angles, and both frontal and sagittal plane information, limiting their effectiveness in correcting gait abnormalities.This study aims to investigate whether gait training using a real-time 2D motion capture and visual feedback gait training system (2DMV) can improve the gait biomechanics and psychosocial functions of people with unilateral transfemoral amputation (uTFA). The 2DMV system analyzes spatiotemporal parameters and joint kinematics during gait and displays the uTFA's image on a screen, providing visual feedback specifically targeting gait abnormalities. This allows individuals with uTFA to intuitively understand the feedback and make real-time gait adjustments. The biomechanical parameters include joint kinematics, gait symmetry, and walking performance.
NCT04023045
The purpose of this research is to validate the Assist-Knee design and function by collecting pilot data during the stand-to-sit-to-stand transition in transfemoral prosthesis users when using the Assist-Knee to harvest energy and return energy .
NCT06045468
Treatment and rehabilitation after transfemoral amputation represents a challenging medical field, involving intersectoral parties. Although treatment guidelines exists, their implementation is difficult. This study is conducted to evaluate the need to practice these guidelines in order to gain best benefits for the patients. Focus is set of early inpatient rehabilitation and the role of a microprocessor-controlled prothesis (Kenevo, Ottobock).
NCT03296904
The global goal of the CYBERnetic LowEr-limb coGnitive ortho-prosthesis Plus Plus (CLs++) project is to validate the technical and economic viability of the powered robotic ortho-prosthesis developed within the 7th Framework Program - Information and Communication Technology - CYBERnetic LowEr-limb coGnitive ortho-prosthesis project, as a means to enhance/ restore the mobility of transfemoral amputees and to enable them to perform locomotion tasks such as ground-level walking, climbing/descending stairs, standing up, sitting down and turning in scenarios of real life. Restored mobility will allow amputees to perform physical activity thus counteracting physical and cognitive decline which occurs with advancing age and improving the overall health status and quality of life. This project involves players from academia, research institutions, end users, as well as robotics and healthcare industry, and has been funded by the European Commission (call identifier H2020 - Information and Communication Technology 24-2015, scope c, namely Technology Transfer - Robotics use cases, Grant Agreement 731931). The CLs++ project is an Innovation Action (IA) and foresees 2 clinical studies aimed at assessing the efficacy of the CLs++ modules in different settings. In this 1st clinical study, 16 patients with unilateral trans-femoral amputation, 8 @ the Don Gnocchi Foundation, Center of Florence, and 8 @ the Free University of Brussels, Dept. of Human Physiology, will participate in the assessment of the efficacy of the CLs++ ortho-prosthesis modules in a clinical setting.
NCT01725711
Patients with transfemoral amputations (TFA) frequently experience problems related to the use of socket-suspended prostheses 1-3. These problems increase with short or deformed stumps 4. The potential for improvement is substantial. Based on the very good long-term results with osseointegrated titanium implants for edentulous patients 5, osseointegrated hearing aids 6, cranio-facial prostheses 7 and prostheses for thumb-amputated patients 8, the clinical development of osseointegrated prostheses for TFA started in 1990, in Gothenburg, Sweden. The concept has gradually been modified and improved. In 1999, a prospective clinical trial began. The hypothesis is that the treatment will improve quality of life.
NCT02891707
This joint research project between the Department of Veterans Affairs (VA) and Department of Defense (DoD) will demonstrate that the implementation of the Mobile Device Outcomes-based Rehabilitation Program (MDORP) will improve the quality of rehabilitative care at a decreased cost to the healthcare system and a reduced burden for service members (SMs) and veterans with lower limb loss. The development of the MDORP will be executed by a multisite translational clinical care team that will use web-based mobile computing devices designed to assess mobility, enable remote prescription of targeted exercise program, and provide continual measureable outcomes to document the continuum of care with the intent of maximizing prosthetic performance while minimizing adverse medical events. The information obtained from this web-based mobile device application will be used by clinicians to promote continuity of care from the DoD and VA facilities nationwide to the community and at home.
NCT02299674
The purpose of this study is to examine the path and velocity of the center of mass (CoM) and center of pressure (CoP) during double support of persons walking with a unilateral above-the-knee prosthesis and determine the effects of prosthetic foot stiffness and effective length on CoM and CoP.Persons with a lower limb amputation walk with compensatory movements that affect the smooth trajectory of the center of mass (CoM) during weight transfer. The lack of control in the foot/ankle complex reduces fine motor movements, influencing the progression of the CoM and transfer of ground reaction forces represented by the center of pressure (CoP). Without control of the ankle joint, prosthetic users "fall" off of their trailing prosthetic limb during weight transfer, resulting in much more abrupt CoM and CoP transfers from trailing to leading limb. These abrupt movements during transfer not only increase stress on the sound limb, but also decrease the subject's energy efficiency during ambulation. The current study will further examine the CoP path and velocity in relation to the CoM path and velocity during double support of men with a transfemoral prosthesis, as well as explore how prosthetic foot ankle stiffness and effective length affects the CoP path and velocity.