Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Transfemoral"”.
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Achieving Near-Natural Locomotion in Transfemoral Amputees - A Control Theoretic Approach
Amputation of the lower limb is prescribed to address conditions such as trauma, vascular issues, tumors, neuropathy, frostbite, and complications from diabetes. Post-surgery, the individual has to be fitted with a prosthetic limb to regain mobility. While a good-fitting, well-designed prosthetic …
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Developing an evidence-based instrument to guide transfemoral prosthetic prescription in South Africa
… an evidence-based screening instrument to guide transfemoral prosthetic prescription in South Africa. Objectives: i) To determine evidence-based variables that can be used to guide screening for transfemoral prosthetic prescription through a scoping review of literature from the Global South. ii) …
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Development of a Solution Method to Promote Proper Bandaging Techniques for Transfemoral Amputees
… of permanent damage due to improper bandaging. Transfemoral amputees are often confined to a wheelchair and spend the most time without a prosthesis fitted compared to any other lower limb amputee. An effective method in achieving the optimum residual limb shape, while promoting proper bandaging …
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Design of low-cost, fully passive prosthetic knee for persons with transfemoral amputation in India
An estimated 230,000 above-knee amputees are in need of prosthetic devices in India with a majority of them facing severe socio-economic constraints in their daily lives. However, only a few passive prosthetic knee devices in the market have been designed to enable normative gait and to meet the …
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Design, Test, and Evaluation of a High Powered 4 DOF Prosthetic Leg for Transfemoral Amputees
A high powered 4 DOF prosthesis for transfemoral amputees is presented in this paper. The prosthesis utilizes series elastic actuators with high powered hobby grade helicopter motors capable of providing 2880~W of power each for knee and ankle pitch and ankle roll. In addition, a yaw motor with a …
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A bone-anchored mechanoneural knee prosthesis to enhance control and embodiment
… applied toward neurorobotic control at the transfemoral level. The first part of this dissertation explores the neurophysiological and neuromechanical outcomes of a revisional transfemoral amputation that restores agonistantagonist muscle dynamics. A within-subjects study is performed to …
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Frameworks for the design of passive prosthetic knee components using user-centered methods and biomechanics of level-ground walking
… prosthetic knee components that can enable transfemoral (above-knee) amputees to ambulate with minimal gait deviations leading to higher user satisfaction. The goal of developing these frameworks is ultimately to design a low cost, fully passive prosthetic knee device for persons with …
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Variable damping controller for a prosthetic knee during swing extension
Transfemoral amputees exhibit both increased metabolic consumption and gait asymmetry during level ground walking. A variable damping control strategy has been developed for swing extension in order to improve gait symmetry and reduce energy expenditure during level ground walking. Preliminary …
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Giving birth to a new approach: a retrospective comparison of radiation safety parameters between transradial and transfemoral approaches for uterine fibroid embolization at Groote Schuur Hospital, South Africa
… symptomatic uterine leiomyomas. The conventional transfemoral access (TFA) in UAEs remains the method of choice for the majority of South African interventional radiologists. Transradial access (TRA) has grown as a viable alternate vascular access. The advantages of TRA over TFA have been well …
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Impact of Transradial Approach in Patients with High Risk Acute Coronary Syndrome Undergoing Percutaneous Coronary Intervention and Abciximab on In-Hospital Clinical Outcomes and Bleeding Complications
… and vascular complications when compared with transfemoral coronary intervention (TFI). The benefit of TRI might be enlarged in patients at high risk of bleeding. The purpose of this study was to evaluate clinical outcomes comparing transradial and transfemoral approaches in the treatment of …
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Identification of design requirements for a high-performance, low-cost, passive prosthetic knee through user analysis and dynamic simulation
… low-cost, passive prosthetic knee for transfemoral amputees in India. The knee was primarily intended to improve the walking gait of amputees relative to existing low-cost devices. This thesis aimed to identify detailed design requirements for the prosthetic knee through user analysis …
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Design and evaluation of a biomimetic agonist-antagonist active knee prosthesis
… impedance control, can improve unilateral transfemoral amputee locomotion in level-ground walking, reducing the metabolic cost of walking at selfselected speeds. To evaluate this hypothesis, a preliminary study investigated the clinical impact of the active knee prosthesis on the metabolic …
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Adjusting and Logging Rheo Knee Parameter Values Using a Smartphone Application
… produced by Össur which is designed for use by transfemoral amputees. The smartphone application includes functionality which allows it to transfer parameter data from the Rheo Knee to a Google sheet database, as well as adjust parameter values within the Rheo Knee. The adjustment of these …
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Exploring the role of damping in a passive prosthetic knee through modeling, design, and testing
… field and clinical testing with unilateral transfemoral amputees. The results of the studies showed that not only damping is required to prevent hyper flexion, but the optimal damping range allows achieve a peak knee flexion close to able-bodied. In future design, the validated damping …
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Fluidic Flexible Matrix Composite Wafers for Volume Management in Prosthetic Sockets
Persons with transfemoral (above knee) and transtibial (below knee) prostheses experience changes in the volume of their residual limb during the course of the day. These changes in volume unavoidably lead to changes in quality of fit of the prosthesis, skin irritations, and soft tissue injuries. …
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Integrated Prosthetic Leg Design Frameworks for People with an Above-Knee Amputation
… to achieve target peak knee flexion angle in transfemoral amputees was determined using a simple three-step framework. This framework incorporates effects from common transfemoral prosthetic gait deviations, such as slower self-selected walking speeds and delay in initiation of knee flexion …
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Thirty-Day Readmissions after Early versus Delayed Discharge after Uncomplicated Transcatheter Aortic Valve Replacement: Insights from the Nationwide Readmissions Database
… vs late (≥3 days) discharges after uncomplicated transfemoral TAVR (propensity matched cohort) using Kaplan-Meier methods. Additionally, we examined factors associated with failure of early discharge using logistic regression and testing for interactions of patient factors with discharge strategy. …
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Experimental porcine models of retinal ischemia
… The retinal circulation could be accessed by transfemoral endovascular catheterization, and the afferent arteries could be occluded using a balloon catheter for temporary occlusion, and a liquid embolic agent or coiling for permanent occlusion. The degree of ischaemia depended on the location …
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Design and control of powered lower limb prostheses
… were focused on the design and control of transfemoral (TF, also known as above-knee) prostheses powered by pneumatic muscles, an extraordinary actuator with superb power-to-weight ratio. The first prototype incorporates powered knee and ankle joints in a volumetric profile similar to that …
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Cognitive representations and attitudes as predictors of prosthetic use and recovery following lower limb amputation
… Approximately 65% of transtibial and 25% of transfemoral amputees are fitted with a prosthesis, however, of those fitted, around 40% are known not to use their prosthesis, or to use it only occasionally, following discharge from rehabilitation. Additionally, post-operative rehabilitation …
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