Publications by authors named "H Pillet"
Improper socket fitting in lower-limb prostheses can lead to significant complications, including pain, skin lesions, and pressure ulcers. Current suspension and socket design practices rely predominantly on visual inspection of the residual limb and patient feedback. Monitoring stress distribution at the residual limb/socket interface offers a more objective approach.
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- A hip flexion contracture (HFC) limits hip extension and affects the gait of patients, particularly those with above-knee amputations, but its specific effects on their walking patterns are not well-studied.
- The study aimed to explore how HFC influences gait characteristics and whether the angle of the prosthetic socket has a relation to these gait changes during walking.
- Conducted with 32 participants who had above-knee amputations, the research found demographic similarities between groups with and without HFC, and analyzed various gait metrics to determine the impact of HFC and socket design on walking performance.
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- Biomechanical parameters can help in diagnosing and preventing conditions, and Finite Element Analysis (FEA) is crucial for assessing these parameters in living subjects.
- This study evaluates how different geometric modeling assumptions (homogenised monolayer vs bilayer) affect the calculated elastic properties of fat and muscle tissues, using data from seven volunteers.
- Results show that while the choice of a cost function has little effect on the overall response, using a bilayer model improves the accuracy of measuring local forces in soft tissues and better explains how loads are transmitted through them.
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- Prosthetic socket design is crucial for comfort and mobility in individuals with transfemoral amputations, heavily influenced by socket tension, muscle forces, and ischial support.
- This study introduces a MusculoSkeletal (MSK) model that includes ischial support interaction, aiming for a more accurate estimation of muscle forces in 13 subjects with unilateral transfemoral amputation.
- Results show that accounting for ischial support increases activity in abductor muscles and decreases adductor muscle activity, indicating that previous models may misestimate muscle forces affecting gait and prosthetic design.
Maintaining forward walking during human locomotion requires mechanical joint work, mainly provided by the ankle-foot in non-amputees. In lower-limb amputees, their metabolic overconsumption is generally attributed to reduced propulsion. However, it remains unclear how altered walking patterns resulting from amputation affect energy exchange.
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