International Journal of Experimental and Computational Biomechanics
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International Journal of Experimental and Computational Biomechanics (1 paper in press)
Evaluating effect of amputees physical parameters on pressure at lower-limb prosthetic socket by Chitresh Nayak, Deepak Unune, Amit Singh, Himanshu Choudhary Abstract: Intrasocket pressures can cause the tissue trauma or discomfort to amputees wearing the prosthetic devices. This paper presents a methodology for evaluating the role of amputees physical parameters viz. height, weight, and stump length on pressure generated at the prosthetic limb/socket interface using regression technique. An experimental setup has beed developed for force investigation of the lower-limb socket using the FlexiForce sensor. The intrasocket pressure values at lateral tibia, gastrocnemius, patella tendon bearing, kick point, medial tibia, medial gastrocnemius, popliteal depression, and lateral gastrocnemius on the transtibial residual limb have been collected for three different conditions viz. walking, full load and half load for ten patients. Mathematical models for pressure at three loading conditions have been developed using regression analysis using which the effective pressure at considered specific regions can be correlated with physical parameters. The models suggested that the weight of amputee is a strong predictor of pressure at the socket. The developed methodology will assist the amputee-specific socket design ensuring comfortable socket fitting. Keywords: Stump-socket interface; pressure measurement; regression analysis; socket fitting.