Clinical Investigation of Interface Pressure in Transhumeral Sockets During Pick and Place Activities: Comparison of ICRC Polypropylene and Air Splint Sockets

The interface pressure between the prosthetic socket and the residual limb is critical for ensuring optimal comfort and functionality for amputees. This study investigates the dynamic pressure differences in transhumeral sockets, comparing the widely used ICRC polypropylene socket and a novel air splint socket. Fifteen transhumeral amputees participated in trials simulating pick and place activities conducted at their self-selected pace. Interface pressures were recorded using F-socket transducers, providing a comprehensive assessment of pressure distribution across the anterior, posterior, medial, and lateral regions of the sockets. Results indicated that the ICRC polypropylene socket exhibited significantly higher mean peak pressures in all regions compared to the air splint socket, with increases of 47% anteriorly, 29% posteriorly, 23% medially, and 8% laterally. These findings suggest that the air splint socket may offer superior comfort by reducing pressure and potentially minimizing pain and discomfort experienced during daily activities. This clinical investigation underscores the importance of pressure analysis in prosthetic design and may inform future developments aimed at enhancing user comfort and satisfaction.