Dynamic Pressure Based Prosthetic Socket Fit Diagnostic Tool

Due to the difficulties currently involved in fitting prosthetic sockets and the overall subjective nature of the process, DARPA seeks the development of innovative diagnostic tools for quantifying the characteristics of the socket-limb interface during the fitting process. In recent years, prosthetic design has made leaps and bounds implementing robotics to enhance prosthetic performance and amputee quality of life. With increased functional capability introducing new loading scenarios and the added weight of robotic actuation and control, these advanced prosthetics, such as DEKAs Luke Arm, require a better fitting socket to interface with the residual limb. ADA Technologies, in collaboration with Pressure Profile Systems (PPS), Lake Prosthetics and Research, and ToughWare PRX, proposes to develop a dynamic pressure based prosthetic socket fit diagnostic system for enhancing interface design and overall socket fitment. This system will utilize a capacitive-based tactile pressure mapping system (PMS) to measure and characterize the socket-limb interface phenomena. The long-term goal of this research is to incorporate the sensor system into an innovative dynamic socket capable of real-time fit adjustment. In Phase I, we will fully evaluate and demonstrate the merits of a capacitive-based PMS for characterizing the socket-limb interface and in turn significantly improve prosthesis comfort.