VA Develops Prosthetic Socket Fit Sensor

Scientists at the US Department of Veterans Affairs (VA) have developed an integrated socket fit sensor that can identify pressure points in lower-limb prostheses. The cost-effective socket fit detection device incorporates a self-contained sensor assembly that helps the prosthesis user identify fit changes in real-time, according to TechLink. The device, which is designed to fit in the distal end of a socket and can replace the existing limb attachment mechanism, was developed to increase comfort and performance for people with lower-limb amputations. The sensor produces a signal in response to changes in pressure within a gas or fluid chamber, and the electronics signal the quality of fit between the residual limb and socket based on output received from the sensor. An accelerometer in the device can provide information concerning the patient’s movement (sitting, standing, swaying) while also providing usage and gait information.