Development and evaluation of a method to measure wrist range of motion on paretic hand rehabilitation device

This paper presents the development of wrist ROM measurement system that was implemented on a rehabilitation glove for paretic hand, Easy-Flex, using a rotary potentiometer. This approach enables the device to measure the angles of up to 80° with the approximate resolution of 0.1°. The method along with a universal goniometer and a smartphone clinometer application were tested on 17 healthy participants in terms of reliability. The three instruments were able to accurately measure three different angles (flexion: -10°, neutral: 0°, and extension: 20°) with measurement errors less than 2^°. Moreover, ICCs of the proposed method were close to 0.90 indicating the method implemented on Easy-Flex is reliable for measuring wrist flexion and extension measurement.