Measurement System for Kinetic Loads Acting on an Orthosis during Swing Phase

Abstract

We developed a measurement system with force-torque sensors that is able to analyze mechanical loads acting on a plastic ankle foot orthosis (PAFO) from the sole of the foot during swing phase of orthotic gait. Using this system, we compared kinetic loads applied to the orthosis during walking between hemiplegic patients and healthy volunteers. The results show that the system can be used to measure kinetic loads and revealed differences in the range of kinetic loads acting on the orthosis from the sole of the foot between the volunteer group and the patient group. The range of heel kinetic load was 11.8 times larger in the volunteer group than in the hemiplegic patient group, and the range of toe kinetic load was 2.6 times larger. In conclusion, we developed a system for measuring kinetic loads between the sole of the foot and an orthosis during swing phase. Also, some differences in kinetic loads were found between healthy volunteers and hemiplegic patients.