RESULTS OF A STUDY WITH THE GOAL TO OPTIMISE HARNESSES BY MEANS OF UP-TO-DATE BIOMECHANICAL ENGINEERING

Abstract

Body harnesses control body-powered and hybrid prostheses of the upper extremities. They transfer muscular forces from the amputee through motion of the shoulder girdle or stump directly to the artificial limb. The development of body harnesses requires not only to look at technical possibilities, but even more important, to take the biomechanical abilities of the patient into consideration. Different tests were performed to identify typical motion patterns of the patients and to measure the forces produced thereby. Founded on the results of this biomechanical study and the comparison between different harnesses, a new above elbow body harness has been developed. It was ergonomically optimised to provide a more efficient force transmission. Modern materials and easily replaceable axillar pads complete the advantages and support today’s hygienic aspects. There are new accessories available allowing easy and fast adaptation of the harness to patient and prostheses without any need for sewing.