Upper arm prosthesis defect

After amputation of the upper arm, due to the loss of elbow joint, the function of the upper arm is seriously lost; Although the assembled upper arm prosthesis has a dynamic elbow joint, it is not only complicated in control system, but also difficult in practical operation to accurately realize the coordination between elbow flexion and extension and the opening and closing of the prosthetic hand. Therefore, the compensation function of upper arm prosthesis is far less than that of forearm prosthesis, and its operation training is more important.

Upper arm amputees can install cable-controlled upper arm prostheses, electromyography-controlled or switch-controlled electric hands, hybrid upper arm prostheses, and of course decorative upper arm prostheses. Decorative upper arm prosthesis is especially suitable for patients who only pay attention to portability and beauty and give up wearing functional prosthesis. The receiving cavity of modern upper arm prosthesis adopts full-contact receiving cavity made of vacuum-formed synthetic resin, and the receiving cavity of upper arm prosthesis with short residual limb needs to adopt double-structure receiving cavity composed of full-contact inner receiving cavity and outer arm tube to ensure the stable suspension of prosthesis and control the prosthetic hand more accurately.