Prostheses of upper extremity
Prostheses of upper extremity should replace the most important lost functions of the hand - the function of opening and closing the hand, i.e. capture, hold and release the object, as well as restore the appearance.
Two types of prostheses of upper extremity are proposed: passive and active.
Passive refers to cosmetic prostheses, which serve only to restore the natural appearance.
Active prostheses are mechanical and bioelectric.
Mechanical prostheses, solve simultaneously two tasks: social and working. The mechanical prosthesis recreates, as far as possible, the natural appearance of the hand, which allows a person to feel confident and comfortable in the society, and performs the functions of capturing and retaining the object. The prosthesis is activated by means of a bandage fixed on the shoulder girdle.
If a person needs to provide a broader range of activities, for example, when working in the workplace, at the backyard, etc., then the prosthesis can be easily replaced with any other working attachments, selected depending on the type of activity.
The bioelectrical prosthesis contains electrodes that read the electric current produced by the muscles when they contract, then transfer it to the microprocessor and drive the prosthesis into action. The prosthesis performs the functions of hand rotation, gripping and holding objects. In this case, the bioelectric prosthesis allows you to use such miniature things as a ballpoint pen, spoon, fork, etc.