Hand prosthesis can be divided into decorative and functional parts. Patients who install hand prosthesis must undergo certain rehabilitation training if they want to use it flexibly.
1, decorative hand prosthesis: generally, as long as the stump receives the cavity appropriately, the suspension device is no problem, and no training is required, but for the first time installers should learn to wear the method, passive wrist rotation, passive finger position change method. Upper arm amputees should learn to use passively controlled elbow locks.
2. Mechanical hand prostheses and electric hand prostheses (including myoelectric hand) are both functional hand prostheses. The difference lies in that the former is self-powered while the latter is externally powered. In order to improve the use of these prosthetic hand functions need correct use of guidance and training.
Daily training:
1. When wearing, put the stump into the receiving cavity first, and then connect the prosthesis to the shoulder strap.
2. Open and close hand training: the open hand of mechanical prosthesis relies on the shoulder to force forward flexion, and the prosthetic hand is closed by elasticity when it is not forced. The upper arm mechanical hand must lock the elbow joint to open the hand. The forearm emG prosthetic hand is commonly used by amputees to perform phantom limb exercises, such as stretching the wrist to control the open hand, flexion of the fingers to control the closed hand.
3. The use and training of hand prosthesis is a long-term process, and the function of hand is a process of complex sensory feedback and muscle coordination.
4. It is the most important point for flexible use of emG prosthetic hands to place the emG sensor in the strong position selected by the technician. The emG prosthesis consists of a tiny DC motor that uses a geared mechanism to drive a finger used to assist the patient's hand movement. The joint in patients with two electromyographic signal collection electrode arm the electromyographic signal of active area, collection on behalf of the fingers open and closed electromyographic signal, respectively, the two electromyographic signal input to the sets, including single chip, motor drive circuit, control module, opening and closing the output signal by single-chip microcomputer, through the motor drive circuit drive forward or reverse miniature dc motor, The prosthetic hand is closed or opened through the gear transmission mechanism, so as to drive the patient's hand to open and close the movement.