Optional single pivot or polycentric steel hinges and a plastic triceps pad are available for short below elbow limbs. The terminal device is controlled by a posterior cable attached to the chest harness.
Opening terminal device is achieved by shoulder excursion or reaching forward with prosthesis. Terminal device may be replaced with voluntary opening hand and cosmetic glove.
Unlike a conventional prosthesis that requires cables, a harness and body movements to operate the prosthesis. A myo-electric prosthesis relies on muscle contractions and their resulting emg signals to power the prosthesis.
Electrodes are fabricated inside the prosthesis and make contact with the patients skin to read these contractions. When a patient makes a specific extension or flexion contraction, the electrodes read the corresponding emg signal and relays this information to the terminal device allowing it to open or close.
A wrist rotator can be added to allow rotation of the terminal device and is powered by these same emg signals. Suspension for a myo prosthesis can vary from a self suspending socket design or by adding a suspension sleeve. Optional device’s can easily be changed with the addition of a quick disconnect wrist.
The passive below elbow prosthesis is designed for those who require a light weight cosmetic prosthesis.
Although the hand and fingers are not active on a passive prosthesis, they may be re-postioned for various grips or used for opposition for the sound limb.
Fitting styles may vary from a self-suspending socket or the addition of a light weight suspension sleeve. A standard production glove may be choosen as in the photos above and below, or a full restoration style finish such as a livingskin maybe used.