A very slight pull on a simple harness is all that is needed to control the Utah Arm system. Relative to body-powered cables, the excursion and harness force required for ServoPro control is far lower, and thus the prosthesis is more comfortable. Compared with harness mounted switches for other electric elbows, ServoPro control provides much more functional control because of the proportionality and sensitivity of the controller. That is, the ServoPro wearer can control the elbow position and the hand force with much better precision than switch control can provide. The ServoPro control option allows the same delicate proportional control of Utah Arm elbow and hand function using a simple pull on a harness strap instead of the usual EMG sensors.
Servo control is accurate and easy because it uses feedback from sensors in the elbow and hand.
Fitting the ServoPro is sometimes easier than the myoelectric version because electrode contact problems are not an issue. This is ideal for amputees at the shoulder, brachial plexus-injured patients, or those with severe weight change, etc. Previously fitted Utah Arms can be easily modified to incorporate the ServoPro. The new ProControl 2 is one-third the size of the original ProControl. Read a wearer's comments about the ProControl 2.