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ASU researchers team with Kinetic Muscles, Inc. to develop robotic arm for stroke rehabilitation

the individual's motor function improved, RUPERT would adapt to allow the user faster recovery by requiring the muscles to work independently where possible.

The first RUPERT prototype was fitted and tested on able-bodied individuals and stroke survivors at Banner Good Samaritan Regional Medical Center in Phoenix. Eight able-bodied individuals tried on RUPERT I to see how well it could be adjusted to fit each in each case. The testers ranged from 5-foot females to over-6-foot males. In addition, two stroke survivors completed a three-week course of therapy using the device. RUPERT II, a second generation prototype, is under development using results of the fitting evaluations and therapy testing at the medical center.

RUPERT I and II are powered by four pneumatic muscles to assist movement at the shoulder, elbow and wrist. The design was based on a kinematics model of the arm, which showed where to locate the pneumatic muscles and how much force was needed for normal reaching and feeding movements. The mechanical arm is adjustable to accommodate different arm lengths and body sizes.

Recent research suggests that stroke survivors can recover significant use of their arms by performing repetitive motor function exercises over a period of time. This labor-intensive physical therapy is expensive, however, claiming up to 4 percent of the national health budget, according to the National Institutes of Health. Moreover, health insurers may limit or deny coverage before stroke survivors achieve best results, Dr. He said. The availability of a device like RUPERT, that could be used at home with greater frequency and for a longer period of time, may prove to be a more cost-effective approach that would provide better results.


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4-May-2005


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