Occupational and Athletic Hand Injury Rehabilitation System
Hank Xu
St George's School
Floor Location : M 067 H

Up to 10% of all occupational injuries and 25% of athletic injuries, hand or wrist related injuries would create serious consequences if left disregarded. Inspired by the prevalence and the effects of these hand injuries, a spatial slider-crank (RSSP) system is presented in this paper to provide efficient recovery to the impaired hand(s) in the early stages of rehabilitation. The system features a four-finger motion assistance section and a thumb opposition section. The RSSP mechanism transforms the rotatory motion from the servo to a linear motion that moves the hand on a horizontal plane. The thumb opposition section utilizes two RSSP mechanism in one track to perform linear reciprocal tip-to-tip motion. To enable the patients to exercise alone, three potentiometers are introduced which allow the patients to adjust the frequencies and the ranges of the servomotors. The system is assessed through analyzing the force applied on the fingers and the calculated results ensured the safety and the usability of the system. Though without real-world experimental results with patients, the paper includes a grip strength and pinch strength test proposal that is backed with normative data. In the future, more sensors need to be installed, the flexibility of the system needs to be improved, and performance experiments need to be conducted and results presented as well.