Surlyn Socket Upper-Extremity Prostheses
Sixty patients with above-elbow or below-elbow amputations have been fitted with Surlyn sockets. The group includes 14 myoelectric belowelbow and one myoelectric above-elbow prosthesis. Surlyn contributes to comfort, is easy to adjust for growth, helps to dissipate heat, reduces weight, increases hygiene because it is easy to clean, and aids suspension through increased skin adhesion.
We use 3/16 inch Surlyn in a 30 x 30 cm (12 x 12 in) frame. An inner support frame is laminated over the Surlyn socket, a nylon stocking, and a polyvinylalcohol bag. Two Perlon and two nylon stockinette layers have star washers between the layers. These are laminated with 30 percent flexible polyester resin. The resin permits frame removal by cautious heating with a heatgun. Using nylon and a polyvinylalcohol bag to separate the socket and inner frame, we foam and shape it. The foam is separated with polyvinylalcohol. Lamination is performed, the pieces separated, and the socket is trimmed so that the inner frame is approximately 0.5 cm (1/4 in) below the proximal socket trimline to insure good supracondylar suspension.
Shriners Hospital for Crippled Children, 3101 SW Sam Jackson Park Road, Portland~ OR 97201.