Long-Term Follow-up of Children Wearing ISNY Above-Knee Sockets

DAVID E. KREBS, PHD, PT*, JOAN E. EDELSTEIN, MA, PTAND SIDNEY FISHMAN, PHDNew York, New York


ISNY Above-Knee Flexible Sockets have been applied successfully to adult and juvenile amputees. Ten children (ages 5 to 15) were provided a growthadjustable ISNY socket retrofitted to the current knee and shank. About half were provided suction suspension with their ISNY socket. None had previously worn suction with their rigid laminate sockets.

ISNY prostheses were strongly preferred primarily because of improved comfort. The polyethylene socket permitted greater utilization of adult-like suction suspension, thus freeing the children from encumbering suspension devices; indeed, suction was utilized successfully on a 5-year-old and on children with very short (4 inches or less) amputation limbs. Those who preferred not to use suction also experienced greater comfort. As the children grew, sockets were replaced as necessary; eight amputees have had at least one replacement. The clinics found the socket translucency and easy interchangeability to enhance greatly the task of maintaining proper fit. Long-term results indicate that the ISNY AK socket is more comfortable, can be kept well-fitting utilizing the same prosthesis for at least two years, and can utilize suction suspension for shorter amputation limbs at an earlier age.

*New York University, Prosthetics and Orthotics, 317 East 34th Street, New York, NY 10016