Development of percutaneous intramuscular electrode for multichannel FES system

A percutaneous intramuscular electrode was developed for controlling paralyzed extremities by FES. The electrode was made of a Teflon-coated 19 strand rope wound from ultrafine SUS 316L stainless steel wires and was helically coiled for giving high flexibility. Because of low percentages of electrode failure in the body, stable and reliable FES was achieved for a long time.