We present a new system for the delivery of electrical stimulation therapy. The system comprises miniature implants and external transmitting devices. Clinical trials for the treatment of shoulder subluxation and weak muscles caused by knee osteoarthritis have started in Canada and Italy.
More trials are underway.
Introduction Electrical stimulation of weak or paralyzed muscles has been used for many years in research settings and in clinics. Although there are many potential applications for this mode of therapy, clinical implementations have been slowed by technological limitations of present transcutaneous, percutaneous and implantable systems. We have developed a new system in which wireless microstimulators injected into muscles are controlled and powered by a small external radio transmitter. This system combines the precise muscle recruitment and easy implantability of percutaneous electrodes with the long-term safety and convenience of fully implanted systems. Clinical trials in Canada and Italy are underway for two of the many potential applications of this generic technology.