Reliability evaluation of an implantable multichannel neuromuscular stimulator

The long-term reliability of an implantable, multichannel stimulator developed for neuromuscular stimulation was evaluated through a series of stress and accelerated life tests on the key components of the device. The hybrid circuit was subjected to stabilization bake, temperature cycling, burn-in, mechanical shock, and steady-state life test. The capsule with feedthroughs received vibration, mechanical shack, thermal cycling and thermal shock. The lead-connector-electrode assembly was subjected to stretching, crushing, flexing, and twisting tests. All of the samples passed the stress tests. The results of this study confirmed the reliability of the device for intended use.