Partially implantable piezoelectric middle ear hearing device. Long-term results.

In accordance with the 1992-1993 Japanese government approval of production and implementation in the health insurance system of the partially implantable piezoelectric middle ear device (P-MEI), we are conducting follow-up studies on the implanted patients. This article reports the results of the 16 cases, which are regarded as successful implantations because these patients are using the device every day as long as they are awake. A successful case is presented to illustrate the efficacy of the device.