Patent ID: 6038475
Filing Date: 2000-03-14
Classification: A61N,G01P

Abstract:
An implantable medical stimulator comprising a pulse generator, a sensor or accelerometer assembly mounted within the stimulator for providing a signal indicative of a patient's level of activity, and a control circuit responsive to the accelerometer signal for controlling operation of the pulse generator, the sensor assembly comprising:a generally planar layer formed from a piezoelectric material, the layer having an upper surface, a lower surface and an outer edge, the outer edge extending between the upper surface and the lower surface, the upper surface and the outer edge forming an outer surface, andan external electrically conductive layer disposed on at least portions of the outer edge and extending between at least portions of the upper surface and portions of the lower surface, the external electrically conductive layer being electrically connected to the upper surface and the lower surface;wherein at least portions of the external electrically conductive layer have been removed to form at least first and second electrically conductive regions that are electrically isolated from one another.