APPARATUS AND METHOD FOR THE CONTROL OF AN IMPLANTABLE DEVICE

摘要

An implantable medical device (10) includes a giant magnetoresistance ratio (GMR) sensor (74) used to detect the presence of a magnet (124) in order to command the device to enter a predetermined mode of operation. The GMR responds to a modulated magnetic field generated by the programming of a command transmitter apparatus (120) for non-invasive programming or controlling of the implanted device. The present invention also monitors for the presence of a steady magnetic field (126) to place the implanted device in a known, safe mode.