Charger for implant

摘要

A system for supplying energy to an implantable medical device when implanted in a patient's body can comprise an internal charger arranged to be implanted in the patient's body, the internal charger comprising a first coil. The system can further comprise an external charger arranged to wirelessly transmit energy to supply power to the internal charger, using a second coil. The system also comprises a wireless feedback system arranged to transmit feedback information from the internal charger to the external charger. The feedback information is based on information from at least one Radio Frequency Identification (RFID) transmitter. Hereby a user of the system can optimize the position of the external power supply in relation to the internal power supply based on the received feedback information. This in turn will result in a better and more robust energy transfer to the implanted medical device.

主权项

1. A system for supplying energy to an implanted medical device for implantation in a patient's body, comprising an internal charger arranged to be implanted in the patient's body, the internal charger comprising a first coil,
an external charger arranged to wirelessly transmit energy with an electromagnetic field to supply the internal charger with energy, the external charger comprising a second coil, and a wireless passive feedback system adapted to be powered by a wireless signal transmitted by the external charger and arranged to transmit feedback information from the internal charger to the external charger, wherein the feedback information is based on information obtained from at least one radio frequency identification (RFID) transmitter, wherein an RFID signature is set in response to a magnitude of the electromagnetic field received as actively measured by a measurement unit in the internal charger, measuring an electric parameter, wherein the measuring unit of the internal charger provides to the at least one RFID transmitter a determined value related to the magnitude of the received electromagnetic field and the at least one RFID transmitter is adapted to set and change its identification according to the determined value related to the magnitude of the received electromagnetic field and to be passively powered by the wireless energy, transmit the changed identification as feedback, and wherein the external charger is arranged to regulate the wirelessly transmitted energy based on a relation between; the feedback information being related to an amount of energy received in the first coil, and an amount of wirelessly transmitted energy by the second coil.