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Abstract

A medical communication system has an external communication module for extracorporeal use relative to a patient, and an internal communication module adapted for implantation in the patient. The external communication module has a transmitter which transmits energy to the internal communication module, which has a receiver that receives the energy and supplies it to power-consuming components in the internal communication module. The internal communication module has a transmitter which transmits a communication signal to a receiver in the external communication module. The received communication signal is analyzed in the external communication module to determine a measure of the quality of the communication signal. Dependent on whether the measure of the quality if the communication signal satisfies predetermined criterion, the transmitted energy is altered according to predetermined energy transferring rules.

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First Claim