Patent ID: 8855782

Claim:
A medical device system for monitoring a condition of a patient the system comprising: an implantable medical device comprising a transceiver, a random access memory, and a processor coupled to the transceiver and the random access memory, wherein the processor is configured to: wirelessly transmit a plurality of proximity test signals as part of a proximity test protocol; determine for each of the plurality of proximity tests whether a response has been received from an external device within a certain time after sending the corresponding proximity signal, thereby generating a plurality of proximity test results which include a time stamp of each of said proximity test signals sent, whether said external device has received said proximity test signals and the number of times said proximity test signals were sent during a time interval; apply a test to the plurality of proximity test results to determine whether a proximity failure condition, or pass condition, exists; whereby when either a proximity failure condition or a pass condition exists, create a plurality of records in the random access memory for both proximity pass or failure conditions including the test results reflecting whether a patient is maintaining the external device in sufficient proximity to the implantable medical device during said interval; and store the plurality of records as to both the pass and the proximity failure conditions of the proximity test signals to be displayed for aiding in the determination of non-modification or modification to the patient's activities based upon the test results.