Apparatus and method for quantification of the desynchronization between the clocks of two hbc active implants

An active implantable medical device, comprising:

• an apparatus for providing information to determine a desynchronization between the active implantable medical device and a second medical device, the apparatus comprising:
• a transmitter/receiver of wireless communications;
• a first clock having a first pulse rate;
• and
• a second clock having a second pulse rate higher than the first pulse rate;
• the apparatus configured to:
• receive a synchronization query from the second medical device, the synchronization query being transmitted in response to a predetermined transition of a third clock of the second medical device, the third clock having the first pulse rate;
• determine a number of pulses of the second clock of the apparatus occurring between reception of the synchronization query and a predetermined transition of the first clock of the apparatus;
• and
• transmit a response signal to the second medical device configured to allow the second medical device to determine the desynchronization between the active implantable medical device and the second medical device based on the determined number of pulses of the second clock.

A computer-readable storage medium having instructions stored thereon that, when executed by a processor of an implantable medical device, cause the implantable medical device to perform operations comprising:

• selectively activating a first clock of the implantable medical device upon reception of a synchronization query from a second medical device, the first clock having a first pulse rate;
• determining a number of pulses of the first clock of the implantable medical device occurring between reception of the synchronization query and a predetermined transition of a second clock of the apparatus, wherein the first pulse rate is higher than a second pulse rate of the second clock;
• wherein the synchronization query is transmitted in response to a predetermined transition of a third clock of the second medical device, the third clock having the second pulse rate;
• and
• wherein the operations further comprise:
• deactivating the first clock of the implantable medical device after detection of the predetermined transition of the second clock;
• and
• determining the desynchronization between the implantable medical device and the second medical device based on the determined number of pulses of the first clock.

A system for determining a desynchronization between a first implantable medical device and a second implantable medical device, comprising:

• a first implantable medical device comprising:
• a first transmitter/receiver of wireless communications;
• a first clock having a first pulse rate;
• and
• a second clock having a second pulse rate higher than the first pulse rate;
• and
• a second implantable medical device comprising:
• a second transmitter/receiver of wireless communications;
• a third clock having the first pulse rate;
• and
• a fourth clock having the second pulse rate;
• wherein the system is configured to:
• detect a predetermined transition of the first clock of the first implantable medical device and in response, transmit a synchronization query to the second implantable medical device;
• receive the synchronization query at the second implantable medical device;
• determine a number of pulses of the fourth clock of the second implantable medical device occurring between reception of the synchronization query and a predetermined transition of the third clock of the second implantable medical device;
• transmit a response signal from the second implantable medical device to the first implantable medical device;
• determine a number of pulses of the second clock of the first implantable medical device occurring between transmission of the synchronization query and reception of the response signal;
• and
• determine the desynchronization between the first implantable medical device and the second implantable medical device based on both the determined number of pulses of the second clock and the determined number of pulses of the fourth clock.