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Clock synchronization in an implantable medical device system

  • US 8,396,563 B2
  • Filed: 01/29/2010
  • Issued: 03/12/2013
  • Est. Priority Date: 01/29/2010
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, from a primary implantable medical device (IMD), by a secondary IMD communicatively coupled to the primary IMD, at least one data pulse;

    receiving, from the primary IMD by the secondary IMD, at least one power pulse, wherein the at least one power pulse comprises a first power pulse;

    synchronizing, by the secondary IMD, a first clock local to the secondary IMD using the at least one data pulse;

    synchronizing, by the secondary IMD, a second clock local to the secondary IMD using the at least one power pulse, wherein the second clock is different than the first clock,estimating, based on the second clock, an arrival time of a subsequent power pulse following the first power pulse; and

    detecting, via at least one sensor of the secondary IMD, at least one condition based on an estimated arrival time of the subsequent power pulse.

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