Clock synchronization in an implantable medical device system
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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Abstract
This disclosure is directed to the synchronization of clocks of a secondary implantable medical device (IMD) to a clock of a primary IMD. The secondary IMD includes a communications clock. The communications clock may be synchronized based on at least one received communications pulse. The secondary IMD further includes a general purpose clock different than the communications clock. The general purpose clock may be synchronized based on at least one received power pulse. The communications clock may also be synchronized based on the at least one received power pulse.
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Citations
15 Claims
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1. A method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device comprising:
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a communications unit configured to receive, from a primary implantable medical device (IMD), at least one data pulse and at least one power pulse, wherein the at least one power pulse comprises a first power pulse; a communications clock unit configured to synchronize a first clock local to the device based at least in part on the at least one data pulse; and a general purpose clock unit configured to synchronize a second clock local to the device different than the first clock based at least in part on the at least one power pulse wherein the communications unit is configured to estimate, based on the second clock, an arrival time of a subsequent power pulse following the first power pulse and detect, via at least one sensor of the device, at least one condition based on the estimated arrival time of the subsequent power pulse. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification