Rate control techniques for implantable pulse generator systems
First Claim
1. An implantable pulse generator system comprising an implantable pulse generator device and one or more implantable leads coupled to the implantable pulse generator device to position one or more electrodes within a patient, the system including:
- output circuitry to deliver therapeutic pulses to the patient via the electrodes;
a timing unit to request the delivery of therapeutic pulses by the output circuitry upon expiration of escape intervals;
a timing control unit to provide determine and control the escape intervals to provide a pacing rate and to provide for a maximum pacing rate;
a rate control unit to define first and second rate control time intervals relative to a first stimulation pulse delivered to the patient in a first cardiac chamber at the pacing rate determined by the timing control unit and wherein a timing of the first stimulation pulse is applied to the timing control unit in controlling in the pacing rate, the first time interval being shorter than the second time interval,wherein the rate control unit allows delivery of a second stimulation pulse to the first cardiac chamber without applying the timing of the second stimulation pulse to the timing control unit to control the pacing rate when the second stimulation pulse is requested to be delivered at a time during the first time interval, disallows delivery of the second stimulation pulse to the first cardiac chamber when the second stimulation pulse is requested to be delivered at a time following the first time interval during the second time interval, and allows delivery of the second stimulation pulse to the first cardiac chamber when the second stimulation pulse is requested to be delivered at a time subsequent to the second time interval.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention is directed to rate control techniques for implantable pulse generator (IPG) systems. The techniques make use of a plurality of timing intervals that may replace conventional rate control and allow “double-pacing” pulses to be delivered in certain instances. For example, a second pulse, i.e., a “double-pacing” pulse, may delivered within a first time interval relative to delivery of the first pulse. However, the second pulse is not allowed once the first time interval has elapsed, if a second time interval has not also elapsed. If the second pulse is delivered during the first time interval, then the second time interval is restarted and another pulse cannot be delivered until the restarted second time interval has elapsed.
34 Citations
13 Claims
-
1. An implantable pulse generator system comprising an implantable pulse generator device and one or more implantable leads coupled to the implantable pulse generator device to position one or more electrodes within a patient, the system including:
-
output circuitry to deliver therapeutic pulses to the patient via the electrodes; a timing unit to request the delivery of therapeutic pulses by the output circuitry upon expiration of escape intervals; a timing control unit to provide determine and control the escape intervals to provide a pacing rate and to provide for a maximum pacing rate; a rate control unit to define first and second rate control time intervals relative to a first stimulation pulse delivered to the patient in a first cardiac chamber at the pacing rate determined by the timing control unit and wherein a timing of the first stimulation pulse is applied to the timing control unit in controlling in the pacing rate, the first time interval being shorter than the second time interval, wherein the rate control unit allows delivery of a second stimulation pulse to the first cardiac chamber without applying the timing of the second stimulation pulse to the timing control unit to control the pacing rate when the second stimulation pulse is requested to be delivered at a time during the first time interval, disallows delivery of the second stimulation pulse to the first cardiac chamber when the second stimulation pulse is requested to be delivered at a time following the first time interval during the second time interval, and allows delivery of the second stimulation pulse to the first cardiac chamber when the second stimulation pulse is requested to be delivered at a time subsequent to the second time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method comprising:
-
delivering a first stimulation pulse to a first cardiac chamber; setting an escape interval based upon delivery of the first stimulation pulse wherein the escape interval defines a pacing rate and the pacing rate is precluded from exceeding an upper rate limit; defining and concurrently initiating first and second rate control time intervals relative to the first stimulation pulse, the first time interval being shorter than the second time interval; requesting delivery of a second stimulation pulse to the first cardiac chamber subsequent to the first stimulation pulse that does not reset the escape interval so that a timing of the second stimulation pulse does not affect the calculated pacing rate and is not limited by the upper rate limit; allowing delivery of the second stimulation pulse when the second stimulation pulse is requested to be delivered at a time during the first time interval; disallowing delivery of the second stimulation pulse when the second stimulation pulse is requested to be delivered at a time following an expiration of the first time interval but during the second time interval; and allowing delivery of the second stimulation pulse when the second stimulation pulse is requested to be delivered at a time subsequent to an expiration the second time interval. - View Dependent Claims (9, 10, 11, 12, 13)
-
Specification