Fault tolerant implantable pulse generators and implantable cardioverter-defibrillators incorporating physiologic sensors and methods for implementing fault tolerance in same
First Claim
1. An apparatus comprising:
- an implantable physiologic mechanical sensor for providing an output signal related to one or more physiologic parameters of a subject;
a first electrical conductor coupled to the sensor;
an implantable medical device comprising a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue;
means for selectively energizing the sensor via the first electrical conductor;
a second electrical conductor coupled to the implantable medical device and receiving the output signal from the sensor;
an output signal processing circuit coupled to the second electrical conductor; and
means for excluding signals on the second conductor from the output signal processing circuit during a temporal window corresponding to the therapy delivery of a therapy pulse.
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Accused Products
Abstract
This disclosure relates to fault tolerant instantiations of a cardiac therapy delivery device such as an implantable cardiac stimulator (e.g., an implantable pulse generator, IPG, and/or an implantable cardioverter-defibrillator, ICD) coupled to an implantable physiologic sensor (IPS). According to the disclosure delivery of cardiac pacing and/or cardioversion-defibrillator therapy delivery can cause errors in output signals from an IPS. Resolution of such errors involves selectively energizing (or disconnecting the output signal from) the IPS during pacing and/or defibrillation therapy delivery. Programmable signal “blanking” in lieu of or in addition to the foregoing also improves the integrity of the output signal (i.e., continuously energize the IPS and ignore parts of the output signal). An ICD having a transient weakness in an insulated conductor used for the IPS signal can likewise have the IPS de-energized and/or blank the IPS output signal during high voltage therapy delivery.
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Citations
29 Claims
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1. An apparatus comprising:
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an implantable physiologic mechanical sensor for providing an output signal related to one or more physiologic parameters of a subject; a first electrical conductor coupled to the sensor; an implantable medical device comprising a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively energizing the sensor via the first electrical conductor; a second electrical conductor coupled to the implantable medical device and receiving the output signal from the sensor; an output signal processing circuit coupled to the second electrical conductor; and means for excluding signals on the second conductor from the output signal processing circuit during a temporal window corresponding to the therapy delivery of a therapy pulse. - View Dependent Claims (2, 3)
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4. An apparatus comprising:
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an implantable physiologic sensor for providing an output signal related to one or more physiologic parameters of a subject; a first electrical conductor coupled to the sensor; an implantable medical device comprising a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively energizing the sensor via the first electrical conductor; a second electrical conductor coupled to the implantable medical device and receiving the output signal from the sensor; an output signal processing circuit coupled to the second electrical conductor; and means for excluding signals on the second conductor from the output signal processing circuit during a temporal window corresponding to the therapy delivery of a therapy pulse; wherein the sensor comprises a blood-based sensor.
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5. An apparatus comprising:
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an implantable physiologic mechanical sensor for providing an output signal related to one or more physiologic parameters of a subject; a first electrical conductor coupled to the sensor; an implantable medical device comprising a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively energizing the sensor via the first electrical conductor; a second electrical conductor coupled to the implantable medical device and receiving the output signal from the sensor; means for excluding the output signal during a temporal window corresponding to the therapy delivery of a therapy pulse. - View Dependent Claims (6, 7)
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8. An apparatus comprising:
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an implantable physiologic sensor for providing an output signal related to one or more physiologic parameters of a subject; a first electrical conductor coupled to the sensor; an implantable medical device comprising a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively energizing the sensor via the first electrical conductor; and a second electrical conductor coupled to the implantable medical device and receiving the output signal from the sensor; and means for excluding the output signal during a temporal window corresponding to the therapy delivery of a therapy pulse; wherein the sensor comprises a blood-based sensor.
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9. An apparatus comprising:
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an implantable physiologic sensor for providing an output signal related to one or more physiologic parameters of a subject; a first electrical conductor coupled to the sensor; an implantable medical device comprising a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively energizing the sensor via the first electrical conductor; and a second electrical conductor coupled to the implantable medical device and receiving the output signal from the sensor; and means for excluding the output signal during a temporal window corresponding to the therapy delivery of a therapy pulse; wherein the sensor comprises an ion-selective electrode.
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10. An apparatus for improving the accuracy of a device comprising an implantable lead comprising a physiologic mechanical sensor mounted thereon and an implantable medical device coupled to the lead, wherein:
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the implantable physiologic sensor is adapted to provide an output signal related to one or more physiologic parameters of a subject; the lead comprises a first dedicated electrical conductor coupled to the sensor; the implantable medical device comprises one of an implantable pulse generator (IPG) circuit and an implantable cardioverter-defibrillator (ICD) circuit adapted for therapy delivery to a portion of tissue and comprising means for selectively energizing the sensor via the first electrical conductor and an output signal processing circuit; the lead comprises a second dedicated electrical conductor coupled to the output processing circuit and receiving the output signal from the sensor; and means for excluding the output signal on the second dedicated conductor from the output signal processing circuit during a temporal window corresponding to the therapy delivery by one of the IPG and the ICD circuits. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus for improving the accuracy of a device comprising an implantable lead comprising a physiologic sensor mounted thereon and an implantable medical device coupled to the lead, wherein:
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the implantable physiologic sensor is adapted to provide an output signal related to one or more physiologic parameters of a subject; the lead comprises a first dedicated electrical conductor coupled to the sensor; the implantable medical device comprises one of an implantable pulse generator (IPG) circuit and an implantable cardioverter-defibrillator (ICD) circuit adapted for therapy delivery to a portion of tissue and comprising means for selectively energizing the sensor via the first electrical conductor and an output signal processing circuit; the lead comprises a second dedicated electrical conductor coupled to the output processing circuit and receiving the output signal from the sensor; and means for excluding the output signal on the second dedicated conductor from the output signal processing circuit during a temporal window corresponding to the therapy delivery by one of the IPG and the ICD circuits; wherein the sensor comprises a blood-based sensor. - View Dependent Claims (18)
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19. An apparatus comprising:
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a lead comprising first and second conductors and comprising an implantable physiologic sensor providing an output signal on the second conductor related to one or more physiologic parameters of a subject in response to an energizing signal on the first conductor; and an implantable medical device comprising; a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively providing the energizing signal to the sensor means via the first electrical conductor; an output signal processing circuit coupled to the second electrical conductor; and means for excluding signals on the second conductor from the output signal processing circuit during a temporal window corresponding to the therapy delivery of a therapy pulse. - View Dependent Claims (20, 21, 22, 23)
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24. An apparatus comprising:
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an implantable lead comprising first and second electrical conductors; an implantable medical device coupled to the first and second electrical conductors and comprising; a pulse generator circuit adapted for delivery of therapy pulses to a portion of tissue; means for selectively providing a energizing signal to the first electrical conductor; and means for excluding signals on the second conductor from the implantable medical device during a temporal window corresponding to the therapy delivery of a therapy pulse; and wherein the lead further comprises an implantable physiologic sensor providing an output signal on the second conductor related to one or more physiologic parameters of a subject in response to an energizing signal on the first conductor. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification