MANAGING CROSS THERAPY SENSING IN A MULTIPLE THERAPY IMPLANTABLE DEVICE

• US 20130138170A1
• Filed: 10/25/2012
• Published: 05/30/2013
• Est. Priority Date: 11/28/2011
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Ternes, David J., Brandner, Douglas J., Vijayagopal, Ramprasad, Stessman, Nicholas J., Linder, William J., Maile, Keith R., Chavan, Abhi V.
• Granted Patent: US 8,688,213 B2
• Time in Patent Office: Days
• US Class Current: 607/18
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/308 for electrocardiography [ECG]
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61B 5/686 Permanently implanted devices, e.g. pacemakers, other stimulators, biochips A61B5/6861 takes precedence
• CPC Class Codes: A61B 5/7217 of noise originating from a therapeutic or surgical apparatus, e.g. from a pacemaker
• CPC Class Codes: A61N 1/3605 Implantable neurostimulators for stimulating central or peripheral nerve system
• CPC Class Codes: A61N 1/36142 for improving safety
• CPC Class Codes: A61N 1/3704 Circuits specially adapted therefor, e.g. for sensitivity control

Abstract

An apparatus comprises a cardiac signal sensing circuit configured to sense an electrical cardiac signal from at least one of an atrium or ventricle of a heart of a subject, a therapy circuit configured to provide electrical pacing therapy and electrical autonomic neural modulation therapy to the subject, and a control circuit. The control circuit is configured to initiate delivery of the autonomic modulation neural therapy, and the control circuit includes a signal detection circuit configured to detect delivery of the autonomic neural modulation therapy in the sensed cardiac signal. The control circuit is configured to change, in response to detecting the delivery, a sensitivity of the cardiac signal sensing circuit during delivery of the autonomic neural modulation therapy.

Claims

1. An apparatus comprising:

a cardiac signal sensing circuit configured to sense an electrical cardiac signal from at least one of an atrium or ventricle of a heart of a subject;

a therapy circuit configured to provide electrical pacing therapy and electrical autonomic neural modulation therapy to the subject;

a control circuit communicatively coupled to the cardiac signal sensing circuit and the therapy circuit and configured to initiate delivery of the autonomic modulation neural therapy;

wherein the control circuit includes a signal detection circuit configured to detect delivery of the autonomic neural modulation therapy in the sensed cardiac signal; and

wherein the control circuit is configured to change, in response to detecting the delivery of the autonomic neural modulation therapy, a sensitivity of the cardiac signal sensing circuit during delivery of the autonomic neural modulation therapy.

2. The apparatus of claim 1,

wherein the signal detection circuit is configured to detect a signal artifact of the autonomic neural modulation therapy in the sensed cardiac signal,

wherein the cardiac signal sensing circuit includes at least one sense amplifier, and

wherein the control circuit is configured to increase a sensing threshold of the sense amplifier, in response to detecting the signal artifact, during delivery of the autonomic neural modulation therapy.

3. The apparatus of claim 1,

wherein the signal detection circuit is configured to detect a signal artifact of the autonomic neural modulation therapy in the sensed cardiac signal,

wherein the cardiac signal sensing circuit includes at least one sense amplifier, and

wherein the control circuit is configured to disable operation of the sense amplifier, in response to detecting the signal artifact, during delivery of the autonomic neural modulation therapy.

4. The apparatus of claim 1,

wherein the signal detection circuit is configured to detect a signal artifact of the autonomic neural modulation therapy in the sensed cardiac signal,

wherein the cardiac signal sensing circuit includes at least one sense amplifier, and

wherein the control circuit is configured to disable an output of the sense amplifier of the cardiac signal sensing circuit, in response to detecting the signal artifact, during the time interval.

5. The apparatus of claim 1,

wherein the cardiac signal sensing circuit is configured to be communicatively coupled to at least one implantable electrode, and

wherein the control circuit is configured to enable detection of the autonomic neural modulation therapy in the sensed cardiac signal according to at least one of:

a specified location of the at least one electrode;

a specified orientation of the at least one electrode;

or

a specified type of lead that includes the at least one electrode.

6. The apparatus of claim 5 including:

a physical activity sensor communicatively coupled to the control circuit, and

wherein the control circuit is configured to enable detection of the autonomic neural modulation therapy in the sensed cardiac signal according to a detected level of physical activity of the subject in association with the at least one of;

the specified location of the at least one electrode;

the specified orientation of the at least one electrode;

or

the specified type of lead that includes the at least one electrode.

7. The apparatus of claim 1, including:

a communication circuit configured to communicate information with a second separate device,

wherein the cardiac signal sensing circuit is configured to be electrically coupled to at least one implantable electrode, and

wherein the control circuit is configured to receive a communication enabling detection of the autonomic neural modulation therapy in the sensed cardiac signal from the second device according to a designation stored in the second device of at least one of;

a location of the at least one electrode;

an orientation of the at least one electrode;

or

a type of lead that includes the at least one electrode.

8. A system comprising:

an implantable device including;

a cardiac signal sensing circuit configured to sense an electrical cardiac signal from at least one of an atrium or a ventricle of a heart of a subject;

a therapy circuit configured to provide electrical pacing therapy and electrical autonomic neural modulation therapy to the subject;

a communication circuit configured to communicate information with a second separate device; and

a control circuit communicatively coupled to the cardiac signal sensing circuit, the therapy circuit, and the communication circuit, and configured to initiate delivery of the autonomic modulation neural therapy to the subject; and

an external device including;

a communication circuit configured to communicate information with the implantable device, including receiving a representation of the sensed cardiac signal from the implantable device; and

a processor circuit including a signal detection circuit configured to detect delivery of the autonomic modulation neural therapy in the representation of the sensed cardiac signal, and wherein the processor circuit is configured to communicate a change in sensitivity to the cardiac signal sensing circuit in response to detecting the delivery of the autonomic neural modulation therapy.

9. The system of claim 8,

wherein the signal detection circuit is configured to detect a signal artifact of the autonomic neural modulation therapy in the sensed cardiac signal,

wherein the cardiac signal sensing circuit includes at least one sense amplifier, and

wherein the processor circuit is configured to, in response to detecting the signal artifact,

program the implantable device to at least one of:

increase a sensing threshold of the at least one sense amplifier during delivery of the autonomic neural modulation therapy;

disable operation of the at least one sense amplifier during delivery of the autonomic neural modulation therapy; and

disable an output of the at least one sense amplifier of the cardiac signal sensing circuit during the time interval.

10. The system of claim 8, including:

a memory circuit communicatively coupled to, or integral to, the processor circuit,

wherein the signal detection circuit is configured to detect a signal artifact of the autonomic neural modulation therapy in the sensed cardiac signal,

wherein the cardiac signal sensing circuit of the implantable device is configured to be electrically coupled to at least one implantable electrode, and wherein the processor circuit is configured to enable detection of the signal artifact in the sensed cardiac signal according to a designation, stored in the memory circuit, of at least one of;

a location of the at least one electrode,

an orientation of the at least one electrode, or

a type of lead that is coupled to the implantable device and includes the at least one electrode.

11. A method comprising:

initiating delivery of electrical autonomic neural modulation therapy to a subject using an implantable medical device (IMD);

detecting delivery of the autonomic neural modulation therapy in a cardiac signal sensed by the IMD; and

changing, in response to detecting delivery of the autonomic neural modulation therapy, sensitivity of a cardiac signal sensing circuit during a time interval when the autonomic neural modulation therapy is delivered.

12. The method of claim 11,

wherein detecting delivery of the autonomic neural modulation therapy includes detecting a signal artifact of the autonomic neural modulation therapy in the cardiac signal sensed by a cardiac signal sensing circuit of the IMD;

wherein changing sensitivity of a cardiac signal sensing circuit includes increasing a sensing threshold of a sense amplifier of the cardiac signal sensing circuit during the time interval.

13. The method of claim 11, wherein changing sensitivity of a cardiac signal sensing circuit includes disabling operation of a sense amplifier of the cardiac signal sensing circuit during the time interval.

14. The method of claim 11, wherein changing sensitivity of a cardiac signal sensing circuit includes disabling an output of a sense amplifier of the cardiac signal sensing circuit during the time interval.

15. The method of claim 11,

wherein detecting delivery of the autonomic neural modulation therapy includes detecting a signal artifact of the autonomic neural modulation therapy in the cardiac signal sensed by the cardiac signal sensing circuit of the IMD;

and

wherein changing the sensitivity of the cardiac signal sensing circuit includes adjusting the sensitivity of the cardiac signal sensing circuit using the IMD.

16. The method of claim 11,

wherein detecting delivery of the autonomic neural modulation therapy includes detecting a signal artifact of the autonomic neural modulation therapy in a cardiac signal sensed by the cardiac signal sensing circuit of the IMD;

wherein detecting the signal artifact includes detecting the signal artifact in the cardiac signal sensing channel using a remote external device configured to communicate information with the IMD; and

wherein changing the sensitivity of the cardiac signal sensing circuit includes adjusting the sensitivity of the cardiac signal sensing circuit using the remote external device.

17. The method of claim 11,

wherein detecting delivery of the autonomic neural modulation therapy includes detecting a signal artifact of the autonomic neural modulation therapy in a cardiac signal sensed by the cardiac signal sensing circuit of the IMD;

wherein detecting a signal artifact includes detecting the signal artifact of the autonomic neural modulation therapy using at least one electrode connectable to a cardiac signal sensing channel to detect a cardiac activity signal,

wherein detecting a signal artifact includes enabling detection of the signal artifact in the cardiac signal sensing channel, and

wherein detection of the signal artifact of the autonomic neural therapy is enabled according to at least one of;

a specified location of the at least one electrode;

a specified orientation of the at least one electrode;

or

a specified type of lead that includes the at least one electrode.

18. The method of claim 17, wherein the at least one of the location of the at least one electrode, the orientation of the at least one electrode, or the lead type is specified by a designation entered into the IMD by a caregiver.

19. The method of claim 17, wherein the at least one of the location of the at least one electrode, the orientation of the at least one electrode, or the lead type is detectable by the IMD.

20. The method of claim 11,

wherein detecting delivery of the autonomic neural modulation therapy includes detecting a signal artifact of the autonomic neural modulation therapy in a cardiac signal sensed by the cardiac signal sensing circuit of the IMD;

wherein detection of the signal artifact is enabled according to a detected physical activity level of the subject that exceeds a specified physical activity threshold and according to the at least one of;

a specified location of the at least one electrode;

a specified orientation of the at least one electrode;

or

a specified type of lead that includes the at least one electrode.