Medical device recharging based on patient activity

Patent metadata

Field	Value
Publication number	US-12102833-B2
Application number	US-202117199051-A
Country	US
Kind code	B2
Filing date	Mar 11, 2021
Priority date	May 22, 2017
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

Devices, systems, and techniques for controlling charging power transmitted to an implantable medical device during a recharging process based on patient activity are disclosed. Various example techniques include a method comprising receiving, by processing circuitry, an activity signal generated by an implantable medical device and indicative of an activity level of a patient during charging of a rechargeable power source of the implantable medical device implanted in the patient, determining, by the processing circuitry and based on the activity signal, a patient status for the patient during charging of the rechargeable power source, and controlling, by the processing circuitry and based on the patient status, charging of the rechargeable power source of the implantable medical device.

First claim

What is claimed is:

1. A system comprising:
processing circuitry of at least one of an external charging device or an implantable medical device (IMD) configured to be implanted in a patient, the processing circuitry configured to:
receive a signal sensed from the patient during charging of a rechargeable power source of the IMD;
determine, based on the signal sensed from the patient, a sleep state of the patient; and
adjust, based on the sleep state of the patient, charging of the rechargeable power source of the IMD.

2. The system of claim 1 ,
wherein to determine, based on the signal sensed from the patient, the sleep state of the patient, the processing circuitry is configured to determine that the patient is asleep, and
wherein to adjust, based on the sleep state of the patient, charging of the rechargeable power source of the IMD, the processing circuitry is configured to reduce a power level of the charging of the rechargeable power source of the IMD in response to determining that the patient is asleep.

3. The system of claim 1 ,
wherein to determine, based on the signal sensed from the patient, the sleep state of the patient, the processing circuitry is configured to determine that the patient is asleep, and
wherein to adjust, based on the sleep state of the patient, charging of the rechargeable power source of the IMD, the processing circuitry is configured to cease charging of the rechargeable power source of the IMD in response to determining that the patient is asleep.

4. The system of claim 1 , wherein to determine, based on the signal sensed from the patient, the sleep state of the patient, the processing circuitry is configured to:
determine, based on the signal sensed from the patient, an activity status of the patient; and
determine, based on the activity status of the patient, the sleep state of the patient.

5. The system of claim 1 , wherein to determine, based on the signal sensed from the patient, the sleep state of the patient, the processing circuitry is configured to:
determine, based on the signal sensed from the patient, a posture of the patient; and
determine, based on the posture of the patient, the sleep state of the patient.

6. The system of claim 1 , wherein to receive the signal sensed from the patient, the processing circuitry is configured to receive, from one or more sensors external to the patient, the signal sensed from the patient during charging of the rechargeable power source of the IMD.

7. The system of claim 1 , wherein to receive the signal sensed from the patient, the processing circuitry is configured to receive, from the IMD, the signal sensed from the patient during charging of the rechargeable power source of the IMD.

8. The system of claim 1 , wherein to receive the signal sensed from the patient, the processing circuitry is configured to receive, according to a wireless communication protocol, the signal sensed from the patient during charging of the rechargeable power source of the IMD.

9. The system of claim 1 , wherein the signal sensed from the patient during charging of the rechargeable power source of the IMD is representative of accelerometer data generated from activity of the patient during charging of the rechargeable power source of the IMD.

10. The system of claim 1 , wherein the signal sensed from the patient during charging of the rechargeable power source of the IMD is indicative of at least one of a heart rate or a respiration rate of the patient during charging of the rechargeable power source of the IMD.

11. The system of claim 1 , further comprising the external charging device, wherein the external charging device comprises comprising the processing circuitry.

12. The system of claim 1 , further comprising the IMD, wherein the IMD comprises the processing circuitry.

13. A system comprising:
an implantable medical device (IMD) configured to be implanted in a patient, the IMD comprising a rechargeable power source and first processing circuitry;
an external charging device configured to charge the rechargeable power source of the IMD, the external charging device comprising second processing circuitry, wherein
at least one of the first processing circuitry or the second processing circuitry is configured to:
receive a signal sensed from the patient during charging, by the external charging device, of the rechargeable power source of the IMD;
determine, based on the signal sensed from the patient, a sleep state of the patient; and
control, based on the sleep state of the patient, charging of the rechargeable power source of the IMD.

14. A method comprising:
receiving, by processing circuitry of at least one of an external charging device or an implantable medical device (IMD) implanted in a patient, a signal sensed from the patient during charging of a rechargeable power source of the IMD;
determining, by the processing circuitry and based on the signal sensed from the patient, a sleep state of the patient; and
adjusting, by the processing circuitry and based on the sleep state of the patient, charging of the rechargeable power source of the IMD.

15. The method of claim 14 ,
wherein determining, based on the signal sensed from the patient, the sleep state of the patient comprises determining that the patient is asleep, and
wherein adjusting, based on the sleep state of the patient, charging of the rechargeable power source of the IMD comprises reducing a power level of the charging of the rechargeable power source of the IMD in response to determining that the patient is asleep.

16. The method of claim 14 ,
wherein determining, based on the signal sensed from the patient, the sleep state of the patient comprises determining that the patient is asleep, and
wherein adjusting, based on the sleep state of the patient, charging of the rechargeable power source of the IMD comprises ceasing charging of the rechargeable power source of the IMD in response to determining that the patient is asleep.

17. The method of claim 14 , wherein determining, based on the signal sensed from the patient, the sleep state of the patient comprises:
determining, by the processing circuitry and based on the signal sensed from the patient, an activity status of the patient; and
determining, by the processing circuitry and based on the activity status of the patient, the sleep state of the patient.

18. The method of claim 14 , wherein determining, based on the signal sensed from the patient, the sleep state of the patient comprises:
determining, by the processing circuitry and based on the signal sensed from the patient, a posture of the patient; and
determining, by the processing circuitry and based on the posture of the patient, the sleep state of the patient.

19. The method of claim 14 , wherein receiving the signal sensed from the patient comprises receiving, from one or more sensors external to the patient, the signal sensed from the patient during charging of the rechargeable power source of the IMD.

20. The method of claim 14 , wherein receiving the signal sensed from the patient comprises receiving, from the IMD, the signal sensed from the patient during charging of the rechargeable power source of the IMD.

21. The method of claim 14 , wherein receiving the signal sensed from the patient comprises receiving, according to a wireless communication protocol, the signal sensed from the patient during charging of the rechargeable power source of the IMD.

22. The method of claim 14 , wherein t

Assignees

• Medtronic Inc

Inventors

• Gaddam Venkat R
• Bornhoft Reid K
• Olson David P
• Perz Leroy L
• Shongwe Mandla

Classifications

• A61N1/37223

  Circuits for electromagnetic coupling · CPC title

• A61N1/37252

  Details of algorithms or data aspects of communication system, e.g. handshaking, transmitting specific data or segmenting data · CPC title

• A61N1/3787 Primary

  from an external energy source · CPC title