Passive charge of implantable medical device utilizing external power source and method

• US 7,650,192 B2
• Filed: 04/28/2006
• Issued: 01/19/2010
• Est. Priority Date: 12/02/2005
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Wahlstrand, Carl D.
• Primary Examiner(s): Layno; Carl H
• Assistant Examiner(s): Gedeon; Brian T
• Application Number:
  US11/414,136
• Publication Number:
  US 20070129767A1
• Time in Patent Office: 1,362 Days
• Field of Search: 607/30, 607/31, 607/33, 607/60, 607/61
• US Class Current: 607/61
• CPC Class Codes: A61M 2205/3523 using telemetric means
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2205/8243 by induction
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 60/873 specially adapted for wireless or transcutaneous energy transfer [TET], e.g. inductive charging
• CPC Class Codes: A61N 1/3787 from an external energy source
• CPC Class Codes: H02J 2310/23 The load being a medical device, a medical implant, or a life supporting device
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

External power source for an implantable medical device implanted in a patient, the implantable medical device having a secondary coil operatively coupled to therapeutic componentry and method therefore. A modulation circuit is operatively coupled to a power source. A plurality of primary coils are operatively coupled to the modulation circuitry and physically associated with an article into which the patient may come into proximity. The modulation circuit drives at least one of the plurality of primary coils. A sensor is coupled to modulation circuit and is adapted to sense proximity of a component related to the implantable medical device. The modulation circuit commences operation to drive at least one of the plurality of primary coils when the sensor senses proximity with the component related to the implantable medical device.

Claims

1. An external power source for an implantable medical device implantable in a patient, said implantable medical device having a secondary coil operatively coupled to therapeutic componentry, comprising:

a power source;

a modulation circuit operatively coupled to said power source;

an article into which said patient may come into proximity;

a plurality of primary coils operatively coupled to said modulation circuit and physically associated with said article;

said modulation circuit driving at least one of said plurality of primary coils; and

a sensor coupled to said modulation circuit and adapted to sense proximity of a component related to said implantable medical device;

wherein said external power source automatically turns on and initiates a charging process without overt action by said patient;

wherein said modulation circuit automatically commences operation to drive at least one of said plurality of primary coils when said sensor senses proximity with said component related to said implantable medical device.

2. The external power source as in claim 1 wherein said sensor comprises a pressure sensor and said proximity is sensed through weight of said patient on said article.

3. The external power source as in claim 1 wherein said sensor comprises a temperature sensor and said proximity is sensed through heat of said patient in proximity to said article.

4. The external power source as in claim 1 wherein said sensor comprises a metal detector and said proximity is sensed through proximity to said implantable medical device.

5. The external power source as in claim 1 which further comprises a coil selection circuit operatively coupled to said plurality of primary coils and to said modulation circuit, said coil selection circuit determining which of said plurality of primary coils are in closest proximity to said secondary coil of said implantable medical device, said modulation circuit driving those of said plurality of primary coils selected by said coil selection circuit.

6. The external power source as in claim 1 wherein said article comprises an article with which said patient routinely comes into proximity.

7. The external power source as in claim 6 wherein said article comprises a piece of furniture routinely used by said patient.

8. The external power source as in claim 7 wherein said article comprises a component of bedding utilized by said patient.

9. The external power source as in claim 8 wherein said article comprises a component of bedding selected from a group consisting of a mattress, mattress pad, sheet, blanket and pillow.

10. The external power source as in claim 6 wherein said article comprises an article of clothing worn by said patient.

11. An external power source for an implantable medical device implantable in a patient, said implantable medical device having a secondary coil operatively coupled to therapeutic componentry, comprising:

a power source;

a modulation circuit operatively coupled to said power source;

an article into which said patient may come into proximity;

a plurality of primary coils operatively coupled to said modulation circuit and physically associated with said article;

said modulation circuit driving at least one of said plurality of primary coils; and

a sensor coupled to said modulation circuit and adapted to sense proximity of a component related to said implantable medical device;

wherein said external power source automatically turns on and initiates a charging process without overt action by said patient;

wherein said modulation circuit commences operation to drive at least one of said plurality of primary coils when said sensor senses proximity with said component related to said implantable medical device; and

wherein said modulation circuit ceases operation to drive at least one of said plurality of primary coils when said sensor ceases to sense proximity with said component related to said implantable medical device.

12. An external power source for an implantable medical device implantable in a patient, said implantable medical device having a secondary coil operatively coupled to therapeutic componentry, comprising:

a power source;

a modulation circuit operatively coupled to said power source;

an article into which said patient may come into proximity;

a plurality of primary coils operatively coupled to said modulation circuit and physically associated with said article;

said modulation circuit driving at least one of said plurality of primary coils; and

a sensor coupled to said modulation circuit and adapted to sense proximity of a component related to said implantable medical device;

wherein said external power source automatically turns on and initiates a charging process without overt action by said patient in response to sensing proximity of said component related to said implantable medical device;

wherein said modulation circuit commences operation to drive at least one of said plurality of primary coils when said sensor senses proximity with said component related to said implantable medical device; and

wherein said implantable medical device has a rechargeable power source operatively coupled to said therapeutic componentry wherein said external power source recharges said rechargeable power through said secondary coil when driven by at least one of said plurality of primary coils.

13. The external power source as in claim 12 wherein said rechargeable power source comprises a rechargeable battery.

14. A method of externally powering an implantable medical device implantable in a patient, said implantable medical device having a secondary coil operatively coupled to therapeutic componentry, comprising the steps of:

sensing proximity of a component related to said implantable medical device; and

turning on an external power source and initiating a charging process in response to said sensing step without overt action by said patient;

physically associating a plurality of primary coils operatively with an article into which said patient may come into proximity;

modulating at least one of said plurality of primary coils with said external power source;

automatically commencing operation to drive at least one of said plurality of primary coils when said sensing step senses proximity with said component related to said implantable medical device.

15. The method as in claim 14 further comprising the step of ceasing operation to drive at least one of said plurality of primary coils when said sensing step ceases to sense proximity with said component related to said implantable medical device.

16. The method as in claim 14 wherein said sensing step comprises detecting a pressure through weight of said patient on said article.

17. The method as in claim 14 wherein said sensing step comprises sensing heat of said patient in proximity to said article.

18. The method as in claim 14 wherein said sensing step comprises detecting metal through proximity to said implantable medical device.

19. The method as in claim 14 further comprising the step of determining which ones of said plurality of primary coils are in closest proximity to said secondary coil of said medical device and selectively modulating said ones of said plurality of primary coils.

20. The method as in claim 14 wherein said article comprises an article with which said patient routinely comes into proximity.

21. The method as in claim 20 wherein said article comprises a piece of furniture routinely used by said patient.

22. The method as in claim 21 wherein said article comprises a component of bedding utilized by said patient.

23. The method as in claim 22 wherein said article comprises a component of bedding selected from a group consisting of a mattress, mattress pad, sheet, blanket and pillow.

24. The method as in claim 20 wherein said article comprises an article of clothing worn by said patient.