Implantable High Efficiency Energy Transfer Module With Near-Field Inductive Coupling

• US 20100280568A1
• Filed: 04/30/2010
• Published: 11/04/2010
• Est. Priority Date: 04/30/2009
• Status: Abandoned Application

• Current Assignee: Kenergy, Inc.
• Original Assignee: Kenergy, Inc.
• Inventors: Denker, Stephen, Bulkes, Cherik
• Application Number:
  US12/770,900
• Publication Number:
  US 20100280568A1
• Time in Patent Office: Days
• US Class Current: 607/33
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2250/0002 for data transfer
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/0507 Electrodes for the digestive system
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/057 Anchoring means; Means for fixing the head inside the heart
• CPC Class Codes: A61N 1/37217 characterised by the communication link, e.g. acoustic or tactile
• CPC Class Codes: A61N 1/37223 Circuits for electromagnetic coupling
• CPC Class Codes: A61N 1/37288 Communication to several implantable medical devices within one patient
• CPC Class Codes: A61N 1/3756 Casings with electrodes thereon, e.g. leadless stimulators
• CPC Class Codes: A61N 2001/0585 Coronary sinus electrodes

Abstract

An apparatus includes a medical device for implantation in a blood vessel and a power supply adapted to be located outside the blood vessel. The extravascular power supply has a power transmitter that produces a radio frequency signal which is applied to an energy transmitting antenna. The energy transmitting antenna comprises first and second coils connected is series and wound around separate spaced apart, parallel axes axis wherein magnetic fields generated by each coil add together to produce a cumulative field. The receiving antenna, for positioning in a near field region of the cumulative field, has least one coil wound around a third axis that is aligned with the cumulative field.

Claims

1. A medical apparatus comprising:

an extravascular power supply having a power transmitter that produces a first radio frequency signal, and an energy transmitting antenna to which the first radio frequency signal is applied and which is adapted for locating adjacent skin of an animal, the energy transmitting antenna comprising a first coil wound around a first axis and a second coil connected is series with the first coil and wound around a first axis, wherein the first and second axes are parallel and spaced apart so that B fields generated by each of the first coil and the second coil add together to produce a cumulative B field; and

a medical device adapted for implantation into a blood vessel of the animal and comprising a receiving antenna for positioning in a near field region of the cumulative B field and comprising at least one coil wound around a third axis that is aligned with the cumulative B field, the medical device having an electronic circuit coupled to the receiving antenna.

2. The medical apparatus as recited in claim 1 wherein the energy transmitting antenna and receiving antenna both resonate at a frequency of the first radio frequency signal.

3. The medical apparatus as recited in claim 1 wherein the energy transmitting antenna further comprises a substrate sheet with a major surface and the first coil and the second coil are located side by side on the major surface.

4. The medical apparatus as recited in claim 3 wherein the first coil has a first linear conductive section and the second coil has a second linear conductive section that is adjacent to the first linear conductive section.

5. The medical apparatus as recited in claim 4 wherein the first linear conductive section is parallel to the second linear conductive section.

6. The medical apparatus as recited in claim 1 wherein the first coil and the second coil are rectangular.

7. The medical apparatus as recited in claim 1 wherein the first coil and the second coil are substantially flat and coplanar.

8. The medical apparatus as recited in claim 1 wherein the receiving antenna comprises a helical coil.

9. The medical apparatus as recited in claim 1 wherein the receiving antenna comprises a double helical coil.

10. The medical apparatus as recited in claim 1 wherein the receiving antenna comprises a saddle coil.

11. The medical apparatus as recited in claim 1 wherein the receiving antenna comprises a cylindrical birdcage coil.

12. A medical apparatus comprising:

an extravascular power supply having a power transmitter that produces a first radio frequency signal, and an energy transmitting antenna coupled to the power transmitter for receiving the first radio frequency signal and adapted for locating adjacent skin of an animal, the energy transmitting antenna comprising a first coil and a second coil connected is series and located coplanar side by side so that B fields generated by each of the first coil and the second coil additively combine to produce a cumulative B field; and

a medical device adapted for implantation into a blood vessel of the animal and comprising a receiving antenna for positioning in a near field region of the cumulative B field and comprising at least one coil wound around a third axis that is aligned with the cumulative B field, the medical device having an electronic circuit coupled to the receiving antenna.

13. The medical apparatus as recited in claim 12 wherein the energy transmitting antenna and receiving antenna both resonate at a frequency of the first radio frequency signal.

14. The medical apparatus as recited in claim 12 wherein the first coil has a first linear conductive section and the second coil has a second linear conductive section that is adjacent to the first linear conductive section.

15. The medical apparatus as recited in claim 14 wherein the first linear conductive section is parallel to the second linear conductive section.

16. The medical apparatus as recited in claim 12 wherein the first coil and the second coil are rectangular.

17. The medical apparatus as recited in claim 12 wherein the first coil and the second coil are substantially flat and coplanar.

18. The medical apparatus as recited in claim 12 wherein the receiving antenna comprises a helical coil.

19. The medical apparatus as recited in claim 12 wherein the receiving antenna comprises a double helical coil.

20. The medical apparatus as recited in claim 12 wherein the receiving antenna comprises a saddle coil.

21. The medical apparatus as recited in claim 12 wherein the receiving antenna comprises a cylindrical birdcage coil.