Process and device for supply of an at least partially implanted active device with electric power

• US 6,131,581 A
• Filed: 06/14/1999
• Issued: 10/17/2000
• Est. Priority Date: 06/23/1998
• Status: Expired due to Term

• Current Assignee: Cochlear Limited
• Original Assignee: Dr.-Ing. Hans Leysieffer
• Inventors: Muller, Gerd M., Leysieffer, Hans
• Primary Examiner(s): Hindenburg, Max
• Assistant Examiner(s): SZMAL, BRIAN SCOTT
• Application Number:
  US09/332,605
• Time in Patent Office: 491 Days
• Field of Search: 128/899, 600/25, 607/33, 607/34, 607/35, 607/1
• US Class Current: 128/899
• CPC Class Codes: A61N 1/36038 Cochlear stimulation
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: H04R 2225/31 Aspects of the use of accumulators in hearing aids, e.g. rechargeable batteries or fuel cells
• CPC Class Codes: H04R 2225/67 Implantable hearing aids or parts thereof not covered by H04R25/606
• CPC Class Codes: H04R 25/00 Deaf-aid sets , i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception electrical stimulation of auditory nerves to promote the auditory function A61N1/36038; optical stimulation of auditory nerves to promote the auditory function A61N5/0622
• CPC Class Codes: H04R 25/602 of batteries
• CPC Class Codes: H10N 10/00 Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects integrated devices or assemblies of multiple devices H10N19/00
• CPC Class Codes: H10N 10/17 characterised by the structure or configuration of the cell or thermocouple forming the device

Abstract

An improved implantable thermoelectric energy converter for converting thermal energy generated by an implant wearer into electrical power for supplying electric power to an at least partially implanted active device, the implantable thermoelectric energy converter including a hot pole, a cold pole, and a plurality of individual modules electrically coupled to one another disposed between the hot pole and the cold pole. In particular, the hot pole thermally couples one end of the plurality of individual modules to an implantation site having a temperature substantially that of a core body temperature and the cold pole thermally couples another end of the plurality of individual modules to an implantation site closer to an outer skin surface of the implant wearer. In another embodiment, the implantable thermoelectric energy converter may also include an implantable energy storage for collecting and temporarily storing the electric power generated. In accordance with still another embodiment of the present invention, the cold pole of the implantable thermoelectric energy converter may form a cooling body having an enlarged surface area which is adapted to be positioned directly under a skin surface of the implant wearer. In yet another embodiment, the implantable thermoelectric energy converter may be implanted in the skull or neck area of the implant wearer'"'"'s body.

Claims

1. Process for supplying electric power generated by an implanted thermoelectric power converter to an at least partially implanted active device comprising the steps of:

positioning a hot pole of said thermoelectric power converter in an area of an implant wearer'"'"'s body in a manner that said hot pole is maintained at substantially the core temperature of the wearer'"'"'s body; and

positioning a cold pole of said thermoelectric power converter in an area of a implant wearer'"'"'s body proximal to an outer skin surface in a manner that said cold pole is maintained at a substantially outer skin temperature of the wearer'"'"'s body.

2. Process of claim 1, further comprising the step of collecting and temporarily storing electric power generated by the energy converter in an implanted energy storage until the electric power is needed by said at least partially implanted active device.

3. Process for supplying electric power generated by an implanted thermoelectric power converter to an at least partially implanted active device comprising the steps of:

positioning a hot pole of said thermoelectric power converter in at least one of an implant wearer'"'"'s skull and the implant wearer'"'"'s neck in a manner that said hot pole is maintained at substantially at the core temperature of the wearer'"'"'s body; and

positioning a cold pole of said thermoelectric power converter in an area of a implant wearer'"'"'s body proximal to an outer skin surface of at least one of the implant wearer'"'"'s skull and the implant wearer'"'"'s neck in a manner that said cold pole is maintained at a substantially outer skin temperature of the wearer'"'"'s body.

4. Process of claim 3, further comprising the step of positioning said hot pole proximate to a large blood vessel in a manner to transfer heat from the large blood vessel to the hot pole.

5. Process of claim 4, further comprising the step of positioning said hot pole proximate to the implant wearer'"'"'s sigmoid sinus and positioning said cold pole in the implant wearer'"'"'s mastoid region proximate to the outer skin of said region.

6. Process of claim 3, further comprising the step of collecting and temporarily storing electric power generated by the energy converter in an implanted energy storage until the electric power is needed by said at least partially implanted active device.

7. Process of claim 6, further comprising the step of controlling the collection and temporary storage of electric power using an implantable control unit.

8. Process of claim 7, further comprising the step of programming said implantable control unit through one of an unidirectional and a bidirectional transcutaneous data link from outside of the implant wearer'"'"'s body.

9. An implantable thermoelectric energy converter for converting thermal energy generated by an implant wearer into electrical power for supplying electric power to an at least partially implanted active device, said implantable thermoelectric energy converter comprising:

a hot pole;

a cold pole; and

a plurality of individual modules which are electrically coupled to one another and are disposed between said hot pole and said cold pole;

wherein said hot pole is adapted to thermally couple one end of said plurality of individual modules to an implantation site having a temperature substantially that of a core body temperature and said cold pole is adapted to thermally couple another end of said plurality of individual modules to an implantation site which is closer to an outer skin surface of the implant wearer when said thermoelectric energy converter is implanted.

10. An implantable thermoelectric energy converter of claim 9, further comprising an implantable energy storage for collecting and temporarily storing electric power generated.

11. An implantable thermoelectric energy converter of claim 9, wherein said cold pole forms a cooling body having an enlarged surface area, said cooling body being adapted to be positioned directly under a skin surface of the implant wearer.

12. An implantable thermoelectric energy converter of claim 9, wherein said cold pole is thermally coupled to a cooling body having a large surface area, said cooling body being adapted to be positioned under a skin surface of the implant wearer.

13. An implantable thermoelectric energy converter for converting thermal energy generated by an implant wearer into electrical power for supplying electric power to an at least partially implanted active device, said implantable thermoelectric energy converter comprising:

a hot pole;

a cold pole; and

a plurality of individual modules which are electrically coupled to one another and are disposed between said hot pole and said cold pole;

wherein said hot pole is adapted to thermally couple one end of said plurality of individual modules to an implantation site located in at least one of the implant wearer'"'"'s skull and the implant wearer'"'"'s neck having a temperature substantially that of a core body temperature and said cold pole is adapted to thermally couple another end of said plurality of individual modules to an implantation site in at least one of the implant wearer'"'"'s skull and the implant wearer'"'"'s neck closer to an outer body surface of the implant wearer.

14. An implantable thermoelectric energy converter of claim 13, wherein said hot pole is adapted to thermally couple one end of said plurality of individual modules to a blood vessel in at least one of the implant wearer'"'"'s skull and the implant wearer'"'"'s neck when said thermoelectric energy converter is implanted.

15. An implantable thermoelectric energy converter of claim 14, wherein said hot pole is adapted to thermally couple one end of said plurality of individual modules to a sigmoid sinus of the implant wearer and said cold pole is adapted to thermally couple another end of said plurality of individual modules closer to the outer body surface at a mastoid region of the implant wearer.

16. An implantable thermoelectric energy converter of claim 13, further comprising an implantable energy storage for collecting and temporarily storing electric power generated.

17. An implantable thermoelectric energy converter of claim 16, further comprising an implantable control unit for controlling at least one of said energy storage and relay of electrical power to said active implant.

18. An implantable thermoelectric energy converter of claim 17, wherein said implantable control unit includes at least one of a microprocessor and a microcontroller.

19. An implantable thermoelectric energy converter of claim 17, further comprising an external control and programming module for at least one of controlling and programming said implantable control unit through a transcutaneous data link from outside the implant wearer'"'"'s body.

20. An implantable thermoelectric energy converter of claim 13, wherein each of said plurality of individual module includes legs of different electrical conductivity, one end of each of said two legs being connected to said cold pole, and another end of each of said legs being connected to said hot pole.

21. An implantable thermoelectric energy converter of claim 20, wherein said legs comprises at least one of an n-doped semiconductor material and a p-doped semiconductor material.

22. An implantable thermoelectric energy converter of claim 20, wherein said legs have different metals which are spaced far apart in thermoelectric series.

23. An implantable thermoelectric energy converter of claim 13, wherein said cold pole and said hot pole are formed of a biocompatible material having thermally conductive property.

24. An implantable thermoelectric energy converter of claim 23, wherein said biocompatible material is selected from a group consisting of titanium, titanium alloys, niobium, niobium alloys, tantalum, tantalum alloys, steels and aluminum oxide ceramic.

25. An implantable thermoelectric energy converter of claim 13, wherein said plurality of individual modules are mechanically interconnected by a thermally insulating composite element made of a biocompatible material, said thermally insulating composite element being located between said cold pole and said hot pole.

26. An implantable thermoelectric energy converter of claim 25, wherein said biocompatible material for said thermally insulating composite element is selected from a group consisting of polytetrafluorethylene, polycarbonates, polyurethane, silicones, and carbon fiber-reinforced polymers.

27. An implantable thermoelectric energy converter of claim 25, wherein said thermally insulating composite element fills intermediate spaces in the form of casting material between said plurality of individual modules, said cold pole and said hot pole.

28. An implantable thermoelectric energy converter of claim 13, further comprising a plurality of module groups, each of said plurality of module groups being electrically connected in parallel to one another and including a plurality of individual modules electrically connected in series to one another.

29. An implantable thermoelectric energy converter of claim 13, wherein said cold pole forms a cooling body adapted to be implanted directly under the implant wearer'"'"'s skin.

30. An implantable thermoelectric energy converter of claim 13, wherein said cold pole is coupled to a cooling body having an enlarged surface area, said cooling body being adapted to be positioned directly under a skin surface of the implant wearer.

31. An implantable thermoelectric energy converter of claim 13, wherein said implantable thermoelectric energy converter is substantially planar in shape.

32. An implantable thermoelectric energy converter of claim 31, wherein said implantable thermoelectric energy converter is substantially arched in shape to generally correspond to an arched shape of a human skull.