WO2003039657B1 - Electrical tissue stimulation apparatus and method - Google Patents

Electrical tissue stimulation apparatus and method

Info

Publication number
WO2003039657B1
WO2003039657B1 PCT/US2002/006457 US0206457W WO03039657B1 WO 2003039657 B1 WO2003039657 B1 WO 2003039657B1 US 0206457 W US0206457 W US 0206457W WO 03039657 B1 WO03039657 B1 WO 03039657B1
Authority
WO
WIPO (PCT)
Prior art keywords
cancelled
extendable member
lead
lead body
distal portion
Prior art date
Application number
PCT/US2002/006457
Other languages
French (fr)
Other versions
WO2003039657A1 (en
Inventor
Gary W King
Original Assignee
Medtronic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Medtronic Inc filed Critical Medtronic Inc
Priority to CA002459603A priority Critical patent/CA2459603A1/en
Priority to AT02709759T priority patent/ATE292492T1/en
Priority to EP02709759A priority patent/EP1444003B1/en
Priority to DE60203641T priority patent/DE60203641T2/en
Publication of WO2003039657A1 publication Critical patent/WO2003039657A1/en
Publication of WO2003039657B1 publication Critical patent/WO2003039657B1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/02—Details
    • A61N1/04—Electrodes
    • A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
    • A61N1/056—Transvascular endocardial electrode systems

Abstract

An implantable lead for electrical stimulation of tissue has wire-like extendable members whose tips curl back upon themselves in open tissue spaces to form 2- or 3-dimensional electrodes. The electrodes may be positioned axially or in other directions from the lead body. Traction on the lead body or extendable members allows easy withdrawal as the member tip electrodes uncurl, allowing removal without major surgery. This apparatus and method is useful for minimally invasive insertion of electrodes or electrode arrays, especially through a narrow body lumen or Tuohy needle, providing therapeutic stimulation of nervous tissue, muscle or organs.

Claims

30
AMENDED CLAIMS
[received by the International Bureau on 22 April 2003 (22.04.03); original claims 1 has been amended, original claim 2 has been cancelled, original claims 3-28 have been amended and renumbered as claims 2-27; original claims 29-47 have been cancelled]
1. An implantable lead (16) for stimulation of nerve tissue, muscle or organs, the lead comprising: an elongate lead body having an axis and a tip (14); and at least one extendable member (32) having a distal portion adapted to curl upon itself when not-constrained and a proximal portion, the extendable member received at least in part within the lead body for axial movement between: a retracted position in which the distal and proximal portions are constrained within the lead body; and an extended position in which the proximal portion is retained within the lead body and the distal portion is deployed out the tip of the lead body such that the distal portion tightly curls upon itself to form a compact conductive electrode (33).
2. The implantable lead of claim 1 in which the extendable member further comprises an intermediate portion between the distal and proximal portions.
3. The implantable lead of claim 2 in which the intermediate portion is deployed out of the lead body when the extendable member is in the extended position.
4. The implantable lead of claim 2 or 3 in which the intermediate portion comprises an insulated wire allowing current to flow between the proximal portion and the distal portion.
5. The implantable lead of claim 3 or 4 wherein the intermediate portion is adapted to curl as it is deployed out the tip of the lead body less tightly than the distal portion curls upon itself.
6. The implantable lead of any of claims 1-5 in which the distal portion is formed such that it tends to curl upon itself in two dimensions in the extended position. 31
7. The implantable lead of any of claims 1-5 in which the distal portion is formed such that it tends to curl upon itself in three dimensions in the extended position.
8. The implantable lead according to any of claims 1-7, wherein the extendable member comprises wire, and the distal portion comprises one or more external coiled conductors.
9. The implantable lead according to claim 8, wherein the one or more external coiled conductors comprises a plurality of external coiled conductors having dissimilar properties.
10. The implantable lead according to any of claims 1-9, wherein the distal portion of the extendable member has preset elastic properties that tend to cause the distal portion to curl into an electrode.
11. The implantable lead according to any of claims 1-10, wherein the distal portion of the extendable member is formed of bimetallic metals or nitinol material that change shape due to temperature changes.
12. The implantable lead according to any of claims 1-11, wherein the distal portion of the extendable member will uncurl if the extendable member is retracted into the lead body.
13. The implantable lead according to any of claims 1-12, wherein the distal portion of the extendable member is sufficiently flexible that the distal portion will uncurl if the entire lead body is pulled through tissue, thereby reducing trauma to the tissue if excessive forces are applied to the lead.
14. The implantable lead according to any of claims 1-13, wherein the extendable member has a preset curve so that as it is extended axially beyond the lead body, it will move also in directions laterally to the axis of the lead body.
15. The implantable lead according to claim 14, wherein the extendable member has a preset curve over the distal portion.
16. The implantable lead according to claim 14 or 15, wherein the extendable member has an elasticity that allows it to be held straight by the lead body but allows the extendable member to resume its preset curve when it is extended beyond the tip of the lead body.
17. The implantable lead according to any of claims 14-16, wherein the extendable member has a preset curvature such that, when deployed out of the lead body, the extendable member moves in axial directions and lateral directions.
18. The implantable lead according to any of claims 14-17, wherein the extendable member has a preset curve so that as it is extended beyond the lead body, it will move also in directions perpendicular to the axis of the lead body.
19. The implantable lead according to any of claims 1-18, wherein the extendable member is held by the lead body against rotation relative to the lead body.
20. The implantable lead according to claim 19 in which the extendable member has an asymmetric cross section along at least a portion of the proximal portion thereof, the lead body having a channel receiving at least the proximal portion, the channel having an asymmetric cross section that engages the asymmetric cross section of the extendable member to hold the extendable member against rotation relative to the lead body.
21. The implantable lead according to any of claims 1-20, wherein the extendable member comprises a plurality of extendable members, each of which can be independently extended to deploy a distal portion beyond the tip of the lead body.
22. The implantable lead according to any of claims 1-21, wherein the lead body has a diameter, and the electrode formed by curling of the distal portion has a 2- or 3-dimensional shape in which one or more of the dimensions is larger than the diameter of the lead body. 33
23. The implantable lead according to any of claims 1-22, wherein the lead body has a central portion movable axially within the lead body to move the at least one extendable member between the retracted and extended positions.
24. The implantable lead according to any of claims 1-23, in which the extendable member comprises a plurality of extendable members, wherein the distal portions of the extendable members can be selectively deployed such that the electrodes fit a surface of tissue or achieve a desired distribution of current.
25. The implantable lead according to any of claims 1-24, wherein the distal tip of the extendable member has a material coating adapted to keep the distal tip straight after deployment past the tip of the lead body, wherein the material will dissolve over time inside the body.
26. The implantable lead of claim 25, wherein the material coating will dissolve by application of electrical current through the distal portion of the extendable members.
27. The implantable lead according to any of claims 1-26, wherein the extendable member is small enough to pass through a small body lumen, the distal portion being adapted to be advanced through the small body lumen and to curl into an electrode after being advanced through the small body lumen.
29. CANCELLED
30. CANCELLED
31. CANCELLED
32. CANCELLED
33. CANCELLED 34
34. CANCELLED
35. CANCELLED
36. CANCELLED
37. CANCELLED
38. CANCELLED
39. CANCELLED
40. CANCELLED
41. CANCELLED
42. CANCELLED
43. CANCELLED
44. CANCELLED
45. CANCELLED
46. CANCELLED
47. CANCELLED
PCT/US2002/006457 2001-11-07 2002-02-21 Electrical tissue stimulation apparatus and method WO2003039657A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002459603A CA2459603A1 (en) 2001-11-07 2002-02-21 Electrical tissue stimulation apparatus and method
AT02709759T ATE292492T1 (en) 2001-11-07 2002-02-21 METHOD AND DEVICE FOR ELECTRICALLY STIMULATING TISSUE
EP02709759A EP1444003B1 (en) 2001-11-07 2002-02-21 Electrical tissue stimulation apparatus
DE60203641T DE60203641T2 (en) 2001-11-07 2002-02-21 METHOD AND DEVICE FOR THE ELECTRICAL STIMULATION OF TISSUE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/007,508 US6745079B2 (en) 2001-11-07 2001-11-07 Electrical tissue stimulation apparatus and method
US10/007,508 2001-11-07

Publications (2)

Publication Number Publication Date
WO2003039657A1 WO2003039657A1 (en) 2003-05-15
WO2003039657B1 true WO2003039657B1 (en) 2003-06-26

Family

ID=21726605

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/006457 WO2003039657A1 (en) 2001-11-07 2002-02-21 Electrical tissue stimulation apparatus and method

Country Status (6)

Country Link
US (2) US6745079B2 (en)
EP (1) EP1444003B1 (en)
AT (1) ATE292492T1 (en)
CA (1) CA2459603A1 (en)
DE (1) DE60203641T2 (en)
WO (1) WO2003039657A1 (en)

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