Implantable therapy delivery element adjustable anchor

• US 6,901,287 B2
• Filed: 04/26/2001
• Issued: 05/31/2005
• Est. Priority Date: 02/09/2001
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Davis, Scott J., Tronnes, Carole Anne, Schmelzer, Thomas Delmar, Swoyer, John Matthew, Carlton, Keith Richard, Gerber, Martin Theodore
• Primary Examiner(s): Schaetzle, Kennedy
• Assistant Examiner(s): Mullen, Kristen
• Application Number:
  US09/843,638
• Publication Number:
  US 20020111659A1
• Time in Patent Office: 1,496 Days
• Field of Search: 128/898, 128/DIG.40, 607/2, 607115-117, 607/126, 607/129, 607/130, 607/131, 607/132, 600372-375, 600/377, 604174-175, 606/151, 606/157, 606/158
• US Class Current: 607/2
• CPC Class Codes: A61N 1/0558 Anchoring or fixation means therefor

Abstract

An implantable therapy delivery system has a therapy delivery element that is inserted or implanted into a human body and anchored or fixed to tissue to delivery a therapy to a patient. In one embodiment an implantable neurostimulator uses an electrical stimulation lead to delivery a therapy such as sacral nerve stimulation, peripheral nerve stimulation, and the like. In another embodiment the implantable therapeutic substance delivery device, also known as a drug pump, is connected to a catheter to deliver a therapy to treat conditions such as spasticity, cancer, pain, and the like. The therapy delivery element is anchored to tissue using an adjustable anchor having a therapy grip element, at least two extension elements connected to the therapy grip element, and a tissue fixation element connected to the extension elements. The extensions project substantially perpendicular in relation to the therapy delivery element and are configured to actuate the therapy grip element to an opened position and a closed position. A tissue fixation element is connected to the extensions and configured for fixation to a tissue location from an axial direction to the therapy delivery element. The adjustable anchor facilitates minimally invasive procedures, facilitates securing the therapy delivery element in the same plane as the therapy delivery element was inserted, facilitates rapid placement to reduce procedure time, and provides a wide range of other benefits. The adjustable anchor and its methods of operation have many embodiments.

Claims

1. A method for operating an adjustable anchor for a therapy delivery element, comprising:

providing a therapy grip element having a length defined by the boundaries of a first and second opening;

separating a first portion of the therapy grip element from a second portion of the therapy grip element to form a discontinuous inner surface extending the length of the therapy grip element by actuating two extension elements to open the therapy grip element;

placing the therapy element within the inner surface of the therapy grip element;

positioning the therapy grip element at a grip location on the therapy delivery element;

closing the therapy grip element on the therapy delivery element by actuating the two extension elements such that the inner surface of the grip element grippably engages the therapy delivery element;

securing the therapy grip element on the therapy delivery element when the therapy grip element is closed;

positioning a tissue fixation element at a tissue location;

fixing the tissue fixation element to tissue at the tissue location in an orientation along the axial length of the therapy delivery element.

2. The method as in claim 1 further comprising sensing therapy grip element location on the therapy delivery element while positioning the therapy grip element at the grip location on the therapy delivery element.

3. The method as in claim 1 wherein the tissue location is near where the therapy delivery element enters the human body on subcutaneous tissue.

4. The method as in claim 1 wherein the two extension elements are actuated with a single pincer motion.

32. The implantable therapy delivery system as in claim 1 wherein the tissue location is near where the therapy delivery element enters the human body on subcutaneous tissue.

33. The implantable therapy delivery system as in claim 1 wherein the two extension elements are actuated with a single pincer motion.

34. The implantable therapy delivery system as in claim 1 wherein the therapy delivery element is an electrical lead.

35. The implantable therapy delivery system as in claim 1 wherein the therapy delivery element is a catheter.

36. The implantable therapy delivery system as in claim 1 wherein the implantable therapy delivery device is a neurostimulator.

37. The implantable therapy delivery system as in claim 1 wherein the implantable therapy delivery device is a therapeutic substance delivery device.

38. The implantable therapy delivery system as in claim 1 wherein the therapy delivery system performs the therapy of sacral nerve stimulation therapy.

39. The implantable therapy delivery system as in claim 1 wherein the therapy delivery system performs the therapy of peripheral nerve stimulation.

5. A method for anchoring a therapy delivery element, comprising:

inserting a therapy delivery element into a human body;

providing a therapy grip element having a length defined by the boundaries of a first and second opening;

separating a first portion of the therapy grip element from a second portion of the therapy grip element to form a discontinuous inner surface extending the length of the therapy grip element by actuating two extension elements to open the therapy grip element;

placing the therapy element within the inner surface of the therapy grip element;

positioning the therapy grip element at a grip location on the therapy delivery element;

closing the therapy grip element on the therapy delivery element by actuating the two extension elements such that the inner surface of the grip element grippably engages the therapy delivery element;

securing the therapy grip element on the therapy delivery element when the therapy grip element is closed;

positioning a tissue fixation element at a tissue location;

fixing the tissue fixation element to tissue at the tissue location in an orientation along the axial length of the therapy delivery element; and

,

connecting the therapy delivery element to a therapy delivery device.

6. The method as in claim 5 further comprising sensing therapy grip element location on the therapy delivery element while positioning the therapy grip element at the grip location on the therapy delivery element.

7. The method as in claim 5 wherein the tissue location is near where the therapy delivery element enters the human body on subcutaneous tissue.

8. The method as in claim 5 wherein the two extension elements are actuated with a single pincer motion.

9. The method as in claim 5 wherein the therapy delivery device is a neurostimulator.

10. The method as in claim 5 wherein the therapy delivery device is a therapeutic substance delivery device.

11. The method as in claim 5 wherein the therapy delivery element is a stimulation lead.

12. The method as in claim 5 wherein the therapy delivery element is a catheter.

13. An adjustable anchor for a therapy delivery element, comprising:

a therapy grip element configured to be actuated to at least one of an open position or a closed position, the therapy grip element comprising a first portion and a second portion and having a length defined by the boundaries of a first and second opening, wherein in the open position the grip element comprises a discontinuous inner surface extending the length of the grip element and the first portion is separated from the second portion by a first distance, and wherein in the closed position the first portion is separated from the second portion by a second distance less than the first distance and the inner surface is configured to grippingly engage the therapy delivery element,

at least two extension elements connected to the therapy grip element, the extension element configured to extend substantially perpendicular from a therapy delivery element and the extension elements being configured to actuate the therapy grip element; and

,

a tissue fixation element connected to the extension elements, the tissue fixation element configured to be fixed to a tissue location from an axial direction to the therapy delivery element.

14. The implantable therapy delivery system as in claim 13 wherein the tissue location is near where the therapy delivery element enters the human body on subcutaneous tissue.

15. The implantable therapy delivery system as in claim 13 wherein the two extension elements are actuated with a single pincer motion.

16. The implantable therapy delivery system as in claim 13 wherein the therapy grip element has a substantially rigid grip surface.

17. The implantable therapy delivery system as in claim 13 wherein the therapy grip element is configured in a normally closed position.

18. The implantable therapy delivery element as in claim 13 wherein the therapy grip element covers at least about 25 degrees of the therapy delivery element.

19. The implantable therapy delivery element as in claim 13 wherein the therapy grip element covers at least about 270 degrees of the therapy delivery element.

20. The implantable therapy delivery element as in claim 13 wherein the therapy grip element covers more than about 360 degrees of the therapy delivery element.

21. The implantable therapy delivery element as in claim 13 wherein the therapy grip element has at least two friction pads that engage the therapy delivery element at substantially opposing angles.

22. The implantable therapy delivery element as in claim 21 further comprising release tabs to unlock the therapy grip element before the therapy grip element is actuated from the a closed position to an open position.

23. The implantable therapy delivery element as in claim 13 wherein the therapy grip element further comprises a biasing element.

24. The implantable therapy delivery element as in claim 13 wherein the therapy grip element has a grip stop surface that engages a complimentary extension stop surface to prevent the extension element from actuating the therapy grip element beyond a desired actuation limit.

25. The implantable therapy delivery element as in claim 13 wherein the extension element is positioned at less than about 180 degrees in relation to the therapy delivery element.

26. The implantable therapy delivery element as in claim 13 wherein the extension element is positioned at about 180 degrees in relation to the therapy delivery element.

27. The implantable therapy delivery element as in claim 13 wherein the tissue fixation element has a fixation configuration selected from the group consisting of a suture, a staple, and a screw.

28. The implantable therapy delivery element as in claim 13 wherein the tissue fixation element is configured at a predetermined position in relation to the extension element.

29. The implantable therapy delivery element as in claim 13 wherein the therapy delivery element has at least one anchor position reference.

30. The implantable therapy delivery element as in claim 29 wherein the anchor position reference is selected from the group consisting of a visual reference, a tactile reference, an indentation, and a protrusion.

31. An implantable therapy delivery system having an adjustable anchor, comprising:

an implantable therapy delivery device;

at least one therapy delivery element coupled to the implantable therapy delivery device;

an adjustable anchor coupleable to the therapy delivery element, the adjustable anchor being implantable and including,

a therapy grip element configured to be actuated to at least one of an open position or a closed position, the therapy grip element comprising a first portion and a second portion and having a length defined by the boundaries of a first and second opening, wherein in the open position the grip element comprises a discontinuous inner surface extending the length of the grip element and the first portion is separated from the second portion by a first distance, and wherein in the closed position the first portion is separated from the second portion by a second distance less than the first distance and the inner surface is configured to grippingly engage the therapy delivery element,

at least two extension elements connected to the therapy grip element, the extension element extending substantially perpendicular from the therapy delivery element, and the extension elements being configured to actuate the therapy grip element; and

,

a tissue fixation element connected to the extension elements, the tissue fixation element configured to be fixed to a tissue location from an axial direction to the therapy delivery element.