Treatment and removal of objects in anatomical lumens

• US 6,740,096 B2
• Filed: 01/16/2002
• Issued: 05/25/2004
• Est. Priority Date: 01/16/2002
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Teague, James, Riley, James, Sloan, Todd
• Primary Examiner(s): Milano, Michael J.
• Assistant Examiner(s): Roberts, Paul A
• Application Number:
  US10/052,899
• Publication Number:
  US 20030135223A1
• Time in Patent Office: 860 Days
• Field of Search: 128/772, 604/282, 623/13.11, 623/13.12, 623/13.13, 623/13.14
• US Class Current: 606/127
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61B 2017/2215 having an open distal end

Abstract

A medical device can be used to entrain biological or foreign material during a medical procedure for the fragmentation of the material. The device also can be used to remove the material safely from the body. The device has a core element with a first portion extending substantially longitudinally and a second portion wound to form at least a helical coil in the shape of cone. A flat wire can substantially wrap the first and second portions of the core element, or a wire can substantially wrap the first portion and a sheath can substantially cover the second portion.

Claims

1. A medical device comprising:

a core element including a first portion extending substantially longitudinally and a second portion including at least one single loop and a helical coil, the helical coil tapering from a larger diameter at a proximal end thereof to a smaller diameter at a distal end thereof, wherein the at least one single loop is located at a distance from the proximal end of the helical coil that is substantially greater than a distance between wound sections of the helical coil; and

a flat wire substantially wrapping the first and second portions of the core element.

2. The medical device of claim 1 wherein the core element comprises a shape-memory material.

3. The medical device of claim 1 wherein a distal end of the flat wire is attached to the distal end of the helical coil.

4. The medical device of claim 1 wherein the flat wire comprises a square cross-section.

5. The medical device of claim 1 wherein the helical coil is adapted to ensnare objects in an anatomical lumen.

6. The medical device of claim 1 wherein the helical coil and the at least one single loop substantially deform upon being subjected to a force along a longitudinal axis of the core element.

7. The medical device of claim 6 wherein the helical coil and the at least one single loop substantially reform upon cessation of the force exerted along the longitudinal axis of the core element.

8. The medical device of claim 1 wherein a layer of a polymeric material substantially covers an outer surface of the flat wire.

9. The medical device of claim 1 wherein a layer of a polymeric material substantially covers a portion of the flat wire wrapping the helical coil and the at least one single loop.

10. The medical device of claim 1 further comprising a polymeric sheath substantially covering at least a portion of the flat wire, the polymeric sheath being composed of a heat shrink extrusion with a plurality of colors along a length thereof.

11. The medical device of claim 10 wherein the heat shrink extrusion and the plurality of colors along the length thereof are resistant to laser energy.

12. The medical device of claim 1 wherein the helical coil and the at least one single loop are reversibly transformed into a substantially linear configuration.

13. The medical device of claim 1 further comprising a catheter adapted to receive the core element and the flat wire therein.

14. The medical device of claim 13 wherein the helical coil assumes a substantially linear configuration when positioned within the catheter and expands back into a tapered configuration upon removal from the catheter.

15. The medical device of claim 1 wherein the at least one single loop is located a distance from the proximal end of the helical coil.

16. The medical device of claim 1 wherein the at least one single loop is a second helical coil located a distance from the proximal end of the helical coil.

17. A medical device comprising:

a core element including a first portion extending substantially longitudinally and a second portion including at least one single loop and a helical coil, the helical coil tapering from a larger diameter at a proximal end thereof to a smaller diameter at a distal end thereof, wherein the at least one single loop is located at a distance from the proximal end of the helical coil that is substantially greater than a distance between wound sections of the helical coil;

a wire element substantially wrapping the first portion of the core element; and

a sheath coupled to a distal end of the wire element and adapted to substantially cover the second portion of the core element.

18. The medical device of claim 17 wherein the core element comprises a shape-memory material.

19. The medical device of claim 17 wherein a distal end of the wire element is attached to the distal end of the helical coil.

20. The medical device of claim 17 wherein the wire element is a flat wire.

21. The medical device of claim 17 wherein the helical coil is adapted to ensnare objects in an anatomical lumen.

22. The medical device of claim 17 wherein the helical coil and the at least one single loop substantially deform upon being subjected to a force along a longitudinal axis of the core element.

23. The medical device of claim 22 wherein the helical coil and the at least one single loop substantially reform upon cessation of the force exerted along the longitudinal axis of the core element.

24. The medical device of claim 17 wherein the sheath is heat-shrinked about the second portion of the core element.

25. The medical device of claim 17 wherein the sheath comprises a polymeric material.

26. The medical device of claim 17 wherein the sheath comprises a heat shrink extrusion with a plurality of colors along a length thereof.

27. The medical device of claim 26 wherein the heat shrink extrusion and the plurality of colors along the length thereof are resistant to laser energy.

28. The medical device of claim 17 wherein the helical coil and the at least one single loop are reversibly transformed into a substantially linear configuration.

29. The medical device of claim 17 further comprising a catheter adapted to receive the core element, the wire element, and the sheath therein.

30. The medical device of claim 17 wherein the helical coil assumes a substantially linear configuration when positioned within the catheter and expands back into a tapered configuration upon removal from the catheter.

31. The medical device of claim 17 wherein the at least one single loop is located a distance from the proximal end of the helical coil.

32. The medical device of claim 17 wherein the at least one single loop is a second helical coil located a distance from the proximal end of the helical coil.