Vessel occluding material extractor

• US 20040204738A1
• Filed: 04/10/2003
• Published: 10/14/2004
• Est. Priority Date: 04/10/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Weber, Jan, Spencer, Steven M.
• Granted Patent: US 8,070,761 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• 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 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting

Abstract

Methods, devices, and systems for extracting vessel occluding material are provided. An embodiment of a vessel occluding material extractor includes a host structure, a plurality of expandable members, a slide mechanism, and a circumferential member. The host structure has an elongate axis. The expandable members are connected to the host structure arrayed radially around the elongate axis. The slide mechanism is connected to the expandable members and adjacent the host structure, and is slidable in the direction of the elongate axis. The circumferential member is connected to the expandable members between the connection of the slide mechanism and the host structure to the expandable members.

Claims

1. An extractor comprising;

a host structure having an elongate axis;

a plurality of expandable members connected to the host structure arrayed radially around the elongate axis;

a slide mechanism, connected to the expandable members and adjacent the host structure, and slidable in the direction of the elongate axis; and

a circumferential member connected to the expandable members between the connection of the slide mechanism and the host structure.

2. The extractor of claim 1, wherein the plurality of expandable members includes filtering material spanning between at least two adjacent expandable members.

3. The extractor of claim 1, wherein the plurality of expandable members includes one or more elongate metal members.

4. The extractor of claim 1, wherein the plurality of expandable members includes one or more elongate polymer members.

5. The extractor of claim 1, wherein the circumferential member is operable to provide generally uniform radial spacing of the plurality of expandable members.

6. The extractor of claim 1, wherein the circumferential member is connected to the expandable members mid way between the connection of the slide mechanism and the host structure to the expandable members.

7. An extractor comprising;

a host structure having an elongate axis;

a plurality of expandable members, connected to the host structure, having an unexpanded state and an expanded state, and when in their expanded state, are operable to filter vessel occluding material;

a slide mechanism, connected to the expandable members and adjacent the host structure, and slidable in the direction of the elongate axis; and

a circumferential member connected to the expandable members between the connection of the slide mechanism and the host structure to the expandable members.

8. The extractor of claim 7, wherein the extractor includes a stop structure operable to stop the slidable movement of the slide mechanism in one direction.

9. The extractor of claim 8, wherein the stop structure includes a stop structure formed on the host structure.

10. The extractor of claim 8, wherein the stop structure includes a first stop structure connected to the host structure.

11. The extractor of claim 8, wherein the stop structure includes a first stop structure operable to stop the slidable movement of the slide mechanism in a first direction.

12. The extractor of claim 11, wherein the stop structure includes a second stop structure operable to stop the slidable movement of the slide mechanism in a second direction.

13. The extractor of claim 12, wherein the stop structure includes a recessed section, formed in an exterior surface of the host structure, the recessed section having a first end acting as the first stop structure and a second end acting as the second stop structure.

14. A vessel occluding material extractor, comprising;

a host structure having an elongate axis;

a plurality of expandable members connected to the host structure;

means for expanding the plurality of expandable members, connected to the expandable members and adjacent the host structure; and

a circumferential member connected to the expandable members between the connection of the slide mechanism and the host structure to the expandable members.

15. The extractor of claim 14, wherein a circumferential member connected to the expandable members includes one or more reservoirs connected thereto for housing a drug therein.

16. The extractor of claim 15, wherein the plurality of expandable members includes at least one expandable member having a hollow lumen formed therein and wherein the hollow lumen is connected to one or more of the reservoirs.

17. The extractor of claim 14, wherein means for expanding the expandable members includes a slide mechanism slidable in the direction of the elongate axis.

18. The extractor of claim 17, wherein the extractor includes means for arresting directional movement of the slide mechanism.

19. The extractor of claim 17, wherein the host structure has an exterior surface and wherein the means for arresting directional movement of the slide mechanism includes means for arresting directional movement of the slide mechanism that are external to the exterior surface of the host.

20. The extractor of claim 17, wherein the host structure includes an recessed section in which the slide mechanism slides.

21. The extractor of claim 20, wherein the recessed section includes a predetermined length that serves as a member for arresting the directional movement of the slide mechanism.

22. A positioning device, comprising;

a host structure having an elongate axis;

a plurality of expandable members connected to the host structure arrayed radially around the elongate axis, the expandable members having a unexpanded state and an expanded state, when in the expanded state the expandable members are operable to position the elongate axis of the positioning device within a lumen;

a slide mechanism, connected to the expandable members and adjacent the host structure, and slidable in the direction of the elongate axis; and

a circumferential member connected to the expandable members between the connection of the slide mechanism and the host structure.

23. A vessel occluding extractor, comprising;

a host structure having an elongate axis;

a plurality of expandable members connected to the host structure arrayed radially around the elongate axis;

a filtering material spanning between each adjacent expandable member to form a filter;

a slide mechanism, connected to the expandable members and adjacent the host structure, and slidable in the direction of the elongate axis; and

a circumferential member connected to the expandable members between the connection of the slide mechanism and the host structure to the expandable members.

24. The device of claim 23, wherein a plurality of expandable members connected to the host structure arrayed radially around the elongate axis includes expandable members having a unexpanded state and an expanded state.

25. The device of claim 24, wherein filtering material spanning between each adjacent expandable member includes filtering material spanning between all adjacent expandable members and has a diameter when in an expanded state that is greater than a lumen diameter within which the device is to be placed.

26. A method of extracting vessel occluding material, comprising;

advancing a vessel occluding material extractor, having a plurality of expandable members connected to a host structure having an elongate axis, and longitudinally aligned and arrayed radially around the elongate axis, to a predetermined position within a lumen, wherein the expandable members have an unexpanded state for advancing the extractor; and

bending the expandable members to expand the extractor to an expanded state, having a second diameter larger than the first diameter.

27. The method of claim 26, wherein advancing a vessel occluding material extractor, includes advancing a vessel occluding material extractor having material spanning between a distal half of the plurality of expandable members to form a filter.

28. The method of claim 26, wherein advancing a vessel occluding material extractor, includes advancing a vessel occluding material extractor having a circumferential member connected to the expandable members.

29. The method of claim 26, wherein bending the expandable members to expand the extractor to an expanded state includes bending the expandable members to form a filtering device.

30. A method of extracting vessel occluding material, comprising;

advancing a positioning device, having a plurality of expandable members and an elongate central axis, to a predetermined position within a lumen, the positioning device having a first diameter;

expanding the expandable members to expand the positioning device to have a second diameter larger than the first diameter;

advancing a treatment device generally parallel to the elongate central axis of the positioning device; and

positioning the treatment device proximate the positioning device.

31. The method of claim 30, wherein the positioning device includes a catheter centered along the central axis.

32. The method of claim 31, wherein advancing a positioning device includes advancing the positioning device along a guidewire.

33. The method of claim 31, wherein advancing a treatment device includes advancing a treatment device through the catheter of the positioning device.

34. The method of claim 30, wherein advancing a treatment device includes advancing a treatment device along the central axis of the positioning device.

35. The method of claim 30, wherein expanding the expandable members includes manually expanding the expandable members.

36. The method of claim 30, wherein positioning the treatment device proximate the positioning device includes positioning the treatment device on the proximal side of the positioning device with respect to the direction the treatment device is advanced.

37. The method of claim 30, wherein positioning the treatment device proximate the positioning device includes positioning the treatment device on the distal side of the positioning device with respect to the direction the treatment device is advanced.