EXTENDABLE ASPIRATION CATHETER

• US 20100030186A1
• Filed: 07/31/2008
• Published: 02/04/2010
• Est. Priority Date: 07/31/2008
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Stivland, Timothy
• Granted Patent: US 8,465,456 B2
• Time in Patent Office: Days
• US Class Current: 604/510
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 2017/22079 with suction of debris
• 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
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• CPC Class Codes: A61M 25/0169 Exchanging a catheter while keeping the guidewire in place
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

An intravascular aspirating assembly comprising an elongate guidewire having a proximally facing filter disposed on a distal portion thereof, a single operator exchange aspiration catheter disposed on the guidewire, the aspiration catheter having a proximal end, a distal end and an aspiration lumen extending therebetween, an extension catheter slidably disposed in the aspiration lumen and having a length greater than that of the aspiration catheter.

Claims

1. An intravascular aspirating assembly comprising:

an elongate guidewire having an occlusion device disposed on a distal portion thereof;

an aspiration catheter disposed on the guidewire, the aspiration catheter having a proximal end, a distal end and an aspiration lumen extending therebetween; and

an extension catheter tube slidably disposed in the aspiration lumen and having a length greater than that of the aspiration catheter,

wherein the occlusion device is capable of limiting distal travel of the aspiration catheter at a first distal position relative to the guidewire and further wherein the distal end of the extension catheter tube is capable of advancing to a second distal position distal of the first distal position relative to the guidewire.

2. The assembly of claim 1, wherein the aspiration catheter further includes a guidewire lumen having a distal opening at the distal end of the aspiration catheter and a proximal opening less than 30 cm from the distal opening.

3. The assembly of claim 1, wherein the extension catheter has a fitting at the proximal end suitable for connection to a syringe.

4. The assembly of claim 1, wherein the extension catheter tube has an outer diameter that is substantially constant along at least 75% of the length of the extension catheter tube and wherein this substantially constant outer diameter terminates no farther than 2 cm from the distal end of the extension catheter tube.

5. The assembly of claim 1, wherein the extension catheter has a tapered distal end.

6. The assembly of claim 5, wherein the tapered distal end includes a chamfer in a single plane extending across substantially the whole width of the distal end.

7. The assembly of claim 5, wherein the tapered distal end is a snub nose.

8. The assembly of claim 4, wherein the extension catheter outer diameter is substantially equal to an inner diameter of the aspiration catheter tube that extends along substantially the whole length of the aspiration catheter.

9. The assembly of claim 1, wherein the extension catheter outer diameter has an outer diameter that is substantially constant and wherein the extension catheter comprises a circumferential ridge having a diameter greater than the outer diameter and disposed on the extension catheter.

10. The assembly of claim 9 wherein the circumferential ridge is proximal of the distal tip of the extension catheter.

11. The assembly of claim 1, further comprising a circumferential ridge disposed in the aspiration lumen.

12. The assembly of claim 1, wherein the occlusion device is a proximally facing distal protection filter.

13. The assembly of claim 1, wherein the occlusion device is a distal occlusion balloon.

14. The assembly of claim 1, wherein the extension catheter includes a distal portion that has a non-straight curve when in an unconstrained position.

15. The assembly of claim 14 wherein the curve is a simple arc.

16. The assembly of claim 14 wherein the curve is an ogee curve in a plane that intersects with a longitudinal axis of the aspiration catheter.

17. The assembly of claim 14 wherein the curve is a helical curve.

18. The assembly of claim 1 wherein the extension catheter defines a lumen along the length of the aspiration catheter.

19. The assembly of claim 1 wherein the extension catheter includes a proximal tubular portion and a distal tubular portion both disposed along an elongate axis and spaced apart by a structural member offset from the elongate axis.

20. The assembly of claim 19 wherein the structural member is a wire.

21. The assembly of claim 19 wherein the structural member is a ribbon.

30. A method of using the assembly of claim 1, comprising the steps of:

advancing the elongate guidewire intravascularly so that the occlusion device is downstream of a region of interest;

deploying the occlusion device;

performing a therapeutic procedure at the area of interest;

advancing the aspiration catheter to a point proximate the occlusion device;

advancing the extension catheter through the aspiration catheter;

advancing the distal end of the extension catheter past the distal end of the aspiration catheter; and

aspirating embolic debris through the extension catheter.

31. The method of claim 30 wherein the steps of advancing the aspiration catheter and advancing the extension catheter occur simultaneously.

32. The method of claim 30 wherein the step of advancing the extension catheter is subsequent of the step of advancing the aspiration catheter.

33. The method of claim 30 wherein the occlusion device is a proximally facing distal protection filter and wherein the step of advancing the distal end of the extension catheter includes advancing the distal end of the extension catheter into the distal protection filter.

34. The method of claim 30 wherein the step of advancing the aspiration catheter includes the step of advancing the aspiration catheter distal end past the region of interest.

22. An intravascular aspirating assembly comprising:

an elongate guide wire having a proximally facing filter disposed on a distal portion thereof;

an aspirating catheter disposed on the guide wire, the aspirating catheter having a proximal end, a distal end and an aspiration lumen extending therethrough; and

an extension catheter tube disposed in the aspiration lumen and having a length greater than that of the aspiration catheter, the extension catheter tube being discontinuous and including a proximal tubular portion and a distal tubular portion, spaced apart, and connected by a connecting member,

wherein the proximally facing filter is capable of limiting distal travel of the aspiration catheter at a first distal position relative to the guidewire and wherein the distal end of the extension catheter tube is capable of advancing to a second distal position distal of the first distal position relative to the guidewire.

23. The assembly of claim 22, wherein the aspiration catheter further includes a guidewire lumen having a distal opening at the distal end of the aspiration catheter and a proximal opening less than 30 cm from the distal opening.

24. The assembly of claim 22, wherein the extension catheter has a fitting at the proximal end suitable for connection to a syringe.

25. The assembly of claim 22, wherein the extension catheter tube has an outer diameter that is substantially constant along at least 75% of the length of the extension catheter tube and wherein this substantially constant outer diameter terminates no farther than 2 cm from the distal end of the extension catheter tube.

26. The assembly of claim 22, wherein the extension catheter has a tapered distal end.

27. The assembly of claim 26, wherein the tapered distal end includes a chamfer in a single plane extending across substantially the whole width of the distal end.

28. The assembly of claim 26, wherein the tapered distal end is a snub nose.

29. The assembly of claim 25, wherein the extension catheter outer diameter is substantially equal to an inner diameter of the aspiration catheter tube that extends along substantially the whole length of the aspiration catheter.