RECANALIZATION DEVICE WITH EXPANDABLE CAGE

• US 20110054504A1
• Filed: 08/27/2010
• Published: 03/03/2011
• Est. Priority Date: 08/31/2009
• Status: Abandoned Application

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Porter, Stephen C.
• Application Number:
  US12/870,485
• Publication Number:
  US 20110054504A1
• Time in Patent Office: Days
• US Class Current: 606/159
• 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 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A vascular recanalization device for re-establishing blood flow through a vessel lumen. The vascular recanalization device includes an elongate wire and an expandable cage slidably coupled to the elongate wire. The expandable cage includes a proximal collar slidably disposed on the elongate wire and a distal collar slidably disposed on the elongate wire. A central stop is secured to the elongate wire intermediate the proximal collar and the distal collar. A proximal stop is located proximal of the proximal collar of the expandable cage, and a distal stop is located distal of the distal collar of the expandable cage. The proximal collar is slidable along the elongate wire between the proximal stop and the central stop, and the distal collar is slidable along the elongate wire between the central stop and the distal stop.

Claims

1. A medical device comprising:

an elongate wire having a proximal end and a distal end;

an expandable cage having a proximal end and a distal end, the expandable cage being coupled to the elongate wire such that the expandable cage is longitudinally slidable along a length of the elongate wire between a first position and a second position; and

at least one stop secured to the elongate wire between the proximal end and the distal end of the expandable cage;

wherein the proximal end of the expandable cage is prevented from sliding distally beyond the at least one stop and the distal end of the expandable cage is prevented from sliding proximally beyond the at least one stop.

2. The medical device of claim 1, wherein the proximal end of the expandable cage is slidably coupled to the elongate wire and the distal end of the expandable cage is slidably coupled to the elongate wire.

3. The medical device of claim 2, wherein the elongate wire is longitudinally translatable through the expandable cage while the cage remains stationary.

4. The medical device of claim 1, wherein the expandable cage includes a proximal collar slidably disposed on the elongate wire, a distal collar slidably disposed on the elongate wire, and an expandable mesh extending between the proximal collar and the distal collar.

5. The medical device of claim 4, wherein the at least one stop is located between the proximal collar and the distal collar of the expandable cage.

6. The medical device of claim 5, wherein the expandable mesh circumferentially surrounds and is spaced away from the at least one stop.

7. The medical device of claim 5, further comprising a proximal stop located proximal of the proximal collar and a distal stop located distal of the distal collar.

8. The medical device of claim 7, wherein the proximal collar is slidable along the elongate wire between the proximal stop and the at least one stop, and the distal collar is slidable along the elongate wire between the at least one stop and the distal stop.

9. The medical device of claim 8, wherein in the first position the at least one stop abuts the distal collar and is spaced away from the proximal collar, and in the second position the at least one stop abuts the proximal collar and is spaced away from the distal collar.

10. The medical device of claim 7, wherein the expandable cage has an expanded cage length and a collapsed cage length, wherein the distance between the proximal stop and a distal end of the at least one stop is equal to or greater than the collapsed cage length, and wherein the distance between the distal stop and a proximal end of the at least one stop is equal to or greater than the collapsed cage length.

11. A vascular recanalization device comprising:

an elongate wire having a proximal end and a distal end;

an expandable cage slidably coupled to the elongate wire, the expandable cage including a proximal collar slidably disposed on the elongate wire and a distal collar slidably disposed on the elongate wire;

a central stop secured to the elongate wire intermediate the proximal collar and the distal collar;

a proximal stop located proximal of the proximal collar of the expandable cage; and

a distal stop located distal of the distal collar of the expandable cage;

wherein the proximal collar is slidable along the elongate wire between the proximal stop and the central stop, and the distal collar is slidable along the elongate wire between the central stop and the distal stop.

12. The vascular recanalization device of claim 11, wherein the expandable cage has an expanded cage length and a collapsed cage length, wherein the distance between the proximal stop and a distal end of the central stop is equal to or greater than the collapsed cage length, and wherein the distance between the distal stop and a proximal end of the central stop is equal to or greater than the collapsed cage length.

13. The vascular recanalization device of claim 11, wherein in a first position the central stop abuts the distal collar and is spaced away from the proximal collar, and in a second position the central stop abuts the proximal collar and is spaced away from the distal collar.

14. The vascular recanalization device of claim 11, wherein the expandable cage includes an expandable mesh extending between the proximal collar and the distal collar, the expandable mesh circumferentially surrounding and spaced away from the central stop.

15. The vascular recanalization device of claim 11, wherein the proximal stop is longitudinally displaceable relative to the central stop.

16. The vascular recanalization device of claim 11, wherein the proximal stop is the distal end of an elongate tubular member slidably disposed over the elongate wire.

17. A method of treating a vessel lumen, the method comprising:

providing a medical device including;

an elongate wire having a proximal end and a distal end;

an expandable cage slidably coupled to the elongate wire, the expandable cage including a proximal collar slidably disposed on the elongate wire and a distal collar slidably disposed on the elongate wire; and

a central stop secured to the elongate wire intermediate the proximal collar and the distal collar;

pushing the elongate wire distally, whereby the central stop abuts the distal collar of the expandable cage and is spaced away from the proximal collar; and

pulling the elongate wire proximally, whereby the central stop abuts the proximal collar of the expandable cage and is spaced away from the distal collar.

18. The method of claim 17, wherein during the step of pushing the elongate wire distally, the expandable cage is advanced distally through an elongate tubular member.

19. The method of claim 18, wherein the expandable cage is pulled distally through the elongate tubular member by pushing the elongate wire distally.

20. The method of claim 17, wherein during the step of pulling the elongate wire proximally, the expandable cage is withdrawn proximally through an elongate tubular member.

21. The method of claim 20, wherein the expandable cage is pulled proximally through the elongate tubular member by pulling the elongate wire proximally.

22. The method of claim 17, wherein during the step of pushing the elongate wire distally, the central stop exerts a force on the distal collar, wherein the force has a directional component in a distal direction parallel to a longitudinal axis of the elongate wire.

23. The method of claim 17, wherein during the step of pulling the elongate wire proximally, the central stop exerts a force on the proximal collar, wherein the force has a directional component in a proximal direction parallel to a longitudinal axis of the elongate wire.

24. The method of claim 17, wherein the medical device further includes an elongate tubular member disposed over the elongate wire proximal of the expandable cage, wherein pulling the elongate wire proximally causes the proximal collar to abut a distal end of the elongate tubular member.