HYDRAULIC CONTROLLED RETRACTABLE TIP FILTER RETRIEVAL CATHETER

• US 20070016247A1
• Filed: 09/22/2006
• Published: 01/18/2007
• Est. Priority Date: 12/13/2001
• Status: Abandoned Application

• Current Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Euteneuer, Charles, Broome, Thomas
• Application Number:
  US11/534,550
• Publication Number:
  US 20070016247A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical

Abstract

Distal protection filter retrieval devices and methods of retrieving a distal protection filter. A filter retrieval catheter may comprise an inner tube, an outer tube disposed over the inner tube, an annular lumen disposed between the inner tube and the outer tube, and a tapered member coupled to the lumen. The tapered member may be movable between a first position for passing a lesion and a second position retrieving a filter.

Claims

1. A filter retrieval catheter, comprising:

an inner tube having a proximal end, a distal end, and an inner lumen extending therethrough;

an outer tube disposed over the inner tube, the outer tube including a proximal end and a distal end, wherein an annular lumen is defined between the inner tube and the outer tube; and

a tip member slidably disposed in the annular lumen for movement between a first position and a second position under the influence of fluid pressure.

2. The filter retrieval catheter in accordance with claim 1, wherein a quantity of fluid is disposed within the annular lumen.

3. The filter retrieval catheter in accordance with claim 1, wherein, in the first position at least a portion of the tip member extends distal of the distal end of the outer tube.

4. The filter retrieval catheter in accordance with claim 1, wherein, in the second position the tip member is disposed proximal to the distal end of the outer tube.

5. The filter retrieval catheter in accordance with claim 1, further comprising a shaft disposed within the inner lumen.

6. The filter retrieval catheter in accordance with claim 5, wherein the shaft includes a filter coupled to the shaft.

7. A method of retrieving a filter from a blood vessel, comprising the steps of:

providing a catheter having a distal tip movable between first and second positions under the influence of fluid pressure;

advancing the catheter to the filter;

altering the fluid pressure to allow the tip to move between the first and the second position;

enclosing the filter at least in part within the catheter; and

removing the catheter and filter proximally from the blood vessel.

8. The method in accordance with claim 7, wherein the step of altering the fluid pressure includes decreasing the fluid pressure, and wherein decreasing the fluid pressure shifts the tip from the first position to the second position.

9. The method in accordance with claim 7, wherein the step of altering the fluid pressure includes increasing the fluid pressure, and wherein increasing the fluid pressure shifts the tip from the first position to the second position.