Emboli capturing device and method of manufacture therefor

• US 6,755,847 B2
• Filed: 10/05/2001
• Issued: 06/29/2004
• Est. Priority Date: 10/05/2001
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Eskuri, Alan
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US09/972,135
• Publication Number:
  US 20030069596A1
• Time in Patent Office: 998 Days
• Field of Search: 606/200, 606/113, 606/114, 606/127
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/006 Y-shaped
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped

Abstract

An intravascular filter device comprising a frame having an open configuration and a closed configuration, the frame comprising a plurality of elongate members each having a proximal end and a distal end, and a proximal region and a distal region and being fixedly connected at the proximal end to each other; and a filter having an open end and a closed end disposed on the frame; wherein the elongate members have a bend distal the proximal region and a helical curve over a substantial length of the distal region when the elongate members are in the open configuration.

Claims

1. A method of manufacture of an intravascular filter device comprising the steps of:

providing a tube, the tube having an outer diameter and an inner diameter, an axis running through the center of the tube, and a proximal end and a distal end;

cutting slots in the tube extending from the outer diameter to the inner diameter and from the distal end to a point proximate the proximal end, such that the slots create elongate members having a distal region and a proximal region fixedly attached by a ring of tube material at the proximal end of the tube;

shape-setting the elongate members to expand from a first position to a second position, in the second position the elongate members extending generally away from and around the axis of the tube to form a generally circulative mouth; and

disposing a filter material on the distal end.

2. The method of manufacture of claim 1, wherein the slots have radial walls.

3. The method of manufacture of claim 1, wherein the slots have parallel walls.

4. The method of manufacture of claim 1, wherein the slots are cut such that the elongate members have parallel walls.

5. The method of manufacture of claim 1, wherein the tube comprises a flexible material.

6. The method of manufacture of claim 5, wherein the flexible material is Nitinol.

7. The method of manufacture of claim 1, wherein the shape-setting step comprises shape-setting a bend in the elongate members at a point proximate the proximal region.

8. The method of manufacture of claim 1, wherein the shape-setting step further comprises shape-setting a helical shape into the distal region of the elongate members.