Vascular filter system with guidewire and capture mechanism

• US 6,485,501 B1
• Filed: 08/11/2000
• Issued: 11/26/2002
• Est. Priority Date: 08/11/2000
• Status: Expired due to Term

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Green, Nicholas A.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US09/635,741
• Time in Patent Office: 837 Days
• Field of Search: 606/200, 606/114, 606/127, 606/194, 606/192, 606/198, 606/191, 606/159
• US Class Current: 606/200
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• 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: 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 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped

Abstract

A removable vascular filter system for blocking micro- and macro-emboli while allowing the continued perfusion of blood comprises a filter membrane positioned on a guidewire, wherein a free end of the membrane sits tightly against the guidewire when the filter membrane is in a collapsed state and wherein the filter has a device for deploying the filter membrane to assume a position substantially normal to the longitudinal axis of the guidewire. The filter membrane is comprised of a fine mesh material which has a pore size capable of blocking emboli while allowing continued blood flow, a preferred embodiment of which comprises regularly spaced, laser-formed holes, and in which the membrane has a scalloped proximal profile. A capture mechanism is similarly described.

Claims

1. A catheter having a catheter shaft, and said catheter containing a distal protection device attached to a core wire, said core wire fixed within and with respect to the center of said catheter shaft, and said distal protection device comprising a filter mechanism capable of capturing percutaneous thrombus, and said filter mechanism expansible from a closed first diameter to a protective second diameter.

2. A catheter having a catheter shaft, and said catheter containing a distal protection device attached to a core wire, said core wire fixed within and with respect to the center of said catheter shaft, and said distal protection device comprising a filter mechanism capable of capturing percutaneous thrombus, and said filter mechanism expansible from a closed first diameter to a protective second diameter;

and

a balloon loaded with a stent thereon, said stent located proximal to said distal protection device.

3. In combination:

a balloon catheter fixed to a core wire having a distal end;

a stent loaded on a balloon carried on said catheter;

a distal protection device attached to the distal end of said wire,

said distal protection device located distal to the position of said stent along said balloon; and

a sheath positioned over said stent.

4. In combination:

a balloon catheter fixed to a core wire having a distal end;

a stent loaded on a balloon portion of said catheter;

a distal protection filter attached to the distal end of said wire, said distal protection device located distal to the position of said stent along said balloon; and

a sheath positioned over said stent.