Guided filter with support wire and methods of use

• US 7,235,061 B2
• Filed: 09/19/2003
• Issued: 06/26/2007
• Est. Priority Date: 08/03/1999
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Tsugita, Ross S.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US10/666,043
• Publication Number:
  US 20040059372A1
• Time in Patent Office: 1,376 Days
• Field of Search: 604104-109, 604/507, 604/508, 604/509, 604/510, 606/191, 606/194, 606/198, 606/200
• US Class Current: 604/104
• 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 2/958 Inflatable balloons for placing stents or stent-grafts
• 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 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• 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 25/09 Guide wires
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A guided filter system for temporary placement of a filter in an artery or vein is disclosed. The system includes a guidewire slideable through a wire guide included in a distal region of a support wire. The support wire has an expandable filter, which is operable between a collapsed or enlarged condition. A variety of endovascular devices, including angioplasty, atherectomy, and stent-deployment catheters, are insertable over the guidewire and/or the support wire. Methods of using the guided filter system to direct and exchange endovascular devices to a region of interest, and to entrap and remove embolic material from the vessel are also disclosed.

Claims

1. A percutaneous filter system comprising:

a guidewire;

a first sheath comprising a lumen adapted to receive the guidewire;

a filter wire having a distal region;

an expandable filter positioned on the distal region of the filter wire; and

a second sheath having a distal region, a proximal region and a lumen extending therebetween, the lumen adapted to receive the filter wire and the expandable filter;

wherein the first sheath is positioned proximate the distal region of the second sheath.

2. The percutaneous filter system of claim 1, wherein the second sheath comprises a catheter.

3. The percutaneous filter system of claim 2, wherein the catheter comprises an exterior surface, and the first sheath is secured to the exterior surface of the catheter.

4. The percutaneous filter system of claim 1, further comprising an elongate member having a proximal region and a distal region.

5. The percutaneous filter system of claim 4, wherein the first sheath comprises a tubular segment and is secured to the distal region of the elongate member.

6. The percutaneous filter system of claim 4, wherein the second sheath comprises a tubular segment and is secured to the distal region of the elongate member.

7. The percutaneous filter system of claim 1, further comprising a percutaneous medical instrument, wherein the filter wire is adapted to receive the percutaneous medical instrument.

8. The percutaneous filter system of claim 7, wherein the percutaneous medical instrument comprises a percutaneous medical instrument selected from the group consisting of an angioplasty catheter, a stern-deployment catheter, an atherectomy catheter, an intravascular ultrasound catheter, and an aspiration catheter.

9. A method of deploying a percutaneous medical instrument, comprising steps of:

providing a percutaneous filter apparatus comprising a guidewire, a first sheath adapted to receive the guidewire, a filter wire having a distal region and an expandable filter positioned on the distal region of the support wire, a second sheath adapted to receive the support wire and the expandable filter, the second sheath having a distal region, the first sheath being secured to the distal region of the second sheath;

providing a percutaneous medical instrument;

advancing the guidewire into a region of interest;

advancing the filter apparatus along the guidewire, the first sheath engaging the guidewire, the support wire positioned within the second sheath;

withdrawing the second sheath;

deploying the filter downstream of the region of interest; and

advancing the percutaneous medical instrument along either the guidewire or the filter wire.

10. The method of claim 9, wherein the percutaneous medical instrument is advanced over the filter wire subsequent to withdrawing the guidewire.

11. The method of claim 9, wherein the percutaneous medical instrument is advanced over the guidewire.

12. The method of claim 9, wherein providing a percutaneous filter apparatus includes providing a first sheath comprising a tubular segment and a second sheath comprising a catheter having a distal region, where the first sheath is secured to the distal region of the second sheath.

13. The method of claim 9, wherein providing a percutaneous filter apparatus includes providing an elongate member, a first sheath comprising a tubular segment and a second sheath comprising a tubular member, where the first sheath and the second sheath are secured to the elongate member.

14. The method of claim 9, wherein the percutaneous medical instrument comprises a percutaneous medical instrument selected from the group consisting of an angioplasty catheter, a stent-deployment catheter, an atherectomy catheter, an intravascular ultrasound catheter, and an aspiration catheter.