Filter wire system

• US 20030199819A1
• Filed: 05/14/2002
• Published: 10/23/2003
• Est. Priority Date: 04/17/2002
• Status: Abandoned Application

• Current Assignee: Sprite Solutions
• Original Assignee: Sprite Solutions
• Inventors: Beck, Robert C.
• Application Number:
  US10/145,674
• Publication Number:
  US 20030199819A1
• Time in Patent Office: Days
• US Class Current: 604/96.01
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22082 after introduction of a substance
• CPC Class Codes: A61F 2/014 Retrograde blood flow filters, i.e. device inserted against the blood flow direction
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/008 paraboloidal

Abstract

A therapeutic interventional device such as a balloon catheter is provided with a nozzle to induce a retrograde flow in the vessel by injecting fluid through the nozzle into the vessel. The retrograde flow can be used to clear debris from a distal protection device such as a filter or balloon and may additionally be used to clear the vessel of clot prior to the intervention.

Claims

1. A method for extracting debris from a vessel having a lesion comprising the steps of:

placing a therapy catheter in contact with a lesion;

inflating the therapy balloon to treat the lesion producing debris;

injecting fluid into a extraction section creating a pressure gradient across the therapy balloon while it is inflated;

deflating the therapy balloon while injecting fluid to promote a retrograde flow across the surface of the therapy balloon entraining, capturing and moving debris in the retrograde direction.

2. The method of claim 1 further including the step of extracting said debris from a location proximal of said extraction section with a tube.

3. The method of claim 1 further comprising an initial step of traversing a treatable lesion with an occlusion device and deploying the occlusion device distal of said therapy balloon.

4. The method of claim 2 wherein said distal occlusion device is a filter.

5. The method of claim 2 wherein said distal occlusion device is an inflatable balloon.