Vascular filter system for cardiopulmonary bypass

• US 7,229,463 B2
• Filed: 02/26/2002
• Issued: 06/12/2007
• Est. Priority Date: 07/30/1999
• Status: Expired due to Term

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Original Assignee: AngioGuard, Inc. (Cardinal Health, Inc.)
• Inventors: Welch, Jeffrey, Sutton, Gregg S.
• Primary Examiner(s): THALER, MICHAEL H
• Application Number:
  US10/083,868
• Publication Number:
  US 20020091409A1
• Time in Patent Office: 1,932 Days
• Field of Search: 606/200, 604/8, 604/9
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• 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 2002/016 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 2230/0067 conical
• CPC Class Codes: A61F 2230/0071 spherical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0086 Pyramidal, tetrahedral, or wedge-shaped
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation

Abstract

A removable vascular filter system for capture and retrieval of emboli while allowing continuous perfusion of blood during a cardiopulmonary bypass procedure, comprising a porous filter membrane with variable diameter holes, and a filter membrane support structure. The system may minimize the incidence of stroke, myocardial infarction or other clinical complications that may be associated with cardiopulmonary bypass procedures.

Claims

1. A cardiopulmonary bypass filter system comprising:

a housing having distal and proximal ends, the proximal end comprising a connector adapted to connect to at least one hose and the distal end comprising a distal member having first and second openings, wherein the housing comprises a first lumen adapted to be in fluid communication with the at least one hose and one of the first and second openings and a second lumen extending from a port to the other of the first and second openings in the housing distal member; and

a vascular filter system comprising a collapsible filter advancable through the housing port, said vascular filter system comprising (a) a filter membrane support structure, and (b) a fitter membrane attached to said filter membrane support structure, said filter membrane having openings, wherein said openings have variable diameters with respect to one another, and wherein the diameter of said openings range from about 20 to about 300 microns, each of the openings defining a substantially circumferential configuration and having additional distinct fibers attached to and extending from the circumference of the openings of the filter membrane to increase embolic capture.

2. The filter system of claim 1, wherein the housing is adapted to be connected to a cardiopulmonary bypass machine.

3. The filter system of claim 1, wherein said housing has a distal flange.

4. The filter system of claim 3, wherein said flange is rigid or flexible.

5. The filter system of claim 1, wherein said two lumens form a substantially V-shape.

6. The filter system of claim 1, wherein said housing distal member is capable of extending into a blood vessel.

7. The filter system of claim 1 wherein said openings are non-uniformly spaced.