Vascular filter system

• US 7,399,308 B2
• Filed: 07/19/2002
• Issued: 07/15/2008
• Est. Priority Date: 02/12/1999
• Status: Expired due to Fees

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Welch, Jeffrey, Sutton, Gregg S., Maciejewski, Mark, Borillo, Thomas
• Primary Examiner(s): Manahan; Todd e.
• Assistant Examiner(s): Mendoza; Michael G
• Application Number:
  US10/198,670
• Publication Number:
  US 20030060844A1
• Time in Patent Office: 2,188 Days
• Field of Search: 606/200, 606/1, 606/159, 606/198
• US Class Current: 606/200
• 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: 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 2002/016 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 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61M 2025/09125 Device for locking a guide wire in a fixed position with respect to the catheter or the human body

Abstract

A removable vascular filter system for capture and retrieval of emboli while allowing continuous perfusion of blood, comprising a porous filter membrane and a filter membrane support structure. This system is useful for any percutaneous angioplasty, stenting, thrombolysis or tissue ablation procedure. The system may minimize the incidence of stroke, myocardial infarction or other clinical complications that may be associated with these procedures.

Claims

1. A removable, percutaneously delivered vascular filter for blocking and capturing micro and macro emboli in a chamber of the heart comprising:

a catheter shaft having proximal and distal ends and a lumen configured to receive a second medical device and extending therethrough;

a distally facing, single walled, collapsible filter membrane having an open distal end, a closed proximal end, the open distal end defining a volume that is configured to receive particulate matter in a chamber of the heart as the blood flows into the open distal end, the filter membrane is fixedly secured to the catheter shaft via a single band only at its closed proximal end, such that the closed proximal end is constrained from movement along the catheter shaft and the open distal is configured to make contact with the catheter shaft when in a collapsed position, the collapsible filter membrane comprising a tapered section proximate the single band and cylindrical section for making contact with the lumen in which the membrane is positioned, the cylindrical section comprising approximately half of the length of the membrane for making contact with the lumen, the catheter shaft extending distally beyond the single walled filter membrane; and

a sheath arranged concentrically around the catheter shaft, the sheath being moveable relative to the catheter shaft so that the filter membrane is deployed when the sheath is retracted and closed when the sheath is advanced, the sheath configured to trap particulate matter in the single walled filter membrane when the sheath is advanced to cover and collapse the single walled filter membrane.