Embolic protection device

• US 7,785,342 B2
• Filed: 05/21/2003
• Issued: 08/31/2010
• Est. Priority Date: 11/07/1997
• Status: Expired due to Fees

• Current Assignee: Salviac Ltd. (Abbott Laboratories)
• Original Assignee: Salviac Ltd. (Abbott Laboratories)
• Inventors: Vale, David, Brady, Eamon, Taylor, Charles, Maher, Padraig, Gilson, Paul
• Primary Examiner(s): SEVERSON, RYAN J
• Application Number:
  US10/442,115
• Publication Number:
  US 20030208228A1
• Time in Patent Office: 2,659 Days
• Field of Search: 606/200
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• 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 2002/015 Stop means therefor
• 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 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2230/0097 Harpoon-shaped

Abstract

An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval. The filter element (105) may conveniently be mounted on a tubular sleeve (104) which is slidable and rotatable on the guidewire (101) between spaced-apart stops (106, 120) on the guidewire (101) which allows some manipulation of the guidewire independently of the filter when the filter is in use.

Claims

1. A vascular filtration device, comprising:

a guidewire having a distal region;

a filter assembly disposed over the guidewire, wherein the filter assembly comprises;

a tubular member having the guidewire extending through the tubular member; and

a self-expanding filter element comprising a filter membrane coupled to the tubular member;

a proximal stop affixed to the guidewire; and

a distal stop affixed to the guidewire at the distal region,

wherein the filter assembly is disposed between the proximal stop and the distal stop and the guidewire is longitudinally slidable and rotatable relative to the filter assembly between the proximal stop and the distal stop when the filter assembly is in a deployed state.

2. The device according to claim 1, wherein the filter element comprises a filter membrane and a filter support frame.

3. The device according to claim 1, wherein the filter element includes at least one inlet opening at a proximal end of the filter element and at least one outlet opening towards a distal end of the filter element.

4. The device according to claim 1, wherein the filter assembly is adapted to move independently of the guidewire in the deployed state.

5. A vascular filtration device, comprising:

a guidewire having a distal region;

a filter assembly disposed over the guidewire, wherein the filter assembly comprises;

a tubular member having the guidewire extending through the tubular member; and

a self-expanding filter element comprising a filter membrane coupled to the tubular member;

a proximal stop affixed to the guidewire; and

a distal stop affixed to the guidewire at the distal region,

wherein the filter assembly is disposed between the proximal stop and the distal stop, and the tubular member is adapted for independent movement of the guidewire relative to the tubular member when the filter assembly is in a deployment state between the proximal stop and the distal stop.

6. The device according to claim 5, wherein the filter element is rotatable relative to the guidewire.