Embolic protection device

• US 8,430,901 B2
• Filed: 06/13/2007
• Issued: 04/30/2013
• Est. Priority Date: 11/07/1997
• Status: Expired due to Fees

• Current Assignee: Salviac Ltd. (Abbott Laboratories Incorporated)
• Original Assignee: Salviac Ltd. (Abbott Laboratories Incorporated)
• Inventors: Gilson, Paul, Brady, Eamon, Maher, Padraig, Vale, David, Taylor, Charles
• Primary Examiner(s): TYSON, MELANIE RUANO
• Application Number:
  US11/762,440
• Publication Number:
  US 20070239200A1
• Time in Patent Office: 2,148 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. An embolic protection filter comprising:

a filter body having an inlet end and an outlet end, the inlet end of the filter body having one or more inlet openings sized to allow blood and embolic material enter the body, the outlet end of the filter body having a plurality of outlet openings sized to allow through passage of blood but to retain undesired embolic material within the filter body;

a self-expanding filter support comprising a proximal end and a distal end, the filter support movable between a collapsed position for movement through the vascular system and an extended outwardly projecting position to support the filter body in an expanded position; and

a carrier for coupling the filter to a guidewire,

the proximal end of the filter support is attached to the carrier

the outlet end of the filter body is rotatably and slidably disposed on the carrier via a tubular collar, and

the carrier extends the length of the filter body,

wherein the filter support terminates proximally of the tubular collar.

2. A filter as claimed in claim 1, wherein the proximal end of the filter support is fixed to the carrier and the distal end of the filter support is not fixed to the carrier.

3. A filter as claimed in claim 1, wherein the filter body comprises a shaped polymeric membrane.

4. A filter as claimed in claim 1, wherein the inlet end of the filter body is fixed to the carrier.