Embolic protection device

• US 20050283184A1
• Filed: 12/15/2004
• Published: 12/22/2005
• Est. Priority Date: 11/07/1997
• Status: Active Grant

• Current Assignee: Salviac Ltd. (Abbott Laboratories Incorporated)
• Original Assignee: Salviac Ltd. (Abbott Laboratories Incorporated)
• Inventors: Brady, Eamon, Vale, David, Taylor, Charles, Maher, Padraig, Gilson, Paul
• Granted Patent: US 7,842,063 B2
• Time in Patent Office: Days
• 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

1-42. -42. (canceled)

43. An embolic protection device, comprising:

an elongate member having a proximal end and a distal end, and a transversely extending protrusion;

a tubular member disposed about the elongate member at least a portion of the tubular member being slidable over the elongate member;

a porous member attached to the tubular member; and

wherein the protrusion limits the sliding movement of the tubular member over the elongate member.

44. An embolic protection device in accordance with claim 43, wherein the tubular member includes a plurality of struts connected thereto.

45. An embolic protection device in accordance with claim 44, wherein the struts comprise NiTi alloy.

46. An embolic protection device in accordance with claim 45, wherein the NiTi alloy comprises Nitinol.

47. An embolic protection device in accordance with claim 44, wherein the struts are moveable between a first position and an expanded position.

48. An embolic protection device in accordance with claim 47, wherein the porous membrane is attached to the struts.

49. An embolic protection device in accordance with claim 48, wherein, when the struts move from the first position to the expanded position, the porous membrane moves from a collapsed to an expanded position.

50. An embolic protection device in accordance with claim 49, wherein, when the porous membrane is in the expanded position, blood and emboli can pass by a proximal portion of the struts, blood can flow through the porous membrane, and emboli can be retained by the porous membrane.