EMBOLIC PROTECTION DEVICE

• US 20070162070A1
• Filed: 12/13/2006
• Published: 07/12/2007
• Est. Priority Date: 11/07/1997
• Status: Active Grant

• Current Assignee: Salviac Ltd. (Abbott Laboratories)
• Original Assignee: Salviac Ltd. (Abbott Laboratories)
• Inventors: Brady, Eamon, Vale, David, Taylor, Charles, Maher, Padraig, Gilson, Paul
• Granted Patent: US 8,603,131 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 on 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 allow some manipulation of the guidewire independently of the filter when the filter is in use.

Claims

1. An embolic protection device, comprising:

a support element for delivery through a vascular system of a patient; and

a filter element associated with the support element, the filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the filter element but embolic material in the blood is retained in the filter element;

the filter element comprising a tubular or frusto-conical body, a tapered proximal end, and a tapered distal end when the filter element is at the expanded position.

2. The embolic protection device of claim 1, wherein the tubular or frusto-conical body includes at least one notch.

3. The embolic protection device of claim 2, wherein the at least one notch is a plurality of notches.

4. The embolic protection device of claim 2, wherein the at least one notch includes a substantially tubular portion.

5. The embolic protection device of claim 1, wherein the tubular or frusto-conical body includes at least one protrusion.

6. The embolic protection device of claim 5, wherein the at least one protrusion includes a substantially tubular portion.

7. The embolic protection device of claim 1, wherein tubular or frusto-conical body is a frusto-conical body.

8. The embolic protection device of claim 7, wherein the frusto-conical body is inclined radially inward from a distal portion of the frusto-conical body to a proximal portion of the frusto-conical body.

9. The embolic protection device of claim 7, wherein the frusto-conical body is inclined radially outward from a distal portion of the frusto-conical body to a proximal portion of the frusto-conical body.

10. The embolic protection device of claim 1, wherein tubular or frusto-conical body is a tubular body.

11. The embolic protection device of claim 10, wherein a distal portion of the tubular body has greater radial circumference than a proximal portion of the body.

12. The embolic protection device of claim 10, wherein a distal portion of the tubular body has smaller radial circumference than a proximal portion of the body.

13. The embolic protection device of claim 1, wherein the filter element comprises a frame member.

14. A method for providing embolic protection, comprising:

advancing a support element through a vascular system of a patient, wherein a filter element is associated with the support element, the filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the filter element but embolic material is retained in the filter element, the filter element comprising a tubular or frusto-conical body with a tapered proximal end and an tapered distal end when the filter element is at the expanded position; and

engaging the filter element with a wall of the blood vessel.

15. The method of claim 14, wherein tubular or frusto-conical body is a frusto-conical body.

16. The method of claim 14, wherein tubular or frusto-conical body is a tubular body.

17. The method of claim 14, wherein the filter element comprises a frame member.

18. The method of claim 14, further comprising removing a sheath from the filter element thereby allowing the filter element to move from the collapsed stored position to the expanded position.