Embolic Protection Device

• US 20170265983A1
• Filed: 06/06/2017
• Published: 09/21/2017
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Lam, Cang, Tsai, Priscilla, Valencia, Juan, Macias, Jacqueline, Joshi, Kaushik, Tuason, Arnold
• Granted Patent: US 11,166,804 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0017 differing in yarn density
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An embolic protection device includes an expandable and contractible filter that can be supported by one or more struts. The struts can be connected to the filter or interwoven into the filter, so as to assist in the expansion and contraction of the filter. In one embodiment, the proximal ends of the struts connect to a joint that is fixed in position relative to a delivery wire, while the distal end of the filter connect to a joint that slides relative to the delivery wire.

Claims

1. An embolic protection device, comprising:

an elongated body member; and

,

a mesh filter comprising a first plurality of woven wires;

said mesh filter fully expanding to a conical shape having a proximal edge region;

wherein said proximal edge region can be selectively decreased in diameter while substantially maintaining a radial size of said conical shape, to at least partially close around particles captured in said mesh filter.

2. The embolic protection device of claim 1, further comprising a second plurality of wires that are partially woven with said first plurality of woven wires, and that further extend proximally from said proximal edge of said conical shape and having proximal ends coupled to said elongated body.

3. The embolic protection device of claim 2, further comprising a fixed joint connected to said elongated body member and to said proximal ends of said second plurality of wires.

4. The embolic protection device of claim 3, further comprising a sliding joint connected to said elongated body member to slide relative thereto, and further connected to said first plurality of wires.

5. The embolic protection device of claim 2, wherein said first plurality of wires have a diameter within a range of about 0.0005-0.00225 inch and wherein said second plurality of wires

6. The embolic protection device of claim 1, wherein said proximal end region is less porous than a remaining distal region of said conical shape.

7. The embolic protection device of claim 6, wherein said proximal edge region is heat set to form a more compressed configuration when said mesh filter is fully, radially expanded, as compared with said remaining distal region of said conical shape.

8. The embolic protection device of claim 6, wherein said proximal edge region has a different weave pattern than said remaining distal region of said conical shape.

9. The embolic protection device of claim 2, wherein said first plurality of woven wires are in a range of 72 to 288 wires, and said second plurality of wires are in a range of 4 to 16 wires.

10. An embolic protection device, comprising:

an elongated body member; and

,

a mesh filter comprising a plurality of woven wires;

wherein said mesh filter has a compressed first configuration being radially sized to fit within a delivery catheter;

wherein said mesh filter has a second configuration being fully radially expanded and forming a conical shape having an opening of a first diameter in a proximal direction; and

,

wherein said mesh filter has a third configuration;

said third configuration decreasing a proximal edge portion of said mesh filter to a second diameter that is smaller than said first diameter while substantially maintaining a radial size of said conical shape from said second configuration, so as to at least partially close around particles captured in said mesh filter.

11. The embolic protection device of claim 10, further comprising a plurality of struts woven with said plurality of wires and extending proximally from said mesh filter.

12. The embolic protection device of claim 11, wherein said struts have a larger diameter than said plurality of wires.

13. The embolic protection device of claim 10, wherein said proximal edge portion of said mesh filter is less porous than a remaining distal portion of said mesh filter.

14. The embolic protection device of claim 13, wherein said proximal edge portion is heat set to form a more compressed configuration when said mesh filter is fully, radially expanded in said second configuration, as compared with said remaining distal portion of said mesh filter.

15. The embolic protection device of claim 13, wherein said proximal edge portion has a different weave pattern than said remaining distal portion of said mesh filter.

16. A method of using an embolic protection device, comprising:

deploying from a catheter a mesh filter located on an elongated body;

said mesh filter formed from a plurality of woven wires;

allowing said mesh filter to expand to a conical shape with a proximally-facing opening;

capturing embolic particles; and

,

decreasing a diameter of a proximal edge of said mesh filter while substantially maintaining a radial size of said conical shape.

17. The method of claim 16, wherein said decreasing a diameter of a proximal edge or said mesh filter further comprises expanding only a proximal edge region.

18. The method of claim 16, wherein said proximal edge has a different weaving pattern than a remaining distal portion of said mesh filter.