Embolic protection device with an elongated superelastic radiopaque core member

• US 20060212068A1
• Filed: 05/22/2006
• Published: 09/21/2006
• Est. Priority Date: 05/01/2003
• Status: Abandoned Application

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: Geiser, Timothy A., Boylan, John F.
• Application Number:
  US11/437,710
• Publication Number:
  US 20060212068A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• 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 2230/008 paraboloidal
• CPC Class Codes: A61L 31/18 Materials at least partially X-ray or laser opaque

Abstract

An elongated core member and an expandable frame for an embolic filtering device used to capture embolic debris in a body lumen. The expandable frame also includes a filtering element. A nickel-titanium alloy is used to form the frame, the elongated core member, or both the frame and the elongated core member. The nickel-titanium alloy includes at least one ternary element, such as iridium, platinum, gold, rhenium, tungsten, palladium, rhodium, tantalum, silver, ruthenium, or hafnium, so that the frame and/or elongated core member is also radiopaque.

Claims

1. An embolic protection device comprising:

an elongated core member having a proximal core section and a distal core section, said elongated core member comprising a superelastic nickel-titanium alloy wherein said superelastic nickel-titanium alloy comprises at least one ternary element, such that at least a portion of said elongated core member exhibits radiopacity.

2. The embolic protection device of claim 1, wherein said at least one ternary element is chosen from iridium, platinum, palladium, gold, rhenium, tungsten, palladium, rhodium, tantalum, silver, ruthenium, hafnium, and combinations thereof.

3. The embolic protection device of claim 1, wherein said at least one ternary element is present in said superelastic nickel-titanium alloy in an amount ranging from greater than 0 to about 20 atomic %.

4. The embolic protection device of claim 3, wherein said at least one ternary element is chosen from platinum, palladium, tungsten, and combinations thereof.

5. The embolic protection device of claim 4, wherein said at least one ternary element is platinum.

6. The embolic protection device of claim 1, wherein said radiopacity is limited to said distal core section.

7. The embolic protection device of claim 1, wherein the level of radiopacity of said nickel-titanium alloy comprising at least one ternary element is greater then the radiopacity of a binary superelastic nickel-titanium alloy.

8. The embolic protection device of claim 1, wherein the embolic protection device comprises an expandable filter assembly having an expandable frame and a filter element coupled to the expandable frame.

9. The embolic protection device of claim 8, wherein said expandable frame at least partially covers said elongated core member in an unexpanded state.

10. A medical device comprising:

an elongated core member having a proximal core section and a distal core section, said elongated core member comprising a superelastic nickel-titanium alloy, wherein said superelastic nickel-titanium alloy comprises at least one ternary element, such that at least a portion of said elongated core member exhibits radiopacity; and

a filter coupled to the distal core section of said elongated core member.

11. The device of claim 10, wherein said at least one ternary element is chosen from iridium, platinum, palladium, gold, rhenium, tungsten, palladium, rhodium, tantalum, silver, ruthenium, hafnium, and combinations thereof.

12. The device of claim 10, wherein said at least one ternary element is present in said superelastic nickel-titanium alloy in an amount ranging from greater than 0 to about 20 atomic %.

13. The device of claim 10, wherein said at least one ternary element is chosen from platinum, palladium, tungsten, and combinations thereof.

14. The device of claim 13, wherein said at least one ternary element is platinum.

15. The device of claim 10, wherein said radiopacity is limited to said distal core section.

16. The device of claim 10, wherein the level of radiopacity of the nickel-titanium alloy comprising at least one ternary element is greater then the radiopacity of a binary superelastic nickel-titanium alloy.

17. The device of claim 10, wherein said filter comprises an expandable frame and a filter element coupled to the expandable frame.

18. A medical device comprising:

an elongated core member having a proximal core section and a distal core section, wherein said elongated core member comprises a superelastic nickel-titanium alloy having a radiopaque material coated thereon; and

a filter coupled to the distal core section of said elongated core member.

19. The device of claim 18, wherein the filter comprises an expandable assembly having an expandable frame and a filter element coupled to the expandable frame.

20. The device of claim 19, wherein said expandable frame at least partially covers said distal core guiding member in an unexpanded state.

21. An embolic protection device comprising:

an elongated core member having a proximal core section and a distal core section, wherein said elongated core member comprises a ternary superelastic nickel-titanium-platinum alloy such that at least a portion of said elongated core member exhibits radiopacity; and

a filter coupled to the distal core section of said elongated core member, wherein said filter comprises an expandable assembly having an expandable frame and a filter element coupled to the expandable frame.