CA2484867A1 - Inverted embolic protection filter - Google Patents

Inverted embolic protection filter Download PDF

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Publication number
CA2484867A1
CA2484867A1 CA002484867A CA2484867A CA2484867A1 CA 2484867 A1 CA2484867 A1 CA 2484867A1 CA 002484867 A CA002484867 A CA 002484867A CA 2484867 A CA2484867 A CA 2484867A CA 2484867 A1 CA2484867 A1 CA 2484867A1
Authority
CA
Canada
Prior art keywords
embolic protection
protection filter
filter
guidewire
tubular member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002484867A
Other languages
French (fr)
Other versions
CA2484867C (en
Inventor
Thomas E. Broome
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boston Scientific Ltd Barbados
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2484867A1 publication Critical patent/CA2484867A1/en
Application granted granted Critical
Publication of CA2484867C publication Critical patent/CA2484867C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/0108—Both ends closed, i.e. legs gathered at both ends
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
    • A61F2002/015—Stop means therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2002/018—Filters implantable into blood vessels made from tubes or sheets of material, e.g. by etching or laser-cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0067—Three-dimensional shapes conical

Abstract

An embolic protection filter (10) having an inverted membrane (44) with improved blood perfusion characteristics is disclosed. An embolic protection filter in accordance with the present invention comprises a filter frame disposable about a guidewire (14), a support hoop (26) coupled to a plurality of expandable struts, and an inverted membrane for filtering embolic debris.
The inverted membrane has a tapered proximal section and an enlarged diameter distal section. Features of the present invention permit the perfusion of blood through the filter irrespective of embolic debris entrained therein.

Claims (52)

1. An embolic protection filter comprising:
a filter frame disposable about a guidewire; and an inverted membrane attached to a portion of said filter frame, said inverted membrane having a tapered proximal section and an enlarged diameter distal section.
2. The embolic protection filter of claim 1, wherein said filter frame comprises a first tubular member disposable about the guidewire, and a second tubular member disposable about the guidewire distal the first tubular member.
3. The embolic protection filter of claim 1, wherein a portion of said filter frame is secured to the guidewire.
4. The embolic protection filter of claim 1, wherein said guidewire further includes a distal stop, and wherein the filter frame is slidably and rotationally disposed about the guidewire.
5. The embolic protection filter of claim 1, wherein said inverted membrane is a microporous membrane.
6. The embolic protection filter of claim 5, wherein said microporous membrane is comprised of a polymeric material.
7. The embolic protection filter of claim 6, wherein said polymeric material is selected from the group consisting of polypropylene, polyvinylchloride, polyamide, polyurethane, polyester, polyethylene tetraphlalate, polyether-ether ketone, polyether block amide and polytetrafluoroethylene.
8. The embolic protection filter of claim 1, wherein said inverted membrane comprises a mesh screen.
9. The embolic protection filter of claim 8, wherein said mesh screen is formed of a metal.
10. The embolic protection filter of claim 9, wherein said metal is selected from the group consisting of stainless steel, nickel-titanium alloy and platinum.
11. The embolic protection filter of claim 1, wherein said inverted membrane is substantially conical in shape.
12. The embolic protection filter of claim 1, further comprising a support hoop coupled to a plurality of expandable struts biased to expand in an outward direction with a body lumen.
13. The embolic protection filter of claim 12, wherein said plurality of expandable struts are biased to self-expand within the body lumen.
14. The embolic protection filter of claim 12, wherein said plurality of expandable struts are formed of a metal.
15. The embolic protection filter of claim 14, wherein said metal is nickel-titanium alloy.
16. The embolic protection filter of claim 12, further including a plurality of retrieval struts each having a proximal end and a distal end, the proximal end attached the first tubular member, the distal end attached to the support hoop.
17. The embolic protection filter of claim 12, wherein said support hoop has a pre-formed shape.
18. The embolic protection filter of claim 12, wherein the tapered proximal section of said inverted membrane is disposed proximal the support hoop.
19. The embolic protection filter of claim 1, further comprising a delivery sheath having an inner lumen adapted to contain the embolic protection filter in a collapsed position.
20. An embolic protection filter comprising:
a filter frame disposable about a guidewire;
a support hoop coupled to a plurality of expandable struts, said plurality of expandable struts biased to expand in an outward direction within a body lumen; and an inverted membrane attached to the support hoop and a portion of said filter frame, said inverted membrane having a tapered proximal section and an enlarged diameter distal section.
21. The embolic protection filter of claim 20, wherein said filter frame comprises a first tubular member disposable about the guidewire, and a second tubular member disposable about the guidewire distal the first tubular member.
22. The embolic protection filter of claim 20, further including a plurality of retrieval struts each having a proximal end and a distal end, the proximal end attached the first tubular member, the distal end attached to the support hoop.
23 The embolic protection filter of claim 20, wherein a portion of said filter frame is secured to the guidewire.
24. The embolic protection filter of claim 20, wherein said guidewire further includes a distal stop, and wherein the filter frame is slidably and rotationally disposed about the guidewire.
25. The embolic protection filter of claim 20, wherein said plurality of expandable struts are biased to self-expand within the body lumen.
26. The embolic protection filter of claim 20, wherein said plurality of expandable struts are formed of a metal.
27. The embolic protection filter of claim 26, wherein said metal is nickel-titanium alloy.
28. The embolic protection filter of claim 20, wherein said inverted membrane is a microporous membrane.
29. The embolic protection filter of claim 28, wherein said microporous membrane is comprised of a polymeric material.
30. The embolic protection filter of claim 29, wherein said polymeric material is selected from the group consisting of polypropylene, polyvinylchloride, polyamide, polyurethane, polyester, polyethylene tetraphlalate, polyether-ether ketone, polyether block amide and polytetrafluoroethylene.
31. The embolic protection filter of claim 20, wherein said inverted membrane comprises a mesh screen.
32. The embolic protection filter of claim 31, wherein said mesh screen is formed of a metal.
33. The embolic protection filter of claim 32, wherein said metal is selected from the group consisting of stainless steel, nickel-titanium alloy and platinum.
34. The embolic protection filter of claim 20, wherein said support hoop has a pre-formed shape.
35. The embolic protection filter of claim 20, further comprising a delivery sheath having an inner lumen adapted to contain the embolic protection filter in a collapsed position.
36. The embolic protection filter of claim 20, wherein the tapered proximal section of said inverted membrane is disposed proximal the support hoop.
37. The embolic protection filter of claim 20, wherein said inverted membrane is substantially conical in shape.
38. An embolic protection filter comprising:
a guidewire having a proximal end and a distal end;
a filter frame disposable about the guidewire, said filter frame comprising a first tubular member disposable about the guidewire, and a second tubular member disposable about the guidewire distal the first tubular member;
a support hoop coupled to a plurality of self expanding struts, said plurality of self expanding struts biased to radially expand with a body lumen; and an inverted membrane attached to the support hoop and a portion of said filter frame, said inverted membrane having a tapered proximal section and an enlarged diameter distal section.
39. The embolic protection filter of claim 38, wherein the first tubular member is secured to the guidewire.
40. The embolic protection filter of claim 38, wherein said guidewire further includes a distal stop, and wherein the filter frame is slidably and rotationally disposed about the guidewire.
41. The embolic protection filter of claim 38, wherein said plurality of self-expanding struts are formed of a metal.
42. The embolic protection filter of claim 41, wherein said metal is nickel-titanium alloy.
43. The embolic protection filter of claim 38, wherein said inverted membrane is a microporous membrane.
44. The embolic protection filter of claim 43, wherein said microporous membrane is comprised of a polymeric material.
45. The embolic protection filter of claim 44, wherein said polymeric material is selected from the group consisting of polypropylene, polyvinylchloride, polyamide, polyurethane, polyester, polyethylene tetraphlalate, polyether-ether ketone, polyether block amide and polytetrafluoroethylene.
46. The embolic protection filter of claim 38, wherein said inverted membrane comprises a mesh screen.
47. The embolic protection filter of claim 46, wherein said mesh screen is formed of a metal.
48. The embolic protection filter of claim 47, wherein said metal is selected from the group consisting of stainless steel, nickel-titanium alloy and platinum.
49. The embolic protection filter of claim 38, wherein said support hoop has a pre-formed shape.
50. The embolic protection filter of claim 38, further comprising a delivery sheath having an inner lumen adapted to contain the embolic protection filter in a collapsed position.
51. The embolic protection filter of claim 38, wherein the tapered proximal section of said inverted membrane is disposed proximal the support hoop.
52. The embolic protection filter of claim 38, wherein said inverted membrane is substantially conical in shape.
CA2484867A 2002-05-06 2003-04-15 Inverted embolic protection filter Expired - Fee Related CA2484867C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/139,891 US8070769B2 (en) 2002-05-06 2002-05-06 Inverted embolic protection filter
US10/139,891 2002-05-06
PCT/US2003/011169 WO2003094791A2 (en) 2002-05-06 2003-04-15 Inverted embolic protection filter

Publications (2)

Publication Number Publication Date
CA2484867A1 true CA2484867A1 (en) 2003-11-20
CA2484867C CA2484867C (en) 2011-11-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2484867A Expired - Fee Related CA2484867C (en) 2002-05-06 2003-04-15 Inverted embolic protection filter

Country Status (6)

Country Link
US (1) US8070769B2 (en)
EP (1) EP1503698A2 (en)
JP (1) JP4323422B2 (en)
AU (1) AU2003228496A1 (en)
CA (1) CA2484867C (en)
WO (1) WO2003094791A2 (en)

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US8070769B2 (en) 2011-12-06
CA2484867C (en) 2011-11-29
WO2003094791A3 (en) 2004-03-18
JP4323422B2 (en) 2009-09-02
US20030208224A1 (en) 2003-11-06
AU2003228496A1 (en) 2003-11-11
WO2003094791A2 (en) 2003-11-20
JP2005524486A (en) 2005-08-18

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