CA2562746A1 - Removable vena cava filter having inwardly positioned anchoring hooks in collapsed configuration - Google Patents

Removable vena cava filter having inwardly positioned anchoring hooks in collapsed configuration Download PDF

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Publication number
CA2562746A1
CA2562746A1 CA002562746A CA2562746A CA2562746A1 CA 2562746 A1 CA2562746 A1 CA 2562746A1 CA 002562746 A CA002562746 A CA 002562746A CA 2562746 A CA2562746 A CA 2562746A CA 2562746 A1 CA2562746 A1 CA 2562746A1
Authority
CA
Canada
Prior art keywords
filter
struts
longitudinal axis
primary
blood vessel
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
CA002562746A
Other languages
French (fr)
Other versions
CA2562746C (en
Inventor
Thomas A. Osborne
Arne Molgaard-Nielsen
Per Hendriksen
Allan Hemmingsen
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.)
Cook Medical Technologies LLC
Original Assignee
Cook, Inc.
William Cook Europe Aps
Thomas A. Osborne
Arne Molgaard-Nielsen
Per Hendriksen
Allan Hemmingsen
Cook Medical Technologies Llc
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 Cook, Inc., William Cook Europe Aps, Thomas A. Osborne, Arne Molgaard-Nielsen, Per Hendriksen, Allan Hemmingsen, Cook Medical Technologies Llc filed Critical Cook, Inc.
Publication of CA2562746A1 publication Critical patent/CA2562746A1/en
Application granted granted Critical
Publication of CA2562746C publication Critical patent/CA2562746C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A61F2/0105—Open ended, i.e. legs gathered only at one side
    • 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
    • A61F2/011—Instruments for their placement or removal
    • 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
    • A61F2002/016—Filters implantable into blood vessels made from wire-like elements
    • 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
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
    • A61F2002/8483—Barbs
    • 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
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/005—Rosette-shaped, e.g. star-shaped
    • 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
    • A61F2230/0073—Quadric-shaped
    • A61F2230/008—Quadric-shaped paraboloidal

Abstract

The present invention involves a removable filter for capturing thrombi in a blood vessel. The filter comprises a plurality of primary struts and a plurality of secondary struts. The plurality of primary struts has first ends attached together along a longitudinal axis. Each primary strut has an arcuate segment extending from the first end to an anchoring hook. The primary struts are configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery. Each primary strut is configured to cross another primary strut along the longitudinal axis in the collapsed state such that each anchoring hook faces the longitudinal axis away from the blood vessel for filter retrieval or delivery. The plurality of secondary struts has connected ends attached together along the longitudinal axis. The secondary struts extend therefrom to free ends to centralize the filter in the expanded in the blood vessel.

Claims (20)

1. A removable filter for capturing thrombi in a blood vessel, the filter comprising:
a plurality of primary struts having first ends attached together along a longitudinal axis, each primary strut having an arcuate segment extending from the first end to an anchoring hook, the primary struts being configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery, each primary strut being configured to cross another primary strut along the longitudinal axis in the collapsed state such that each anchoring hook is inwardly positioned along the longitudinal axis away from the blood vessel for filter retrieval or delivery.
2. The removable filter of claim 1 .further comprising:
a plurality of secondary struts having connected ends attached together along the longitudinal axis and extending therefrom to free ends to centralize the filter in the expanded state in the blood vessel;
a hub configured to axially house the first ends of the plurality of primary struts; and a retrieval hook extending from the hub opposite the plurality of primary struts for removal of the filter from the blood vessel.
3. The removable filter of claim 1 wherein the arcuate segment includes a first curved portion and a second curved portion, the first curved portion extending from the first end, the second curved portion extending from the first curved portion and terminating at the anchoring hook.
4. The removable filter of claim 3 wherein the first curved portion is configured to extend from the longitudinal axis of the filter and the second curved portion is configured to extend radially toward the longitudinal axis of the filter.
5. The removable filter of claim 3 wherein the first and second curved portions are configured to have a non-parallel relationship with the longitudinal axis of the filter.
6. The removable filter of claim 1 wherein each primary strut is formed of a superelastic material, stainless steel wire, Nitinol, cobalt-chromium-nickel-molybdenum-iron alloy, or cobalt-chrome alloy.
7. The removable filter of claim 2 wherein each secondary strut is formed of a superelastic material, stainless steel wire, Nitinol, cobalt-chromium-nickel-molybdenum-iron alloy, or cobalt-chrome alloy.
8. The filter of claim 1 wherein pairs of secondary struts are positioned between pairs of primary struts, each pair of secondary struts being twisted about each other near the connected ends of the respective secondary struts to form a twisted section.
9. The filter of claim 8 wherein each twisted section includes between about one and ten twists.
10. The removable filter of claim 1 wherein the struts are formed of shape memory alloy with a transition temperature.
11. The removable filter of claim 10 wherein the struts collapse to the collapsed state when the temperature of the struts is about equal to or greater than the transition temperature.
12. The removable filter of claim 10 wherein the struts expand to the expanded state when the temperature of the struts is about equal to or greater than the transition temperature.
13. A removable filter for capturing thrombi in a blood vessel, the filter comprising:
a plurality of primary struts having first ends attached together along a longitudinal axis, each primary strut having an arcuate segment, each arcuate segment having a first curved portion extending from the first end and a second curved portion extending from the first curved portion to an anchoring hook, the primary struts being configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery, each primary strut being configured to cross another primary strut along the longitudinal axis in the collapsed state such that each anchoring hook is inwardly positioned along the longitudinal axis away from the blood vessel for filter retrieval or delivery;
a plurality of secondary struts having connected ends attached together along the longitudinal axis, each secondary strut having a first arc extending from the connected end and a second arc extending from the first arc to a free end, the second arc being configured to engage the blood vessel to centralize the filter in the expanded state in the blood vessel;
a hub configured to axially house the first ends of the plurality of primary struts and the connected ends of the secondary struts; and a retrieval hook extending from the hub opposite the plurality of primary struts for removal of the filter from the blood vessel.
14. The removable filter of claim 13 wherein the first curved portion is configured to extend from the longitudinal axis of the filter and the second curved portion is configured to extend radially toward the longitudinal axis of the filter.
15. The removable filter of claim 13 wherein each primary strut is formed of a superelastic material, stainless steel wire, Nitinol, cobalt-chromium-nickel-molybdenum-iron alloy, or cobalt chrome-alloy.
16. The removable filter of claim 13 wherein each secondary strut is formed of a superelastic material, stainless steel wire, Nitinol, cobalt-chromium-nickel-molybdenum-iron alloy, or cobalt chrome-alloy.
17. The removable filter of claim 13 wherein the struts are formed of shape memory alloy with a transition temperature.
18. The removable filter of claim 17 wherein the struts collapse to the collapsed state when the temperature of the struts is about equal to or greater than the transition temperature.
19. The removable filter of claim 17 wherein the struts expand to the expanded state when the temperature of the struts is about equal to or greater than the transition temperature.
20. A removable filter for capturing thrombi in a blood vessel, the filter comprising:
a plurality of primary struts having first ends attached together along a longitudinal axis, each primary strut having an arcuate segment extending from the first end to an anchoring hook, the primary struts being configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery, each primary strut being configured to cross another primary strut along the longitudinal axis in the collapsed state such that each anchoring hook is inwardly positioned along the longitudinal axis away from the blood vessel for filter retrieval or delivery, the anchoring hooks in the expanded state defining a first axial portion; and a plurality of secondary struts having connected ends attached together along the longitudinal axis and extending therefrom to free ends to centralize the filter in the expanded state in the blood vessel, the secondary struts in the expanded state defining a second axial portion spaced from the first axial portion to centralize the filter in the blood vessel.
CA2562746A 2004-04-16 2005-04-18 Removable vena cava filter having inwardly positioned anchoring hooks in collapsed configuration Active CA2562746C (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US56317104P 2004-04-16 2004-04-16
US56281304P 2004-04-16 2004-04-16
US56317604P 2004-04-16 2004-04-16
US56290904P 2004-04-16 2004-04-16
US60/562,909 2004-04-16
US60/563,171 2004-04-16
US60/562,813 2004-04-16
US60/563,176 2004-04-16
PCT/US2005/013323 WO2005102214A1 (en) 2004-04-16 2005-04-18 Removable vena cava filter having inwardly positioned anchoring hooks in collapsed configuration

Publications (2)

Publication Number Publication Date
CA2562746A1 true CA2562746A1 (en) 2005-11-03
CA2562746C CA2562746C (en) 2012-06-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2562746A Active CA2562746C (en) 2004-04-16 2005-04-18 Removable vena cava filter having inwardly positioned anchoring hooks in collapsed configuration

Country Status (10)

Country Link
US (1) US8043322B2 (en)
EP (1) EP1737384B1 (en)
JP (1) JP4918637B2 (en)
AT (1) ATE447903T1 (en)
AU (1) AU2005234753B2 (en)
CA (1) CA2562746C (en)
DE (1) DE602005017599D1 (en)
DK (1) DK1737384T3 (en)
ES (1) ES2335903T3 (en)
WO (1) WO2005102214A1 (en)

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US8043322B2 (en) 2011-10-25
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US20070005095A1 (en) 2007-01-04
AU2005234753A1 (en) 2005-11-03
CA2562746C (en) 2012-06-05
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ATE447903T1 (en) 2009-11-15
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AU2005234753B2 (en) 2010-12-02
DE602005017599D1 (en) 2009-12-24

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