CA2563372A1 - Removable vena cava filter with anchoring feature for reduced trauma - Google Patents

Removable vena cava filter with anchoring feature for reduced trauma Download PDF

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Publication number
CA2563372A1
CA2563372A1 CA002563372A CA2563372A CA2563372A1 CA 2563372 A1 CA2563372 A1 CA 2563372A1 CA 002563372 A CA002563372 A CA 002563372A CA 2563372 A CA2563372 A CA 2563372A CA 2563372 A1 CA2563372 A1 CA 2563372A1
Authority
CA
Canada
Prior art keywords
filter
strut
struts
longitudinal axis
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
CA002563372A
Other languages
French (fr)
Other versions
CA2563372C (en
Inventor
Thomas A. Osborne
Arne Molgaard-Nielsen
Per Hendriksen
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.
Thomas A. Osborne
Arne Molgaard-Nielsen
Per Hendriksen
William Cook Europe Aps
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., Thomas A. Osborne, Arne Molgaard-Nielsen, Per Hendriksen, William Cook Europe Aps, Cook Medical Technologies Llc filed Critical Cook, Inc.
Publication of CA2563372A1 publication Critical patent/CA2563372A1/en
Application granted granted Critical
Publication of CA2563372C publication Critical patent/CA2563372C/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
    • A61F2/0103—With centering means
    • 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 (10) for capturing thrombi in a blood vessel. The filter comprises a plurality of struts (12) having first ends attached together along a longitudinal axis (X) of the filter. Each strut has a body member (15) extending from the first end along the longitudinal axis to an anchoring hook (26) defining a strut axis (S). Each strut is configured to move along a strut path (P) relative to the longitudinal axis between an expanded state for engaging with the blood vessel and a collapsed state for filter delivery or retrieval. Each anchoring hook has an angle of up to about 90 degrees relative to the strut axis.

Claims (19)

1. A removable filter for capturing thrombi in a blood vessel, the filter comprising:
a plurality of struts having first ends attached together along a longitudinal axis of the filter, each strut having a body member extending from the first end along the longitudinal axis to an anchoring hook defining a strut axis, each strut being configured to move along a strut path relative to the longitudinal axis between an expanded state for engaging with the blood vessel and a collapsed state for filter delivery or retrieval, each anchoring hook having an angle of up to about 90 degrees relative to the strut axis.
2. The removable filter of claim 1 wherein the plurality of struts is a plurality of primary struts and wherein each anchoring hook extends from the body member along its strut path at about a tangent point of the strut path.
3. The removable filter of claim 2 further comprising:
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 a retrieval hook extending from the hub opposite the plurality of primary struts for removal of the filter from the blood vessel.
4. The removable filter of claim 3 wherein the body member is an arcuate segment including 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.
5. The removable filter of claim 4 wherein the first curved portion is configured to extend radially from the longitudinal axis of the filter and the second curved portion is configured to extend radially toward the longitudinal axis of the filter.
6. The removable filter of claim 4 wherein the anchoring hook includes a planar end face having a cutback that is about parallel with the longitudinal axis.
7. The removable filter of claim 1 wherein each strut is formed of one of the following materials: a superelastic material, stainless steel wire, Nitinol, cobalt-chromium-nickel-molybdenum-iron alloy, and cobalt-chrome alloy.
8. The removable filter of claim 1 wherein the strut path of each strut is between about 20° and 40° from the longitudinal axis of the filter.
9. The removable filter of claim 1 wherein the anchoring hook is configured to be retracted from the blood vessel, avoiding tissue removal from the blood vessel.
10. The removable filter of claim 1 wherein the anchoring hook includes a point in the same direction of blood flow for migration resistance.
11. The removable filter of claim 1 wherein the anchoring hook extends along the tangent of the strut path.
12. The removable filter of claim 1 wherein the anchoring hook includes an end face, the end face being concave for migration resistance.
13. The removable filter of claim 1 wherein the struts are formed of shape memory alloy with a transition temperature.
14. The removable filter of claim 13 wherein the struts collapse to the collapsed state when the temperature of the struts is about equal to or greater than the transition temperature.
15. The removable filter of claim 13 wherein the struts expand to the expanded state when the temperature of the struts is about equal to or greater than the transition temperature.
16. 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.
17. The filter of claim 16 wherein each twisted section includes between about one and ten twists.
18. 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 of the filter, each primary strut having a body member extending from the first end along the longitudinal axis to an anchoring hook defining a strut axis, each primary strut being configured to, move along a strut path relative to the longitudinal axis between an expanded state for engaging with the blood vessel and a collapsed state for filter delivery or retrieval, each anchoring hook extending from the body member along its strut path at about a tangent point of the path and having an angle of up to about 90 degrees relative to the strut axis; and 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.
19. 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 of the filter, each primary strut having a body member extending from the first end along the longitudinal axis to an anchoring hook defining a strut axis, each strut being configured to move along a strut path relative to the longitudinal axis between an expanded state for engaging with the blood vessel and a collapsed state for filter delivery or retrieval, each anchoring hook extending from the body member along its strut path up to a tangent point of the path and having an angle of up to about 90 degrees relative to the strut axis;
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.
CA2563372A 2004-04-16 2005-04-18 Removable vena cava filter with anchoring feature for reduced trauma Active CA2563372C (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US56317604P 2004-04-16 2004-04-16
US56281304P 2004-04-16 2004-04-16
US56290904P 2004-04-16 2004-04-16
US56319204P 2004-04-16 2004-04-16
US60/563,192 2004-04-16
US60/562,909 2004-04-16
US60/562,813 2004-04-16
US60/563,176 2004-04-16
PCT/US2005/013281 WO2005102212A1 (en) 2004-04-16 2005-04-18 Removable vena cava filter with anchoring feature for reduced trauma

Publications (2)

Publication Number Publication Date
CA2563372A1 true CA2563372A1 (en) 2005-11-03
CA2563372C CA2563372C (en) 2012-08-07

Family

ID=34966769

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2563372A Active CA2563372C (en) 2004-04-16 2005-04-18 Removable vena cava filter with anchoring feature for reduced trauma

Country Status (9)

Country Link
US (1) US7972353B2 (en)
EP (1) EP1737385B1 (en)
JP (1) JP4898986B2 (en)
AT (1) ATE491409T1 (en)
AU (1) AU2005235315B2 (en)
CA (1) CA2563372C (en)
DE (1) DE602005025329D1 (en)
DK (1) DK1737385T3 (en)
WO (1) WO2005102212A1 (en)

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EEER Examination request