CA2643942A1 - An improved stent - Google Patents

An improved stent Download PDF

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Publication number
CA2643942A1
CA2643942A1 CA002643942A CA2643942A CA2643942A1 CA 2643942 A1 CA2643942 A1 CA 2643942A1 CA 002643942 A CA002643942 A CA 002643942A CA 2643942 A CA2643942 A CA 2643942A CA 2643942 A1 CA2643942 A1 CA 2643942A1
Authority
CA
Canada
Prior art keywords
serpentine
peak
stent
trough
shaped link
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
CA002643942A
Other languages
French (fr)
Other versions
CA2643942C (en
Inventor
Graig L. Kveen
Timothy G. J. Ehr
Brian J. Brown
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 CA2643942A1 publication Critical patent/CA2643942A1/en
Application granted granted Critical
Publication of CA2643942C publication Critical patent/CA2643942C/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
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • A61F2002/91541—Adjacent bands are arranged out of phase
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155—Adjacent bands being connected to each other
    • A61F2002/91583—Adjacent bands being connected to each other by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band

Abstract

A radially expandable stent comprising a plurality of spaced band-like elements and intersecting links is disclosed. The band-like elements have a generally serpentine configuration to provide continuous waves of generally sinusoidal character to each band-like element. The waves are characterized by a plurality of peaks and troughs taking a generally longitudinal direction along the cylinder such that the waves in the band-like elements open as the stent is expanded from a first diameter to a second diameter. The intersecting links are substantially U-shaped and terminate in first and second shanks. The first shank of a link emanates from a region between a peak and trough on a band-like element and the second shank of the link emanates from a region between a peak and trough on an adjacent band-like element.

Claims (10)

1. A stent comprising a plurality of serpentine segments which form closed paths, the serpentine segments having alternating peaks and troughs, serpentine segments which are adjacent one another connected by a plurality of connectors, each connector having a first end which extends from a first position offset from midway between a peak and a trough on one serpentine segment the first position being closer to midway between the peak and the trough than to the peak, a second end which extends from a second position offset from midway between a peak and a trough on an adjacent serpentine segment, the second position being closer to midway between the peak and the trough than to the trough, and a central region between the first and second ends, at least a portion of each central region comprising a first U-shaped link and a second U-shaped link, each first U-shaped link opening in a first substantially circumferential direction and each second U-shaped link opening in a second substantially circumferential direction substantially opposite the first substantially circumferential direction, at least a portion of the first U-shaped link and at least a portion of the second U-shaped link having a shared portion, the shared portion disposed between one of the peaks on one segment and one of the troughs on an adjacent segment.
2. The stent of claim 1 wherein each peak of a serpentine band is substantially longitudinally aligned with a trough of an adjacent serpentine band.
3. The stent of claim 2 wherein the connectors and portions of the serpentine band are arranged to form substantially helical pathways along the stent.
4. The stent of claim 1 wherein the connectors and portions of the serpentine bands are arranged to form substantially helical pathways along the stent, each portion extending in a region between a peak and a trough which is bounded by two connectors.
5. A stent comprising a plurality of serpentine segments which form closed paths, and a plurality of connectors connecting the serpentine segments, each connector comprising a first bend and a second bend, the first and second bends oriented in substantially opposite directions, each serpentine segment comprising a plurality of peaks and troughs, the serpentine segments and connectors arranged to form a plurality of helical pathways extending along the stent, each helical pathway extending along a plurality of successive connectors, successive connectors joined together by a portion of a serpentine segment, the portion extending from a first position along a serpentine segment to a second position along a serpentine segment, the first and second positions located between one trough and one peak, the first and second positions being closer to a midpoint between the peak and the trough than to the peak and trough, the portion traversing the midpoint.
6. The stent of claim 5 wherein each peak of a serpentine band is substantially longitudinally aligned with a trough of an adjacent serpentine band.
7. The stent of claim 5 wherein the first bend and the second bend are each substantially U-shape.
8. A tubular stent comprising a plurality of serpentine bands which form closed paths about a circumference of the stent, the serpentine bands having alternating peaks and troughs, the peaks of one serpentine band being out of phase an intermediate angle between 0 and 180 degrees with the peaks of an adjacent band, serpentine bands which are adjacent one another connected by at least one connector, the at least one connector having at least one bend therein and having a first end and a second end, the first end extending from a serpentine band at a position closer to midway between the peak and the trough than to the peak, the second end extending from an adjacent serpentine band at a position closer to midway between the peak and the trough than to the peak, the at least one connector comprising a central region between the first and second ends, at least a portion of each central region comprising a first U-shaped link and a second U-shaped link, each first U-shaped link opening in a first substantially circumferential direction and each second U-shaped link opening in a second substantially circumferential direction substantially opposite the first substantially circumferential direction, at least a portion of the first U-shaped link and at least a portion of the second U-shaped link having a shared portion, the shared portion disposed between one of the peaks on one segment and one of the troughs on an adjacent segment.
9. The stent of claim 8 comprising a plurality of connectors.
10. The stent of claim 9 wherein a series of connectors forms a spiral shape around the circumference of the stent.
CA2643942A 1998-07-08 1999-07-02 An improved stent Expired - Fee Related CA2643942C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/111,531 US6261319B1 (en) 1998-07-08 1998-07-08 Stent
US09/111,531 1998-07-08
CA002335010A CA2335010C (en) 1998-07-08 1999-07-02 An improved stent

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002335010A Division CA2335010C (en) 1998-07-08 1999-07-02 An improved stent

Publications (2)

Publication Number Publication Date
CA2643942A1 true CA2643942A1 (en) 2000-01-20
CA2643942C CA2643942C (en) 2011-06-14

Family

ID=22339057

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002335010A Expired - Fee Related CA2335010C (en) 1998-07-08 1999-07-02 An improved stent
CA2643942A Expired - Fee Related CA2643942C (en) 1998-07-08 1999-07-02 An improved stent

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA002335010A Expired - Fee Related CA2335010C (en) 1998-07-08 1999-07-02 An improved stent

Country Status (8)

Country Link
US (9) US6261319B1 (en)
EP (2) EP1477135B1 (en)
JP (1) JP2002520089A (en)
AT (2) ATE359042T1 (en)
CA (2) CA2335010C (en)
DE (2) DE69935813T2 (en)
DK (1) DK1094764T3 (en)
WO (1) WO2000002502A1 (en)

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US20060149356A1 (en) 2006-07-06
CA2335010A1 (en) 2000-01-20
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US20050021130A1 (en) 2005-01-27
US8668731B2 (en) 2014-03-11
US20030055489A1 (en) 2003-03-20
EP1477135A3 (en) 2004-12-22
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