CA2493719A1 - Helical stent having improved flexibility and expandability - Google Patents
Helical stent having improved flexibility and expandability Download PDFInfo
- Publication number
- CA2493719A1 CA2493719A1 CA002493719A CA2493719A CA2493719A1 CA 2493719 A1 CA2493719 A1 CA 2493719A1 CA 002493719 A CA002493719 A CA 002493719A CA 2493719 A CA2493719 A CA 2493719A CA 2493719 A1 CA2493719 A1 CA 2493719A1
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- Prior art keywords
- undulations
- struts
- transition
- stent
- stent according
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- 230000007704 transition Effects 0.000 claims abstract 22
- 238000004804 winding Methods 0.000 claims abstract 20
- 230000037431 insertion Effects 0.000 claims 6
- 238000003780 insertion Methods 0.000 claims 6
- 239000000463 material Substances 0.000 claims 1
- 239000011295 pitch Substances 0.000 claims 1
Classifications
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- 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
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
- A61F2002/91525—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 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
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- 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
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- 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
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- 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
- A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
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- 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
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- 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
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- 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
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Abstract
A stent includes a central portion of helically wound undulations formed of struts, cylindrical end portions, and transition zones between the helical portion and the cylindrical portions. According to a first aspect of the invention, the torsional flexibility of the stent is maximized by having bridges connecting adjacent winding be interrupted by the maximum possible number of undulations. In a preferred design, each winding includes nineteen undulations around the circumference, bridges are provided every five undulations. According to a second aspect of the invention, uniform opening of the transition zone is achieved by altering the width, and thereby the flexibility, of a series of struts in accordance with their lengths. Specifically, the long transition zone struts are made wider.
Claims (11)
1. A stent for insertion into a vessel of a patient, comprising:
a tubular member having a first smaller diameter for insertion into the vessel, and a second larger diameter for deployment within the vessel, said tubular member including a central portion comprised of a plurality of helical circumferential windings separated by a helical space, each of said windings including a plurality of undulations, with each said undulation being defined by two adjacent struts and a loop connecting the struts, wherein adjacent windings are connected with a plurality of bridges, said bridges extending across said helical space between said adjacent winding and connected to said loops of a plurality of said undulations, and further wherein a same number of struts is traversed from any one bridge to a next bridge on each of said windings when traveling in either a right-handed or left-handed direction along each of said windings.
a tubular member having a first smaller diameter for insertion into the vessel, and a second larger diameter for deployment within the vessel, said tubular member including a central portion comprised of a plurality of helical circumferential windings separated by a helical space, each of said windings including a plurality of undulations, with each said undulation being defined by two adjacent struts and a loop connecting the struts, wherein adjacent windings are connected with a plurality of bridges, said bridges extending across said helical space between said adjacent winding and connected to said loops of a plurality of said undulations, and further wherein a same number of struts is traversed from any one bridge to a next bridge on each of said windings when traveling in either a right-handed or left-handed direction along each of said windings.
2. A stent according to claim 1, wherein:
said loops of said undulations on adjacent windings are interdigitated.
said loops of said undulations on adjacent windings are interdigitated.
3. A stent according to claim 2, wherein:
said bridges extend between loops located one and one-half pitches away.
said bridges extend between loops located one and one-half pitches away.
4. A stent according to claim 1, wherein:
said central portion of said stent includes sixteen to twenty undulations.
said central portion of said stent includes sixteen to twenty undulations.
5. A stent according to claim 4, wherein:
said central portion of said stent includes eighteen to nineteen undulations.
said central portion of said stent includes eighteen to nineteen undulations.
6. A stent according to claim 1, wherein:
each winding includes three to five bridges extending therefrom.
each winding includes three to five bridges extending therefrom.
7. A stent according to claim 1, wherein:
each of said bridges in said central portion extends in a game direction in a cylindrical plane of said stent.
each of said bridges in said central portion extends in a game direction in a cylindrical plane of said stent.
8. A scent according to claim 7, wherein:
each of said bridges extends longitudinally crosswise across said helical space.
each of said bridges extends longitudinally crosswise across said helical space.
9. A stent according to claim 1, wherein:
said tubular member is self-expanding from said first diameter to said second diameter.
said tubular member is self-expanding from said first diameter to said second diameter.
10. A stent according to claim 1, wherein:
said tubular member is a laser cut tube.
said tubular member is a laser cut tube.
11. A stent according to claim 1, wherein:
said tubular member is made from a superelastic material.
11. A stent according to claim 1, wherein:
said tubular member includes cylindrical end portions, and a transition zone between said central portion and each of said end portions, said transition zone including a plurality of transition undulations having struts that progressively increase in length, wherein a relatively longer strut of said transition undulations has a relatively wider width than a relatively shorter strut of said transition undulations.
13. A stent for insertion into a vessel of a patient, comprising;
a tubular member having a first smaller diameter for insertion into the vessel, and a second larger diameter for deployment within the vessel, said tubular member including a central portion comprised of a plurality of helical circumferential windings separated by a helical space, each of said windings including a plurality of undulations, with each said undulation being defined by two adjacent struts and a loop connecting the struts, wherein adjacent windings are connected with a plurality of bridges, said bridges extending across said helical space between said adjacent winding and connected to said loops of a plurality of said undulations, wherein, for at least one of said windings, for any given number n of undulations on said winding and any given number b of bridges connected to said winding, where n#b, a maximum number of undulations is provided between said bridges.
14. A stent according to claim 13, wherein;
said undulations on adjacent windings are interdigitated.
15. A stent for insertion into a vessel of a patient, comprising:
a tubular member having a first smaller diameter for insertion into the vessel, and a second larger diameter for deployment within the vessel, and defining a longitudinal axis, said tubular member including a central potion comprised of a plurality of helical circumferential windings separated by a helical space, each of said windings including a plurality of undulations, with each said undulation being defined by two adjacent struts and a loop connecting said struts, at least one cylindrical end portion at an end of said central portion, and a transition zones between said central portion and each of said cylindrical end portions, said transition zone including a plurality of transition undulations having struts that progressively increase in length, wherein a relatively longer strut of said transition undulations has a relatively wider width than a relatively shorter strut of said transition undulations.
16. A stent according to claim 15, wherein:
said tubular member has a longitudinal axis and adjacent struts of said transition zone are defined as a pair of struts, said transition zone having a plurality of said pairs, and when said stent has said first smaller diameter, said struts of said central portion and said transition zone all extend substantially parallel to said longitudinal axis, and when said stent has said second larger diameter, an angle is defined between said struts of each said pair of struts, and said angle is substantially the same for each said pair of struts.
17. A stent according to claim 15, wherein:
said longest strut of said transition undulations is 1.19 to 1.99 times wider than said shortest strut of said transition undulations.
18. A stent according to claim 25, wherein:
said longest strut of said transition undulations is approximately 1.59 times wider than said shortest strut of said transition undulations.
19. A stent according to claim 15, wherein:
said at least one cylindrical end portion is two cylindrical end portions.
20. A stent according to claim 15, wherein:
said struts of said central portion are all of a common length and width.
21. A stent according to claim 15, wherein:
said common length of said struts of said central portion is shorter than a shortest length of said struts of said transition undulations, and said common width of said struts of said central portion is narrower than a narrowest width of said struts of said transition undulations,
said tubular member is made from a superelastic material.
11. A stent according to claim 1, wherein:
said tubular member includes cylindrical end portions, and a transition zone between said central portion and each of said end portions, said transition zone including a plurality of transition undulations having struts that progressively increase in length, wherein a relatively longer strut of said transition undulations has a relatively wider width than a relatively shorter strut of said transition undulations.
13. A stent for insertion into a vessel of a patient, comprising;
a tubular member having a first smaller diameter for insertion into the vessel, and a second larger diameter for deployment within the vessel, said tubular member including a central portion comprised of a plurality of helical circumferential windings separated by a helical space, each of said windings including a plurality of undulations, with each said undulation being defined by two adjacent struts and a loop connecting the struts, wherein adjacent windings are connected with a plurality of bridges, said bridges extending across said helical space between said adjacent winding and connected to said loops of a plurality of said undulations, wherein, for at least one of said windings, for any given number n of undulations on said winding and any given number b of bridges connected to said winding, where n#b, a maximum number of undulations is provided between said bridges.
14. A stent according to claim 13, wherein;
said undulations on adjacent windings are interdigitated.
15. A stent for insertion into a vessel of a patient, comprising:
a tubular member having a first smaller diameter for insertion into the vessel, and a second larger diameter for deployment within the vessel, and defining a longitudinal axis, said tubular member including a central potion comprised of a plurality of helical circumferential windings separated by a helical space, each of said windings including a plurality of undulations, with each said undulation being defined by two adjacent struts and a loop connecting said struts, at least one cylindrical end portion at an end of said central portion, and a transition zones between said central portion and each of said cylindrical end portions, said transition zone including a plurality of transition undulations having struts that progressively increase in length, wherein a relatively longer strut of said transition undulations has a relatively wider width than a relatively shorter strut of said transition undulations.
16. A stent according to claim 15, wherein:
said tubular member has a longitudinal axis and adjacent struts of said transition zone are defined as a pair of struts, said transition zone having a plurality of said pairs, and when said stent has said first smaller diameter, said struts of said central portion and said transition zone all extend substantially parallel to said longitudinal axis, and when said stent has said second larger diameter, an angle is defined between said struts of each said pair of struts, and said angle is substantially the same for each said pair of struts.
17. A stent according to claim 15, wherein:
said longest strut of said transition undulations is 1.19 to 1.99 times wider than said shortest strut of said transition undulations.
18. A stent according to claim 25, wherein:
said longest strut of said transition undulations is approximately 1.59 times wider than said shortest strut of said transition undulations.
19. A stent according to claim 15, wherein:
said at least one cylindrical end portion is two cylindrical end portions.
20. A stent according to claim 15, wherein:
said struts of said central portion are all of a common length and width.
21. A stent according to claim 15, wherein:
said common length of said struts of said central portion is shorter than a shortest length of said struts of said transition undulations, and said common width of said struts of said central portion is narrower than a narrowest width of said struts of said transition undulations,
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PCT/EP2003/009570 WO2004019818A2 (en) | 2002-08-30 | 2003-08-26 | Helical stent having improved flexibility and expandability |
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CA2493719C CA2493719C (en) | 2010-11-23 |
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CA2493719A Expired - Lifetime CA2493719C (en) | 2002-08-30 | 2003-08-26 | Helical stent having improved flexibility and expandability |
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EP (4) | EP1531760B1 (en) |
JP (1) | JP4044092B2 (en) |
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CA (1) | CA2493719C (en) |
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2002
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-
2003
- 2003-08-26 WO PCT/EP2003/009570 patent/WO2004019818A2/en active Application Filing
- 2003-08-26 CA CA2493719A patent/CA2493719C/en not_active Expired - Lifetime
- 2003-08-26 EP EP03790935.5A patent/EP1531760B1/en not_active Expired - Lifetime
- 2003-08-26 JP JP2004532137A patent/JP4044092B2/en not_active Expired - Lifetime
- 2003-08-26 EP EP10177855.3A patent/EP2255750B1/en not_active Expired - Lifetime
- 2003-08-26 EP EP16186101.8A patent/EP3115021B1/en not_active Expired - Lifetime
- 2003-08-26 AU AU2003260471A patent/AU2003260471A1/en not_active Abandoned
- 2003-08-26 EP EP12155323.4A patent/EP2465475B1/en not_active Expired - Lifetime
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2005
- 2005-03-08 US US11/074,806 patent/US8512391B2/en active Active
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2009
- 2009-05-13 US US12/465,354 patent/US8038707B2/en not_active Expired - Lifetime
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2013
- 2013-08-19 US US13/970,474 patent/US9554927B2/en active Active
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EP2465475A2 (en) | 2012-06-20 |
CA2493719C (en) | 2010-11-23 |
US9554927B2 (en) | 2017-01-31 |
US10463509B2 (en) | 2019-11-05 |
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EP3115021B1 (en) | 2018-02-28 |
JP4044092B2 (en) | 2008-02-06 |
US20170086994A1 (en) | 2017-03-30 |
US20130338759A1 (en) | 2013-12-19 |
EP2255750A2 (en) | 2010-12-01 |
US6878162B2 (en) | 2005-04-12 |
JP2005536304A (en) | 2005-12-02 |
US8038707B2 (en) | 2011-10-18 |
EP2465475B1 (en) | 2016-10-12 |
US20040044401A1 (en) | 2004-03-04 |
EP3115021A1 (en) | 2017-01-11 |
EP1531760B1 (en) | 2014-04-23 |
AU2003260471A1 (en) | 2004-03-19 |
EP1531760A2 (en) | 2005-05-25 |
US20050159807A1 (en) | 2005-07-21 |
US8512391B2 (en) | 2013-08-20 |
EP2255750A3 (en) | 2011-11-30 |
US20090264986A1 (en) | 2009-10-22 |
EP2255750B1 (en) | 2014-11-26 |
WO2004019818A3 (en) | 2004-05-06 |
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