CA2567302A1 - Stent having struts with reverse direction curvature - Google Patents
Stent having struts with reverse direction curvature Download PDFInfo
- Publication number
- CA2567302A1 CA2567302A1 CA002567302A CA2567302A CA2567302A1 CA 2567302 A1 CA2567302 A1 CA 2567302A1 CA 002567302 A CA002567302 A CA 002567302A CA 2567302 A CA2567302 A CA 2567302A CA 2567302 A1 CA2567302 A1 CA 2567302A1
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- CA
- Canada
- Prior art keywords
- stent
- strut
- struts
- loop
- stent according
- 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.)
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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
- A61F2/90—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
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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
- A61F2002/91525—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
-
- 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
- A61F2002/9155—Adjacent bands being connected to each other
- A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
-
- 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
- A61F2230/0054—V-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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
Abstract
Disclosed is a stent having struts with reverse direction curvature for providing a reduced compressed profile and an increased expanded profile. The strut configuration comprises a plurality of arcuate sections facing in opposite convex and a concave orientation. The strut width may be gradually decreased from its ends towards the strut's mid-section to redistribute maximal strains away from portions of the stent more susceptible to permanent deformation, such as the loop portions. Varying strut lengths to offset the maximum circumferential widths of adjacent portions of the stent may further reduce the compressed stent profile. The varied stent lengths may also contribute to an increased expanded stent profile. Stents with the reverse direction curvature strut design can obtain an expanded to compressed stent diameter ratio of about 7:1 compared to conventional stents that have a ratio of up to about 5:1. The curved strut can be utilized with any stent design.
Claims (31)
1. A stent, comprising:
a plurality of interconnected circumferential bands defining a cylindrical structure having a longitudinal axis;
each of the circumferential bands having a generally serpentine pattern and comprising a plurality of struts and a plurality of loops, wherein each end of a strut is coupled to an end of a loop; and at least one of the circumferential bands having at least two struts comprising a plurality of arcuate sections, wherein each arcuate section in the strut has an opposite curvature to that of an adjacent arcuate section in the strut.
a plurality of interconnected circumferential bands defining a cylindrical structure having a longitudinal axis;
each of the circumferential bands having a generally serpentine pattern and comprising a plurality of struts and a plurality of loops, wherein each end of a strut is coupled to an end of a loop; and at least one of the circumferential bands having at least two struts comprising a plurality of arcuate sections, wherein each arcuate section in the strut has an opposite curvature to that of an adjacent arcuate section in the strut.
2. The stent according to claim 1, wherein the plurality of arcuate sections in the strut substantially straighten and extend when the stent is compressed.
3. The stent according to claim 1, wherein each strut with arcuate sections has a cross-sectional area that gradually decreases in opposing directions from the ends of the strut, the ends of the strut having greater cross-sectional area than the mid-section of the strut.
4. The stent according to claim 1, wherein said stent is self-expanding.
5. The stent according to claim 1, wherein said stent is balloon-expandable.
6. The stent according to claim 1, wherein the width of the loop is greater than the width of the strut.
7. The stent according to claim 4, wherein the stent has an expanded to compressed outside diameter ratio of greater than about 5:1.
8. The stent according to claim 4, wherein the stent has an expanded to compressed outside diameter ratio of about 7:1.
9. The stent according to claim 1, wherein maximal strain imparted on the stent when the stent is compressed is distributed toward the mid-section of the struts.
10. The stent according to claim 1, wherein said at least one circumferential band includes at least one set of two struts with arcuate sections coupled to the ends of one loop, said set of loop and struts having a maximum circumferential width when the stent is compressed, the maximum circumferential width of each set of loop and struts being offset along the longitudinal axis from maximum circumferential widths of adjacent sets of loop and struts when the stent is compressed.
11. The stent according to claim 10, wherein the maximum circumferential widths of adjacent sets of loop and struts are offset along the longitudinal axis by varying the lengths of the struts.
12. A stent, comprising:
a plurality of interconnected circumferential bands defining a cylindrical structure having a longitudinal axis;
each of the circumferential bands having a generally serpentine pattern and comprising a plurality of struts and a plurality of loops, wherein each end of a loop is coupled to an end of two adjacent struts; and at least one circumferential band having struts comprising a plurality of arcuate sections, wherein each arcuate section in the strut has an opposite curvature to that of an adjacent arcuate section in the strut and each strut has a varying width wherein the width at ends of the strut are larger than the width of the remainder of the strut.
a plurality of interconnected circumferential bands defining a cylindrical structure having a longitudinal axis;
each of the circumferential bands having a generally serpentine pattern and comprising a plurality of struts and a plurality of loops, wherein each end of a loop is coupled to an end of two adjacent struts; and at least one circumferential band having struts comprising a plurality of arcuate sections, wherein each arcuate section in the strut has an opposite curvature to that of an adjacent arcuate section in the strut and each strut has a varying width wherein the width at ends of the strut are larger than the width of the remainder of the strut.
13. The stent according to claim 12, wherein the plurality of arcuate sections in the struts substantially straighten and extend when the stent is compressed.
14. The stent according to claim 12, wherein each strut with arcuate sections has a cross-sectional area that gradually decreases in opposing directions from the ends of the strut, the ends of the strut having greater cross-sectional area than the mid-section of the strut.
15. The stent according to claim 12, wherein said stent is self-expanding.
16. The stent according to claim 12, wherein said stent is balloon-expandable.
17. The stent according to claim 12, wherein said loop is wider than said strut.
18. The stent according to claim 15, wherein the stent has an expanded to compressed outside diameter ratio of greater than about 5:1.
19. The stent according to claim 15, wherein the stent has an expanded to compressed outer diameter ratio of about 7:1.
20. The stent according to claim 12, wherein said at least one circumferential band comprises a multiplicity of sets of two adjacent struts coupled to the ends of a loop, each set of loop and struts having a maximum circumferential width when the stent is compressed, the maximum circumferential widths of adjacent sets of loop and struts being offset along the longitudinal axis when the stent is compressed.
21. The stent according to claim 20, wherein the maximum circumferential widths of adjacent sets of loop and struts are offset along the longitudinal axis by varying the lengths of the struts.
22. A stent defining a cylindrical structure having a longitudinal axis comprising a plurality of cells, each of the plurality of cells comprising:
a first circumferential section having a generally serpentine pattern and comprising a plurality of struts and at least one loop, the struts and loops forming at least one set of two struts coupled to the ends of one loop;
a second circumferential section having a generally serpentine pattern and comprising a plurality of struts and at least one loop; and at least one of the sets of the first circumferential section having two struts comprising a plurality of arcuate sections, wherein each arcuate section has an opposite curvature to that of an adjacent arcuate section, and each strut has a varying width wherein the width at ends of the strut are larger than the width of the remainder of the strut and the loop has a greater width than the strut.
a first circumferential section having a generally serpentine pattern and comprising a plurality of struts and at least one loop, the struts and loops forming at least one set of two struts coupled to the ends of one loop;
a second circumferential section having a generally serpentine pattern and comprising a plurality of struts and at least one loop; and at least one of the sets of the first circumferential section having two struts comprising a plurality of arcuate sections, wherein each arcuate section has an opposite curvature to that of an adjacent arcuate section, and each strut has a varying width wherein the width at ends of the strut are larger than the width of the remainder of the strut and the loop has a greater width than the strut.
23. The stent according to claim 22, wherein the plurality of arcuate strut sections substantially straighten when the stent is compressed.
24. The stent according to claim 22, wherein each strut with arcuate sections has a cross-sectional area that gradually decreases in opposing directions from the ends of the strut, the ends of the strut having greater cross-sectional area than the mid-section of the strut.
25. The stent according to claim 22, wherein the stent is self-expanding.
26. The stent according to claim 22, wherein said stent is balloon-expandable.
27. The stent according to claim 22, wherein said loop is wider than said strut.
28. The stent according to claim 25, wherein the stent has an expanded to compressed outside diameter ratio of greater than about 5:1.
29. The stent according to claim 25, wherein the stent has an expanded to compressed outside diameter ratio of about 7:1.
30. The stent according to claim 22, wherein each set of loop and struts in the first circumferential section has a maximum circumferential width when the stent is compressed, the maximum circumferential width of each set of loop and struts being offset along the longitudinal axis from maximum circumferential widths of adjacent sets of loop and struts when the stent is compressed.
31. The stent according to claim 30, wherein the maximum circumferential widths of adjacent sets of loop and struts are offset along the longitudinal axis by varying the lengths of the struts.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/864,685 US7763064B2 (en) | 2004-06-08 | 2004-06-08 | Stent having struts with reverse direction curvature |
US10/864,685 | 2004-06-08 | ||
PCT/IB2005/001569 WO2005120394A2 (en) | 2004-06-08 | 2005-06-03 | Stent having struts with reverse direction curvature |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2567302A1 true CA2567302A1 (en) | 2005-12-22 |
CA2567302C CA2567302C (en) | 2012-10-09 |
Family
ID=35450043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2567302A Expired - Fee Related CA2567302C (en) | 2004-06-08 | 2005-06-03 | Stent having struts with reverse direction curvature |
Country Status (8)
Country | Link |
---|---|
US (1) | US7763064B2 (en) |
EP (1) | EP1753368B1 (en) |
JP (1) | JP4580987B2 (en) |
AU (1) | AU2005251525B2 (en) |
CA (1) | CA2567302C (en) |
ES (1) | ES2425841T3 (en) |
IL (1) | IL179506A (en) |
WO (1) | WO2005120394A2 (en) |
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AU2005251525A1 (en) | 2005-12-22 |
AU2005251525B2 (en) | 2009-05-21 |
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IL179506A (en) | 2012-03-29 |
US20050273157A1 (en) | 2005-12-08 |
WO2005120394A3 (en) | 2006-05-18 |
ES2425841T3 (en) | 2013-10-17 |
EP1753368A4 (en) | 2008-05-14 |
WO2005120394A2 (en) | 2005-12-22 |
JP4580987B2 (en) | 2010-11-17 |
EP1753368B1 (en) | 2013-08-07 |
EP1753368A2 (en) | 2007-02-21 |
JP2008501461A (en) | 2008-01-24 |
CA2567302C (en) | 2012-10-09 |
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