CA2234589A1 - Expandable stent - Google Patents

Expandable stent Download PDF

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Publication number
CA2234589A1
CA2234589A1 CA 2234589 CA2234589A CA2234589A1 CA 2234589 A1 CA2234589 A1 CA 2234589A1 CA 2234589 CA2234589 CA 2234589 CA 2234589 A CA2234589 A CA 2234589A CA 2234589 A1 CA2234589 A1 CA 2234589A1
Authority
CA
Canada
Prior art keywords
substantially circular
stent
stent defined
circular elements
elements
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.)
Abandoned
Application number
CA 2234589
Other languages
French (fr)
Inventor
Robert I. G. 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.)
RD INNOVATIONS Inc
Original Assignee
RD INNOVATIONS INC.
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 RD INNOVATIONS INC. filed Critical RD INNOVATIONS INC.
Priority to CA 2234589 priority Critical patent/CA2234589A1/en
Publication of CA2234589A1 publication Critical patent/CA2234589A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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
    • A61F2002/91508—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 the meander having a difference in amplitude along the band
    • 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
    • A61F2002/91516—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 the meander having a change in frequency along the band
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Physics & Mathematics (AREA)
  • Vascular Medicine (AREA)
  • Optics & Photonics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

An expandable stent comprising a proximal end and a distal end in communication with one another, a tubular wall disposed between the proximal end and the distal end, the tubular wall having a longitudinal axis and a porous surface, the stent being expandable from a first, contracted position to a second, expanded position upon the application of a radially outward force on the stent. The porous surface is defined, in two dimensions, by a plurality of substantially circular elements comprising a first substantially circular element which overlaps with a second substantially circular element to define a pair of intersection points.

Claims (51)

1. An expandable stent comprising a proximal end and a distal end in communication with one another, a tubular wall disposed between the proximal end and the distal end, the tubular wall having a longitudinal axis and a porous surface defined, in two dimensions, by a plurality of substantially circular elements comprising a first substantially circular element which overlaps with a second substantially circular element to define a pair of intersection points, the stent being expandable from a first, contracted position to a second, expanded position upon the application of a radially outward force on the stent.
2. The sent defined in claim 1, wherein the first substantially circular element is comprised in a first set of substantially circular elements having different diameters.
3. The stent defined in claim 2, wherein the first set comprises from 2 to 8 substantially circular elements.
4. The stent defined in claim 2, wherein the first set comprises from 2 to 6 substantially circular elements.
5. The stent defined in claim 2, wherein the first set comprises from 2 to 4 substantially circular elements.
6. The stent defined in any one of claims 2-5, wherein the substantially circular elements in the first set are concentric.
7. The stent defined in any one of claims 2-6, wherein a substantially circular element of the first set is disposed in the tubular wall such that a pair of tangential surfaces thereof are joined to one another.
8. The stent defined in any one of claims 2-7, wherein an adjacent pair of substantially circular elements in the first set are interconnected by a support section.
9. The stent defined in claim 8, wherein the support section is curved.
10. The stent defined in claim 9, wherein a tangential surface of the support section is joined to a tangential surface of one the adjacent pair of substantially circular elements.
11. The stent defined in claim 9, wherein a tangential surface of the support section is joined to a tangential surface of the substantially circular element having a smaller diameter in the adjacent pair.
12. The stent defined in claim 1, wherein the second substantially circular element is comprised in a second set of substantially circular elements having different diameters.
13. The stent defined in claim 12, wherein the second set comprises from 2 to substantially circular elements.
14. The stent defined in claim 12, wherein the second set comprises from 2 to substantially circular elements.
15. The stent defined in claim 12, wherein the second set comprises from 2 to substantially circular elements.
16. The stent defined in any one of claims 12-15, wherein the substantially circular elements in the second set are concentric.
17. The stent defined in any one of claims 12-16, wherein a substantially circular element of the second set is disposed in the tubular wall such that a pair of tangential surfaces thereof are joined to one another.
18. The stent defined in any one of claims 12-17, wherein an adjacent pair of substantially circular elements in the second set are interconnected by a support section.
19. The stent defined in claim 18, wherein the support section is curved.
20. The stent defined in claim 19, wherein a tangential surface of the support section is joined to a tangential surface of one the adjacent pair of subtantially circular elements.
21. The stent defined in claim 19, wherein a tangential surface of the support section is joined to a tangential surface of the substantially circular element having a smaller diameter in the adjacent pair.
22. The stent defined in claim 1, wherein the first substantially circular element is comprised in a first set of substantially circular elements having different diameters and the second substantially circular element is comprised in a second set of substantially circular elements having different diameters.
23. The stent defined in claim 22, wherein the first set and the second set contain the same number of substantially circular elements.
24. The stent defined in claim 23, wherein the first set and the second set each comprise from 2 to 8 substantially circular elements.
25. The stent defined in claim 23, wherein the first set and the second set each comprise from 2 to 6 substantially circular elements.
26. The stent defined in claim 23, wherein the first set and the second set each comprise from 2 to 4 substantially circular elements.
27. The stent defined in claim 23, wherein the substantially circular elements in the first set are concentric with respect to one another to define a first concentric point and the substantially circular elements in the second set are concentric with respect to one another to define a second concentric point.
28. The stent defined in any one of claims 22-27, wherein a substantially circular element of the first set is disposed in the tubular wall such that a pair of tangential surfaces thereof are joined to one another, and a substantially circular element of the second set is disposed in the tubular wall such that a pair of tangential surfaces thereof are joined to one another.
29. An expand stent comprising a proximal end and a distal end in communication with one another, a tubular wall disposed between the proximal end and the distal end, the tubular wall having a longitudinal axis and a porous surface defined, in two dimensions, by a repeating pattern comprising a first set of concentric substantially circular elements and a second set of concentric substantially circular elements, at least one substantially circular element from the first set overlapping with at least one substantially circular element of the second set, the stent being expandable from a first, contracted position to a second, expanded position upon the application of a radially outward force on the stent.
30. The stent defined in claim 29, wherein the first set and the second set contain the same number of substantially circular elements.
31. The stent defined in any one of claims 29-30, wherein the first set and the second set each comprise from 2 to 8 substantially circular elements.
32. The stent defined in any one of claims 29-30, wherein the first set and the second set each comprise from 2 to 6 substantially circular elements.
33. The stent defined in any one of claims 29-30, wherein the first set and the second set each comprise from 2 to 4 substantially circular elements.
34. The stent defined in any one of claims 22-33, wherein the substantially circular elements in the first set are concentric with respect to one another to define a first concentric point and the substantially circular elements in the second set are concentric with respect to one another to define a second concentric point.
35. The stent defined in any one of claims 22-34, wherein a substantially circular element of the first set is disposed in the tubular wall such that a pair of tangential surfaces thereof are joined to one another, and a substantially circular element of the second set is disposed in the tubular wall such that a pair of tangential surfaces thereof are joined to one another.
36. The stent defined in any one of claims 29-36, wherein an adjacent pair of substantially circular elements in the first set are interconnected by a support section, and an adjacent pair of substantially circular elements in the second set are interconnected by a support section.
37. The stent defined in claim 36, wherein the support section is curved.
38. The stent defined in claim 37, wherein a tangential surface of the support section is joined to a tangential surface of one the adjacent pair of substantially circular elements.
39. The stent defined in claim 37, wherein a tangential surface of the support section is joined to a tangential surface of the substantially circular element having a smaller diameter in the adjacent pair.
40. The stent defined in claim 34, wherein the first concentric point and the second concentric point are aligned along a concentric axis which is in a non-parallel relationship with respect to the longitudinal axis.
41. The stent defined in claim 40, wherein the concentric axis is at an angle less than about 45° with respect to the longitudinal axis.
42. The stent defined in any one of claims 1-41, wherein the substantially circular element is circular.
43. The stent defined in any one of claims 1-41, wherein the substantially circular element is an ellipse.
44. The stent defined in any one of claims 1-41, wherein the substantially circular element comprises at least one land on which is disposed a radioopaque material.
45. The stent defined in any one of claims 1-44, wherein at least one of the first substantially circular element and the second substantially circular element comprises flexure means for substantially complementary extension and compression of a diametrically opposed of the circular element upon flexure of the stent.
46. The stent defined in any one of claims 1-45, wherein the stent is constructed of stainless steel.
47. The stent defined in any one of claims 1-45, wherein the stent is constructed of a self expanding material.
48. The stent defined in claim 47, wherein the self expanding material is nitinol.
49. The stent defined in any one of claims 47-48, wherein the self-expanding material expands at a temperature of greater than about 30°C.
50. The stent defined in any one of claims 47-48, wherein the self-expanding material expands at a temperature in the range of from about 30° to about 40°C.
51. The stent defined in any one of claims 1-50, in the form of a bifurcated stent comprising a proximal end and a distal end in communication with one another, the proximal end comprising a primary passageway and the distal end comprising a pair of secondary passageways.
CA 2234589 1998-04-07 1998-04-07 Expandable stent Abandoned CA2234589A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2234589 CA2234589A1 (en) 1998-04-07 1998-04-07 Expandable stent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2234589 CA2234589A1 (en) 1998-04-07 1998-04-07 Expandable stent

Publications (1)

Publication Number Publication Date
CA2234589A1 true CA2234589A1 (en) 1999-10-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2234589 Abandoned CA2234589A1 (en) 1998-04-07 1998-04-07 Expandable stent

Country Status (1)

Country Link
CA (1) CA2234589A1 (en)

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