CA2442200A1 - Radiopaque alloy stent - Google Patents

Radiopaque alloy stent Download PDF

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Publication number
CA2442200A1
CA2442200A1 CA002442200A CA2442200A CA2442200A1 CA 2442200 A1 CA2442200 A1 CA 2442200A1 CA 002442200 A CA002442200 A CA 002442200A CA 2442200 A CA2442200 A CA 2442200A CA 2442200 A1 CA2442200 A1 CA 2442200A1
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CA
Canada
Prior art keywords
max
weight percent
alloy
approximately
composition
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
CA002442200A
Other languages
French (fr)
Other versions
CA2442200C (en
Inventor
Charles H. Craig
Thomas A. Trozera
Herbert R. Radisch, Jr.
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
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Individual
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Filing date
Publication date
Priority claimed from US09/823,308 external-priority patent/US20020193865A1/en
Application filed by Individual filed Critical Individual
Publication of CA2442200A1 publication Critical patent/CA2442200A1/en
Application granted granted Critical
Publication of CA2442200C publication Critical patent/CA2442200C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L31/18—Materials at least partially X-ray or laser opaque
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/02—Inorganic materials
    • A61L31/022—Metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/04—Alloys based on a platinum group metal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Inorganic Chemistry (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Materials For Medical Uses (AREA)
  • Tents Or Canopies (AREA)

Abstract

The present invention is directed toward a stent fabricated from an austenitic 300 series stainless steel alloy having improved radiopaque characteristics.
The modified stainless steel alloy consists essentially of, in weight percent, about (A) wherein variable "X" could be selected from a group consisting of Gold, Osmium, Palladium, Rhenium, Tantalum, Iridium, Ruthenium or Tungsten, and mixtures thereof. The alloy provides a unique combination of strength, ductility, corrosion resistance and other mechanical properties which also has improved radiopaque characteristics in the thin sections necessary to manufacture a stent.

Claims (17)

1. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C Mn Si P S Cr Mo Ni Au 0.030 2.000 0.750 0.023 0.010 12.000- 0.000- 10.000- 2.5-10.0 max. max. max. max. max. 20.000 3.000 18.000 with a substantial portion of the balance including iron.
2. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C~ Mn~ Si ~ P ~ S ~ Cr ~ Mo Ni ~ Os 0.030 2.000 0.750 0.023 0.010 12.000- 0.000-3.000 10.0000-0.5-max. max. max. max. max. 20.000 18.000 5.0 with a substantial portion of the balance including iron.
3. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C ~ Mn ~ Si~ P~ S Cr Mo Ni Pd 0.030 2.000 0.750 0.023 0.010 12.000- 0.000-3.000 10.000- 2.5-max. max. max. max. max. 20.000 18.000 64.0 with a substantial portion of the balance including iron.
4. An intravascular stent manufactured from as alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C Mn Si P S Cr Mo Ni Ir 0.030 2.000 0.750 0.023 0.010 12.000- 0.000-3.000 10.000- 2.0-max. max. max. max. max. 20.000 18.000 10.0 with a substantial portion of the balance including iron.
5. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C Mn Si P S Cr Mo Ni Re 0.030 2.000 0.750 0.023 0.010 12.000- 0.000-3.000 10.000-1.0-max. max. max. max. max. 20.000 18.000 5.0 with a substantial portion of the balance including iron.
6. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C~ Mn~ Si~ P ~ S ~ Cr ~ ~Mo ~ Ni ~Ta 0.030 2.000 0.750 0.023 0.010 12.000- 0.000-3.000 10.000- 1.0-max. max. max. max. max. 20.000 18.000 2.0 with a substantial portion of the balance including iron.
7. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising, in weight percent, about C~ Mn~~ Si~ P~ S~ Cr~~ Mo ~ Ni ~W
0.030 2.000 0.750 0.023 0.010 12.000- 0.000-3.000 10.000- 1.0-max. max. max. max. max. 20.000 18.000 4.0 with a substantial portion of the balance including iron.
8. An intravascular stent manufactured from an alloy which provides increased radiopaque characteristics, said alloy comprising of, in weight percent, about C~ Mn~~Si~ P~ S~ Cr~~ Mo~ Ni~ Fe ~ Ru 0.030 2.000 0.750 0.023 0.010 12.000- 0.000-10.000- 46.185- 2.5-max. max. max. max. max. 20.000 3.000 18.000 74.000 10.0 with a substantial portion of the balance including iron.
9. An intravascular stent fabricated from a modified stainless steel alloy which provides increased radiopaque characteristics over standard 300 series stainless steel.
10. A steel alloy comprising, in weight percent, about C ~Mn~ Si~ P~ S~ Cr~ Mo~ Ni Fe "X"
0.030 2.000 0.750 0.023 0.010 12.000- 000-3.000 10.000-46.185- 2.000-max. max. max. max. max. 20.000 18.000 74.000 10.000 wherein variable "X" is selected from the group consisting of Gold, Osmium, Palladium, Rhenium, Tantalum, Iridium, Ruthenium or Tungsten, and mixtures thereof.
11. A biocompatible composition having a greater absorption of X-ray radiation than type 316 stainless, said biocompatible composition comprising:
between approximately 12.0 weight percent and approximately 20.0 weight percent Chromium;
between approximately 10.0 weight percent and approximately 18.0 weight percent Nickel;
between approximately 46.0 weight percent and approximately 74.0 weight percent Iron; and between approximately 2.0 weight percent and approximately 10.0 weight percent of a chemical element selected from the group consisting of Gold, Osmium, Palladium, Rhenium, Iridium, Ruthenium, Tantalum, and combinations thereof.
12. A composition as recited in claim 11, wherein said composition further comprises Molybdenum and the weight percent of said Molybdenum is between approximately 2.0 and approximately 3Ø
13. A composition as recited in claim 11, wherein said composition further comprises Carbon and said Carbon is less than approximately 0.03 weight percent.
14. A composition as recited in claim 11, further comprising Manganese in an amount that is greater than zero and less than approximately 2.0 weight percent.
15. A composition as recited in claim 11, wherein said composition further comprises Phosphorus and said Phosphorus is less than approximately 0.008 weight percent.
16. A composition as recited in claim 11, wherein said composition further comprises Sulfur and said Sulfur is less than approximately 0.004 weight percent.
17. A composition as recited in claim 11, further comprising Silicon in an amount that is greater than zero and less than approximately 0.75 weight percent.
CA2442200A 2001-03-30 2002-03-29 Radiopaque alloy stent Expired - Fee Related CA2442200C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US09/823,308 US20020193865A1 (en) 2001-03-30 2001-03-30 Radiopaque stent
US09/823,308 2001-03-30
US36498502P 2002-03-15 2002-03-15
US60/364,985 2002-03-15
US10/112,390 US20030077200A1 (en) 2000-07-07 2002-03-28 Enhanced radiopaque alloy stent
US10/112,390 2002-03-28
PCT/US2002/009897 WO2002078763A1 (en) 2001-03-30 2002-03-29 Radiopaque alloy stent

Publications (2)

Publication Number Publication Date
CA2442200A1 true CA2442200A1 (en) 2002-10-10
CA2442200C CA2442200C (en) 2011-05-03

Family

ID=27381161

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2442200A Expired - Fee Related CA2442200C (en) 2001-03-30 2002-03-29 Radiopaque alloy stent

Country Status (7)

Country Link
US (1) US20030077200A1 (en)
EP (1) EP1372754B1 (en)
JP (1) JP4439813B2 (en)
AT (1) ATE364412T1 (en)
CA (1) CA2442200C (en)
DE (1) DE60220649T2 (en)
WO (1) WO2002078763A1 (en)

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