EP1152775A1 - Alliage composite superelastique/a memoire de forme et stent en alliage malleable - Google Patents

Alliage composite superelastique/a memoire de forme et stent en alliage malleable

Info

Publication number
EP1152775A1
EP1152775A1 EP00915894A EP00915894A EP1152775A1 EP 1152775 A1 EP1152775 A1 EP 1152775A1 EP 00915894 A EP00915894 A EP 00915894A EP 00915894 A EP00915894 A EP 00915894A EP 1152775 A1 EP1152775 A1 EP 1152775A1
Authority
EP
European Patent Office
Prior art keywords
copper
stent
zinc
nickel
titanium
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.)
Withdrawn
Application number
EP00915894A
Other languages
German (de)
English (en)
Inventor
William J. Boyle
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.)
Abbott Cardiovascular Systems Inc
Original Assignee
Advanced Cardiovascular Systems 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 Advanced Cardiovascular Systems Inc filed Critical Advanced Cardiovascular Systems Inc
Publication of EP1152775A1 publication Critical patent/EP1152775A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A61L31/12—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
    • A61L31/121—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix
    • A61L31/124—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix of other specific inorganic materials not covered by A61L31/122 or A61L31/123
    • 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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
    • A61F2002/91575—Adjacent bands being connected to each other connected peak to trough
    • 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
    • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0076—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof multilayered, e.g. laminated structures
    • 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
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-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
    • A61F2250/0048—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 mechanical expandability, e.g. in mechanical, self- or balloon expandability

Definitions

  • the present invention relates to expandable endoprosthesis devices, generally called stents, that are adapted to be implanted into a patient's body lumen, such as a blood vessel, to maintain the patency thereof.
  • stents that are adapted to be implanted into a patient's body lumen, such as a blood vessel, to maintain the patency thereof.
  • the invention relates to metallic stents formed from a composite structure comprising discrete layers of super elastic or shape memory alloys and biocompatible, malleable alloys.
  • Stents are generally cylindrically shaped devices that function to hold open and sometimes expand a segment of a blood vessel or other anatomical lumen. Stents particularly are suitable for use to support and hold back a dissected arterial lining which can occlude the fluid passageway therethrough, or to maintain the patency of a portion of a blood vessel that has been subjected to an angioplasty procedure.
  • a variety of devices are known in the art for use as stents and have included coiled wires, slotted tubes, and adjacently connected cylindrical elements in a variety of patterns that are expanded after being placed intraluminaly on a balloon catheter; helically-wound coiled springs manufactured from a thermally expandable metal; and self-expanding stents inserted in a compressed state and subsequently allowed to expand at the intraluminal target site by withdrawing the compressive force, such as provided by an overlying sheath.
  • a stent structure that is longitudinally flexible to easily traverse the tortuous pathways of the human vasculature and which can be readily and uniformly expanded, but that will resist permanent deformation due to the compressive forces exerted by the body lumen itself or by external forces on the body lumen once the stent is deployed and expanded. Resistance to permanent deformation can be especially desirable, for example, in stents deployed within a patient's carotid artery, where a stent may be subjected to additional forces generated by the patient's head and neck movements, or by the pillow, arm, or other head rest used by the patient when sleeping, or by blows to the patient's neck or head.
  • U.S. Pat. No. 5,749,880 to Banas et al. discloses a stent-graft comprising a tubular stent structure with openings through its wall surfaces to permit radial expansion and circumferentially adjacent layers of polytetrafluoroethylene (ePTFE) covering the inner and outer wall surfaces of the stent.
  • ePTFE polytetrafluoroethylene
  • the ePTFE coverings are sintered to the tubular stent to bond around and through the wall surfaces of the tubular stent.
  • the ePTFE coverings expand as well to prevent exposing the stent to body tissue or fluids.
  • the goal of this stent therefore is to enhance the biocompatibility of the stent rather than to enhance its mechanical properties.
  • U.S. Patent No. 5,725,570 to Heath discloses tubular prostheses that are woven from a filament consisting of a metal outer layer with an exposed outer surface and an inner core comprised of a different material than the outer layer.
  • the outer layer is selected from superelastic alloys such as nickel-titanium (nitinol) or stainless steel, and the core is a high density, radiopaque metal such as tantalum.
  • Stents formed from such a filament are said to exhibit substantially the elasticity properties of a solid nitinol filament, but with higher radiopacity.
  • such a filament does not impart increased structural strength to the filament, and does not alleviate problems associated with woven wire stents such as lower than desirable crush resistance.
  • the filament experiences a wide range of tension and compression as it is bent during weaving and placement of the stent, as well as during use. These forces are experienced to different degrees by the inner core and the outer layer and could be a potential source of failure due to the different responses exhibited by the dissimilar metals in the core and in the outer layer.
  • Another type of device is, for example, disclosed in U.S. Patent No. 5,769,882 to Fogarty et al, and comprises essentially a tubular prosthesis body with an overlying sealing layer to provide a fluid-tight seal between the exterior surface of the prosthesis and the inner wall of the body lumen.
  • the tubular body is disclosed as being comprised of two or more different materials, such as organic polymers and metallic elements, to provide different characteristics to the body, such as shape memory, drug delivery, bioabsorbability, and radiopaqueness.
  • the specification discloses that such different materials can be incorporated in a variety of ways, such as different interwoven helices and braids, and include tantalum, nitinol, polyester, and PTFE. Again, this type of device appears limited to woven structures, and is directed to structures wherein the individual filaments are comprised of a single homogeneous material. Further, this type of device does not appear to address the goal of increased structural strength.
  • the present invention addresses the above-mentioned needs by providing a tubular stent structure manufactured from a metallic tube comprising one or more layers of a biocompatible, malleable material co-drawn with, or compression fit onto, one or more layers of a superelastic, or shape memory alloy, material.
  • the stent is manufactured by forming various patterns into the wall of the tube to create radially expandable, interconnected elements. The patterns may be formed by various methods, such as laser cutting, mechanical grinding or chemical etching, or a combination of these methods.
  • the stent is introduced into the vasculature of the patient and deployed at the target site using well-known balloon angioplasty techniques.
  • the stent Once expanded, the stent exhibits, due to the malleable material layer, structural strength and crush resistance to support the vascular wall and to maintain the patency of the vessel.
  • the stent additionally exhibits enhanced resistance to permanent deformation due to the superelastic material layer that proceeds to spring back to a predetermined expanded size and shape whenever subjected to a compressive force.
  • a stent formed according to the method of the present invention provides an axially flexible structure that, when expanded, offers radial strength and superior resistance to permanent deformation.
  • the stent is manufactured economically using known methods and materials, and comprises a significant improvement to the long-term safety of stents and stent-like devices.
  • FIGURE 1 is a cross-sectional view depicting a tube for making a stent according to the present invention
  • FIG. 2 is a plan view depicting a flattened section of a stent pattern made according to the present invention.
  • FIG. 3 is a plan view depicting a flattened section of an alternative embodiment stent pattern made according to the present invention.
  • a cylindrical tube 10 is comprised of a co-drawn outer layer 30 and an inner layer 32.
  • the embodiment of the cylindrical tube 10 shown in FIG. 1 is drawn in a cylindrical configuration with an inner lumen 40 defined by an inner exposed surface 34 of the inner layer 32 and extending axially through the tube 10.
  • the inner layer 32 may be disposed within the outer layer 30 by a variety of methods.
  • a preferred method entails co-drawing the inner layer and the outer layer, resulting in a tight, continuous interface 36 between the inner and the outer layer. Details of the co-drawing process may be found in, for instance, Volume 14: Forming and Forging of the Metals Handbook®. Ninth Edition. Copyright 1988 by ASM International.
  • An alternative method involves compression fitting the outer layer onto the inner layer, such as by disposing the inner layer on a fitted mandrel of a preselected shape for support, sliding the outer layer over the inner layer, and subjecting the assembly comprised of the two layers to a compressive force sufficient to collapse the two layers over the mandrel to assume the shape of the mandrel, following which the tubular body thus formed by the two layers can be removed from the mandrel and further processed as described elsewhere in the disclosure.
  • the outer layer 30 preferably is formed from a malleable metallic material that exhibits sufficient strength when expanded to maintain the patency of the vessel wall.
  • a preferred material for the outer layer is stainless steel, which is well suited for intravascular applications due to its biocompatibility and structural strength.
  • Other materials that may be employed in forming the outer layer include cobalt, platinum, iridium, gold, magnesium, titanium, tantalum, and platinum-iridium alloys.
  • the inner layer 32 is formed from an elastic metallic material that will spring back to its original size and shape whenever subjected to a deforming force.
  • the inner layer may therefore be manufactured from spring steel or from alloys exhibiting superelastic or shape memory properties. Articles manufactured from such alloys may be deformed from their original shape into a different configuration that is heat unstable, and upon the application of heat will revert to the original configuration.
  • Certain shape memory alloys including superelastic nickel-titanium (NiTi) (nitinol) or copper-zinc-aluminum (CuZnAl) alloys that are well known in the art, can be deformed through the application of stress to the article of manufacture and will revert to their original shape upon removal of the stress in a phenomenon generally referred to as stress induced martensite (SIM), thereby eliminating the need for alternately cooling and heating the article.
  • SIM shape memory alloys that are stressed at temperatures between where the alloy first begins to transform from austenite to martensite, and the maximum temperature at which martensite can occur, deform elastically up to a critical stress and then continue to deform through the formation of SIM.
  • a SIM shape memory alloy selected for making the inner layer 32 be one that reverts back to austenite at the typical human body temperature of about 36.7 °C (98 °F ).
  • Other materials suitable for forming the inner layer 32 include copper-tin, copper-zinc, copper-zinc-tin, copper-zinc-xenon, copper-aluminum-nickel, copper-gold- zinc, gold-cadmium, gold-copper-zinc, iron beryllium (Fe 3 Be), iron platinum (Fe 3 Pt), indium-thallium, iron-manganese, iron-nickel-titanium-cobalt, nickel-titanium-vanadium, and silver-cadmium.
  • Examples of superelastic and shape memory alloys are found in U.S. Patent No. 4,035,007 to Harrison et al., U.S. Patent No.
  • the final stent is manufactured by cutting out a pattern through the outer and inner layers to form radially expandable elements 50 connected to adjacent elements by interconnecting members 52. Numerous patterns may be cut into the body 10 to form an expandable stent, and FIG. 3 shows an alternative embodiment of such a pattern.
  • U.S. Patent No. 5,514,154 to Lau et al. U.S. Patent No. 5,569,295 to Lam
  • U.S. Patent No. 5,649,952 to Lam U.S. Patent No. 5,728,158 to Lau et al.
  • U.S. Patent No. 5,735,893 to Lau et al. describe such radially expandable stent patterns.
  • expandable elements 50 and 60 preferably are formed out of the body 10 through a laser cutting process, such as the process described in the previously referenced patents, as well as commonly owned U.S. Patent No. 5,759,192 to Saunders.
  • Another preferred method involves chemically etching the tube 10, such as by the process described in U.S. Patent No. 5,735,893 to Lau et al. referenced above.
  • the present invention provides a new and improved stent for maintaining the patency of a body lumen while offering superior resistance to permanent deformation. While the invention has been illustrated and described herein in terms of its use as an intravascular stent, it will be apparent to those skilled in the art that the stent structure disclosed herein can be used to manufacture other types of expandable intravascular devices, such as grafts, filters, and the like. Additionally, the scope of the invention is not limited to a stent with only one layer each of malleable metal and elastic alloy, but rather encompasses the use of tubular structured comprised of multiple layers of such malleable metals and elastic alloys to form stents and other such devices.

Landscapes

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

Abstract

L'invention concerne une structure composite de stent définie par des ouvertures ménagées dans un élément tubulaire formé à partir d'une ou plusieurs couches de métal malléable biocompatible, et d'une ou plusieurs couches d'un alliage superélastique ou à mémoire de forme. Ces couches sont étirées ensemble ou raccordées par compression.
EP00915894A 1999-02-26 2000-02-25 Alliage composite superelastique/a memoire de forme et stent en alliage malleable Withdrawn EP1152775A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US25980899A 1999-02-26 1999-02-26
US259808 1999-02-26
PCT/US2000/004987 WO2000050100A1 (fr) 1999-02-26 2000-02-25 Alliage composite superelastique/a memoire de forme et stent en alliage malleable

Publications (1)

Publication Number Publication Date
EP1152775A1 true EP1152775A1 (fr) 2001-11-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00915894A Withdrawn EP1152775A1 (fr) 1999-02-26 2000-02-25 Alliage composite superelastique/a memoire de forme et stent en alliage malleable

Country Status (4)

Country Link
EP (1) EP1152775A1 (fr)
JP (1) JP2002537072A (fr)
AU (1) AU3709100A (fr)
WO (1) WO2000050100A1 (fr)

Cited By (1)

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CN108543109A (zh) * 2018-03-13 2018-09-18 淮阴工学院 低磨双重抗菌钛基纳米复合材料骨植入体及其成形方法

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EP1212986A1 (fr) 2000-12-08 2002-06-12 SORIN BIOMEDICA CARDIO S.p.A. Stent pour angioplastie et son méthode de manufacture
DE10301850B4 (de) * 2003-01-16 2017-05-04 Dendron Gmbh Stent
US7789979B2 (en) * 2003-05-02 2010-09-07 Gore Enterprise Holdings, Inc. Shape memory alloy articles with improved fatigue performance and methods therefor
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WO2007083288A2 (fr) 2006-01-23 2007-07-26 Atria Medical Inc. Dispositif d’ancre cardiaque
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