DE19653709A1 - Stent - Google Patents

Stent

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Publication number
DE19653709A1
DE19653709A1 DE19653709A DE19653709A DE19653709A1 DE 19653709 A1 DE19653709 A1 DE 19653709A1 DE 19653709 A DE19653709 A DE 19653709A DE 19653709 A DE19653709 A DE 19653709A DE 19653709 A1 DE19653709 A1 DE 19653709A1
Authority
DE
Germany
Prior art keywords
stent
cross
weakening
elements
web
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
DE19653709A
Other languages
German (de)
Other versions
DE19653709C2 (en
Inventor
Curt Dr Ing Kranz
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.)
Biotronik SE and Co KG
Original Assignee
Biotronik Mess und Therapiegeraete GmbH and Co
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 Biotronik Mess und Therapiegeraete GmbH and Co filed Critical Biotronik Mess und Therapiegeraete GmbH and Co
Priority to DE19653709A priority Critical patent/DE19653709C2/en
Priority to EP97949870A priority patent/EP0884986B1/en
Priority to PCT/DE1997/002569 priority patent/WO1998018404A1/en
Priority to DE59711751T priority patent/DE59711751D1/en
Publication of DE19653709A1 publication Critical patent/DE19653709A1/en
Application granted granted Critical
Publication of DE19653709C2 publication Critical patent/DE19653709C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • A61F2002/9155—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
    • A61F2230/0004—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
    • A61F2250/0018—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 elasticity, stiffness or compressibility
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/0073—Coating or prosthesis-covering structure made of compounds based on metal carbides
    • A61F2310/00742—Coating made of silicon carbide

Landscapes

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

Description

Die Erfindung betrifft einen Stent, insbesondere Koronar­ stent, als intraluminales Expansionselement, entsprechend der im Oberbegriff des Anspruchs 1 genannten Art sowie Verfahren zur Herstellung eines derartigen Stents.The invention relates to a stent, in particular coronary stent, as an intraluminal expansion element, accordingly the type mentioned in the preamble of claim 1 and Process for producing such a stent.

Aus den europäischen Patentschriften EP-B1 0 364 787 und EP-B1 335 341 ist ein aufweitbares intraluminales Element mit mindestens einem dünnwandigen, rohrförmigen Teil (nachfolgend als Stent bezeichnet) bekannt. Die Mantelflä­ che des Stents ist durchbrochen netzförmig ausgebildet und weist dabei Ausnehmungen auf, die durch sich geradlinig in axialer und in Umfangsrichtung erstreckende stegartigen Elemente von geringer Materialstärke begrenzt sind. Die stegartigen Elemente bestehen aus der restlichen Rohrwan­ dung, von der das Material im Bereich der Ausnehmungen ent­ fernt wurde.From European patent specifications EP-B1 0 364 787 and EP-B1 335 341 is an expandable intraluminal element with at least one thin-walled, tubular part (hereinafter referred to as a stent). The mantle surface of the stent is open and reticulated has recesses that are straight in axially and circumferentially extending web-like Elements of low material thickness are limited. The web-like elements consist of the remaining tube wall dung from which the material in the area of the recesses was removed.

Derartige Stents werden in einem operativen Eingriff unter Einwirkung von von innen nach außen gerichteten Kräften durch einen mit Druckgas beaufschlagten schlauchförmigen Dilator, expandiert. Der Stent behält dabei trotz Verfor­ mung seine Rohrform bei und weitet das durch Ablagerungen verengte Gefäß auf.Such stents are placed in a surgical procedure Action from inside to outside forces through a hose-shaped pressurized gas Dilator, expanding. The stent remains in spite of Verfor ting its tube shape and widening it through deposits narrowed vessel.

Der bekannte Stent weist den Nachteil auf, daß das Expan­ dieren aufgrund der Verformung der sich axial erstreckenden stegartiges Elemente sich im Bereich des Stentendes nur in beschränktem Maße an die sich in diesem Bereich, wo der Stent in seiner Wirksamkeit endet, nicht an die Form des angrenzenden Gewebes anpassen kann, da der Formänderung der einzelnen stegartigen Elemente des Stents relativ enge Grenzen gesetzt sind.The known stent has the disadvantage that the expan dieren due to the deformation of the axially extending web-like elements only in the area of the stent end to a limited extent in this area, where the Stent ends in effectiveness, not the shape of the adjoining tissue can adapt because of the change in shape of the individual web-like elements of the stent are relatively narrow There are limits.

Ausgehend von den Mängeln des Standes der Technik liegt der Erfindung die Aufgabe zugrunde, einen expandierbaren Stent der eingangs genannten Gattung anzugeben, welcher möglichst sicher - und damit auch ohne die Gefahr eines durch Span­ nungsüberlastung bedingten Bruchs im Bereich der steg­ artigen Elemente, expandierbar ist. Es tritt hier ein stu­ fenförmiger Übergang ein, der den Bluttransport behindert.Based on the shortcomings of the prior art, the Invention, the object of an expandable stent to specify the genus mentioned at the beginning, which one if possible safe - and therefore also without the risk of chip break caused by overload in the area of the web like elements, is expandable. A step occurs here fen-shaped transition that hinders blood transport.

Die Aufgabe wird durch die kennzeichnenden Merkmale des An­ spruchs 1 gelöst.The task is characterized by the characteristics of the contractor spell 1 solved.

Die Erfindung schließt die technische Lehre ein, daß am En­ de von einem Stent erweiterten Gefäßbereich ein möglichst "fließender" Übergang mit einer variablen ausgleichenden Querschnittsänderung erfolgen soll.The invention includes the technical teaching that the En de a vascular region expanded by a stent if possible "flowing" transition with a variable balancing Cross-sectional change should take place.

Eine Materialschwächung erfolgt zum Ende eines Stents oder Stentsegments hin, um hier Widerstand gegen Verformungen zu verringern.A material weakening occurs at the end of a stent or Stent segments to provide resistance to deformation reduce.

Dies geschieht durch eine Querschnittsverringerung der steg­ artigen Bereiche zum Stentnde hin. Diese Querschnittsver­ ringerung wird bevorzugt unter Beibehaltung der radialen Abmessungen erzeugt, so daß der Stent aus einem rohrförmi­ gen Querschnitt mittels eines Laser-Schneidwerkzeugs durch Herausscheiden der ausgesparten Bereiche erzeugt werden kann.This is done by reducing the cross-section of the web like areas towards stenting. This cross-sectional ver Ringing is preferred while maintaining the radial Dimensions created so that the stent from a tubular cross section by means of a laser cutting tool Extracting the recessed areas are generated can.

Um eine kontinuierliche Anpassung zu erhalten, erfolgt eine - insbesondere lineare - Zunahme der Schwächung zum Ende des Stents hin. In order to obtain a continuous adjustment, a - especially linear - increase in weakening towards the end of the stent.  

Weitere Einzelheiten von derartigen Stents ergeben sich aus einer Anzahl von gleichzeitig eingereichten Patentanmeldun­ gen derselben Anmelderin.Further details of such stents result from a number of patent applications filed simultaneously same applicant.

Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet bzw. werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Fig. näher dargestellt. Es zei­ gen:Other advantageous developments of the invention are characterized in the subclaims and will be described hereinafter together with the description of the preferred embodiments of the invention with reference to FIGS. Closer. Show it:

Fig. 1 eine bevorzugte Ausführungsform der Erfindung in Seitenansicht, Fig. 1 shows a preferred embodiment of the invention in side view,

Fig. 2 ein Detail der in Fig. 1 dargestellten Ausfüh­ rungsform im Bereich des Stentendes. Fig. 2 shows a detail of the embodiment shown in Fig. 1 in the area of the stent end.

Der in Fig. 1 wiedergegebene Stent 1 weist eine rohrför­ mig/hohlzylindrische Grundform mit zahlreichen Durchbrüchen auf, welche von expansiblen Strukturelementen umschlossen sind, die die Form von gestauchten Ringen aufweisen. Diese werden nachfolgend als "expansible Elemente" bezeichnet und sind an einem Beispiel mit einer strichpunktierten Linie 2 markiert. Diese expansiblen Elemente 2 werden gebildet durch umlaufende schmale stegartige Bereiche 4 mit rechtec­ kigem Querschnitt und zeichnen sich dadurch aus, daß sie eine Ausnehmung 3 ringförmig umschließen.The stent 1 shown in Fig. 1 has a tubular / hollow cylindrical basic shape with numerous openings, which are surrounded by expansible structural elements which have the shape of compressed rings. These are referred to below as "expandable elements" and are marked with a dash-dotted line 2 using an example. These expandable elements 2 are formed by circumferential narrow web-like areas 4 with rectangular cross section and are characterized in that they enclose a recess 3 in a ring shape.

Die expansiblen Elemente 2 haben in vollständig expandier­ tem Zustand (in der Zeichnung nicht dargestellt) nahezu die Form eines Vielecks.The expandable elements 2 have in the fully expanded state (not shown in the drawing) almost the shape of a polygon.

Die expansiblen Elemente sind derart geformt, daß sie sich nach dem Einbringen des Stents in ein Gefäß durch Dilatie­ ren mit einem Ballonkatheter mit minimaler Verformung in die Polygonalform umwandeln.The expansible elements are shaped so that they are after inserting the stent into a vessel by dilatation  with a balloon catheter with minimal deformation convert the polygonal shape.

Die in Fig. 1 dargestellte Ausführung eines Stents ist in mehrere, in axialer Richtung aufeinanderfolgender Segmente untergliedert. Diese Segmente sind unter sich gleichartig ausgebildet und weisen eine Mantelfläche auf, in welcher Ausnehmungen 3 in tangentialer Richtung aneinandergereiht und durch Verbindungsbereiche miteinander verbunden sind.The embodiment of a stent shown in FIG. 1 is subdivided into several segments which follow one another in the axial direction. These segments are of identical design among themselves and have a lateral surface in which recesses 3 are strung together in the tangential direction and connected to one another by connecting regions.

Die vorstehend beschriebene Ausbildung der Stents gestattet ein Expandieren der rohrförmigen Stents, ohne daß es an den Verbindungspunkten zur Ausbildung von zur Zerstörung von Stegbereichen führenden Extremwerten der Kerbspannung kommt.The design of the stents described above permits expanding the tubular stents without affecting the Connection points for training to destroy Extreme values of the notch stress leading to the web areas is coming.

In den Fig. 2 ist dargestellt, wie sich das Ende 11 des Stents 1 innerhalb eines Blutgefäßes durch abnehmende Stei­ figkeit kontinuierlich dem sich hier wieder verringernden Querschnitt des Gefäßes anpaßt. Der Bogenbereich 12 ist kaum mehr expandiert und ermöglicht ein verwirbelungsfreies Fließen des Blutstroms 14. Die Steifigkeit des Stents ist also zu seinem Ende hin so verringert, daß sich unter Be­ rücksichtigung der Widerstandskraft des Blutgefäßes beim Expandieren ein kontinuierlicher Übergang ergibt.In Fig. 2 it is shown how the end 11 of the stent 1 within a blood vessel by decreasing stiffness adapts continuously to the again decreasing cross-section of the vessel. The arch region 12 is hardly expanded anymore and enables a swirl-free flow of the blood stream 14 . The stiffness of the stent is so reduced towards its end that there is a continuous transition taking into account the resistance of the blood vessel when expanding.

Der hier dargestellte Stent besteht aus Titan oder Tantal oder einem anderen biokompatiblen Material oder einer ent­ sprechenden Metallegierung als Werkstoff, woraus eine gute Körperverträglichkeit und eine ausgezeichnete Verformbar­ keit resultiert. Eine Mikrobeschichtung aus amorphem Sili­ ciumcarbid wirkt einer Thrombenbildung entgegen. The stent shown here is made of titanium or tantalum or another biocompatible material or an ent speaking metal alloy as a material, from which a good Body tolerance and excellent deformability results. A micro-coating made of amorphous sili cium carbide counteracts thrombus formation.  

Die Erfindung beschränkt sich in ihrer Ausführung nicht auf die vorstehend angegebenen bevorzugten Ausführungsbei­ spiele. Vielmehr ist eine Anzahl von Varianten günstig, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch macht.The invention is not limited in its execution the preferred embodiments given above games. Rather, a number of variants are favorable, which of the solution shown also in principle makes use of different types.

Claims (6)

1. Stent, insbesondere Koronarstent, bestehend aus min­ destens einem dünnwandigen, rohrförmigen Element, dessen Mantelfläche durchbrochen netzförmig ausgebildet ist und dabei Ausnehmungen aufweist, die durch stegartige Elemente von geringer Breite begrenzt sind, wobei die stegartigen Elemente aus dem restlichen Material der Rohrwandung gebil­ det werden, von dem das Material im Bereich der Ausnehmun­ gen entfernt wurde, dadurch gekennzeichnet, daß der Materialquerschnitt des Stents in einem an sein Ende angren­ zenden Bereich derart geschwächt ist, daß seine Steifigkeit- und damit seine Fähigkeit expandierend zu wirken - ver­ ringert ist.1. stent, in particular coronary stent, consisting of at least one thin-walled, tubular element, the outer surface of which is perforated in the form of a net and has recesses which are delimited by web-like elements of small width, the web-like elements being formed from the remaining material of the tube wall are, from which the material in the area of the recesses has been removed, characterized in that the material cross section of the stent is weakened in a region adjoining its end in such a way that its rigidity - and thus its ability to act expanding - is reduced ver. 2. Stent nach Anspruch 1, dadurch gekennzeichnet, daß die Materialschwächung zum Ende des Stents oder Stentseg­ ments hin zunimmt.2. Stent according to claim 1, characterized in that the weakening of material at the end of the stent or stent segment increases. 3. Stent nach Anspruch 2, dadurch gekennzeichnet, daß die Materialschwächung zum Ende des Stents oder Stentseg­ ments hin gleichmäßig zunimmt.3. Stent according to claim 2, characterized in that the weakening of material at the end of the stent or stent segment increases steadily. 4. Stent nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Schwächung durch eine Querschnitts­ verringerung in tangentialer Richtung erfolgt, während der Querschnitt in radialer Richtung im wesentlichen unverändert bleibt. 4. Stent according to one of the preceding claims, characterized characterized in that the weakening by a cross-section reduction in the tangential direction takes place during the Cross section in the radial direction essentially unchanged remains.   5. Stent nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß als Material Titan, Tantal oder einem anderen biokompatiblen Metall oder einer entsprechenden Me­ tallegierung vorgesehen ist.5. Stent according to one of the preceding claims, characterized characterized in that titanium, tantalum or a other biocompatible metal or a corresponding me valley alloy is provided. 6. Stent nach Anspruch 13, dadurch gekennzeichnet, daß eine Beschichtung aus amorphem Siliciumcarbid vorgesehen ist.6. Stent according to claim 13, characterized in that a coating of amorphous silicon carbide is provided is.
DE19653709A 1996-10-28 1996-12-10 Stent Expired - Fee Related DE19653709C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19653709A DE19653709C2 (en) 1996-10-28 1996-12-10 Stent
EP97949870A EP0884986B1 (en) 1996-10-28 1997-10-28 Stent
PCT/DE1997/002569 WO1998018404A1 (en) 1996-10-28 1997-10-28 Stent
DE59711751T DE59711751D1 (en) 1996-10-28 1997-10-28 Stent

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19645289 1996-10-28
DE19653709A DE19653709C2 (en) 1996-10-28 1996-12-10 Stent

Publications (2)

Publication Number Publication Date
DE19653709A1 true DE19653709A1 (en) 1998-07-16
DE19653709C2 DE19653709C2 (en) 1999-07-01

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DE19653709A Expired - Fee Related DE19653709C2 (en) 1996-10-28 1996-12-10 Stent
DE59711751T Expired - Lifetime DE59711751D1 (en) 1996-10-28 1997-10-28 Stent

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59711751T Expired - Lifetime DE59711751D1 (en) 1996-10-28 1997-10-28 Stent

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10012460A1 (en) * 2000-03-15 2001-09-20 Biotronik Mess & Therapieg Stent consists of several adjacent lengthwise tubular sections joined by first and second connections consisting of cell-type elements of one orientation.
DE102004045226A1 (en) * 2004-09-17 2006-03-30 Optiray Medizintechnik Gmbh support prosthesis
DE102016106577A1 (en) 2016-04-11 2017-10-12 Biotronik Ag Tubular intravascular implant
DE102016106585A1 (en) 2016-04-11 2017-10-12 Biotronik Ag Tubular intravascular implant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344425A (en) * 1990-09-14 1994-09-06 Interface Biomedical Laboratories, Corp. Intravascular stent and method for conditioning the surfaces thereof
DE4418336A1 (en) * 1994-05-26 1995-11-30 Angiomed Ag Stent for widening and holding open receptacles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102417A (en) * 1985-11-07 1992-04-07 Expandable Grafts Partnership Expandable intraluminal graft, and method and apparatus for implanting an expandable intraluminal graft
CA1322628C (en) * 1988-10-04 1993-10-05 Richard A. Schatz Expandable intraluminal graft

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344425A (en) * 1990-09-14 1994-09-06 Interface Biomedical Laboratories, Corp. Intravascular stent and method for conditioning the surfaces thereof
DE4418336A1 (en) * 1994-05-26 1995-11-30 Angiomed Ag Stent for widening and holding open receptacles

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10012460A1 (en) * 2000-03-15 2001-09-20 Biotronik Mess & Therapieg Stent consists of several adjacent lengthwise tubular sections joined by first and second connections consisting of cell-type elements of one orientation.
US6896695B2 (en) 2000-03-15 2005-05-24 Biotronik Mess-Und Therapiegeraete Gmbh & Co. Stent
DE102004045226A1 (en) * 2004-09-17 2006-03-30 Optiray Medizintechnik Gmbh support prosthesis
DE102004045226B4 (en) * 2004-09-17 2008-01-17 Optiray Medizintechnik Gmbh support prosthesis
US8628563B2 (en) 2004-09-17 2014-01-14 Thilo Fliedner Support prosthesis
DE102016106577A1 (en) 2016-04-11 2017-10-12 Biotronik Ag Tubular intravascular implant
DE102016106585A1 (en) 2016-04-11 2017-10-12 Biotronik Ag Tubular intravascular implant

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DE19653709C2 (en) 1999-07-01

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