DE29805761U1 - Stenosis treatment stent - Google Patents

Stenosis treatment stent

Info

Publication number
DE29805761U1
DE29805761U1 DE29805761U DE29805761U DE29805761U1 DE 29805761 U1 DE29805761 U1 DE 29805761U1 DE 29805761 U DE29805761 U DE 29805761U DE 29805761 U DE29805761 U DE 29805761U DE 29805761 U1 DE29805761 U1 DE 29805761U1
Authority
DE
Germany
Prior art keywords
stent
meander
meanders
wires
bridge
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.)
Expired - Lifetime
Application number
DE29805761U
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German (de)
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Qualimed Innovative Medizinprodukte GmbH
Original Assignee
CONVENT GERD
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Publication date
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Priority to DE29805761U priority Critical patent/DE29805761U1/en
Publication of DE29805761U1 publication Critical patent/DE29805761U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155—Adjacent bands being connected to each other
    • A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2002/91566—Adjacent bands being connected to each other connected trough 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
    • 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
    • A61F2002/91575—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
    • 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
    • A61F2002/91583—Adjacent bands being connected to each other by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a 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
    • 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

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)
  • Inorganic Insulating Materials (AREA)
  • Surgical Instruments (AREA)

Description

PATENTANWALT DR. STARK ■ MOERSER STRASSE 140 "·" D-4#7803'kRE*FELDPATENT ATTORNEY DR. STARK ■ MOERSER STRASSE 140 "·" D-4 # 7803'kRE*FELD

Anwaltsakte: 98 044 / 4 thAttorney file: 98 044 / 4 th

Gerd Convent, Boleystraße 23, 47829 Krefeld
Stent zur StenosebehandlungGerd Convent, Boleystrasse 23, 47829 Krefeld
Stent for stenosis treatment

Die Erfindung betrifft einen Stent zur Stenosebehandlung, insbesondere einen ballonexpandierbaren Stent, aus ein Netzwerk bildenden, flexiblen Drähten.The invention relates to a stent for treating stenosis, in particular a balloon-expandable stent made of flexible wires forming a network.

Ballonexpandierbare Stents werden auf einem Ballonkatheter montiert und mit diesem bis in die verengte Stelle (Stenose) des Gefäßes oder des Hohlorgans eingeführt. Der Ballon wird inflatiert und dadurch der Stent dilatiert. Nach Erreichen des gewünschten Stentdurchmessers wird der Ballon deflatiert, so daß der Katheter entfernt werden kann.Balloon-expandable stents are mounted on a balloon catheter and inserted into the narrowed area (stenosis) of the vessel or hollow organ. The balloon is inflated and the stent is thereby dilated. Once the desired stent diameter has been reached, the balloon is deflated so that the catheter can be removed.

Daneben gibt es auch selbstexpandierende Stents. Vor dem Einführen des selbstexpandierenden Stents wird die Stenose mittels Ballonkatheter aufgedehnt. Der Stent wird über einen Führungsdraht oder einen Trägerkatheter mit Hilfe eines Spezialbestecks implantiert. Nach exakter Plazierung wird der Stent, zum Beispiel durch Zurückziehen einer Außenhülle oder Hüllenmembran des Implantationsbestecks, freigesetzt. Die selbständige Expansion erfolgt nach Stentdesign durch eine entsprechende Netzwerkkonstruktion oder durch ein spezielles Stentmaterial.There are also self-expanding stents. Before the self-expanding stent is inserted, the stenosis is expanded using a balloon catheter. The stent is implanted using a guide wire or a carrier catheter with the help of a special instrument. After precise placement, the stent is released, for example by pulling back an outer shell or shell membrane of the implantation instrument. The independent expansion takes place according to the stent design using a corresponding network construction or a special stent material.

PATENTANWALT DR. STARK · MOERSER STRASSE 140 D-47803 kREFELDPATENT ATTORNEY DR. STARK · MOERSER STRASSE 140 D-47803 kREFELD

Bekannte Stents weisen ein Netzwerk aus Drähten auf, die rautenförmige Maschen bilden. Die Drähte sind miteinander verbunden oder spiralförmig gedreht. Bei anderen Stenttypen wird das Netzwerk aus einem Metalltubus herausgestanzt und entsprechend aufbereitet.Known stents have a network of wires that form diamond-shaped meshes. The wires are connected to each other or twisted into a spiral. In other types of stents, the network is punched out of a metal tube and prepared accordingly.

Nachteilig bei den Stents mit rautenförmigen Maschen ist, daß eine Expansion des Stents auch mit einer Verkürzung der Stentlänge verbunden ist. Eine erhebliche Verkürzung kann die genaue Plazierung des Stents und somit die Behebung einer Striktur oder Stenose erschweren.The disadvantage of stents with diamond-shaped meshes is that an expansion of the stent is also associated with a shortening of the stent length. A significant shortening can make it more difficult to place the stent precisely and thus to repair a stricture or stenosis.

Aufgabe der Erfindung ist es, einen Stent der eingangs beschriebenen Gattung anzugeben, der sich durch geringe Kürzung bei der Expansion auszeichnet.The object of the invention is to provide a stent of the type described above, which is characterized by minimal shortening during expansion.

Diese Aufgabe wird dadurch gelöst, daß in Längsrichtung des Stents nebeneinander mehrere Reihen von in Umfangsrichtung des Stents mäanderförmig verlegten Drähten angeordnet sind und daß Mäander benachbarter Reihen durch Brückendrähte verbunden sind, die in Längsrichtung des Stents gekrümmt oder gewellt sind. Bei Expansion dieses Stents erzeugt der mäanderförmige Verlauf der Drähte eine nur geringe Verkürzung der einzelnen Reihen, die jedoch durch die gekrümmten oder gewellten Brückendrähte aufgefangen wird, so daß die Länge des Stents im wesentlichen konstant bleibt. Dabei können die Mäander in Längsrichtung des Stents vorzugsweise gerade Mäanderschenkel aufweisen. Die Eigenschaften des Stents bleiben aber auch erhalten, wenn die Mäander in Längsrichtung des Stents leicht gekrümmte Mäanderschenkel aufweisen.This task is solved by arranging several rows of wires laid in a meandering shape in the circumferential direction of the stent next to one another in the longitudinal direction of the stent and by connecting the meanders of adjacent rows by bridge wires that are curved or corrugated in the longitudinal direction of the stent. When this stent expands, the meandering course of the wires causes only a slight shortening of the individual rows, which is, however, compensated for by the curved or corrugated bridge wires, so that the length of the stent remains essentially constant. The meanders in the longitudinal direction of the stent can preferably have straight meander legs. The properties of the stent are also retained, however, if the meanders in the longitudinal direction of the stent have slightly curved meander legs.

Für den Anschluß der Brückendrähte an die Mäander gibt es verschiedene Möglichkeiten. So können die Brückendrähte anThere are various options for connecting the bridge wires to the meanders. The bridge wires can be connected to

PATENTANWALT DR. STARK · MOERSER STRASSE*140 · "0-47803 KREFELDPATENT ATTORNEY DR. STARK · MOERSER STRASSE*140 · "0-47803 KREFELD

den Mäanderschenkeln angeschlossen sein. Die Brückendrähte können aber auch an den die Mäanderschenkel verbindenden Mäanderbögen angeschlossen sein, wobei die Brückendrähte sowohl an den Außenseiten der Mäanderbögen als auch an den Innenseiten angeschlossen sein können.the meander legs. The bridge wires can also be connected to the meander arches connecting the meander legs, whereby the bridge wires can be connected to both the outside and the inside of the meander arches.

Auch für die Gestaltung des Netzwerks insgesamt bestehen verschiedene Möglichkeiten. Die Mäander können in Umfangsrichtung des Stents derart angeordnet sein, daß die Mäanderbögen benachbarter Reihen einander gegenüberliegen. Bei einer anderen Ausführung weisen die Mäanderbögen benachbarter Reihen in die gleiche Richtung.There are also various options for the design of the network as a whole. The meanders can be arranged in the circumferential direction of the stent in such a way that the meander arches of adjacent rows face each other. In another design, the meander arches of adjacent rows point in the same direction.

Die Anzahl der Brückendrähte kann in weiten Grenzen variiert werden und hängt gegebenenfalls auch vom Material des Netzwerks ab. Es können alle Mäander benachbarter Reihen durch Brückendrähte verbunden sein. Man kann aber auch jeden zweiten oder jeden dritten Mäander einer Reihe durch einen Brückendraht mit dem zugeordneten Mäander der benachbarten Reihe verbinden und die Brückendrähte der folgenden Reihen in Umfangsrichtung des Stents versetzt anordnen .The number of bridge wires can be varied within wide limits and may also depend on the material of the network. All meanders of adjacent rows can be connected by bridge wires. However, every second or every third meander in a row can also be connected to the corresponding meander in the adjacent row by a bridge wire and the bridge wires of the following rows can be arranged offset in the circumferential direction of the stent.

Vorteilhafterweise können zumindest einige Brückendrähte mehrfach gewunden, wie z. B. S-förmig oder dergleichen ausgebildet sein, wodurch zum einen eine gute Krimpbarkeit resultiert und zum anderen der Stent sehr flexibel ist und sich Biegungen gut anpassen kann, wobei die Länge in etwa gleichbleibt, da die Mehrfachwindungen sowohl eine Dehnung als auch eine Stauchung in Umf angsrichtung wie auch in axialer Richtung sehr gut ausgleichen können.Advantageously, at least some bridge wires can be wound multiple times, such as in an S-shape or the like, which on the one hand results in good crimpability and on the other hand the stent is very flexible and can adapt well to bends, whereby the length remains approximately the same, since the multiple windings can compensate very well for both stretching and compression in the circumferential direction as well as in the axial direction.

Für den Stent können unterschiedliche Materialien eingesetzt werden, zum Beispiel chirurgischer Edelstahl, TantalDifferent materials can be used for the stent, for example surgical stainless steel, tantalum

PATENTANWALT DR. STARK · MOERSER STRASSE 140 · D-47803 KREFELDPATENT ATTORNEY DR. STARK · MOERSER STRASSE 140 · D-47803 KREFELD

oder Nickel-Tantal-Legierungen. Auch Kunststoffe sind möglich. or nickel-tantalum alloys. Plastics are also possible.

Im folgenden werden in der Zeichnung dargestellte Ausführungsbeispiele der Erfindung erläutert. Es zeigen:In the following, embodiments of the invention shown in the drawing are explained. They show:

Fig. 1 die Abwicklung eines Stents,Fig. 1 the development of a stent,

Fig. 2 bis 7 andere Ausführungen des Gegenstandes nach Fig. 1.Fig. 2 to 7 other embodiments of the object according to Fig. 1.

Der dargestellte Stent ist gebildet aus mehreren in Längsrichtung des Stents nebeneinander angeordneten Reihen 1 von in Umfangsrichtung des Stents mäanderförmig verlegten Drähten 2, wobei Mäander 3 benachbarter Reihen 1 durch Brückendrähte 4 miteinander verbunden sind. Die Mäander 3 weisen bei der in Fig. 1 wiedergegebenen Ausführung gerade Mäanderschenkel 5 auf, die sich in Längsrichtung des Stents erstrecken und die durch Mäanderbögen 6 miteinander verbunden sind. Die Mäander 3 sind in Umfangsrichtung des Stents derart angeordnet, daß die Mäanderbögen 6 benachbarter Reihen 1 einander gegenüberliegen. Die Brückendrähte 4 sind bei der dargestellten Ausführung in Längsrichtung des Stents gewellt und mit Mäanderschenkeln 5 von einander gegenüberliegenden Mäandern 3 benachbarter Reihen 1 verbunden. Jeder zweite Mäander 3 einer Reihe 1 ist durch einen Brückendraht 4 mit dem zugeordneten Mäander 3 der benachbarten Reihe 1 verbunden. Die Brückendrähte 4 der aufeinanderfolgenden Reihen sind in Umfangsrichtung des Stents jeweils um einen Mäander 3 versetzt.The stent shown is formed from several rows 1 of wires 2 arranged in a meandering shape in the circumferential direction of the stent, arranged next to one another in the longitudinal direction of the stent, whereby meanders 3 of adjacent rows 1 are connected to one another by bridge wires 4. In the embodiment shown in Fig. 1, the meanders 3 have straight meander legs 5 which extend in the longitudinal direction of the stent and which are connected to one another by meander arches 6. The meanders 3 are arranged in the circumferential direction of the stent in such a way that the meander arches 6 of adjacent rows 1 are opposite one another. In the embodiment shown, the bridge wires 4 are corrugated in the longitudinal direction of the stent and connected to meander legs 5 of opposite meanders 3 of adjacent rows 1. Every second meander 3 of a row 1 is connected to the associated meander 3 of the adjacent row 1 by a bridge wire 4. The bridge wires 4 of the consecutive rows are each offset by one meander 3 in the circumferential direction of the stent.

In den Fig. 2 bis 7 bezeichnen gleiche Bezugszeichen gleiche Teile.In Fig. 2 to 7, like reference numerals designate like parts.

PATENTANWALT DR. STARK · MOERSER STRASSe"40 · '6-47803 KREFELDPATENT ATTORNEY DR. STARK · MOERSER STRASSe"40 · '6-47803 KREFELD

Die Ausführung nach Fig. 2 entspricht im wesentlichen der Ausführung nach Fig. 1, mit der Maßgabe, daß die Mäanderschenkel 5 in Längsrichtung des Stents gekrümmt sind.The design according to Fig. 2 corresponds essentially to the design according to Fig. 1, with the proviso that the meander legs 5 are curved in the longitudinal direction of the stent.

Bei der Ausführung nach Fig. 3 ist jeder dritte Mäander 3 einer Reihe 1 durch einen Brückendraht 4 mit dem zugeordneten Mäander 3 der benachbarten Reihe verbunden, wobei die Brückendrähte 4 der aufeinanderfolgenden Reihe in Umfangsrichtung des Stents um jeweils zwei Mäander 3 gegeneinander versetzt sind.In the embodiment according to Fig. 3, every third meander 3 of a row 1 is connected by a bridge wire 4 to the associated meander 3 of the adjacent row, wherein the bridge wires 4 of the successive row are offset from one another in the circumferential direction of the stent by two meanders 3 each.

Bei der Ausführung nach Fig. 4 sind jeweils Gruppen von zwei Reihen 1 dadurch gebildet, daß die Mäanderbögen 6 der zu dieser Gruppe gehörenden, einander gegenüberliegenden Mäander 3 durch gerade Brückendrähte 7 miteinander verbunden sind und die Gruppen durch an die Mäanderbögen 6 angeschlossene Brückendrähte 4 verbunden sind. Dieser Stent zeichnet sich durch besondere Stabilität aus.In the embodiment according to Fig. 4, groups of two rows 1 are formed in that the meander arches 6 of the opposing meanders 3 belonging to this group are connected to one another by straight bridge wires 7 and the groups are connected by bridge wires 4 connected to the meander arches 6. This stent is characterized by its particular stability.

Die Ausführung nach Fig. 5 entspricht im wesentlichen der Ausführung nach Fig. 4 mit der Maßgabe, daß die an den Mäanderbögen 6 angeschlossenen Brückendrähte 4, 7 gleichsam ein durchgehendes Band bilden und zwischen den Mäanderbögen 6 in Längsrichtung des Stents gewählt sind.The embodiment according to Fig. 5 corresponds essentially to the embodiment according to Fig. 4 with the proviso that the bridge wires 4, 7 connected to the meander arches 6 form a continuous band and are selected between the meander arches 6 in the longitudinal direction of the stent.

Bei der Ausführung nach Fig. 6 sind die Mäander in Umfangsrichtung des Stents derart angeordnet, daß die Mäanderbögen 6 benachbarter Reihen 1 in die gleiche Richtung weisen und auf gleicher Umfangslänge angeordnet sind. Die zwischen den Reihen 1 schlaufenartig ausgebildeten Brückendrähte 4 sind einerseits mit den Außenseiten der Mäanderbögen 6 der einen Reihe verbunden und erstrecken sich andererseits zwischen die Mäanderschenkel 5 des Mäan-In the embodiment according to Fig. 6, the meanders are arranged in the circumferential direction of the stent in such a way that the meander arches 6 of adjacent rows 1 point in the same direction and are arranged on the same circumferential length. The loop-like bridge wires 4 between the rows 1 are connected on the one hand to the outer sides of the meander arches 6 of one row and on the other hand extend between the meander legs 5 of the meander

PATENTANWALT DR. STARK · MOERSER STRASSE'i*40 · '6-47803 KREFELDPATENT ATTORNEY DR. STARK · MOERSER STRASSE'i*40 · '6-47803 KREFELD

ders 3 der benachbarten Reihe und sind mit den Innenseiten der Mäanderbögen 3 dieses Mäanders verbunden.3 of the adjacent row and are connected to the inner sides of the meander arches 3 of this meander.

Die Ausführung nach Fig. 7 beinhaltet mehrfach gewundene, S-förmige Brückendrähte 4, die durch ihre Ausgleichsfähigkeit eine hohe Beweglichkeit und Verformbarkeit des Stents erlauben.The design according to Fig. 7 includes multiple wound, S-shaped bridge wires 4, which, due to their compensating ability, allow a high degree of mobility and deformability of the stent.

Claims (11)

PATENTANWALT DR. STARK · MOERSER STRASSE*140 -'6-47803 KREFELD AnsprüchePATENT ATTORNEY DR. STARK · MOERSER STRASSE*140 -'6-47803 KREFELD Claims 1. Stent zur Stenosebehandlung, insbesondere ballonexpandierbarer Stent, aus ein Netzwerk bildenden, flexiblen Drähten, dadurch gekennzeichnet, daß in Längsrichtung des Stents nebeneinander mehrere Reihen (1) von in Umfangsrichtung des Stents mäanderförmig verlegten Drähten (2) angeordnet sind und daß Mäander (3) benachbarter Reihen (1) durch Brückendrähte (4) verbunden sind, die in Längsrichtung des Stents gekrümmt oder gewellt sind. 1. Stent for treating stenosis, in particular a balloon-expandable stent, made of flexible wires forming a network, characterized in that several rows (1) of wires (2) laid in a meandering manner in the circumferential direction of the stent are arranged next to one another in the longitudinal direction of the stent and that meanders (3) of adjacent rows (1) are connected by bridge wires (4) which are curved or corrugated in the longitudinal direction of the stent. 2. Stent nach Anspruch 1, dadurch gekennzeichnet, daß die Mäander (3) in Längsrichtung des Stents gerade Mäanderschenkel (5) aufweisen. 2. Stent according to claim 1, characterized in that the meanders (3) have straight meander legs (5) in the longitudinal direction of the stent. 3. Stent nach Anspruch 1, dadurch gekennzeichnet, daß die Mäander (3) in Längsrichtung des Stents gekrümmte Mäanderschenkel (5) aufweisen.3. Stent according to claim 1, characterized in that the meanders (3) have meander legs (5) curved in the longitudinal direction of the stent. 4. Stent nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Brückendrähte (4) an den Mäanderschenkeln (5) angeschlossen sind. 4. Stent according to one of claims 1 to 3, characterized in that the bridge wires (4) are connected to the meander legs (5). 5. Stent nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Brückendrähte (4) an den die Mäanderschenkel (5) verbindenden Mäanderbögen (6) angeschlossen sind. 5. Stent according to one of claims 1 to 4, characterized in that the bridge wires (4) are connected to the meander arches (6) connecting the meander legs (5). PATENTANWALT DR. STARK · MOERSER STRASSE'hO · '6-47803 KREFELDPATENT ATTORNEY DR. STARK · MOERSER STRASSE'hO · '6-47803 KREFELD 6. Stent nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Mäander (3) in Umf angsrichtung des Stents derart angeordnet sind, daß die Mäanderbögen (6) benachbarter Reihen (1) einander gegenüberliegen. 6. Stent according to one of claims 1 to 5, characterized in that the meanders (3) are arranged in the circumferential direction of the stent such that the meander arches (6) of adjacent rows (1) lie opposite one another. 7. Stent nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Mäander (3) in Umf angsrichtung des Stents derart angeordnet sind, daß die Mäanderbögen (6) benachbarter Reihen (1) in die gleiche Richtung weisen und auf gleicher Umfangslänge angeordnet sind.7. Stent according to one of claims 1 to 5, characterized in that the meanders (3) are arranged in the circumferential direction of the stent such that the meander arches (6) of adjacent rows (1) point in the same direction and are arranged on the same circumferential length. 8. Stent nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß alle Mäander (3) benachbarter Reihen (1) durch Brückendrähte (4) verbunden sind. 8. Stent according to one of claims 1 to 7, characterized in that all meanders (3) of adjacent rows (1) are connected by bridge wires (4). 9. Stent nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß jeder zweite Mäander (3) einer Reihe (1) durch einen Brückendraht (4) mit dem zugeordneten Mäander 9. Stent according to one of claims 1 to 8, characterized in that every second meander (3) of a row (1) is connected by a bridge wire (4) to the associated meander (3) der benachbarten Reihe (1) verbunden ist und daß die Brückendrähte (4) der folgenden Reihen (1) in Umfangsrichtung des Stents versetzt angeordnet sind.(3) of the adjacent row (1) and that the bridge wires (4) of the following rows (1) are arranged offset in the circumferential direction of the stent. 10. Stent nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß jeder dritte Mäander (3) einer Reihe (1) durch einen Brückendraht (4) mit dem zugeordneten Mäander 10. Stent according to one of claims 1 to 7, characterized in that every third meander (3) of a row (1) is connected by a bridge wire (4) to the associated meander (3) der benachbarten Reihe (1) verbunden ist und daß die Brückendrähte (4) der folgenden Reihen in Umfangsrichtung des Stents versetzt angeordnet sind.(3) of the adjacent row (1) and that the bridge wires (4) of the following rows are arranged offset in the circumferential direction of the stent. 11. Stent nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß zumindest einige Brückendrähte (4) mehrfach gewunden, wie z. B. S-förmig oder dergleichen ausgebildet sind. 11. Stent according to one of claims 1 to 10, characterized in that at least some bridge wires (4) are wound several times, such as in an S-shape or the like.
DE29805761U 1997-09-13 1998-03-30 Stenosis treatment stent Expired - Lifetime DE29805761U1 (en)

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