DE19617823A1 - Vascular prosthesis for coronary use - Google Patents

Vascular prosthesis for coronary use

Info

Publication number
DE19617823A1
DE19617823A1 DE19617823A DE19617823A DE19617823A1 DE 19617823 A1 DE19617823 A1 DE 19617823A1 DE 19617823 A DE19617823 A DE 19617823A DE 19617823 A DE19617823 A DE 19617823A DE 19617823 A1 DE19617823 A1 DE 19617823A1
Authority
DE
Germany
Prior art keywords
web
stent
patterns
stent according
cross
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.)
Ceased
Application number
DE19617823A
Other languages
German (de)
Inventor
Randolf Von Dr Ing Oepen
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.)
SITOMED MEDIZINTECHNIK VERTRIE
Original Assignee
SITOMED MEDIZINTECHNIK VERTRIE
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 SITOMED MEDIZINTECHNIK VERTRIE filed Critical SITOMED MEDIZINTECHNIK VERTRIE
Priority to DE29608037U priority Critical patent/DE29608037U1/en
Priority to DE19617823A priority patent/DE19617823A1/en
Publication of DE19617823A1 publication Critical patent/DE19617823A1/en
Ceased 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
    • 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
    • A61F2002/9155—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
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/0054—V-shaped

Abstract

The coronary prosthesis has a tubular shaped flexible body whose wall is made from a series of cross strap structures (4) which have neighbouring meandering cross-piece patterns (5,6). The neighbouring patterns are connected together by a curved hairpin cross bar (7) which has a summit pint (S). The summit points of all the connecting cross bars are orientated in the same direction. The cross-piece patterns have axes (A5,A6) which run parallel to each other.

Description

Die Erfindung betrifft einen koronaren Stent gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a coronary stent according to the Preamble of claim 1.

Unter einem koronaren Stent versteht man eine Gefäßprothese, die aus körperverträglichem Material besteht. Der Stent bzw. die Gefäßprothese wird dazu verwendet, Blutgefäße oder auch andere Körperöffnungen aufzuweiten und die Gefäße in dem aufgeweiteten Zustand zu halten, beispielsweise um Gefäß­ stenosen zu behandeln. Hierbei wird der Stent mit Hilfe eines in den Körper einführbaren Katheters an die jeweilige Position gebracht. Der Katheter weist einen aufblasbaren Ballonabschnitt auf, auf dem der Stent zum Zwecke der Anbringung im Körper angeordnet wird. Nach der Positionierung des Stents mit Hilfe des Katheders in dem aufzuweitenden Gefäßabschnitt wird der Ballonabschnitt aufgeweitet, so daß sich der Stent expandiert und dadurch den Gefäßabschnitt auf die gewünschte Größe erweitert. Hierbei verankert sich der Stent in der Gefäßwand und verbleibt im Körper des Patienten.A coronary stent is a vascular prosthesis which consists of body-compatible material. The stent or the vascular prosthesis is used to blood vessels or also other body openings and expand the vessels in the to keep expanded state, for example around a vessel to treat stenoses. This is where the stent comes in with the help a catheter that can be inserted into the body to the respective Position. The catheter has an inflatable Balloon section on which the stent for the purpose of Attachment is arranged in the body. After Position the stent with the help of the catheter in the The section of the vessel to be expanded becomes the balloon section expanded so that the stent expands and thereby expanded the vascular section to the desired size. The stent is anchored in the vessel wall and remains in the patient's body.

Ein derartiger Stent ist beispielsweise aus der WO 9603092 A1 bekannt. Die Wand des Stents besteht aus einer Stegstruktur, die im Fall des bekannten Stents parallel zueinander verlaufende mäanderartige Stegmuster aufweist, die jeweils über Stegbögen miteinander verbunden sind. Beim bekannten Stent weisen die Scheitelpunkte der Stegbögen jeweils alternierend in unterschiedliche Richtungen, sind also abwechselnd um 180° zueinander versetzt. Hieraus ergibt sich zwar eine flexible Stegstruktur der Wand des Stent-Körpers, jedoch ist die Flexibilität, insbesondere in Körperlängsrichtung, verbesserungsbedürftig.Such a stent is, for example, from WO 9603092 A1 known. The wall of the stent consists of one Bridge structure that is parallel in the case of the known stent has mutually extending meandering web patterns, which are connected to each other via web arches. At the known stent have the apex of the web arches alternately in different directions alternately offset by 180 °. From this results a flexible web structure of the wall of the Stent body, however, is flexibility, especially in Body longitudinal direction, in need of improvement.

Es ist daher Aufgabe der vorliegenden Erfindung, einen koronalen Stent der im Oberbegriff von Anspruch 1 angegebenen Art zu schaffen, dessen Flexibilität und damit Anbringbarkeit weiter verbessert ist.It is therefore an object of the present invention to coronal stent in the preamble of claim 1 specified type to create its flexibility and thus Attachability is further improved.

Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Anspruchs 1.This problem is solved by the features of Claim 1.

Dadurch wird erreicht, daß sich der erfindungsgemäße Stent beim Aufschieben auf den Ballonabschnitt eines Katheders vor allem in Längsrichtung noch besser zusammenschieben läßt, was wiederum die Anbringung des Stents an der aufzuweitenden Stelle im Körper des Patienten verbessert.It is thereby achieved that the stent according to the invention when pushed onto the balloon section of a catheter can be pushed together even better in the longitudinal direction, which in turn attaches the stent to the dilated one Body in the patient's body improved.

Die Unteransprüche haben vorteilhafte Weiterbildungen der Erfindung zum Inhalt.The subclaims have advantageous developments of Invention to the content.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus nachfolgender Beschreibung eines Ausführungsbeispiels anhand der Zeichnung.Further details, features and advantages of the invention result from the following description of a Embodiment with reference to the drawing.

Es zeigt:It shows:

Fig. 1 eine schematisch stark vereinfachte Darstellung des Grundaufbaus eines erfindungsgemäßen Stents und Fig. 1 is a schematic, highly simplified representation of the basic structure of a stent according to the invention and

Fig. 2 eine der Fig. 1 entsprechende Darstellung der Stegstruktur der Wand des Stents gemäß Fig. 1. Fig. 2 shows one of Fig. 1 representation corresponding to the web structure of the wall of the stent of FIG. 1.

Fig. 1 zeigt den grundsätzlichen Aufbau eines erfindungs­ gemäßen Stents 1, der einen flexiblen, rohrförmigen Körper 2 mit einer Wand 3 aufweist, von der in Fig. 1 die Stirn­ ansicht dargestellt ist. Fig. 1 shows the basic structure of a stent 1 according to the Invention, which has a flexible, tubular body 2 with a wall 3 , of which the front view is shown in Fig. 1.

Fig. 2 verdeutlicht den Aufbau einer Stegstruktur 4, die die Wand 3 bildet, wobei die Stegstruktur 4 jedoch in Fig. 1 zur Vereinfachung der zeichnerischen Darstellung nicht im einzelnen gezeigt ist. Daher wird nachfolgend betreffend den Aufbau der Stegstruktur 4 ausschließlich auf Fig. 2 Bezug genommen, welche den expandierten Zustand der Stegstruktur zeigt. Fig. 2 illustrates the structure of a web structure 4, which forms the wall 3, wherein the web structure 4 is not shown in Fig. 1 to simplify the drawing in detail. Therefore, with regard to the structure of the web structure 4, reference is made below to FIG. 2, which shows the expanded state of the web structure.

Die Stegstruktur 4 weist je nach Größe des Stents 1 eine Mehrzahl nebeneinander angeordneter mäanderförmig ver­ laufender Stegmuster auf, von denen in Fig. 2 repräsentativ die Stegmuster 5 und 6 mit Bezugszeichen gekennzeichnet sind. Wie in Fig. 2 verdeutlicht, verlaufen die Stegmuster 5, 6 mäanderförmig und sind derart ausgerichtet, daß ihre auf den Zylinderwandmantelflächen des Körpers 2 senkrecht stehende Achsen A₅ und A₆ parallel zueinander angeordnet sind.Depending on the size of the stent 1, the web structure 4 has a plurality of meandering web patterns arranged next to one another, of which the web patterns 5 and 6 are represented in FIG. 2 by reference numerals. As illustrated in FIG. 2, the web patterns 5 , 6 run in a meandering manner and are aligned in such a way that their axes A₆ and A₆, which are perpendicular to the cylindrical wall surfaces of the body 2 , are arranged parallel to one another.

Die Stegmuster (von denen nachfolgend repräsentativ immer nur auf die Stegmuster 5, 6 Bezug genommen wird) sind jeweils über Stegbögen 7 miteinander verbunden, wobei in Fig. 2 vier Stegbögen repräsentativ für alle Stegbögen der Stegstruktur 4 mit der Bezugsziffer 7 versehen sind.The web patterns (of which reference is made below only to the web patterns 5 , 6 ) are each connected to one another via web arches 7 , four web arches in FIG. 2 being provided with the reference number 7 representative of all web arches of the web structure 4 .

Wie sich aus der Zeichnung ergibt, sind die Stegbögen 7 erfindungsgemäß derart ausgerichtet, daß ihre Scheitelpunkte S alle in die gleiche Richtung weisen. Das bedeutet im Falle der zeichnerischen Darstellung gemäß Fig. 2, daß alle Scheitelpunkte S der Stegbögen 7 nach oben gerichtet sind, so daß die Öffnung der haarnadelartig ausgebildeten Stegbögen 7 gemäß der zeichnerischen Darstellung in Fig. 2 nach unten orientiert sind.As can be seen from the drawing, the web arches 7 are aligned according to the invention in such a way that their vertices S all point in the same direction. In the case of the graphical representation according to FIG. 2, this means that all vertices S of the web arches 7 are directed upwards, so that the opening of the hairpin-shaped web arches 7 are oriented downwards according to the graphical representation in FIG. 2.

Jedes Stegmuster 5 und 6 ist aus einer Vielzahl von Steg­ schleifen aufgebaut, die einstückig aneinander angereiht sind, um den mäandrierenden Verlauf der Stegmuster 5, 6 zu bilden. Die Stegbögen weisen jeweils geradlinige Stege und einen diese miteinander verbindenden gebogenen Stegabschnitt auf. In Fig. 2 sind repräsentativ die Stege 8, 9 und der Stegabschnitt 10 mit entsprechenden Bezugsziffern versehen. Each web pattern 5 and 6 is made up of a plurality of web loops which are lined up in one piece to form the meandering course of the web patterns 5 , 6 . The web arches each have straight webs and a curved web section connecting them to one another. In Fig. 2, the webs 8 , 9 and the web section 10 are representatively provided with corresponding reference numerals.

Hierbei ergibt der mäandrierende Verlauf, daß der Steg­ abschnitt alternierend einmal auf der einen und einmal auf der anderen Seite der jeweiligen Achse A₅ bzw. A₆ angeordnet ist.Here, the meandering course shows that the web section alternately once on one and once on the other side of the respective axis A₅ or A₆ arranged is.

Ferner zeigt Fig. 2, daß jeder Stegbogen 7 zwei Fußpunkte P₁, P₂ hat, die das dem Scheitelpunkt S jeweils gegenüber angeordnete Ende des Stegbogens bilden. Die Fußpunkte P₁, P₂ bilden hierbei die Verbindungspunkte des jeweiligen Steg­ bogens 7 mit den jeweiligen Stegschleifen benachbarter Steg­ muster 5, 6, wobei die Fußpunkte P₁, P₂ jeweils im Bereich des Stegabschnittes 10 in die jeweilige Stegschleife über­ gehen. Fig. 2 also shows that each web arch 7 has two base points P₁, P₂, which form the apex S opposite end of the web arch. The foot points P₁, P₂ form the connection points of the respective web arch 7 with the respective web loops of adjacent web patterns 5 , 6 , the foot points P₁, P₂ in the area of the web section 10 going into the respective web loop.

Der derart aufgebaute erfindungsgemäße koronare Stent 1 weist sehr gute Flexibilität in Längs- und Querrichtung auf und kann damit auf einfache und sichere Weise in dem aufzuweitenden Gefäß bzw. der aufzuweitenden Körperöffnung angebracht werden. Es ist selbstverständlich, daß der Stent 1 aus körperverträglichem Material, insbesondere Edelstahl, besteht.The coronary stent 1 according to the invention constructed in this way has very good flexibility in the longitudinal and transverse directions and can therefore be attached in a simple and safe manner in the vessel to be expanded or the body opening to be expanded. It goes without saying that the stent 1 consists of body-compatible material, in particular stainless steel.

Claims (6)

1. Koronarer Stent (1) mit einem rohrförmigen, flexiblen Körper (2), dessen Wand (3) aus einer Stegstruktur (4) besteht, die nebeneinander angeordnete mäanderartig verlaufende Stegmuster (5, 6) aufweist, die über haar­ nadelartig ausgebildete, einen Scheitelpunkt (S) aufweisende Stegbögen (7) verbunden sind, dadurch gekennzeichnet, daß die Scheitelpunkte (S) aller Stegbögen (7) in dieselbe Richtung weisen.1. Coronary stent ( 1 ) with a tubular, flexible body ( 2 ), the wall ( 3 ) of which consists of a web structure ( 4 ), which has juxtaposed meandering web patterns ( 5 , 6 ) that have a needle-like design, one Web arches ( 7 ) having apex (S) are connected, characterized in that the apex (S) of all web arches ( 7 ) point in the same direction. 2. Stent nach Anspruch 1, dadurch gekennzeichnet, daß die Stegmuster (5, 6) zumindest weitgehend parallel zuein­ ander verlaufende Achsen (A₅, A₆) haben.2. Stent according to claim 1, characterized in that the web pattern ( 5 , 6 ) have at least largely parallel to each other extending axes (A₅, A₆). 3. Stent nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Stegmuster (5, 6) aus einer Vielzahl aneinander angereihter Stegschleifen aufgebaut sind, die jeweils zwei geradlinige Stege (8, 9) und einen diese ver­ bindenden gebogenen Stegabschnitt (10) aufweisen.3. Stent according to claim 1 or 2, characterized in that the web pattern ( 5 , 6 ) are constructed from a plurality of adjacent web loops, each of which has two straight webs ( 8 , 9 ) and a curved web portion ( 10 ) binding these . 4. Stent nach Anspruch 3, dadurch gekennzeichnet, daß jeder Stegbogen (7) zwei Fußpunkte (P₁, P₂) aufweist, an denen er mit den Stegabschnitten (10) jeweiliger Stegschleifen benachbarter Stegmuster (5, 6) verbunden ist.4. Stent according to claim 3, characterized in that each web arch ( 7 ) has two base points (P₁, P₂) at which it is connected to the web sections ( 10 ) of respective web loops of adjacent web patterns ( 5 , 6 ). 5. Stent nach einem der Ansprüche 1 bis 4, dadurch gekenn­ zeichnet, daß die Stegstruktur (4) aus körperver­ träglichem Material, insbesondere Edelstahl, besteht.5. Stent according to one of claims 1 to 4, characterized in that the web structure ( 4 ) consists of body-compatible material, in particular stainless steel. 6. Stent nach einem der Ansprüche 1 bis 5, dadurch gekenn­ zeichnet, daß die geradlinigen Stege (8, 9) einen spitzen Winkel einschließen.6. Stent according to one of claims 1 to 5, characterized in that the straight webs ( 8 , 9 ) enclose an acute angle.
DE19617823A 1996-05-03 1996-05-03 Vascular prosthesis for coronary use Ceased DE19617823A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE29608037U DE29608037U1 (en) 1996-05-03 1996-05-03 Coronary stent
DE19617823A DE19617823A1 (en) 1996-05-03 1996-05-03 Vascular prosthesis for coronary use

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29608037U DE29608037U1 (en) 1996-05-03 1996-05-03 Coronary stent
DE19617823A DE19617823A1 (en) 1996-05-03 1996-05-03 Vascular prosthesis for coronary use

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DE19617823A1 true DE19617823A1 (en) 1997-11-13

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DE29608037U Ceased DE29608037U1 (en) 1996-05-03 1996-05-03 Coronary stent
DE19617823A Ceased DE19617823A1 (en) 1996-05-03 1996-05-03 Vascular prosthesis for coronary use

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