DE29708803U1 - Radial aufweitbarer Stent zur Implantierung in ein Körpergefäß im Bereich einer Gefäßverzweigung - Google Patents
Radial aufweitbarer Stent zur Implantierung in ein Körpergefäß im Bereich einer GefäßverzweigungInfo
- Publication number
- DE29708803U1 DE29708803U1 DE29708803U DE29708803U DE29708803U1 DE 29708803 U1 DE29708803 U1 DE 29708803U1 DE 29708803 U DE29708803 U DE 29708803U DE 29708803 U DE29708803 U DE 29708803U DE 29708803 U1 DE29708803 U1 DE 29708803U1
- Authority
- DE
- Germany
- Prior art keywords
- stent
- stent according
- vessel
- balloon catheter
- cavity
- 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
Links
- 238000002513 implantation Methods 0.000 title claims description 6
- 230000002792 vascular Effects 0.000 title description 3
- 239000007943 implant Substances 0.000 abstract description 4
- 210000004204 blood vessel Anatomy 0.000 abstract 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 6
- 208000037804 stenosis Diseases 0.000 description 5
- 230000036262 stenosis Effects 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 3
- 239000002872 contrast media Substances 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229940039231 contrast media Drugs 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- A61F2/856—Single tubular stent with a side portal passage
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/954—Instruments specially adapted for placement or removal of stents or stent-grafts for placing stents or stent-grafts in a bifurcation
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- 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
- A61F2002/91508—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 the meander having a difference in amplitude along the 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
- 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
- A61F2002/91516—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 the meander having a change in frequency along the 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
- 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
- A61F2002/91525—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 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
-
- 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
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)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Physics & Mathematics (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Prostheses (AREA)
- Food-Manufacturing Devices (AREA)
Description
G 9139 DE
Jomed Implantate GmbH
Rudolf-Diesel-Straße 29
72414 Rangendingen
Radial aufweitbarer Stent zur Implantierunq
in ein Körpergefäß im Bereich einer Gefäßverzweigung
Die Erfindung betrifft einen radial aufweitbaren Stent zur Implantierung
in ein Körpergefäß im Bereich einer Gefäßverzweigung
in Form eines hohlzylindrischen Elements. An Verengungsstellen in Körpergefäßen oder Körperhöhlungen werden heutzutage
zur Aufweitung der Verengung und Stabilisierung der Gefäßwand radial aufweitbare Stents eingesetzt. Solche Verengungen
von Körpergefäßen können dabei auch im Bereich von Gefäßverzweigungen auftreten. Hier ist der Einsatz herkömmlicher
Stents nicht möglich, da deren Wandung den freien Blutdurchfluß in das abzweigende Gefäß behindern würde. In der
DE 297 01 758.6 wurde daher ein spezieller Stent vorgeschlagen, der einen Abschnitt mit vergrößerten radialen Öffnungen
aufweist, so daß dieser Abschnitt über die Abzweigungsstelle des Seitenastgefäßes gelegt werden kann und den Blutdurchfluß
nicht mehr oder nur noch geringfügig behindert. Bei einer entsprechend ungünstigen Stenosenbildung des Hauptgefäßes direkt
im Abzweigungsbereich kann dieser Stent aufgrund der sich über einen ganzen Abschnitt erstreckenden großen radialen Öffnungen
den erkrankten Gefäßabschnitt jedoch nicht genügend abdecken.
G 9139 DE - 2 -
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Stent zu schaffen, der im Bereich von Gefäßverzweigungen
einsetzbar ist und dabei die obengenannten Nachteile vermeidet.
Die Aufgabe wird mit einem Stent der eingangs genannten Art gelöst, der erfindungsgemäß dadurch gekennzeichnet ist, daß er
eine vergrößerte radiale öffnung aufweist und zur Implantierung in das Gefäß auf einem Ballonkatheter vormontiert ist,
wobei der Ballonkatheter einen Hohlraum zum Hindurchführen eines Führungsdrahtes aufweist, der im Zentrum der vergrößerten
öffnung aus dem Hohlraum und dem Stent austritt. Aufgrund der lediglich einen vergrößerten Öffnung in der Stentwandung,
die direkt über die Abzweigungsstelle gelegt werden kann, wird sichergestellt, daß die gesamte Gefäßwand durch den Stent sicher
abgestützt wird. Der vergrößerten Öffnung kommt hierbei die Aufgabe zu, den ungehinderten Blutfluß in das Seitenastgefäß
zu garantieren. Zur genauen Positionierung dieses Stents sind jedoch unbedingt entsprechende Hilfsmittel nötig. Allein
aufgrund der Verwendung von Röntgenkontrastmittel ist die exakte Positionierung der einen vergrößerten öffnung über der
Abzweigung nicht möglich. Deswegen ist der erfindungsgemäße Stent auf einem Ballonkatheter vormontiert, der einen Hohlraum
für einen Führungsdraht aufweist, der durch die vergrößerte öffnung austritt. Mit Hilfe dieses Führungsdrahtes ist es möglich,
die große öffnung des Stents genau über dem Abgang des Seitengefäßes zu positionieren. Hierzu wird der Katheter durch
Drehen und Schieben unter Zugabe von Röntgenkontrastmittel und visueller Beobachtung auf dem Röntgenschirm so lange manipuliert,
bis es möglich ist, den zweiten Führungsdraht in das Seitenastgefäß einzuführen. Zur Einführung des Ballonkatheters
in das Hauptgefäß kann der Ballonkatheter in an sich bekannter Weise einen entlang seiner Längsachse verlaufenden Hohlraum
G 9139 DE - 3 -
für einen an der Spitze des Ballonkatheters austretenden ersten Führungsdraht aufweisen. Entlang dieses Führungsdrahtes
kann er problemlos bis zur Gefäßabzweigung vorgeschoben werden, bevor mit Hilfe des zweiten Führungsdrahtes die exakte
Positionierung der vergrößerten öffnung vorgenommen wird. Nachdem sichergestellt ist, daß der Katheter exakt positioniert
ist, wird der Ballon aufgeblasen, und der Stent legt sich an die Gefäßwandung an. Anschließend kann der Katheter
entlang der beiden Führungsdrähte wieder aus dem Gefäß herausgezogen werden. Der Stent verbleibt mit den beiden Drähten
im Gefäß. Über den Führungsdraht des Seitenastgefäßes kann ein
weiterer Ballonkatheter in die Verzweigung eingeführt werden, um die vergrößerte Öffnung erforderlichenfalls nachzudehnen.
Somit kann gewährleistet werden, daß kein Wandungsteil des Stents den Blutfluß in das Seitenastgefäß behindert. Für die
Ausbildung des Ballonkatheters gibt es unterschiedliche Möglichkeiten.
So kann der Hohlraum für den aus der vergrößerten öffnung herausgeführten Führungsdraht durch Befestigen eines
Röhrchens auf der Ballonoberfläche gebildet werden. Dieser Hohlraum kann jedoch auch durch den Zwischenraum eines doppelwandigen
Ballons gebildet sein. Auch das überziehen eines dehnbaren Schlauchstückes bis über den Ballon ist möglich, um
einen Hohlraum zwischen diesem übergezogenen Schlauchstück und dem Ballon für den Führungsdraht zu schaffen. Bei einer alternativen
Ausgestaltung kann der Ballonkatheter drei koaxial angeordnete Schläuche aufweisen, wobei die beiden innenliegenden
Schläuche Hohlräume zur Aufnahme der beiden Führungsdrähte bilden.
Auch der Stent selbst kann auf unterschiedliche Art und Weise
ausgebildet sein. Er kann eine multizellulare Wandung aufweisen und aus einem Rohr gefertigt sein. Aber auch das Fertigen
des Stents aus Draht ist möglich. Dabei kann er aus Draht ge-
G 9139 DE -A-
bogen, geflochten, gestrickt oder gewirkt sein. Zweckmäßigerweise
kann die vergrößerte öffnung in der Mitte des Stents angeordnet sein, jedoch ist auch eine außermittige Anordnung der
vergrößerten öffnung für bestimmte Anwendungsfälle realisierbar.
Im folgenden wird ein bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Stents anhand der Zeichnung näher beschrieben.
Es zeigen:
Fig. 1 drei schematische Darstellungen von Gefäß
verzweigungen mit Stenosen;
Fig. 2 eine Darstellung der Oberflächenstruktur
eines erfindungsgemäßen Stents;
Fig. 3 eine Seitenansicht eines auf einen Ballon
katheter vormontierten Stents.
Fig. 1 zeigt drei Beispiele typischer Stenosen, wie sie an Gefäßverzweigungen auftreten können. In Fig. la befindet sich
die Stenose 12 im Hauptgefäß 10 vor der Abzweigung eines Seitenastgefäßes 11. In Fig. Ib liegt eine sehr große Stenose 12'
direkt gegenüber der Abzweigung des Seitenastgefäßes 11 und in Fig. Ic im übergang zwischen Hauptgefäß 10 und Seitenastgefäß
11. Insbesondere die Stenose nach Fig. Ib ist mit einem Bifurkations-Stent mit einem Abschnitt mit vergrößerten radialen
öffnungen nur unzureichend abzudecken. Gerade für solche Fälle eignet sich ein erfindungsgemäßer Stent, wie er in den
Fig. 2 und 3 dargestellt ist. Fig. 2 zeigt die Oberflächenstruktur eines Stents 20, der eine Vielzahl von im gedehnten
G 9139 DE - 5 -
Zustand rautenförmigen radialen Öffnungen 21 aufweist. Im
mittleren Bereich des Stents 20 ist eine einzige, sehr große rautenförmige Öffnung 22 eingeformt, die in einem Körpergefäß
genau über die Abzweigung eines Seitenastgefäßes 11 (Fig. 1) gelegt werden kann. Zur Ermöglichung der lagegenauen Positionierung
des Stents 20 ist dieser, wie in Fig. 3 gezeigt ist, auf einem Ballonkatheter 30 vormontiert. Der in Fig. 3 gezeigte
Ballonkatheter 30 weist in seinem Inneren einen nicht näher dargestellten Hohlraum zum Durchführen eines ersten Führungsdrahtes
31 auf. Im Bereich eines Ballons 32 des Katheters 30 ist ein Stent 20 aufgezogen. Bis in den Bereich des Ballons 32
erstreckt sich außerdem ein weiterer Hohlraum 33 zum Hindurchführen eines zweiten Führungsdrahtes 34, der im Bereich der
vergrößerten Öffnung 22 aus dem Hohlraum 33 und aus dem Stent 20 austritt. Dieser Führungsdraht 34 wird in ein Seitenastgefäß
11 eingeführt und dient somit als Justierhilfe für die Positionierung des Stents 20 in einem Körpergefäß 10. Er
kann außerdem, nach Herausziehen des Ballonkatheters 30 aus dem Gefäß 10, als Führungsdraht für einen weiteren Ballonkatheter
zur Weitung der vergrößerten Öffnung 22 eingesetzt werden. Die dargestellten Ausführungsformen des Ballonkatheters
30 sowie des Stents 20 sind lediglich beispielhaft. Der
notwendige Hohlraum 33 zur Durchführung des zweiten Führungsdrahtes 34 kann beispielsweise auch durch einen doppelwandigen
Ballon 32 oder zwei koaxiale Schlauchstücke gebildet werden. Der dargestellte Stent 20 ist aus einem Röhrchen geschnitten;
er kann jedoch auch aus Draht gebogen, gestrickt, geflochten oder gewirkt werden.
Claims (12)
1. Radial aufweitbarer Stent zur Implantierung in ein Körpergefäß im Bereich einer Gefäßverzweigung in Form eines
hohlzylindrischen Elements, dadurch gekennzeichnet, daß er eine vergrößerte radiale öffnung (22) aufweist und zur
Implantierung in das Gefäß (10) auf einem Ballonkatheter (30) vormontiert ist, wobei der Ballonkatheter (30)
einen Hohlraum (33) zum Hindurchführen eines Führungsdrahtes (34) aufweist, der im Zentrum der vergrößerten öffnung
(22) aus dem Hohlraum (33) und dem Stent (20) austritt.
2. Stent nach Anspruch 1, dadurch gekennzeichnet, daß der Ballonkatheter (30) einen entlang seiner Längsachse verlaufenden
Hohlraum für einen an der Spitze des Ballonkatheters (30) austretenden Führungsdraht (31) aufweist.
3. Stent nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der Ballonkatheter (30) nach der Dilatation des
Stents (20) entlang der beiden Führungsdrähte (31, 34) aus dem Gefäß (10) herausziehbar ist.
4. Stent nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,
daß der Hohlraum (33) für den aus der vergrößerten Öffnung (22) herausgeführten Führungsdraht (34) durch
Befestigen eines Röhrchens auf der Ballonoberfläche gebildet
wird.
G 9139 DE - 7 -
5. Stent nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,
daß der Hohlraum (33) für den aus der vergrößerten öffnung (22) herausgeführten Führungsdraht {34) durch
den Zwischenraum eines doppelwandigen Ballons (32) gebildet wird.
6. Stent nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,
daß der Hohlraum (33) für den aus der vergrößerten Öffnung (22) herausgeführten Führungsdraht (34) durch
den Zwischenraum eines über den Ballon (32) gezogenen, dehnbaren Schlauchstücks und dem Ballon (32) gebildet
wird.
7. Stent nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,
daß der Ballonkatheter (30) drei koaxial angeordnete Schläuche aufweist, wobei die beiden innenliegenden
Schläuche Hohlräume zur Aufnahme der beiden Führungsdrähte (31, 34) bilden.
8. Stent nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet,
daß er aus einem Rohr gefertigt ist und eine multizellulare Wandung aufweist.
9. Stent nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet,
daß er aus Draht gebogen ist.
10. Stent nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet,
daß er aus Draht geflochten, gestrickt oder gewirkt ist.
11. Stent nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet,
daß die vergrößerte öffnung (22) in der Stent-Mitte
angeordnet ist.
G 9139 DE - 8 -
12. Stent nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet,
daß die vergrößerte öffnung (22) außermittig am Stent (20) angeordnet ist.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29708803U DE29708803U1 (de) | 1997-05-17 | 1997-05-17 | Radial aufweitbarer Stent zur Implantierung in ein Körpergefäß im Bereich einer Gefäßverzweigung |
ES98108486T ES2172056T3 (es) | 1997-05-17 | 1998-05-09 | Combinacion de un dilatador radialmente dilatable para la implantacion en la zona bifurcada de un vaso corporal con un cateter de balon. |
DE59803168T DE59803168D1 (de) | 1997-05-17 | 1998-05-09 | Kombination aus einem radial aufweitbaren Stent zur Implantierung in ein Körpergefäss im Bereich einer Gefässverzweigung und einem Ballonkatheter |
EP98108486A EP0884028B1 (de) | 1997-05-17 | 1998-05-09 | Kombination aus einem radial aufweitbaren Stent zur Implantierung in ein Körpergefäss im Bereich einer Gefässverzweigung und einem Ballonkatheter |
AT98108486T ATE213612T1 (de) | 1997-05-17 | 1998-05-09 | Kombination aus einem radial aufweitbaren stent zur implantierung in ein körpergefäss im bereich einer gefässverzweigung und einem ballonkatheter |
US09/078,956 US6048361A (en) | 1997-05-17 | 1998-05-14 | Balloon catheter and multi-guidewire stent for implanting in the region of branched vessels |
JP16907598A JP2909899B2 (ja) | 1997-05-17 | 1998-05-14 | 血管分岐の範囲で身体血管へ埋込むため放射状に拡張可能なステント |
CA002237829A CA2237829C (en) | 1997-05-17 | 1998-05-15 | Radially expandable stent for implanting in a body vessel in the area of a vascular branch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29708803U DE29708803U1 (de) | 1997-05-17 | 1997-05-17 | Radial aufweitbarer Stent zur Implantierung in ein Körpergefäß im Bereich einer Gefäßverzweigung |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29708803U1 true DE29708803U1 (de) | 1997-07-31 |
Family
ID=8040498
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29708803U Expired - Lifetime DE29708803U1 (de) | 1997-05-17 | 1997-05-17 | Radial aufweitbarer Stent zur Implantierung in ein Körpergefäß im Bereich einer Gefäßverzweigung |
DE59803168T Expired - Lifetime DE59803168D1 (de) | 1997-05-17 | 1998-05-09 | Kombination aus einem radial aufweitbaren Stent zur Implantierung in ein Körpergefäss im Bereich einer Gefässverzweigung und einem Ballonkatheter |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE59803168T Expired - Lifetime DE59803168D1 (de) | 1997-05-17 | 1998-05-09 | Kombination aus einem radial aufweitbaren Stent zur Implantierung in ein Körpergefäss im Bereich einer Gefässverzweigung und einem Ballonkatheter |
Country Status (7)
Country | Link |
---|---|
US (1) | US6048361A (de) |
EP (1) | EP0884028B1 (de) |
JP (1) | JP2909899B2 (de) |
AT (1) | ATE213612T1 (de) |
CA (1) | CA2237829C (de) |
DE (2) | DE29708803U1 (de) |
ES (1) | ES2172056T3 (de) |
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US9339402B2 (en) | 2005-04-18 | 2016-05-17 | TriReme Medical, LLC | Apparatus and methods for delivering prostheses to luminal bifurcations |
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US10123893B2 (en) | 2013-10-09 | 2018-11-13 | Lilong Tang | Prewire channel stent |
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Also Published As
Publication number | Publication date |
---|---|
ES2172056T3 (es) | 2002-09-16 |
JPH1157017A (ja) | 1999-03-02 |
ATE213612T1 (de) | 2002-03-15 |
DE59803168D1 (de) | 2002-04-04 |
EP0884028A1 (de) | 1998-12-16 |
EP0884028B1 (de) | 2002-02-27 |
US6048361A (en) | 2000-04-11 |
CA2237829C (en) | 2006-11-28 |
JP2909899B2 (ja) | 1999-06-23 |
CA2237829A1 (en) | 1998-11-17 |
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