DE19532846A1 - Ventileinrichtung - Google Patents
VentileinrichtungInfo
- Publication number
- DE19532846A1 DE19532846A1 DE1995132846 DE19532846A DE19532846A1 DE 19532846 A1 DE19532846 A1 DE 19532846A1 DE 1995132846 DE1995132846 DE 1995132846 DE 19532846 A DE19532846 A DE 19532846A DE 19532846 A1 DE19532846 A1 DE 19532846A1
- Authority
- DE
- Germany
- Prior art keywords
- flap
- valve device
- sail
- catheter
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2418—Scaffolds therefor, e.g. support stents
-
- 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
- A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
- A61F2210/0019—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0008—Fixation appliances for connecting prostheses to the body
- A61F2220/0016—Fixation appliances for connecting prostheses to the body with sharp anchoring protrusions, e.g. barbs, pins, spikes
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0075—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
Description
Die Erfindung bezieht sich auf eine Ventileinrichtung zum
Einsetzen in ein Hohlorgan, ein Gefäß oder dergleichen, mit einer
künstlichen Gefäßklappe, insbesondere einer Taschenklappe, die
mehrere, im Umriß in Flachlage dreieckige Einzeltaschen oder
Einzelsegel, die in Funktionsstellung in Umfangsrichtung aneinander
grenzen, aufweist.
Eine solche Ventileinrichtung kann insbesondere zum Ersetzen einer
Herzklappe mit Hilfe eines Kathetersystems dienen.
Die Segel der Herzklappen haben eine Ventilfunktion. Kommt es
zu krankhaften Veränderungen dieser Segelklappen, so ergeben sich
Strömungsverhältnisse, die kurz- und langfristig Herzschädigungen
verursachen mit entsprechend schweren Auswirkungen auf den
Gesamtorganismus.
Bisherige Lösungen des Problems der insuffizienten Klappe bestehen
in einer medikamentellen Beeinflussung oder im chirurgischen Ersatz
der Klappen mit Hilfe der Herz-Lungen-Maschine.
Nicht-chirurgische Lösungsansätze für dieses Problem ergeben sich
aus der PCT-WO 91/17720 und der PCT-W 93/01768.
Aufgabe der vorliegenden Erfindung ist es, eine Ventileinrichtung
oder dergleichen zu schaffen, die mit Hilfe einer nicht-operativen
Vorgehensweise das Einsetzen einer Ventileinrichtung beziehungs
weise den Ersatz der Herzklappe ermöglicht.
Zur Lösung dieser Aufgabe wird erfindungsgemäß insbesondere
vorgeschlagen, daß die Gefäßklappe aus mehreren, separaten
Einzelsegeln zusammengesetzt ist, die jeweils Anschlußstellen
zum gelenkigen Verbinden mit der Gefäßwand oder dergleichen an
der Einsatzstelle aufweisen und daß die Einzelsegel eine Halterung
mit einem Faltmechanismus zum Zusammenfalten der Einzelsegel für
das Einbringen durch ein Gefäß an die Einsatzstelle und dort
zum Auffalten der Segel hat.
Durch den Aufbau der Ventileinrichtung aus mehreren Einzelbau
gruppen, insbesondere Einzelsegeln, ergeben sich für diese
Einzelteile erheblich reduzierte Außenabmessungen, so daß sie
einzeln wesentlich einfacher einführbar und auch einfacher an
den Einsatzort transportierbar sind.
Vorzugsweise sind die Anschlußstellen der Einzelsegel-Halterung
zum gelenkigen Verbinden mit einem an der Einsatzstelle
verankerten Stent ausgebildet, insbesondere zum Einhaken bei diesem
Stent.
An der Einsatzstelle werden die Einzelsegel jeweils nach
Positionierung und Verankerung aufgefaltet beziehungsweise
aufgeweitet. Es ist dabei vorgesehen, daß in einem ersten
Arbeitsgang zunächst der entsprechend modifizierte Gefäßstent
nach Palmaz als Verankerungsring eingeführt wird. In einem zweiten
Arbeitsgang wird dann die Ventileinrichtung, d. h. die einzelnen
Segel der Herzklappe gesondert positioniert und am Stent
verankert.
Nach einer anderen Ausführungsform der Erfindung besteht auch
die Möglichkeit, den Stent zusammen mit den einzelnen Klappense
geln bzw. den Klappensegel-Halterungen auf einmal zur Einsatzstelle
zu bringen.
Dazu ist zum Einführen der Ventileinrichtung ein Katheter
vorgesehen, der am proximalen Endbereich Befestigungsmittel zum
Anbringen von in Umfangsrichtung und Längsrichtung verteilt
angebrachten, also hintereinandergeschalteten Klappensegeln
beziehungsweise Klappensegel-Halterungen aufweist, wobei am freien
Ende des Katheters vorzugsweise ein Ballon zum Haltern des Stents
vorgesehen ist.
Zweckmäßigerweise ist dabei am Katheter im Bereich der Be
festigungsmittel für die Klappensegel-Halterungen eine über diese
verschiebbare, äußere Hülle vorgesehen ist, die zum Freigeben
und Verbinden der einzelnen Klappensegel-Halterungen mit dem Stent
oder dergleichen in Richtung zum äußeren Ende des Katheters
zurückziehbar ist und daß der Querschnitt des Katheters im
Halterungsbereich für die Klappensegel-Halterungen kleiner ist
als der lichte Durchtrittsquerschnitt des aufgeweiteten,
verankerten Katheters.
Mit Hilfe dieses Katheters werden alle drei Klappensegel mit ihren
Halterungen und dem Stent auf einmal eingeführt und an der
Einsatzstelle wird dann zunächst der Stent verankert und
anschließend werden nacheinander bei gleichzeitigem Zurückziehen
der äußeren Schutzhülle die Klappensegel mit Halterung freigegeben
bzw. soweit freigegeben, daß sie mit ihren Einfädelenden
freiliegen und auf den Stent aufgeschoben werden können. Die
Schutzhülle wird dann immer weiter zurückgezogen bis auch das
dritte Klappensegel mit Halterung freigegeben und auf den Stent
aufgeschoben werden kann.
Eine bevorzugte Ausführungsform der Erfindung sieht vor, daß die
Einzelsegel-Halterung an einem Ende miteinander verbundene
Spannbügel aufweist, die entlang der beiden Längsseiten des
jeweiligen Segels verlaufen und dort mit den Rändern des Segels
verbunden sind und daß die beiden Spannbügel zwischen einer
Zusammenfaltlage mit etwa parallel verlaufenden Spannbügeln und
einer Aufspreizlage mit V-förmiger Stellung der Spannbügel
verstellbar sind.
In der Zusammenfaltlage ergeben sich nur vergleichsweise geringe
Außenabmessungen, insbesondere ein kleiner Querschnitt, so daß
die Einzelsegel mit Halterung mit Hilfe eines Katheters gut an
die Herz-nahe Einsatzstelle gebracht werden können.
Zusätzliche Ausgestaltungen der Erfindung sind in den weiteren
Unteransprüchen aufgeführt. Nachstehend ist die Erfindung mit
ihren wesentlichen Einzelheiten anhand der Zeichnungen näher
erläutert. Es zeigt stärker schematisiert:
Fig. 1 eine schematische Querschnitts-Ansicht mit in der Aorta
angeordneter Ventileinrichtung,
Fig. 2 eine Seitenansicht eines in komprimierter Lage gezeigten
Klappen-Segels, und
Fig. 3 eine Seitenansicht eines in Spreizlage befindlichen
Klappen-Segels.
Die Ventileinrichtung 100 (Fig. 1) weist drei Klappensegel 4 auf,
die in Funktionsstellung in Umfangsrichtung aneinander grenzen.
Die Klappensegel 4 bestehen aus einem klammerartigen Gebilde aus
Metall oder Kunststoff. An den äußeren Schenkeln 3, 3a sind
Perforationen beziehungsweise Ösen angebracht, ebenfalls am unteren
Bereich des Innenbügels 11 und mit deren Hilfe wird die
biologische oder die Kunststoffklappe aufgenäht. An der oberen
Windung 5 sind federnde Aufrollungen vorgesehen, die die äußeren
Streben der Klammer nach dem Entfernen aus der Schutzhülse auf
eine gewünscht spezifische Weite auseinanderdrückt. Die Enden
der Klammer sind spitz oder auch mit Widerhaken versehen und
können mit Hilfe des Memory-Effektes sich nach außen drehend in
die Gefäßwand eindringend eine zusätzliche Brems- und Fixierwirkung
der Einrichtung erzeugen.
Nach dem Herausstoßen aus der Schutzhülse werden die Außenschenkel
der Klammer der Rundung der Aorta angepaßt, mit Hilfe eines
inovasiven Spreizers oder auch mit Hilfe des Memory-Effektes
geweitet. Nach dieser Spreizung wird die einzelne Segelklappe
funktionsfähig.
Beim Einsetzen der Ventileinrichtung wird zunächst der Halterungs
ring 2 (Stent nach Palmaz) mit einem Katheter in die beabsichtigte
Position am Ende der Aorta 1 eingebracht und mit einem Ballon
gedehnt.
Der Halterungsring 2 ist ein modifizierter Stent nach Palmaz,
der am Ende mit Spitzen versehen ist, die sich beim Aufdehnen
in die Schleimhaut einsenken und so eine Primärfixation bewirken.
Außerdem weist dieser modifizierte Palmaz-Stent Aussparungen im
Gitternetz auf, die als radiologische Orientierungshilfen beim
Einbringen der Klappensegel dienen.
In Fig. 2 ist die komprimierte Vorrichtung mit dem aufgenähten
Klappensegel 4 dargestellt. Die Vorrichtung beginnt links unten
mit dem Verankerungsdorn 10 und setzt sich fort in zwei
Spreizbügel 3, 3a, die über eine Zwischenwindung 5 miteinander
verbunden sind. In diesen Spreizbügeln 3, der Zwischenwindung
5 und dem oberen Teil des Innenbügels 11 befinden sich mehrere
Verbindungsstellen 8, die die Haltefäden 9 aufnehmen und das
komprimierte Klappensegel fixieren.
Über die Retraktionswindung 12 geht die Vorrichtung über in den
Innenbügel 11 und das Einfädelende 6 und endet mit dem gegenseiti
gen Verankerungsdorn 10.
In Fig. 3 ist die gespreizte Vorrichtung dargestellt, nachdem
sie röntgenologisch positioniert und aus der Schutzhülse des
Gefäßkatheters herausgeschoben wurde. Dabei wird der Innenbügel
11 mit Hilfe des Einfädelendes 6 hinter den Stent 2 geschoben
und so auf dem Stent fixiert. Auch die Zwischenwindung 5 kann
zusätzlich zum Einrasten auf den Stent 2 benutzt werden. Der
Spreiz- und Spannbügel 3 öffnet sich nach dem Entlassen aus der
Schutzhülse des Katheters aufgrund der Federspannung der
Zwischenwindung 5 und bringt das komprimierte Klappensegel 4 in
seinen gespannten und geweiteten Funktionszustand, wobei sich
die Längsseiten 7 der einzelnen Segel überlappen. Nach dem Öffnen
dringen die Verankerungsdorne 10 in die oberflächliche Aortenwand
1 ein und bewirken eine Zusatzfixation. Wird eines der Klappense
gel insuffizient, werden die Verankerungsdorne mit Hilfe einer
endovasiven Gefäßzange komprimiert und an der Retraktionswindung
12 herausgezogen und aus dem Körper entfernt.
Anstatt die einzelnen Klappensegel 4 zusammen mit ihrer jeweiligen
klammerartigen Halterung 13 nacheinander an die Einsatzstelle
zu bringen, besteht auch noch die Möglichkeit, mit einem speziell
ausgebildeten Katheter die Halterungen mit Klappensegeln in
Umfangsrichtung um 120 Grad versetzt (bei drei Klappsegeln) und
zusätzlich auch in Längsrichtung versetzt am Ende dieses Katheters
anzubringen und diese Baugruppen zusammen auf einmal zur
Einsatzstelle einzubringen.
Über die Anordnung der zueinander versetzten Klappensegel 4 mit
ihren Halterungen 13 ist eine Sicherheitshülse geschoben, damit
die Klappensegel mit ihren Halterungen beim Einführen des
Katheters nicht verschoben werden. Eine Vorfixierung am Ende des
Katheters kann beispielsweise durch Magnetkraft erfolgen. Proximal
zu den Befestigungsmitteln für die Halterungen 13 und die
Klappensegel 4 befindet sich dann am freien Ende des Katheters
ein Ballon, auf den der Stent aufgeschoben und gehalten ist.
Nach dem Einführen des Katheters mit allen drei Klappsegeln mit
Halterungen und Stent, wird an der Einsatzstelle dann zunächst
der Stent verankert und anschließend werden nacheinander bei
gleichzeitigem Zurückziehen der äußeren Schutzhülle die
Klappensegel mit Halterung freigegeben bzw. jeweils soweit
freigegeben, daß sie mit ihren Einfädelenden 6 freiliegen und
auf den Stent 2 aufgeschoben werden können. Die Schutzhülle wird
dann immer weiter zurückgezogen bis auch das dritte Klappensegel
mit Halterung freigegeben und auf den Stent aufgeschoben werden
kann.
Nach dem Aufweiten des Stents mit dem Ballon ist das Lumen des
Stents 2 so groß, daß die nachfolgenden Klappensegel-Halterungen,
die außen an der Katheterhalterung angebracht sind, soweit
vorgeschoben werden können, daß jeweils nacheinander die
Klappensegel-Halterungen an dem Stent in Eingriff kommen. Durch
die in Umfangsrichtung um 120 Grad versetzte Lage der
Klappensegel-Halterungen (bei drei Klappensegeln) kommen diese
beim Vorschieben automatisch in richtiger Position beim Stent
in Eingriff und verbinden sich mit diesem. An dem Stent könnte
randseitig auch jeweils um 120 Grad versetzt eine Einführhilfe
und Zentrierhilfe vorgesehen sein, damit auch bei einer relativen
Verdrehung des Katheters zum gesetzten Stent ein exaktes
Positionieren der Klappensegel-Halterungen möglich ist.
Claims (18)
1. Ventileinrichtung zum Einsetzen in ein Hohlorgan, ein Gefäß
oder dergleichen, mit einer künstliche Gefäßklappe,
insbesondere Taschenklappe, die mehrere, im Umriß in
Flachlage dreieckige Klappensegel, die in Funktionsstellung
in Umfangsrichtung aneinandergrenzen, aufweist, dadurch
gekennzeichnet, daß die Gefäßklappe aus mehreren separaten
Klappensegeln (4) zusammengesetzt ist, die jeweils Anschluß
stellen zum gelenkigen Verbinden mit der Gefäßwand oder
dergleichen an der Einsatzstelle aufweisen und daß die
Klappensegel (4) eine Halterung (13) mit einem Faltmecha
nismus zum Zusammenfalten der Klappensegel für das Einbringen
durch ein Gefäß an die Einsatzstelle und dort zum Auffalten
der Segel hat.
2. Ventileinrichtung nach Anspruch 1, dadurch gekennzeichnet,
daß sich die Anschlußstellen an der Klappensegel-Halterung
(13) befinden.
3. Ventileinrichtung nach Anspruch 1 oder 2, dadurch gekenn
zeichnet, daß die Klappensegel-Halterung (13) an einem Ende
miteinander verbundene Spannbügel (3, 3a) aufweist, die
entlang der beiden Längsseiten des jeweiligen Segels (4)
verlaufen und dort mit den Rändern des Segels verbunden sind
und daß die beiden Spannbügel (3, 3a) zwischen einer
Zusammenfaltlage mit etwa parallel verlaufenden Spannbügeln
und einer Aufspreizlage mit V-förmiger Stellung der
Spannbügel verstellbar sind.
4. Ventileinrichtung nach einem der Ansprüche 1 bis 3, dadurch
gekennzeichnet, daß die Klappensegel-Halterung (13) zumindest
bereichsweise aus Runddraht besteht.
5. Ventileinrichtung nach einem der Ansprüche 1 bis 4, dadurch
gekennzeichnet, daß die Spann- und Spreizbügel (3, 3a) der
Klappensegel-Halterung (13) vorzugsweise elastisch biegbar
miteinander verbunden sind und daß in ihrem Verbindungs
bereich wenigstens eine Zwischenwindung (5) vorgesehen ist.
6. Ventileinrichtung nach einem der Ansprüche 1 bis 5, dadurch
gekennzeichnet, daß die Klappensegel-Halterung (13) mit ihren
Spannbügeln (3, 3a) und der oder den Anschlußstellen zum
Verbinden mit der Gefäßwand oder dergleichen aus einem Stück
Draht gebogen ist.
7. Ventileinrichtung nach einem der Ansprüche 1 bis 6, dadurch
gekennzeichnet, daß die Spannbügel (3, 3a) im Verlauf ihrer
Längserstreckung Verbindungsstellen (8) für das Klappensegel
(4) aufweisen, die insbesondere durch mehrere, zueinander
beabstandete Löcher zum Durchfädeln von Haltefäden (9)
gebildet sind und daß die Spannbügel (3, 3a) im Bereich der
Verbindungsstellen vorzugsweise abgeplattet sind.
8. Ventileinrichtung nach einem der Ansprüche 1 bis 7, dadurch
gekennzeichnet, daß zumindest einer der Spannbügel (3a) an
seinem freien Ende zur Bildung der Anschlußstelle als Haken
oder Öse mit sich bei einer Einführöffnung überlappenden
Schenkeln ausgebildet ist.
9. Ventileinrichtung nach einem der Ansprüche 1 bis 8, dadurch
gekennzeichnet, daß einer der überlappenden Schenkel durch
das freie Ende des Hakens oder der Öse und der andere
Schenkel durch einen Teilbereich des zugehörigen Spannbügels
gebildet ist.
10. Ventileinrichtung nach einem der Ansprüche 1 bis 9, dadurch
gekennzeichnet, daß der Haken oder die Öse ringbügelartig
ausgebildet ist und sich über einen Großteil der Länge des
Spannbügels erstreckt.
11. Ventileinrichtung nach einem der Ansprüche 1 bis 10, dadurch
gekennzeichnet, daß das zwischen den beiden Spannbügeln
innenliegende Ende des ringbügelartigen Hakens als Ein
fädelende (6) ausgebildet ist und einen gerundeten Verlauf,
gegebenenfalls mit einer seitlichen Auslenkung aufweist.
12. Ventileinrichtung nach einem der Ansprüche 1 bis 11, dadurch
gekennzeichnet, daß zumindest die Verbindungsstelle der
Spannbügel der Klappensegel-Halterung (13), vorzugsweise
die Zwischenwindung (5), aus Memorymetall (Formerinnerungs
metall) besteht.
13. Ventileinrichtung nach einem der Ansprüche 1 bis 12, dadurch
gekennzeichnet, daß die Anschlußstellen der Klappensegel-
Halterung (13) zum gelenkigen Verbinden mit einem an der
Einsatzstelle verankerten Stent (2) ausgebildet sind,
insbesondere zum Einhaken bei diesem Stent.
14. Ventileinrichtung nach einem der Ansprüche 1 bis 13, dadurch
gekennzeichnet, daß die Klappensegel (4) aus biologischem
Material, vorzugsweise aus Schweineklappen, gegebenenfalls
aus Kunststoff bestehen.
15. Ventileinrichtung nach einem der Ansprüche 1 bis 14, dadurch
gekennzeichnet, daß das Klappensegel mit Halterung in
zusammengefalteten Zustand im Querschnitt kleiner als 6 mm
ist.
16. Ventileinrichtung nach einem der Ansprüche 1 bis 15, dadurch
gekennzeichnet, daß am freien Ende eines der Spannbügel (3)
ein Verankerungsdorn (10), gegebenenfalls mit Widerhaken
oder dergleichen zum Verankern in der Gefäßwand vorgesehen
ist.
17. Katheter zum Einführen einer Ventileinrichtung nach einem
der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß der
Katheter am proximalen Endbereich Befestigungsmittel zum
Anbringen von in Umfangsrichtung und Längsrichtung verteilt
angebrachten Klappensegel-Halterungen (13) aufweist und daß
am freien Ende des Katheters vorzugsweise ein Ballon zum
Haltern eines Stents (2) vorgesehen ist.
18. Katheter nach Anspruch 17, dadurch gekennzeichnet, daß am
Katheter im Bereich der Befestigungsmittel für die Klappense
gel-Halterungen eine über diese verschiebbare, äußere Hülle
vorgesehen ist, die zum Freigeben und Verbinden der einzelnen
Klappensegel-Halterungen mit dem Stent oder dergleichen in
Richtung zum äußeren Ende des Katheters zurückziehbar ist
und daß der Querschnitt des Katheters im Halterungsbereich
für die Klappensegel-Halterungen kleiner ist als der lichte
Durchtrittsquerschnitt des aufgeweiteten, verankerten
Katheters.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995132846 DE19532846A1 (de) | 1995-09-06 | 1995-09-06 | Ventileinrichtung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995132846 DE19532846A1 (de) | 1995-09-06 | 1995-09-06 | Ventileinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19532846A1 true DE19532846A1 (de) | 1997-03-13 |
Family
ID=7771374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1995132846 Withdrawn DE19532846A1 (de) | 1995-09-06 | 1995-09-06 | Ventileinrichtung |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19532846A1 (de) |
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