FR2788217A1 - Valvule prothetique implantable par catheterisme, ou chirurgicalement - Google Patents
Valvule prothetique implantable par catheterisme, ou chirurgicalement Download PDFInfo
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- FR2788217A1 FR2788217A1 FR9900416A FR9900416A FR2788217A1 FR 2788217 A1 FR2788217 A1 FR 2788217A1 FR 9900416 A FR9900416 A FR 9900416A FR 9900416 A FR9900416 A FR 9900416A FR 2788217 A1 FR2788217 A1 FR 2788217A1
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- prosthetic valve
- valve
- valve according
- expandable structure
- stiffeners
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- 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
- A61F2/02—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
-
- 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
- A61F2/2427—Devices for manipulating or deploying heart valves during implantation
- A61F2/243—Deployment by mechanical expansion
- A61F2/2433—Deployment by mechanical expansion using balloon catheter
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Valvule prothétique implantable par cathétérisme, ou chirurgicalement, comportant une structure rigide expansible (2) et une structure valvulaire (3) solidarisée à la structure expansible (2) et apte à être déformée pour passer alternativement d'un état ouvert à un état fermé.La structure valvulaire (3) est solidarisée à une extrémité de la structure expansible (2), et s'étend extérieurement à celle-ci.
Description
La présente invention a pour objet une valvule prothétique implantable par
cathétérisme, ou chirurgicalement. Dans le cas d'une sténose, c'est-à-dire le rétrécissement d'un orifice organique, il est nécessaire d'intervenir pour supprimer ce rétrécissement, et lorsque la sténose intervient au niveau d'une valvule, celle-ci doit
être remplacée chirurgicalement par une valvule prothétique.
On connaît notamment la sténose aortique, laquelle peut résulter d'une fibrose et d'une calcification des valves sigmoïdes, et qui nécessite une exérèse de l'appareil valvulaire aortique et son remplacement par une
valvule prothétique.
Une valvule prothétique est actuellement implantée chirurgicalement. Toutefois certains patients ne peuvent pas être opérés, particulièrement en raison de leur âge avancé, en sachant que la sténose aortique atteint
principalement les personnes âgées.
Pour pallier cet inconvénient il a été proposé
d'implanter la valvule prothétique par cathétérisme, c'est-
à-dire de l'amener jusqu'au coeur par la voie artérielle, en passant par l'artère fémorale jusqu'à l'aorte sans ouvrir le thorax. Une valvule prothétique implantable par cathétérisme est décrite dans le document EP O 850 607, elle comprend une structure expansible et une structure valvulaire. La structure expansible consiste en un treillis de fils métalliques, de préférence en acier, présentant une forme tubulaire dont l'expansion, dans le sens radial sous l'action d'une pression, lui permet d'atteindre un diamètre prédéterminé, qui de plus correspond à une rigidité optimale dudit treillis. La structure expansible est destinée à être positionnée à l'emplacement de la valvule sténosée, et à y
être bloquée par son expansion.
La structure valvulaire est de forme tronco-
hyperbolique et est réalisée en un tissu souple et résistant. Elle est solidarisée par son extrémité de plus grand diamètre à la paroi interne de la structure expansible, sensiblement dans la région médiane de cette dernière, ou à proximité d'une extrémité de celle-ci pour s'étendre à l'intérieur. Plus précisément, la structure valvulaire est solidaire d'un enveloppe tubulaire qui recouvre la paroi interne de la structure expansible et qui
assure l'étanchéité de celle-ci.
Ainsi, la structure valvulaire peut être déformée pour passer alternativement d'un état fermé à un état ouvert dans la structure expansible, c'est-à-dire que son extrémité de plus petit diamètre peut être évasée ou resserrée, pour alternativement, s'ouvrir et laisser passer
un flux et obturer l'orifice pour éviter une régurgitation.
En outre, pour guider son mouvement lors du passage de l'état ouvert à l'état fermé, la structure
valvulaire présente des renforts longitudinaux préformés.
En pratique, après un élargissement de la sténose au moyen d'un ballonnet acheminé par voie artérielle, la valvule prothétique est amenée par la même voie jusqu'à ladite sténose, puis on réalise l'expansion de la structure expansible par le gonflement puissant d'un ballonnet placé à l'intérieur de celle-ci. La structure expansible est ainsi solidement ancrée, dans sa configuration la plus rigide, et la structure valvulaire est fonctionnelle. Or cette valvule prothétique présente un inconvénient. En effet, lors du gonflement du ballonnet, sachant que la pression nécessaire à l'expansion de la structure expansible est de l'ordre de 4 bars, la structure valvulaire est fortement susceptible d'être endommagée en étant plaquée contre ladite structure expansible, ce qui peut se traduire par le percement ou le déchirement du
tissu.
D'autre part, la structure valvulaire étant rapportée sur l'enveloppe, cette solidarisation n'est pas fiable dans le temps, il peut survenir une séparation du fait du mouvement de ladite structure valvulaire par rapport
à ladite enveloppe.
La présente invention a pour but de proposer une valvule prothétique permettant de remédier à ces divers inconvénients, et plus particulièrement un perfectionnement
à la valvule prothétique précédemment décrite.
La valvule prothétique objet de la présente invention comporte une structure rigide expansible et une structure valvulaire solidarisée à ladite structure expansible et apte à être déformée pour passer alternativement d'un état ouvert à un état fermé, et elle se caractérise en ce que ladite structure valvulaire est solidarisée à une extrémité de ladite structure expansible,
et s'étend extérieurement à celle-ci.
Selon une caractéristique additionnelle de la valvule prothétique selon l'invention, la structure expansible comporte un treillis de fils métalliques
présentant une forme tubulaire.
Selon une autre caractéristique additionnelle de la valvule prothétique selon l'invention, la structure expansible dans sa configuration déployée présente dans sa région médiane un diamètre inférieur à ceux des bords
extrêmes.
Selon une autre caractéristique additionnelle de la valvule prothétique selon l'invention, la structure
valvulaire consiste en une pièce de forme tronco-
hyperbolique, réalisée en un tissu souple et résistant, et est solidarisée à la structure expansible par son extrémité
de plus grand diamètre.
Selon une autre caractéristique additionnelle de la valvule prothétique selon l'invention, la structure expansible comporte une enveloppe qui la recouvre intérieurement, faite d'un tissu souple et résistant, et à une extrémité de laquelle lui est solidarisée la structure valvulaire. Selon une autre caractéristique additionnelle de la valvule prothétique selon l'invention, la structure valvulaire présente des raidisseurs préformés pour rappeler élastiquement ladite structure valvulaire vers son état fermé. Selon un premier mode de réalisation de la valvule prothétique selon l'invention, les raidisseurs de la structure valvulaire sont tels qu'ils tendent à se rapprocher les uns des autres jusqu'à venir au contact les
uns des autres.
Selon un second mode de réalisation de la valvule prothétique selon l'invention, la structure valvulaire comporte deux raidisseurs opposés diamétralement
qui tendent à s'éloigner l'un de l'autre.
Selon une caractéristique additionrelle du second mode de réalisation de la valvule protrn6tique selon l'invention, la structure valvulaire comporte des raidisseurs qui tendent à sô rapprocher les uns des autres
jusqu'au contact.
Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la
description qui suit et qui se rapporte au dessin annexé,
lequel en représente plusieurs modes de réalisation non
limitatifs.
Dans le dessin annexé: - les figures la, lb et 1c représentent chacune une vue en perspective d'un premier mode de réalisation d'une valvule prothétique selon l'invention, lors de trois
étapes de son fonctionnement.
- les figures 2a, 2b et 2c représentent des vues schématiques en coupe des figures respectivement la, lb et
lc, selon un plan longitudinal médian.
- la figure 3 représente une vue en perspective schématique d'une partie de la même valvule prothétique
selon une première variante.
- la figure 4 représente une vue en perspective schématique d'une partie de la même valvule prothétique
selon une seconde variante.
- les figures 5a, 5b et 5c représentent des vues en perspective d'un second mode de réalisation d'une valvule prothétique selon l'invention, lors de trois étapes de son fonctionnement. - les figures 6a, 6b et 6c représentent des vues partielles de dessus respectivement des figures 5a, 5b et
5c.
- les figures 7a et 7b représentent des vues en perspective dans des représentations différentes d'une valvule prothétique selon l'invention lors de son implantation. - les figures 8a et 8b représentent des vues en perspective dans des représentations différentes de la même
valvule prothétique lors de sa mise en place.
Si on se réfère aux figures la, lb, lc, 2a, 2b et 2c on peut voir un premier mode de réalisation d'une valvule prothétique 1 selon l'invention, qui comprend une
structure rigide expansible 2 et une structure valvulaire 3.
La structure expansible 2, comme cela est visible uniquement sur les figures la, lb et lc, comporte un treillis 20 de fils métalliques 21, conformé en un tube apte à être déformé de manière irréversible dans le sens radial,
tout en conservant sa forme tubulaire.
On notera que sur ces figures la structure expansible 2 est dans sa configuration déployée, laquelle
correspond à une rigidité optimale.
Les fils métalliques 21 sont entrecroisés selon une disposition permettant de passer d'un état comprimé à un état développé. Dans le cas d'une valvule prothétique 1 destinée à remplacer les valves sigmoïdes, le diamètre de la structure expansible 2 à l'état replié est de l'ordre de 4 à 8 mm, tandis qu'à l'état développé il est de 20 à 23 mm
selon la taille du patient.
La paroi interne de la structure expansible 2 est recouverte d'une enveloppe tubulaire 4 qui lui est solidarisée et qui réalise l'étanchéité. L'enveloppe 4 est apte à suivre le mouvement d'expansion de la structure expansible 2, elle pourra à cet effet être par exemple plissée lorsque la structure expansible est dans son état replié. La structure valvulaire 3 consiste en un tissu conformé en un tronc de cône hyperbolique, c'est-à-dire que sa paroi est concave, dont la base 31, qui correspond au diamètre le plus grand du tronc de cône est solidaire d'un bord extrême de l'enveloppe 4, tandis que l'extrémité 32, correspondant au diamètre le plus petit, s'étend vers l'extérieur. Le tissu 30 peut être réalisé en matière plastique tel que du polyuréthanne traité pour éviter une calcification, ou du péricarde également traité contre la
calcification, ou tout autre matériau équivalent.
On notera que lorsque la structure valvulaire 3 est réalisée en polyuréthanne, elle peut avantageusement ne
faire qu'une seule pièce avec l'enveloppe 4.
Le tissu 30 est armé de raidisseurs 33 qui s'étendent de la base 31 jusqu'à l'extrémité 32. Ils sont disposés, comme cela est représenté, selon des génératrices courbes du tronc de cône, mais ils peuvent toutefois être
disposés hélicoïdalement.
Les raidisseurs 33 peuvent consister en des bourrelets de matière dont est faite la structure valvulaire, ou en des fils de métal tel que de l'acier, et sont de préférence au nombre de 3 ou 4 dans cette configuration. Les raidisseurs 33 sont formés d'origine pour contraindre la structure valvulaire 3 à la fermeture comme cela est représenté sur les figures lc et 2c, c'est-à-dire qu'ils sont incurvés en direction de l'axe principal de la valvule prothétique 1, et tendent à se rapprocher les uns des autres. Leur rigidité est toutefois limitée pour permettre l'ouverture de la structure valvulaire 3 par un flux comme cela est représenté sur les figures la et 2a, les
figures lb et 2b représentant une étape intermédiaire.
Les raidisseurs 33 peuvent être solidaires de la structure expansible 2 et venir en appui extérieur contre la structure valvulaire 3 à laquelle ils sont solidarisés par
suture lorsque celle-ci est réalisée au moyen de péricarde.
Dans le cas d'une structure valvulaire réalisée en polyuréthanne, les raidisseurs 33 peuvent avantageusement y
être noyés.
Dans le cas d'une valvule prothétique 1 destinée à remplacer les valves sigmoïdes, la structure valvulaire 3 est disposée du côté de l'aorte, en sorte que lors de la systole ventriculaire la forte pression du flux sanguin systolique généré par la contraction ventriculaire fait s'ouvrir la structure valvulaire 3, tandis que lors de la diastole les raidisseurs 33 et l'inversion de la pression
sanguine la ferment.
La forme tronco-hyperbolique de la structure valvulaire 3 permet que l'obturation soit réalisée non pas uniquement au niveau son extrémité 32, mais, du fait que les extrémités de raidisseurs 33 viennent en contact tangent, sur une portion représentant sensiblement un tiers de sa hauteur, en sorte d'obtenir une parfaite étanchéité évitant
ainsi une régurgitation.
Si on se réfère à la figure 3, on peut voir que dans une variante, la structure expansible 3 peut, lors de son expansion, prendre une forme concave de manière à faire apparaître dans sa région médiane un rétrécissement 34 apte
à favoriser son centrage sur le lieu de son implantation.
En référence à la figure 4, on peut voir que dans une autre variante, le centrage de la structure expansible 3 est facilité par la présence un étranglement
médian 35.
Si on se réfère maintenant aux figures 5a, 5b, c, 6a, 6b et 6c, on peut voir un second mode de réalisation d'une valvule prothétique 1' selon l'invention. Cette valvule prothétique 1' comprend également une structure expansible 2 couverte intérieurement d'une enveloppe 4 et une structure valvulaire 3 de forme tronconique. La structure valvulaire 3 est équipée de six raidisseurs régulièrement espacés, deux raidisseurs 36,
opposés diamétralement, et quatre raidisseurs 37.
Comme on peut le voir sur les figures 6a, 6b et 6 c, les raidisseurs 36 sont conformés pour s'éloigner l'un de l'autre, tandis que les raidisseurs 37 sont conformés
pour se rapprocher les uns des autres.
Du point de vue réalisation, par exemple, les raidisseurs 36 sont disposés à l'intérieur de la structure valvulaire 3 tandis que les raidisseurs 37 sont placés à l'extérieur. Sur les figures 5a et 6a, qui représentent une systole ventriculaire, la structure valvulaire 3 s'ouvre sous la poussée F du flux sanguin. Par contre sur les figures 5c et 6c, qui représentent une diastole, après une étape intermédiaire représentée sur les figures 5b et 6b, la structure valvulaire 3 se ferme comme deux feuillets accolés l'un à l'autre, en ce sens que les raidisseurs 36 tirent le tissu 30 vers l'extérieur tandis que les raidisseurs 37 se rejoignent deux à deux, ce qui entraine, en association avec la pression sanguine aortique P, l'aplatissement de la
structure valvulaire 3.
La structure valvulaire 3 aplatie, tendue par les raidisseurs 36 et accolée à elle-même sur une grande surface, ne présente pas de plis susceptibles de créer des fuites engendrant une régurgitation comme dans le premier
mode de réalisation.
On notera que selon une variante, non représentée, la structure valvulaire 3 peut ne comporter que les deux raidisseurs 36. Dans ce cas, lors d'une diastole, les raidisseurs 36 en s'éloignant l'un de l'autre tendent la g structure valvulaire 3, et la pression sanguine aortique P
qui complète l'aplatissement et la fermeture.
Si on se réfère maintenant aux figures 7a et 7b, on peut voir une valvule prothétique 1 en cours d'implantation, sachant que l'implantation d'une valvule
prothétique 1' est réalisée de la même manière.
La structure expansible 2 est repliée, et est montée sur un ensemble d'éléments destiné à réaliser son expansion. Cet ensemble comprend une sonde 5 sur laquelle est enfilée une tige 50 comportant non loin de son extrémité un ballonnet 51 qui prend place à l'intérieur de la structure expansible 2, contre l'enveloppe 4, et de manière qu'il ne déborde pas au-dessus de la ligne de jonction de la
structure valvulaire 3 à l'enveloppe 4.
La tige 50 comporte deux conduits, non visibles, dans l'un desquels passe la sonde 5, tandis que l'autre débouche dans le ballonnet 51 pour permettre le gonflement
de celui-ci.
Si on se réfère maintenant aux figures 8a et 8b, on peut voir que le gonflement du ballonnet 51 permet
l'expansion de la structure expansible 2.
Le ballonnet 51 n'est en contact qu'avec l'enveloppe 4 en sorte que la structure valvulaire 3 ne
risque pas d'être endommagée par le gonflement.
D'autre part, la position du ballonnet 51 en dessous de la ligne de jonction de la structure valvulaire 3 avec l'enveloppe 4 évite un risque d'endommagement au niveau de cette jonction et d'évasement de la structure valvulaire 3. Outre que, comme vue précédemment, la structure valvulaire 3 ne peut pas être endommagée lors de sa mise en place, la valvule prothétique 1, selon l'invention présente de nombreux avantages par rapport aux valvules prothétiques existantes et notamment celle décrite dans le document EP 0
850 607.
Ainsi, la prolongation de l'enveloppe 4 par la structure valvulaire 3 et la solidarisation de cette dernière à la structure expansible 2 conduit à une fabrication plus aisée et à une plus grande fiabilité dans
le temps.
D'autre part, le passage de l'état ouvert à l'état fermé, et inversement, est plus facile, du fait d'une plus grande liberté de débattement de la structure
valvulaire 3 sur l'enveloppe 4.
La valvule prothétique selon l'invention est prévue pour être implantée par cathétérisme comme cela a été vu précédemment, elle peut toutefois être implantée chirurgicalement à coeur ouvert en présentant des avantages
par rapport aux valvules prothétique usuelles.
Ainsi, la structure expansible métallique 2 de valvule prothétique selon l'invention peut, après sa mise en place dans l'orifice valvulaire, éventuellement au moyen d'un ballon de dilatation, être suturée sur le pourtour de
l'anneau valvulaire.
Avantageusement, la valvule prothétique selon l'invention ne comporte pas le gros anneau téfloné des valvules prothétiques usuelles, qui est destiné à permettre la suture, en sorte que le calibre d'ouverture est bien supérieur. A titre d'exemple, une valvule prothétique selon l'invention présente une ouverture comprise entre 3,1 et 4,1 cmz2, tandis que celle d'une valvule prothétique usuelle est
de l'ordre de 2 cm2.
1 1
Claims (10)
1) Valvule prothétique implantable par cathétérisme, ou chirurgicalement, comportant une structure rigide expansible (2) et une structure valvulaire (3) solidarisée à ladite structure expansible (2) et apte à être déformée pour passer alternativement d'un état ouvert à un état fermé, caractérisée en ce que ladite structure valvulaire (3) est solidarisée à une extrémité de ladite
structure expansible (2), et s'étend extérieurement à celle-
ci. 2) Valvule prothétique selon la revendication 1, caractérisée en ce que la structure expansible (2) comporte un treillis (20) de fils métalliques (21) présentant une
forme tubulaire.
3) Valvule prothétique selon la revendication 2, caractérisée en ce que la structure expansible (2) dans sa configuration déployée présente dans sa région médiane un
diamètre inférieur à ceux des bords extrêmes.
4) Valvule prothétique selon la revendication 3, caractérisée en ce que la paroi de la structure expansible (2) est concave de manière que ladite structure expansible
présente un rétrécissement (34) dans sa région médiane.
) Valvule prothétique selon la revendication 3, caractérisée en ce que la structure expansible (2) présente
un étranglement (35) dans sa région médiane.
6) Valvule prothétique selon l'une quelconque
des revendications précédentes, caractérisée en ce que la
structure valvulaire (3) consiste en une pièce de forme troncohyperbolique, réalisée en un tissu (30) souple et résistant, et est solidarisée à la structure expansible (2)
par son extrémité (31) de plus grand diamètre.
7) Valvule prothétique selon l'une quelconque
des revendications précédentes, caractérisée en ce que la
structure expansible (2) comporte une enveloppe (4) qui la recouvre intérieurement, faite d'un tissu souple et résistant, à une extrémité de laquelle lui est solidarisée
la structure valvulaire (3).
8) Valvule prothétique selon l'une quelconque
des revendications précédentes, caractérisée en ce que la
structure valvulaire (3) présente des raidisseurs (33; 36, 37) préformés pour rappeler élastiquement ladite structure
valvulaire (3) vers son état fermé.
9) Valvule prothétique selon la revendication 8, caractérisée en ce que les raidisseurs (33) de la structure valvulaire (3) sont tels qu'ils tendent à se rapprocher les
uns des autres.
) Valvule prothétique selon la revendication 8, caractérisée en ce que la structure valvulaire (3) comporte deux raidisseurs (36) opposés diamétralement qui
tendent à s'éloigner l'un de l'autre.
11) Valvule prothétique selon la revendication , caractérisée en ce que la structure valvulaire (3) des raidisseurs (37) qui tendent à se rapprocher les uns des
autres.
12) Valvule prothétique selon l'une quelconque
des revendications de 8 à 11, caractérisée en ce que les
raidisseurs (33; 36, 37) consistent en des bourrelets de matière dont est faite la structure valvulaire (3), ou en
des fils de métal.
13) Valvule prothétique selon la revendication 12, caractérisée en ce que les raidisseurs (33; 36, 37) sont des fils métalliques solidaires de la structure expansible (2).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9900416A FR2788217A1 (fr) | 1999-01-12 | 1999-01-12 | Valvule prothetique implantable par catheterisme, ou chirurgicalement |
AU30529/00A AU3052900A (en) | 1999-01-12 | 2000-01-12 | Prosthetic heart valve implantable by catheter insertion or surgically |
PCT/FR2000/000051 WO2000041652A1 (fr) | 1999-01-12 | 2000-01-12 | Valvule prothetique implantable par catheterisme, ou chirurgicalement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9900416A FR2788217A1 (fr) | 1999-01-12 | 1999-01-12 | Valvule prothetique implantable par catheterisme, ou chirurgicalement |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2788217A1 true FR2788217A1 (fr) | 2000-07-13 |
Family
ID=9540913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9900416A Pending FR2788217A1 (fr) | 1999-01-12 | 1999-01-12 | Valvule prothetique implantable par catheterisme, ou chirurgicalement |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3052900A (fr) |
FR (1) | FR2788217A1 (fr) |
WO (1) | WO2000041652A1 (fr) |
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Also Published As
Publication number | Publication date |
---|---|
WO2000041652A1 (fr) | 2000-07-20 |
AU3052900A (en) | 2000-08-01 |
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