ES2335651T3 - Conjunto que permite la colocacion de una valvula protesica en un conducto corporal. - Google Patents
Conjunto que permite la colocacion de una valvula protesica en un conducto corporal. Download PDFInfo
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- ES2335651T3 ES2335651T3 ES02764940T ES02764940T ES2335651T3 ES 2335651 T3 ES2335651 T3 ES 2335651T3 ES 02764940 T ES02764940 T ES 02764940T ES 02764940 T ES02764940 T ES 02764940T ES 2335651 T3 ES2335651 T3 ES 2335651T3
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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
- A61F2/2403—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 pivoting rigid closure members
-
- 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
- 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
-
- 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
- A61F2220/005—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives
-
- 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
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0067—Three-dimensional shapes conical
-
- 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
- A61F2250/006—Additional features; Implant or prostheses properties not otherwise provided for modular
Landscapes
- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial 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
Conjunto que permite la colocación de una válvula protésica (4) en un conducto corporal, en especial una válvula cardiaca y, de manera particular, una válvula aórtica, que comprende: - la válvula protésica (4) que se debe implantar; - una estructura (2) expandióle radialmente, llamada "stent ", que comprende al menos una zona (10, 11, 14) destinada a ser expandida para permitir que este stent (2), en estado expandido, se apoye contra la pared del conducto corporal (100) que se debe tratar, en donde este apoyo permite inmovilizar este stent (2) con respecto a esta pared; y - medios (25, 31; 50, 51) para el montaje de la válvula (4) con respecto al stent (2), que permiten unir la válvula (4) al stent (2) de tal manera que la colocación del stent (2) permite el montaje de la válvula (4) en el interior del conducto corporal (100), medios de expansión tales como un catéter de globo, previstos para producir la expansión del stent (2) en el sitio de implantación previsto; en donde el conjunto (1) está caracterizado porque: - la estructura (2) es única, en donde la parte de esta estructura que comprende la misma incluye al menos una zona (10,11, 14) destinada a ser expandida, forma una pieza unitaria con la parte de esta estructura que recibe la válvula o está destinada a recibir la válvula, y - la válvula (4) y el stent (2) están conformados de tal manera que la válvula (4) está situada, en el momento en el que se efectúa la expansión del stent (2) por fuera de la o las zonas (10,11, 14) del stent (2) sometidas a dichos medios de expansión.
Description
Conjunto que permite la colocación de una
válvula protésica en un conduto corporal.
La presente invención se refiere a un conjunto
que permite la colocación de una válvula protésica en un conducto
corporal, especialmente una válvula cardiaca y, en particular, una
válvula aórtica.
Los documentos WO 91/17720, WO 98/29057 y EP 1
057 460 describen sendos dispositivos de este tipo, que
comprenden:
- -
- la válvula protésica que se debe implantar;
- -
- una estructura radialmente expansible, denominada "stent", capaz de apoyarse, en su estado expandido, contra la pared del conducto corporal, en donde este apoyo permite inmovilizar dicho stent con respecto a dicha pared; y
- -
- medios de fijación de la válvula al stent.
\vskip1.000000\baselineskip
La colocación del stent permite, de esta forma,
el montaje de la válvula dentro del conducto corporal, eliminando la
necesidad de un abordaje desde el exterior y, por lo tanto, una
intervención quirúrgica directa.
En cualquier caso, esta técnica tiene como
principales inconvenientes los de inducir el riesgo de daños de la
válvula a través del globo utilizado para efectuar la expansión del
stent, y de limitar la fuerza de expansión que se puede imprimir al
stent. Esta limitación repercute sobre el anclaje del stent, lo que
hace posible un desplazamiento de dicho kit. Igualmente, esta
limitación repercute sobre la estanqueidad del stent a nivel del
anillo valvular, que se ve especialmente afectada cuando las zonas
calcificadas confieren al anillo valvular una forma irregular y/o
una cierta rigidez.
Un inconveniente adicional de la técnica
anterior es el de unir directamente las comisuras de las válvulas al
stent. El resultado es que una expansión del stent y, por lo tanto,
de la válvula, diferente de la prevista puede implicar una
coaptación incorrecta de las válvulas y, por consiguiente, su
funcionamiento defectuoso. Por lo tanto, el stent debe estar
sometido a una expansión predeterminada que impida, o dificulte, la
adaptación de dicho stent a la variabilidad anatómica.
La técnica anterior tiene también los
inconvenientes, en caso de implantación de una válvula aórtica, de
requerir un posicionamiento muy exacto del stent en el interior de
la aorta, con el fin de que la válvula esté dispuesta de manera
comparable al anillo valvular original, y el de inducir el riesgo de
obstrucción de los orificios de las arterias coronarias que
desembocan a nivel de los ostia coronarios.
La presente invención aspira a superar estos
diversos inconvenientes.
El kit al que se refiere comprende, de manera en
sí conocida:
- -
- la válvula protésica que se debe implantar;
- -
- una estructura expansible radialmente, denominada "stent", que comprende al menos una zona destinada a expandirse para permitir que este stent, en estado expandido, se apoye contra la pared del conducto corporal de referencia, lo que permite inmovilizar el stent en relación con dicha pared; y
- -
- medios de montaje de la válvula con respecto al stent, que permite fijar la válvula al stent de tal forma que la colocación del stent permite el montaje de la válvula en el conducto corporal,
estando previsto el uso de medios de expansión
tales como un catéter de globo para provocar la expansión del stent
a nivel del punto de implantación.
\vskip1.000000\baselineskip
Según la invención, la válvula y el stent están
conformados de tal manera que la válvula está situada, en el momento
en que se lleva a cabo la expansión del stent fuera de la o de las
zonas del stent sometidas a los citados medios de expansión.
La invención consiste, de esta forma, en separar
la válvula de la o las zonas que se deben expandir, de modo que la
expansión del stent se pueda efectuar con una fuerza de expansión
adaptada a un anclaje perfecto del stent a la pared del conducto
corporal que se debe tratar, y sin riesgo de destrucción o
alteración de la válvula.
Según una posibilidad, el stent comprende una
zona de montaje de la válvula, que es diferente de la o las zonas de
expansión del stent, y en donde dichos medios de montaje unen la
válvula a dicha zona de montaje.
La expansión del stent determina, por lo tanto,
el despliegue de la válvula.
Según otra posibilidad, dichos medios de montaje
están conformados de tal manera que la válvula presente un
movimiento axial con respecto al stent, entre una posición de no
implantación, en la que se encuentra fuera de la o las zonas del
stent que se deben expandir, y una posición de implantación, que
puede alcanzar después de la expansión del stent en el interior del
conducto corporal, en la que queda inmovilizada axialmente con
respecto al stent.
Entonces, la válvula puede formar un
sub-conjunto, separado del stent, antes de la
colocación de dicho stent en el conducto corporal, y puede ser
insertada dentro del stent una vez que éste haya sido implantado. De
manera alternativa, la válvula está unida al stent antes de la
colocación del stent dentro del conducto corporal que se debe tratar
y, en consecuencia, se introduce en el conducto con el stent; los
citados medios de montaje comprenden, entonces, medios de
desplazamiento para desplazar la válvula, una vez realizada la
expansión del stent, entre la citada posición de no implantación y
la citada posición de implantación.
Dichos medios de montaje pueden comprender,
entonces, uno o múltiples de las disposiciones siguientes:
- -
- elementos de agarre tales como puntas, ganchos o garras, montadas en la válvula, capaces de ser insertadas en la pared que delimita dicho conducto corporal; estos elementos de agarre pueden estar orientados radialmente con respecto a la válvula, de modo que puedan ser insertados en dicha pared durante el despliegue radial de la válvula, o pueden estar orientados tangencialmente con respecto a la válvula, de manera que puedan ser insertados en dicha pared durante la rotación de la válvula alrededor de su eje, o mediante un movimiento longitudinal en relación con el stent;
- -
- vesículas degradables, rellenas de cola biológica u otro producto adhesivo adecuado, situadas en la cara exterior de la válvula, en donde estas vesículas son capaces de romperse cuando la válvula se dispone en la posición de implantación, especialmente por aplastamiento entre la válvula y el stent;
- -
- al menos, una banda o hilo circular o helicoidal integrado en la pared periférica de la válvula, que presenta memoria de forma que mantiene la válvula adherida al stent en la posición de implantación de esta válvula;
- -
- conductos acondicionados en, o fijados sobre la pared periférica de la válvula, y varillas acondicionadas en el stent, o al contrario, en donde estas varillas pueden insertarse o desplazarse a través de estos conductos durante el paso de la válvula desde su posición de no implantación a su posición de implantación, pudiendo estar previsto el uso de medios tales como ganchos para inmovilizar estos conductos con respecto a dichas varillas en la citada posición de implantación; los hilos pueden estar unidos a los extremos de las citadas varillas y pueden pasar a través de dichos conductos, para facilitar la guía de dichas varillas en estos conductos.
\vskip1.000000\baselineskip
Preferentemente, los medios de montaje de la
válvula con respecto al stent están conformados de modo que
permiten, más allá de un umbral de expansión del stent, una
expansión diferente de la válvula y del stent, de manera que una
variación del grado de expansión del stent carece de incidencia
sobre el grado de expansión de la válvula.
De esta forma, la válvula no está unida
directamente al stent y, de manera especial, no está unida al stent
al nivel de las comisuras de estas válvulas; en la posición
expandida del stent, puede presentar un diámetro predeterminado que
le es propio, independientemente del diámetro del stent. Después de
la implantación, la válvula posee, por lo tanto, una configuración
que permite su correcto funcionamiento sin tener en consideración el
grado de expansión del stent, y dicha expansión del stent puede
estar adaptada a la variabilidad anatómica hallada a nivel de
implantación.
El stent y/o la válvula pueden comprender uno o
múltiples elementos que limitan el diámetro máximo de expansión de
la válvula, sobre todo a nivel de las puntas de las comisuras de
esta válvula. Estos elementos pueden ser hilos longitudinales que
comprende el stent, o un elemento estructural comprendido por la
válvula.
Preferentemente, la válvula presenta una pared
periférica de un diámetro no constante en sentido axial,
especialmente una forma troncocónica cuyo diámetro se reduce en
dirección distal, y la zona del stent destinada a recibir esta pared
periférica de la válvula presenta una forma correspondiente a la de
dicha pared periférica.
Esta pared periférica y esta zona del stent
definen, por lo tanto, una posición determinada de montaje de la
válvula en el stent, y aseguran el mantenimiento en posición
correcta de la válvula dentro del stent.
De manera conveniente, el stent presenta una
porción mediana de diámetro más reducido que las porciones de sus
extremos y, en particular, puede presentar una forma general en dos
troncos de conos inversos o en, "diábolo".
En el caso en que el conjunto según la invención
permite el montaje de una válvula aórtica, el stent presenta así un
distanciamiento de la pared del conducto corporal, especialmente por
una forma cónica o en "diábolo", que permite el paso del
líquido corporal hacia las coronarias a nivel de los ostia
coronarios. La válvula presenta una forma correspondiente a la zona
del stent a la altura en la ésta se debe ensamblar.
De manera conveniente,
- -
- la válvula presenta una pared periférica;
- -
- el stent presenta, en la prolongación, desde el lado distal, de la zona del stent djestinada a recibir la válvula, una porción plegable; esta porción plegabe es móvil entre una posición esperada, en la que ésta se encuehtra dentro de la prolongación de la citada zona del lado distal, y una posición plegada, en la que ésta se sitúa contra la cara interna de la pared periférica de la válvula, y aprisiona esta pared periférica entre ella y la citada zona del stent; y
- -
- se prevé el uso de medios de retención, para mantener esta porción plegáble en dicha posición plegada.
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La pared periférica de la válvula está situada,
por lo tanto, contra el stent, lo que asegura la estanqueidad de la
válvula con respecto al stent.
Según una forma de realización preferida de la
invención, en este caso los citados medios de retención están
formados por un hilo de material rígido, pero que presenta un grado
de flexibilidad elástica, tal como un material metálico, que tiene
una forma ondulada y que se extiende sobre la totalidad de la
circunferencia de la citada porción plegable.
Preferentemente, el stent comprende una vaina de
material biocompatible impermeable que lo recubre al menos
parcialmente.
Esta vaina puede presentar, convenientemente,
aberturas laterales, apropiadas para superponerse con respecto a los
ostia coronarios en el momento de la implantación, y que permiten
así evitar cualquier zona de estancamiento o de ausencia de
circulación de la sangre.
De manera ventajosa, en el caso en que el
conjunto según la invención comprenda dicha porción plegable, esta
porción plegable está constituida por una prolongación de la citada
vaina, que forma un manguito más allá de la citada zona del stent
destinada a recibir la válvula.
De este modo, se alcanza una estanqueidad
perfecta entre la válvula y el stent.
Preferentemente, el stent presenta, fijada sobre
dicha vaina, al menos una cámara periférica inflable, que puede ser
inflada de manera que forma una junta que asegure la estanqueidad
entre el stent y la pared del conducto corporal que se debe
tratar.
Esta estanqueidad está garantizada,
independientemente de la presencia eventual de porciones
calcificadas que confieren a un anillo cardiaco una forma
irregular.
Convenientemente, en este caso, el stent
presenta dos cámaras periféricas inflables, situadas a uno y otro
lado de la porción del stent destinada a apoyarse contra un anillo
valvular cardiaco.
El stent puede presentar una porción cilíndrica,
adecuada para apoyarse contra un anillo valvular cardiaco, y una
porción dístal, unida a esta porción cilíndrica.
Esta porción distal forma, al menos en parte, la
citada zona destinada a recibir la pared periférica de la válvula.
Tiene como ventaja que dicha pared de material biocompatible
impermeable se encuentra, a nivel de esta porción, a una cierta
distancia de la pared del conducto corporal lo cual, en caso de
implantación de una válvula aórtica, permite eliminar el riesgo de
obstruir los ostia coronarios.
De igual modo, el stent puede presentar una
porción proximal troncocónica o acampanada, cuyo diámetro se reduce
progresivamente en dirección distal, apropiada, en caso de implantar
una válvula cardiaca, para apoyarse contra la pared del ventrículo o
de la aurícula correspondiente del corazón.
Esta porción proximal permite definir la
posición del stent y, por lo tanto, posteriormente de la válvula,
con respecto a la zona de implantación. Contribuye, así mismo, a
asegurar una perfecta inmovilización del stent.
Igualmente, el stent puede presentar una porción
suplementaria de apoyo, unida por varillas filiformes a la citada
porción distal o a la citada porción cilíndrica, en donde estas
varillas filiformes tienen longitudinales tales que dicha porción
suplementaria de apoyo se dispone más allá de los ostia
coronarios.
Según una característica adicional, el stent
presenta ganchos móviles entre una posición de retracción, que
ocupan antes de la expansión del stent, y una posición de
despliegue, que adquieren tras el despliegue del stent y en la que
se insertan en una pared que delimita el conducto corporal.
\newpage
Adicionalmente, el stent puede presentar una
porción próxima al anillo valvular, o con respecto a sobre este
anillo valvular, con una fuerza radial elevada, es decir, una fuerza
radial que permite anular las irregularidades anatómicas locales
tales como, por ejemplo, las calcificaciones, con el fin de reforzar
la estanqueidad de la unión entre el stent, la vaina y la pared del
conducto tratado.
Esta porción se puede desplegar con ayuda de un
sistema de expansión de elevada fuerza radial y que puede implicar,
por ejemplo, un globo.
Para su correcta comprensión, la invención se
describirá nuevamente a continuación, haciendo referencia al dibujo
esquemático adjunto que representa, a modo de ejemplos no
limitantes, tres formas de realización posibles del conjunto al que
se refiere.
Figura 1 es una vista lateral de una estructura
expansible, llamada "stent", que lo comprende;
Figura 2 es una vista en sección longitudinal de
una vaina que lo comprende, según una primera forma de
realización;
Figura 3 es una vista en sección longitudinal de
una válvula cardiaca que lo comprende, según esta primera forma de
realización;
Figura 4 es una vista de un detalle del stent, a
escala aumentada;
Figura 5 es una vista de otro detalle del stent,
a escala aumentada, en un estado de no expansión del stent;
Figura 6 es una vista del mismo detalle en
sección a lo largo de la línea VI-VI de la figura
5;
Figura 7 es una vista similar a la de la figura
5, en estado de expansión del stent;
Figura 8 es una vista del mismo detalle, en
sección a lo largo de la línea VIII-VIII de la
figura 7;
Figura 9 es una vista en sección longitudinal de
la vaina y de la válvula que comprende el conjunto según la
invención, de acuerdo con una segunda forma de realización, con un
catéter que permite incluir la válvula dentro de esta vaina;
Figura 10 es una vista en sección longitudinal
de la vaina y de la válvula que comprende el conjunto según la
invención, de acuerdo con una segunda forma de realización, con un
catéter que permite incluir la válvula dentro de esta vaina;
Figura 11 es una vista en perspectiva de la
válvula, según la segunda forma de realización;
Figura 12 es una vista similar a la figura 10,
después de la colocación de la válvula;
Figura 13 es una vista similar a la figura 9,
del conjunto según una tercera forma de realización;
Figura 14 es una vista en perspectiva de la
válvula que se puede insertar en el stent que se muestra en la
figura 13, y
Figuras 15 a 17 son vistas del conjunto según la
tercera forma de realización, en cortes a lo largo de,
respectivamente, las líneas XV-XV,
XVI-XVI y XVII-XVII de la figura
13.
En estas tres formas de realización, los
elementos o partes idénticos o similares, que se encuentran en una u
otra forma de realización, se designan con las mismas referencias
numéricas.
Las figuras 1 a 3 representan, respectivamente,
una estructura expandióle 2, llamada "stent", una vaina 3 y una
válvula protésica 4. Este stent 2, esta vaina 3 y esta válvula 4
componen un conjunto 1, visible en la figura 9, que permite colocar
la válvula 4 en una aorta 100, mostrando el emplazamiento de los
ostia coronarios 101 y el nacimiento de las coronarias 104.
Con respecto a la figura 1, el stent 2 parece
comprender sucesivamente, desde un extremo axial a otro y en sentido
proximal / distal, una porción proximal troncocónica 10, una porción
cilíndrica proximal 11, una porción troncocónica distal 12,
múltiples varillas de unión 13 y una porción cilíndrica distal
14.
El stent es de material metálico, de acero o de
una aleación con memoria de forma. Este material con memoria de
forma puede ser, en especial, el conocido bajo la denominación
"NITINOL".
Las porciones 10 a 12 y 14 están compuestas por
una red de filamentos que forman mallas yuxtapuestas en forma de
rombo o, para la por ión 10, en forma de triángulo. El material que
forma el stent 2 es tal, que las mallas pueden pasar de una
configuración contraída, en la que los filamentos se encuentran
próximos entre sí, lo que les proporciona una forma alargada, a una
configuración expandida, que se puede ver en la figura 1 y en la
figura 7 de manera detallada, en la cual los filamentos están
separados entre sí.
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En la configuración contraída, el conjunto 1
puede ser introducido en la aorta 100 por medio de un catéter, hasta
la zona a nivel de la que se debe implantar la válvula; en la
configuración expandida, el stent 2 se apoya contra la aorta 100, la
pared 102 del ventrículo y el anillo valvular nativo 103 de la forma
que se muestra en la figura 9, de manera que permite la implantación
de la válvula 4 en el lugar y sitio de la válvula original, la cual
ha sido previamente eliminada en caso necesario.
Con respecto a las figuras 1 y 9, la porción 10
tiene un diámetro que se reduce en dirección distal, en donde esta
porción 10 está conformada para apoyarse, en estado expandido,
contra la pared 102 del ventrículo cardiaco.
La porción 11 presenta, en estado expandido, un
diámetro tal que incluso se apoya contra el anillo valvular original
103 y una fuerza radial tal que puede empujar la válvula original (o
sus residuos, después de la exéresis parcial) contra el anillo 103,
de manera que se asegura la estanqueidad en este punto. Esta porción
11 presenta ganchos 15 desplegables, que son especialmente visibles
en las figuras 5 a 8. Estos ganchos 15 permiten el agarre del stent
2 a la aorta 100 a través de la vaina 3.
Tal como muestran las figuras 5 y 6, cada gancho
15 se extiende en sentido longitudinal de una malla, y está unido de
manera rotativa a una zona proximal 16 de empalme de los dos
filamentos proximales 17. Este gancho 15 presenta un extremo libre
15a, curvo y afilado, y una cara 15b, dirigida hacia el interior del
stent 2, de forma redondeada. La zona distal 18 de empalme de otros
dos filamentos 19, situada en el lado opuesto a la base del gancho
15, está en condiciones de llegar a apoyarse, en el transcurso de la
expansión del stent 2, sobre esta cara 15b, así como la que se
desprende de la comparación de las figuras 6 y 8. El apoyo de esta
zona 18 a lo largo de esta cara 15b permite desplegar el gancho 15
en sentido radial hacia el exterior del stent 2 y mantener este
gancho 15 en posición desplegada, en la cual su extremo afilado 15a
se inserta en la pared del anillo 103. Los ganchos pueden tener
forma de anzuelo con el fin de impedir su retracción.
La porción 12 está unida directamente a la
porción 11 y presenta un diámetro que se reduce en dirección distal.
Esta porción 12 está destinada a extenderse al nivel de los ostia
coronarios 101 y recibir la válvula 4. Su forma troncocónica permite
mantener la vaina 3 a distancia de los ostia coronarios 101 y
prevenir, por lo tanto, cualquier riesgo de recubrimiento de los
orificios 104 de las coronarias que desembocan en los mismos.
La porción 12 comprende, además, una serie de
brazos internos 25, visibles más especialmente en la figura 4. Cada
brazo 25 está unido a través de su extremo proximal a una zona de
unión 16 de dos filamentos proximales 17 de una malla, próxima a la
porción 11, y presenta un extremo distal curvo 25a. Estos brazos 25
están inclinados hacia el interior de la porción 12 antes de colocar
la válvula 4 sobre el stent 2, y la figura 4 muestra que, en esta
posición, pueden recibir la válvula 4. Ésta comprende,
efectivamente, una pared periférica 30 en la cual están habilitados
túneles longitudinales 31 adecuados para recibir los brazos 25; a
continuación, estos últimos pueden estar abatidos contra la pared de
la porción 12, ya sea por deformación del material que constituye
los brazos 25 y/o la porción 12, ya sea por memoria de forma en la
que se utiliza un material que posee memoria de forma. Estos brazos
25 permiten así montar la válvula 4 en una porción 12, tal como se
muestra en la figura 9.
Las varillas de unión 13 enlazan el borde distal
de la porción 12 con el borde proximal de la porción 14. Están
dispuestas de forma regular sobre la periferia del stent 2 y, tal
como muestra la figura 9, tienen una longitud suficiente para que la
porción 14 quede situada, tras la implantación, más allá de los
ostia coronarios 101.
La distancia de estas varillas 13 se puede
embridar por medio de un elemento anular que permite limitar el
diámetro superior de la válvula 4 a un tamaño predefinido.
En lo que se refiere a la porción 14, ésta
presenta en el estado expandido, un diámetro ligeramente mayor que
el diámetro interno de la aorta 100, y se apoya contra la pared de
esta última una vez que el stent 2 se sitúa en su posición. Esta
porción 14 puede estar dotada con ganchos 15.
La vaina 3 es de un material biocompatible
impermeable tal como tejido pericárdico, un material conocido bajo
la denominación "DACRON", o un polímero tal como poliuretano, y
presenta porciones 35, 36 y 37. Estas porciones 35, 36 y 37 son
adecuadas para unirse, respectivamente, a las porciones 10, 11 y 12
en su estado expandido. La unión entre la vaina 3 y las porciones 10
a 12 se lleva a cabo, en el momento del ensamblaje del conjunto 1,
por medio de costuras. La unión se puede efectuar, igualmente, por
moldeado de un material polimérico.
Por su lado proximal, la vaina 3 presenta una
solapa 40 que se extiende sobre la cara exterior de la porción 35.
Esta solapa 40 comprende, en la proximidad de su borde libre, una
cámara periférica inflable 41. Esta cámara 41 puede ser inflada de
manera que se forma una junta que asegura la estanqueidad entre la
vaina 3 y la pared del ventrículo 102, sobre el lado proximal del
anillo valvular original 103.
Por su lado distal, la vaina 3 presenta una
solapa 42 que se extiende sobre la cara exterior de la porción 12.
Esta solapa 42 comprende, en la proximidad de su borde libre, una
cámara periférica inflable 43, similar a la cámara 41, y puede ser
inflada de la misma forma que esta última. Esta cámara 43 asegura la
estanqueidad entre la vaina 3 y el anillo 103, por su lado
distal.
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En la figura 2 se ve que la solapa 42 forma un
manguito distal 45, que se extiende más allá del borde distal de la
porción 12, y en la figura 9 se muestra que este manguito 45 es
plegable en el interior de la porción 12. Este manguito 45 incluye
un hilo metálico 46, que se extiende sobre la totalidad de su
circunferencia, en donde este hilo 46 tiene una forma ondulada y es
elásticamente deformable. La deformabilidad de este hilo 46 permite
que el manguito 45 pase desde su posición extendida, que se muestra
en la figura 2, a su posición plegada que se muestra en la figura 9,
en la cual se mantiene por la elasticidad del hilo 46. En esta
posición plegada, el manguito 45 está dispuesto contra la cara
interna de la pared periférica 30 de la válvula 4 y aprisiona esta
pared 30 entre él y la citada porción 12.
La válvula 4 puede estar fabricada con un
material biológico o de un material sintético, o con una combinación
de estos dos tipos de materiales. Su pared periférica 30 presenta
una forma troncocónica adaptada a su ajuste estrecho en la porción
12 cuando los brazos 25 están abatidos contra esta porción 12, lo
que asegura una perfecta inmovilización de la válvula 4 en el stent
2.
El ensamblaje del conjunto 1 se lleva a cabo
colocando la vaina 3 sobre el stent 2 y la válvula 4 sobre los
brazos 25, encontrándose el stent en forma contraída. Seguidamente,
el conjunto 1 se sitúa dentro de un catéter que permite su
introducción en el cuerpo del paciente, en donde este catéter
incluye uno o múltiples globos inflables apropiados para desplegar
las porciones 10, 11 y 14. Posteriormente, este catéter se sitúa en
su posición dentro de la aorta 100. Entonces, se inflan los globos
para desplegar las porciones 10, 11 y 14; el despliegue forzado de
la porción 11 que llevan éstas a cabo permite asegurar el despliegue
de la porción 12 y, por lo tanto, de la válvula 4. A continuación,
se inflan las cámaras 41, 43 para garantizar la estanqueidad de la
vaina 3 con respecto al anillo 103, y el manguito 45 se abate en el
interior de la porción 12 para presionar la pared periférica 30 de
la válvula 4 contra esta porción 12.
Tal como se ha demostrado anteriormente, en el
conjunto 1 la válvula 4 y el stent 2 están conformados de manera tal
que la válvula 4 está situada fuera de la o las zonas 10, 11, 14 que
deben ser expandidas. La expansión del stent 2 se puede llevar a
cabo con una fuerza de expansión adaptada a un perfecto anclaje de
este stent 2 a las paredes 100, 102, 103 que lo reciben, y sin que
exista riesgo alguno para la válvula 4.
Los ganchos 15 permiten asegurar una
inmovilización perfecta del conjunto 1 dentro de la aorta 100, y las
cámaras 41, 43, así como el manguito 45, permiten asegurar la
perfecta estanqueidad del conjunto 1 con respecto a la aorta
100.
En la segunda forma de realización del conjunto
1, la válvula 4 no está previamente montada en el interior del stent
2, sino que se coloca una vez que se ha efectuado la expansión del
stent 2.
Tal como muestra la figura 10, la vaina 3
presenta ahora tubos internos 50 dispuestos de manera tal que se
prolongan hacia el interior del stent 2, una vez que dicha vaina 3
ha sido incorporada al stent 2. Estos tubos 50 pueden estar cosidos
o fijados por cualquier otro medio a la vaina 3, después de
colocarla sobre el stent 2.
En relación con la figura 11, se ve que la pared
periférica 30 de la válvula 4 presenta, en lugar de los túneles 31,
una serie de grapas 51 en relieve. Cada grapa 51 presenta un brazo
interno 52 engranado longitudinalmente en la pared 30, y un brazo
externo 53, rectilíneo, que se extiende a lo largo de la cara
externa de la pared 30. Los brazos 53 terminan en extremos curvos, y
están unidos a hilos 55 fijados que pueden deslizarse en el interior
de los tubos 50.
Tal como demuestra la figura 10, se utiliza un
catéter 80 para introducir la válvula 4 en la vaina 3. La válvula 4
se inserta por deslizamiento en el catéter 80 y los hilos 50,
después de haber atravesado los tubos 50, se unen en el interior del
catéter 80 a partir de la abertura distal del mismo, y atraviesan
este catéter 80 para poder ser accionados desde el exterior. La
colocación y el despliegue de la válvula 4 se lleva a cabo mediante
tracción de los diferentes hilos 55, de forma que se conectan los
diferentes brazos 53 dentro de los tubos 50 correspondientes. Los
brazos internos 52 pueden comprender (véase la figura 12) ganchos
proximales que permiten completar el despliegue de la válvula 4 al
estar fijados a la pared de la vaina 3, por ejemplo, mediante el
inflado de un globo.
En la tercera forma de realización del conjunto
1, que se muestra en la figura 13, el stent 2 forma una caja
mediana, delimitada por un anillo 60 y por hilos longitudinales 61,
dentro de la cual se inserta con precisión la válvula 4. Ésta
muestra, tal como se ve en el figura 14, una pared lateral 30 de
forma tubular, dentro de la que están dispuestas tres aberturas
laterales 65. Estas aberturas 65 se disponen con respecto a los
ostia coronarios 101 permitiendo el flujo natural de sangre, sin
riesgo de que se produzca un estancamiento a nivel de dichos ostia
coronarios 101.
La invención proporciona un conjunto 1 para la
colocación de una válvula 4 dentro de un conducto corporal 100, que
presenta, en relación con conjuntos homólogos de la técnica
anterior, las siguientes ventajas:
- -
- eliminación del riesgo de dañar la válvula 4 con el o los globos utilizados para efectuar la expansión del stent 2;
- -
- posibilidad de aplicar una fuerza de expansión importante sobre el stent 2, que garantice el anclaje del conjunto 1; esta fuerza de expansión importante permite, además, asegurar perfectamente este anclaje gracias a los ganchos 15 desplegables;
- -
- eliminación del riesgo de dilatación de la válvula 4 más allá de un diámetro que permita su funcionamiento óptimo, en especial por la pérdida de coaptación de las válvulas;
- -
- posibilidad de obtener una perfecta estanqueidad del conjunto 1 a nivel del anillo valvular 103 y de la válvula 4;
- -
- eliminación del riesgo de taponamiento de los ostia coronarios 101;
- -
- mantenimiento de un flujo de fluidos corporales alrededor de todo el conjunto 1, una vez que éste ha sido implantado.
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Evidentemente, la invención no está limitada a
la forma de realización descrita anteriormente a modo de ejemplo,
sino que, por el contrario, abarca todas las variantes de
realización que incluye el campo de protección definido por las
reivindicaciones adjuntas.
Claims (21)
1. Conjunto que permite la colocación de una
válvula protésica (4) en un conducto corporal, en especial una
válvula cardiaca y, de manera particular, una válvula aórtica, que
comprende:
- -
- la válvula protésica (4) que se debe implantar;
- -
- una estructura (2) expandióle radialmente, llamada "stent", que comprende al menos una zona (10, 11, 14) destinada a ser expandida para permitir que este stent (2), en estado expandido, se apoye contra la pared del conducto corporal (100) que se debe tratar, en donde este apoyo permite inmovilizar este stent (2) con respecto a esta pared; y
- -
- medios (25, 31; 50, 51) para el montaje de la válvula (4) con respecto al stent (2), que permiten unir la válvula (4) al stent (2) de tal manera que la colocación del stent (2) permite el montaje de la válvula (4) en el interior del conducto corporal (100),
medios de expansión tales como un catéter de
globo, previstos para producir la expansión del stent (2) en el
sitio de implantación previsto;
en donde el conjunto (1) está
caracterizado porque:
- -
- la estructura (2) es única, en donde la parte de esta estructura que comprende la misma incluye al menos una zona (10,11, 14) destinada a ser expandida, forma una pieza unitaria con la parte de esta estructura que recibe la válvula o está destinada a recibir la válvula, y
- -
- la válvula (4) y el stent (2) están conformados de tal manera que la válvula (4) está situada, en el momento en el que se efectúa la expansión del stent (2) por fuera de la o las zonas (10,11, 14) del stent (2) sometidas a dichos medios de expansión.
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2. Conjunto (1) según la reivindicación 1,
caracterizado porque el stent (2) comprende una zona (12) de
montaje de la válvula (4) que es diferente de la o las zonas (10,
11, 14) del stent (2) que se debe expandir, y porque los citados
medios de montaje (25, 31) unen la válvula (4) a esta zona de
montaje (12).
3. Conjunto (1) según la reivindicación 2,
caracterizado porque los citados medios de montaje (25, 31)
comprenden conductos (31) dispuestos dentro, o fijados sobre la
pared periférica (30) de la válvula (4), y brazos (25) dispuestos
sobre el stent (2) o, por el contrario, la pared periférica (30) de
la válvula (4), puede ser engranada y puede deslizarse sobre estos
brazos (25).
4. Conjunto (1) según la reivindicación 1,
caracterizado porque los citados medios de montaje (50, 51)
están conformados de tal manera que la válvula (4) es axialmente
móvil con respecto al stent (2) entre una posición de no
implantación, en la cual se encuentra fuera de la o las zonas (10,
11, 14) del stent (2) que deben ser expandidas, y una posición de
implantación, que puede alcanzar después de la expansión del stent
(2) en el interior del conducto corporal (100), en la cual se halla
inmovilizada axialmente con respecto al stent (2).
5. Conjunto (1) según la reivindicación 4,
caracterizado porque los citados medios de montaje (50, 51)
comprenden una o múltiples de las disposiciones siguientes:
- -
- elementos de agarre tales como puntas, ganchos o garras montados sobre la válvula, adecuados para ser insertados en el pared que delimita el citado conducto corporal; en donde estos elementos de agarre son aptos para estar orientados radialmente con respecto a la válvula, de forma que pueden ser insertados en la citada pared tras el despliegue radial de la válvula, o pueden estar orientados tangencialmente con respecto a la válvula, de forma que pueden ser insertados en dicha pared tras una rotación de la válvula alrededor de su eje o tras un desplazamiento longitudinal con respecto al stent;
- -
- vesículas degradables rellenadas de cola biológica u otro producto adhesivo apropiado, dispuestas sobre la cara externa de la válvula, en donde estas vesículas pueden romperse cuando la válvula adquiere su posición de implantación, especialmente por aplastamiento entre la válvula y el stent;
- -
- al menos una banda o un hilo circular o helicoidal, integrado en la pared periférica de la válvula, que presenta una memoria de forma tal que mantiene la válvula presionada contra el stent en la posición de implantación de esta válvula;
- -
- conductos (50) dispuestos dentro, o fijados sobre la pared periférica de la válvula y varillas dispuestas sobre el stent o, por el contrario, estas varillas (53) que pueden ser insertadas por deslizamiento a través de estos conductos (50) tras el paso de la válvula (4) desde su posición de no implantación a su posición de implantación;
\newpage
- -
- medios tales como ganchos, capaces de inmovilizar dichos conductos (50) con respecto a las citadas varillas (53) en la citada posición de implantación;
- -
- hilos (55) adecuados para estar unidos a los extremos de dichas varillas (53) y que pasan a través de los citados conductos (50) para guiar fácilmente estas varillas (53) por el interior de estos conductos (50).
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6. Conjunto (1) según la reivindicación 1,
caracterizado porque ios medios (60) de montaje de la válvula
(4) con respecto al stent (2) están conformados de forma que
permiten, más allá de un umbral de expansión del stent, una
expansión diferente de la válvula (4) y del stent (2), de manera que
una variación del grado de expansión del stent (2) carece de
incidencia sobre el grado de expansión de la válvula (4).
7. Conjunto (1) según una de las
reivindicaciones 1 a 6, caracterizado porque el stent (2) y/o
la válvula (4) comprenden uno o múltiples elementos (60) que limitan
el diámetro final de la válvula (4), en especial a nivel de las
puntas de las comisuras de las válvulas del mismo.
8. Conjunto (1) según una de las
reivindicaciones 1 a 7, caracterizado porque la válvula (4)
presenta una pared periférica (30) de un diámetro no constante en
sentido axial, en especial una forma troncocónica en la que el
diámetro se reduce en dirección distal, y porque la zona (12) del
stent (2) destinada a recibir la válvula (4) presenta una forma
correspondiente a la de la citada pared periférica (30).
9. Conjunto (1) según una de las
reivindicaciones 1 a 8, caracterizado porque el stent (2)
presenta una porción mediana de diámetro más reducido que el de sus
porciones de los extremos, en especial en dos troncos de cono
inversos o en "diábolo", en donde la válvula presenta una forma
correspondiente a la zona del stent a nivel de la cual debe ser
montada.
10. Conjunto (1) según una de las
reivindicaciones 1 a 9, caracterizado porque:
- -
- la válvula (4) presenta una pared periférica (30);
- -
- el stent (2) presenta, en la prolongación del lado distal de la zona (12) del stent (2) destinado a recibir la válvula (4), una porción plegable (45); esta porción plegable (45) es móvil entre una posición extendida, en la que se encuentra dentro de la prolongación de la citada zona (12) del lado distal, y una posición plegada, en la que se dispone contra la cara interna de la pared periférica (39) de la válvula (4), y atrapa esta pared periférica (30) entre ella y la citada zona (12) del stent (2), y
- -
- medios de retención (46) previstos para mantener esta porción plegable (45) en esta posición plegada.
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11. Conjunto (1) según la reivindicación 10,
caracterizado porque dichos medios de retención están
formados por un hilo (46) de un material rígido pero que presenta un
grado de flexibilidad elástica, tal como un material metálico, que
tiene una forma ondulada y que se extiende sobre toda la
circunferencia de la citada porción plegable (45).
12. Conjunto (1) según una de las
reivindicaciones 1 a 11, caracterizado porque el stent (2)
comprende una vaina (3) de un material biocompatible impermeable,
que lo recubre al menos parcialmente.
13. Conjunto (19 según la reivindicación 12,
para la colocación de una válvula aórtica, caracterizado
porque la vaina presenta aberturas laterales (61), apropiadas para
superponerse con respecto a los ostia coronarios (101) en el momento
de la implantación.
14. Conjunto (1) según la reivindicación 12 o la
reivindicación 13, caracterizado porque en el caso en el que
comprende la citada porción plegable (45), esta porción plegable
(45) está formada por una prolongación de la vaina (3), que forma un
manguito más allá de la citada zona (12) del stent (2) destinada a
recibir la válvula (4).
15. Conjunto (1) según una de las
reivindicaciones 12 a 14, caracterizado porque el stent (2)
presenta, fijada sobre dicha vaina (3), al menos una cámara
periférica inflable (41, 43), que puede ser inflada para formar una
junta que asegure la estanqueidad del stent (2) y la pared del
conducto corporal (100) que se debe tratar.
16. Conjunto (1) según la reivindicación 15,
caracterizado porque el stent (2) presenta dos cámaras
periféricas inflables (41, 43) dispuestas a uno y otro lado de la
porción (11) del stent (2) destinada a apoyarse contra un anillo
valvular cardiaco (103).
17. Conjunto (1) según una de las
reivindicaciones 1 a 16, caracterizado porque el stent (2)
presenta una porción cilíndrica (11) apropiada para apoyarse contra
un anillo valvular cardiaco (103), y una porción distal (12), unida
a esta porción cilíndrica (11).
18. Conjunto (1) según una de las
reivindicaciones 1 a 17, caracterizado porque el stent (2)
presenta una porción proximal (10) troncocónica o acampanada, cuyo
diámetro se reduce en dirección distal, capaz en caso de la
implantación de una válvula (4) cardiaca de apoyarse contra la pared
(102) del ventrículo o de la aurícula correspondiente del
corazón.
19. Conjunto (1) según la reivindicación 17 o la
reivindicación 18, caracterizado porque el stent (2) presenta
una porción de apoyo suplementaria (10), unida por varillas
filiformes (13) a la citada porción distal (12) o a la citada
porción cilíndrica (11), en donde estas varillas filiformes (13)
tienen longitudes tales que esta porción de apoyo suplementaria (10)
se sitúa más allá de los ostia coronarios.
20. Conjunto (1) según una de las
reivindicaciones 1 a 19, caracterizado porque el stent (2)
presenta ganchos (15) móviles entre una posición de retracción que
ocupan antes de la expansión del stent (2), y una posición de
despliegue, que adquieren durante el despliegue del stent (2), y en
la que se insertan en una pared (103, 100) que delimita el conducto
corporal.
21. Conjunto (1) según una de las
reivindicaciones 1 a 20, caracterizado porque el stent (2)
presenta una porción próxima (10) con respecto o sobre el anillo
valvular (103), que posee una fuerza radial elevada.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0108898 | 2001-07-04 | ||
| FR0108898A FR2826863B1 (fr) | 2001-07-04 | 2001-07-04 | Ensemble permettant la mise en place d'une valve prothetique dans un conduit corporel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2335651T3 true ES2335651T3 (es) | 2010-03-31 |
Family
ID=8865140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES02764940T Expired - Lifetime ES2335651T3 (es) | 2001-07-04 | 2002-07-04 | Conjunto que permite la colocacion de una valvula protesica en un conducto corporal. |
Country Status (10)
| Country | Link |
|---|---|
| US (5) | US7252682B2 (es) |
| EP (1) | EP1401359B1 (es) |
| JP (1) | JP4364633B2 (es) |
| AT (1) | ATE440567T1 (es) |
| AU (1) | AU2002329324B2 (es) |
| CA (1) | CA2450935C (es) |
| DE (1) | DE60233493D1 (es) |
| ES (1) | ES2335651T3 (es) |
| FR (1) | FR2826863B1 (es) |
| WO (1) | WO2003003949A2 (es) |
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- 2002-07-04 CA CA2450935A patent/CA2450935C/fr not_active Expired - Fee Related
- 2002-07-04 US US10/482,270 patent/US7252682B2/en not_active Expired - Lifetime
- 2002-07-04 EP EP02764940A patent/EP1401359B1/fr not_active Expired - Lifetime
- 2002-07-04 JP JP2003509965A patent/JP4364633B2/ja not_active Expired - Fee Related
- 2002-07-04 AU AU2002329324A patent/AU2002329324B2/en not_active Ceased
- 2002-07-04 DE DE60233493T patent/DE60233493D1/de not_active Expired - Lifetime
-
2007
- 2007-07-27 US US11/829,682 patent/US7780726B2/en not_active Expired - Fee Related
-
2009
- 2009-10-14 US US12/578,818 patent/US8002826B2/en not_active Expired - Fee Related
-
2011
- 2011-08-18 US US13/212,227 patent/US8628570B2/en not_active Expired - Fee Related
-
2013
- 2013-12-23 US US14/138,229 patent/US9149357B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US7252682B2 (en) | 2007-08-07 |
| WO2003003949A2 (fr) | 2003-01-16 |
| JP2005505320A (ja) | 2005-02-24 |
| US7780726B2 (en) | 2010-08-24 |
| US20100036485A1 (en) | 2010-02-11 |
| DE60233493D1 (de) | 2009-10-08 |
| US20050043790A1 (en) | 2005-02-24 |
| US9149357B2 (en) | 2015-10-06 |
| FR2826863B1 (fr) | 2003-09-26 |
| US8628570B2 (en) | 2014-01-14 |
| CA2450935C (fr) | 2010-09-21 |
| AU2002329324B2 (en) | 2007-07-12 |
| EP1401359B1 (fr) | 2009-08-26 |
| EP1401359A2 (fr) | 2004-03-31 |
| US8002826B2 (en) | 2011-08-23 |
| CA2450935A1 (fr) | 2003-01-16 |
| JP4364633B2 (ja) | 2009-11-18 |
| WO2003003949A3 (fr) | 2004-01-22 |
| FR2826863A1 (fr) | 2003-01-10 |
| ATE440567T1 (de) | 2009-09-15 |
| US20110301692A1 (en) | 2011-12-08 |
| US20140188220A1 (en) | 2014-07-03 |
| US20080215143A1 (en) | 2008-09-04 |
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