ES2239849T3 - Dispositivo para la implantacion de endoprotesis de accion reversible. - Google Patents
Dispositivo para la implantacion de endoprotesis de accion reversible.Info
- Publication number
- ES2239849T3 ES2239849T3 ES99939829T ES99939829T ES2239849T3 ES 2239849 T3 ES2239849 T3 ES 2239849T3 ES 99939829 T ES99939829 T ES 99939829T ES 99939829 T ES99939829 T ES 99939829T ES 2239849 T3 ES2239849 T3 ES 2239849T3
- Authority
- ES
- Spain
- Prior art keywords
- stent
- inner tube
- outer sheath
- chamber
- balloon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002441 reversible effect Effects 0.000 title claims abstract description 7
- 238000002513 implantation Methods 0.000 claims abstract description 30
- 230000014759 maintenance of location Effects 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000010339 dilation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 230000036262 stenosis Effects 0.000 description 2
- 208000037804 stenosis Diseases 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000472 traumatic effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000002399 angioplasty Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
- A61F2002/9665—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod with additional retaining means
Landscapes
- 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)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Un dispositivo (1) para la implantación de endoprótesis de acción reversible, para endoprótesis (7) auto- expandibles, que se extiende entre un extremo distal (4) y un extremo proximal de manipulación, que comprende un tubo interior (8) que se extiende axialmente, rodeado por una funda exterior (16), comprendiendo el tubo interior (8), cerca de su extremo distal, una cámara (6) que encierra, antes de su introducción, una endoprótesis (7) auto- expandible en estado de radialmente contraída, estando cerrada esta cámara (6) por la funda exterior (16), pudiendo moverse el tubo interior (8) axialmente con relación a la funda exterior (16), comprendiendo además el dispositivo de implantación medios (20) de retención activables a distancia para mantener o liberar selectivamente la endoprótesis en una relación axial dada con relación al tubo interior y para liberarla, caracterizado porque los medios (20) de retención activables a distancia comprenden, cerca de la parte proximal de la cámara (6), unglobo (20) inflable fijado al tubo interior (8), estando destinado este globo (20) a ser conectado a medios de aplicación de presión situados en el extremo proximal del dispositivo (1) de implantación, en el que, en uso, cuando la funda exterior (16) ha sido movida axialmente con respecto al tubo interior (8), la cámara está parcialmente abierta y el extremo distal de la endoprótesis se ha expandido, el globo inflado proporciona un firme agarre sobre el extremo proximal de la endoprótesis (7) fijado en la parte no abierta de la cámara (6), permitiendo que el tubo interior (8) sea hecho deslizar hacia atrás con relación a la funda exterior (16) hasta la posición cerrada de la cámara (6).
Description
Dispositivo para la implantación de endoprótesis
de acción reversible.
El invento se refiere a dispositivos para la
implantación de endoprótesis luminales en vasos de animales,
incluyendo vasos del cuerpo humano.
En particular, se refiere a un dispositivo de
esta clase para desplegar y retraer un stent, en particular, un
stent auto-expandible.
Los avances conseguidos en la angioplastia han
tenido como resultado ahora que se presente una atención particular
al posicionamiento preciso de una endoprótesis en vasos que han de
curarse. Esto es particularmente cierto para los vasos pequeños.
Se han realizado ya varios intentos enfocados a
conseguir la posibilidad de controlar la posición de un stent
auto-expandible en un dispositivo de implantación,
durante la operación de implantación, antes de que aquél se expanda
radialmente en toda su longitud.
El documento US 5.026.377 describe un dispositivo
para la implantación de un stent, para un stent
auto-expandible tal como el descrito en el documento
US-A-4.655.771. El extremo proximal
del stent a liberar se sujeta a un empujador central del dispositivo
mediante un adhesivo o merced a un ensanchamiento local de este
empujador.
Los documentos US 5.628.755 y US 5.246,421
describen catéteres de dilatación para la implantación de stents
plásticamente deformables (stents de globo). El stent se coloca en
el catéter, alrededor del globo de dilatación. En el documento US
5.628.755 un manguito permite adaptar la longitud del globo a la
longitud del stent.
El documento WO 96/13228 describe un dispositivo
para implantación de un stent provisto de un "manguito de
recaptura" blando - dotado generalmente de gargantas cruzadas -
situado en el empujador central del dispositivo con el fin de
impedir el desplazamiento axial de un stent
auto-expandible con relación al empujador antes de
que se haya permitido la expansión de una fracción dada del
stent.
Sin embargo, en la práctica, estos dispositivos
no ofrecen resultados totalmente fiables.
Justo antes de desplegarse en el vaso, el stent
se sitúa dentro de una cámara hacia el extremo distal del
dispositivo de implantación. Una vez que el stent se ha desplegado
parcialmente y, por tanto, se le ha permitido expandirse, se coloca,
por sí mismo, contra la pared interna del vaso. Se ha comprobado que
resulta difícil devolver a la fuerza al stent al interior de la
cámara. De hecho, en lugar de volver a entrar en la cámara, el stent
se rasga, con frecuencia, separándose del extremo del dispositivo de
implantación, por lo que ya no puede ser desplazado sin ser
destruido o retirado mediante cirugía.
Además, los medios de recaptura de los
dispositivos de acuerdo con el estado de la técnica, incrementan
adicionalmente la dimensión radial del dispositivo de
implantación.
Existe, por tanto, la urgente necesidad de contar
con un dispositivo para la implantación de endoprótesis de acción
reversible, eficaz y que ahorre espacio.
Conseguir un posicionamiento preciso del stent
exige un control preciso de su posición mediante el empujador, sean
cuales sean las solicitaciones a que se vea sometido el stent.
Con este fin, el invento proporciona un
dispositivo para la implantación de endoprótesis de acción
reversible para endoprótesis auto-expandibles, que
se extiende entre un extremo distal y un extremo proximal de
manipulación, que comprende un tubo interior que se extiende
axialmente, rodeado por una funda exterior, comprendiendo el tubo
interior, cerca de su extremo distal, una cámara que encierra, antes
de su introducción, una endoprótesis auto-expandible
en estado de radialmente contraída, estando cerrada esta cámara por
la funda exterior, pudiendo moverse axialmente el tubo interior con
relación a la funda exterior. El dispositivo de implantación del
invento comprende, además, medios para la implantación a distancia
destinados a mantener o liberar, selectivamente, la endoprótesis en
una relación axial dada con respecto al tubo interior y a liberar la
misma, y se caracteriza porque comprende, cerca de la parte proximal
de la cámara, un globo inflable fijado al tubo interior, estando
destinado este globo a ser conectado a medios de aplicación de
presión dispuestos en el extremo proximal del dispositivo de
implantación, en el que, en uso, cuando la funda exterior ha sido
desplazada axialmente con relación al tubo interior, la cámara está
parcialmente abierta y el extremo distal de la endoprótesis se ha
expandido, el globo inflable proporciona un agarre firme sobre el
extremo proximal de la endoprótesis fijado en la parte no abierta de
la cámara, permitiendo que el tubo interior sea hecho deslizar hacia
atrás con relación a la funda exterior, hasta la posición cerrada de
la cámara. El globo, que actúa como medio de retención activable a
distancia, hace posible entrar en vasos de pequeño diámetro,
obteniéndose un intenso efecto de retención a voluntad, cuando el
extremo proximal del dispositivo de implantación que lleva el stent
ha sido llevado hasta la zona que ha de curarse. Dado que el globo
puede ser activado a distancia, la fuerza de retención puede
aplicarse cuando sea necesario y en la posición en que se requiera
dicha fuerza, haciendo posible de este modo cambiar la posición del
stent sin dañar las paredes del vaso.
Merced al globo, se proporcionan unos medios de
retención, activables a distancia, sencillos y no voluminosos, pero
fiables, Además, la intensidad de la fuerza de retención puede
controlarse con precisión y regularse por medio de la presión del
globo.
El globo inflable está situado cerca de la parte
proximal de la cámara.
Ventajosamente, el globo puede inflarse hasta
adoptar un diámetro correspondiente al diámetro de un vaso del
cuerpo.
Preferiblemente, el dispositivo puede e3ncerrar
una endoprótesis hecha con una malla de aleación con memoria de
forma.
La funda exterior está reforzada,
preferiblemente, con una malla de múltiples hilos, ventajosamente de
alambre.
Otras ventajas del invento resultarán evidentes
al hacer referencia a la descripción que sigue de diversas
realizaciones, dadas a modo de ejemplos no limitativos, y tomada en
conjunto con los dibujos anejos, en los que:
la Fig. 1 es una vista diagramática de una
sección transversal de la parte distal de una realización de un
dispositivo de acuerdo con el invento.
La Fig. 2 es una vista diagramática del
dispositivo de la Fig. 1 en una etapa temprana de la operación de
despliegue.
La Fig. 3 es una vista diagramática del
dispositivo de las Figs. 1, 2 en una etapa ulterior de la operación
de despliegue.
La Fig. 4 es una vista diagramático de un posible
uso de un dispositivo de acuerdo con la Fig. 1, tras la liberación
completa del stent.
La Fig. 5 es una vista diagramática de otra
realización del dispositivo en una fase correspondiente a la Fig.
3.
La Fig. 6 es una vista diagramática de todavía
otra realización en la misma fase del despliegue.
En la Fig. 1, un dispositivo 1 de implantación de
acuerdo con el invento ha sido introducido, siguiendo un
procedimiento conocido, hasta una lesión 3 que ha de curarse de un
vaso 2 del cuerpo, en presente caso una estenosis en una arteria
2.
El extremo distal 4 del dispositivo comprende una
cámara 6 en la que se ha insertado, en estado de radialmente
contraída, una endoprótesis expandible - representada en este caso
como un stent 7 auto-expandible.
La cámara 6 se extiende alrededor de un tubo
interior 8, ente una punta 10 no traumática y un empujador 12 de
stent. Una luz axial 14 permite que todo el dispositivo de
implantación 1 sea impulsado a lo largo de un alambre de guía (no
mostrado).
La cámara 6 está cerrada por una funda exterior
16 que es axialmente movible a voluntad con relación al tubo
interior 8.
La posición óptima del stent 7 tras su liberación
y expansión puede comprobarse cuidadosamente, antes de iniciar el
proceso de liberación, gracias a la presencia de marcadores 18
radio-transparentes empotrados en la, por otra parte
radio-opaca, funda exterior 16.
El dispositivo de implantación 1 de acuerdo con
el invento comprende, asimismo, un dispositivo de retención
controlado a distancia que, en la presente realización, comprende un
micro-globo 20 inflable conectado a medios de
aplicación de presión (no representados) situado en el extremo
proximal del dispositivo de implantación 1.
Durante las operaciones de introducción, el
micro-globo 20 se mantiene en estado desinflado,
careciendo esto virtualmente de influencia sobre el diámetro del
dispositivo 1, que puede introducirse en vasos 2 muy finos.
Habiéndose determinado la posición del
dispositivo, supuestamente óptima, para el despliegue del stent, se
infla ligeramente el micro-globo 20, haciendo que el
extremo proximal del stent 7 quede bloqueado firmemente en posición
con respecto al tubo interior 8.
Puede moverse ahora hacia atrás la funda exterior
16, como se representa en la Fig. 2, descubriendo el extremo distal
del stent 7, que se expande radialmente debido a su propia
elasticidad o debido al cambio de temperatura que sufre en caso de
que el stent esté hecho de un material que sufra una transición de
fase a la temperatura del cuerpo.
Esta etapa es crítica en la mayoría de los
dispositivos de implantación de la técnica conocida, que se supone
que tienen la posibilidad de forzar al stent de vuelta a su
cámara.
Desde luego, tan pronto como se despliega el
stent, queda anclado a la pared interna del vaso y, así, ejerce
sobre la funda exterior del dispositivo una resistencia suficiente
para hacer que su extremo proximal se rasgue separándose de la parte
proximal, todavía cerrada, de la cámara 6.
Este efecto se ve fuertemente acentuado cuando el
stent es un stent auto-expandible, en particular
cuando está fabricado de un material que sufre una transición de
fase (por ejemplo, Nitinol) a la temperatura del cuerpo.
Con los dispositivos de implantación clásicos, el
operador no tiene la posibilidad de volver atrás cuando aprecia que,
por alguna razón, el stent no se encuentra situado perfectamente en
el lugar correcto.
Por el contrario, los medios de retención 20,
activados a distancia, que forman parte del dispositivo 1 de acuerdo
con el invento, proporcionan un agarre muy firme sobre el stent 7,
permitiendo que el tubo interior 8 sea hecho deslizar hacia atrás
con relación a la funda exterior 16, hasta la posición inicial
(cerrada) de la cámara 6, aún cuando el stent 7 se hay desplegado,
previamente, hasta en un 80% de su longitud.
Gracias a los medios de retención 20, ha sido
posible volver a situar el stent 7 en una posición más adecuada,
bien después de un desplazamiento axial o bien después de una
rotación, según el caso.
Cuando el stent 7 ha sido colocado en su posición
correcta, puede desinflarse el dispositivo de retención 20 y tirarse
completamente de la funda exterior 16 hacia atrás, como se
representa en la Fig, 3.
El dispositivo 1 del invento puede retirarse
entonces a través del stent 7 expandido o, como puede verse a partir
de la Fig. 4, puede permitir otra operación ventajosa.
Si la pantalla de control revela que la operación
no ha resultado absolutamente satisfactoria (por ejemplo, como se
muestra en la Fig. 3, cuando la estenosis 3 impide que el stent 7 se
expanda completamente), sigue siendo posible, sin retirar el
dispositivo 1, utilizar adicionalmente el
micro-globo 20 de retención, actuando ahora como
globo clásico de dilatación, moviendo todo el dispositivo 1 hacia
delante e inflando de nuevo el micro-globo 20, esta
vez a una presión suficiente para que adopte el diámetro del vaso 2
que ha de curarse. El uso del presente dispositivo 1 permite, así,
ganar un tiempo precioso del empleado para la operación y causar
menos dolor al paciente.
La presión requerida para inflar el
micro-globo 20 es ejercida por un fluido
transportado por una segunda luz 22 que se extiende a lo largo de
la luz axial 14 del tubo interior 8.
Este tubo interior 8 es, preferiblemente, rígido,
con el fin de evitar que se doble durante las operaciones de
introducción. La PEEK (poli(éter cetona)) o el POM (poliacetol) son,
entre otros, materiales particularmente adecuados, rígidos y no
deformables, pero también pueden ser deformables con el fin de
adaptarse a la forma del stent 7. Éste puede estar fabricado de PE o
PET (polietileno o poli(tereftalato de etileno)).
El diámetro externo y la longitud del globo 20
deben elegirse cuidadosamente con el fin de evitar un inflado
excesivo en su extremo distal, que podría dificultar que el stent 7
fuese llevado de vuelta a la cámara 6.
La funda exterior 16 debe ofrecer, naturalmente,
una resistencia excelente a la compresión con el fin de que el stent
7 no la distienda. La funda exterior 16 está reforzada, de
preferencia, por una malla 24 de múltiples hilos, como se muestra en
las Figs. 5 y 6.
También en este caso el POM o la PEEK u otros
materiales orgánicos son los más adecuados.
El fluido de accionamiento puede ser alimentado
mediante una jeringa de inflado conocida, conectada a la segunda luz
22 a través de un adaptador en Y conocido (no mostrado).
Las Figs. 5 y 6 ofrecen dos posibles
realizaciones de la segunda luz 22 y del globo 20. Como puede verse
en la Fig. 5, el globo 20 está fijado, en su extremo distal al tubo
interior 8 y, en su extremo proximal, del lado periférico del
empujador 12, extendiéndose la segunda luz entre el tubo interior 8
y el empujador 12.
La Fig. 6 presenta una realización en la que el
tubo interior 8 encierra dos luces separadas. Una primera luz 14
para el paso del alambre de guía 26 continúa a través de la punta 10
no traumática. Una segunda luz 22 comprende al menos una salida
lateral 28 en comunicación con el volumen interno del
micro-globo 20. Esta segunda luz 22 está bloqueada
en su extremo distal, hacia la punta 10 no traumática.
De manera breve, el invento puede describirse en
la forma siguiente:
Un dispositivo (1) para la implantación de una
endoprótesis de acción reversible, para implantar una endoprótesis
auto-expandible, que comprende un tubo interior (8)
que se extiende axialmente, rodeado por una funda exterior (16) que
comprende un globo (20) de retención activable a distancia para
mantener o liberar la endoprótesis (7) en relación axial fija con
respecto al tubo interior (8) de forma que, hasta que finalice el
procedimiento de implantación, la endoprótesis (7) pueda ser
retirada y vuelta a situar en una posición más adecuada.
Claims (4)
1. Un dispositivo (1) para la implantación de
endoprótesis de acción reversible, para endoprótesis (7)
auto-expandibles, que se extiende entre un extremo
distal (4) y un extremo proximal de manipulación, que comprende un
tubo interior (8) que se extiende axialmente, rodeado por una funda
exterior (16), comprendiendo el tubo interior (8), cerca de su
extremo distal, una cámara (6) que encierra, antes de su
introducción, una endoprótesis (7) auto-expandible
en estado de radialmente contraída, estando cerrada esta cámara (6)
por la funda exterior (16), pudiendo moverse el tubo interior (8)
axialmente con relación a la funda exterior (16), comprendiendo
además el dispositivo de implantación medios (20) de retención
activables a distancia para mantener o liberar selectivamente la
endoprótesis en una relación axial dada con relación al tubo
interior y para liberarla, caracterizado porque los medios
(20) de retención activables a distancia comprenden, cerca de la
parte proximal de la cámara (6), un globo (20) inflable fijado al
tubo interior (8), estando destinado este globo (20) a ser conectado
a medios de aplicación de presión situados en el extremo proximal
del dispositivo (1) de implantación, en el que, en uso, cuando la
funda exterior (16) ha sido movida axialmente con respecto al tubo
interior (8), la cámara está parcialmente abierta y el extremo
distal de la endoprótesis se ha expandido, el globo inflado
proporciona un firme agarre sobre el extremo proximal de la
endoprótesis (7) fijado en la parte no abierta de la cámara (6),
permitiendo que el tubo interior (8) sea hecho deslizar hacia atrás
con relación a la funda exterior (16) hasta la posición cerrada de
la cámara (6).
2. Un dispositivo de implantación de acuerdo con
la reivindicación 1, caracterizado porque el globo (20) puede
ser inflado, además, hasta adoptar un diámetro correspondiente al
diámetro del stent expandido.
3. Un dispositivo (1) de implantación de acuerdo
con las reivindicaciones 1 a 2, caracterizado porque la funda
exterior (16) está reforzada con una malla de múltiples hilos.
4. Un dispositivo de implantación de acuerdo con
la reivindicación 3, caracterizado porque la malla está hecha
de alambres metálicos.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98200834 | 1998-03-17 | ||
| EP98200834A EP0943300A1 (en) | 1998-03-17 | 1998-03-17 | Reversible action endoprosthesis delivery device. |
| US86535 | 1998-05-29 | ||
| US09/086,535 US6042589A (en) | 1998-03-17 | 1998-05-29 | Reversible-action endoprosthesis delivery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2239849T3 true ES2239849T3 (es) | 2005-10-01 |
Family
ID=8233476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES99939829T Expired - Lifetime ES2239849T3 (es) | 1998-03-17 | 1999-03-16 | Dispositivo para la implantacion de endoprotesis de accion reversible. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6042589A (es) |
| EP (2) | EP0943300A1 (es) |
| AU (1) | AU3268499A (es) |
| DE (1) | DE69924100T2 (es) |
| ES (1) | ES2239849T3 (es) |
| WO (1) | WO1999047075A1 (es) |
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Also Published As
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|---|---|
| DE69924100D1 (de) | 2005-04-14 |
| EP1067886A1 (en) | 2001-01-17 |
| WO1999047075A1 (en) | 1999-09-23 |
| AU3268499A (en) | 1999-10-11 |
| EP1067886B1 (en) | 2005-03-09 |
| EP0943300A1 (en) | 1999-09-22 |
| DE69924100T2 (de) | 2006-04-13 |
| US6042589A (en) | 2000-03-28 |
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