Medical device delivery system

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01) A61F 2/24 (2006.01) A61F 2/01 (2006.01)

Patent

CA 2466270

A delivery system for implanting a medical device such as a venous valve into the vasculature of a patient. The delivery system includes a delivery catheter having a device-containing portion adjacent to the distal end thereof, and an inner member extending through the catheter and beyond the distal end thereof, to an atraumatic distal tip portion forward of the catheter distal end. The inner member extends through the medical device in the device-containing region, includes a proximal portion with sufficiently large diameter to prevent longitudinal movement of the device as the catheter is retracted during deployment, and centers the device upon release from the distal catheter end during deployment. The inner member is preferably radiolucent underlying the device for contrast with radiopaque markers of the device. The inner member preferably includes a flat portion extending from the device-containing portion to the proximal end to form a passageway or lumen with the delivery catheter to transmit hydrating fluid to a device such as a valve containing lyophilized tissue requiring hydration immediately prior to patient implantation.

L'invention concerne un système d'administration (10) destiné à implanter un dispositif médical (30), notamment une valvule veineuse dans le système vasculaire d'un patient. Le système d'administration comprend un cathéter d'administration (11) comportant une portion comprenant le dispositif (15), adjacente à l'extrémité distale (14) du cathéter, et un élément interne (16) orienté le long du cathéter, au delà de son extrémité distale, jusqu'à une portion d'embout distale non traumatisante (17) en avant de l'extrémité distale du cathéter. L'élément interne traverse le dispositif médical, dans la région contenant le dispositif, et comprend une portion proximale (18) de diamètre suffisamment grand afin d'empêcher un déplacement longitudinal du dispositif lorsque le cathéter est rétracté durant le déploiement, et permet de centrer le dispositif, lors de sa libération de l'extrémité distale du cathéter, durant le déploiement. L'élément interne, sous-jacent au dispositif, est de préférence radiotransparent afin de contraster avec les marqueurs radio-opaques (43) du dispositif. L'élément interne comprend, de préférence, une portion plate (35) orientée de la portion contenant le dispositif à l'extrémité proximale (22) afin de former un passage ou une lumière (21) avec le cathéter d'administration dans le but de transmettre un fluide hydratant à un dispositif, notamment une valvule contenant du tissu lyophilisé nécessitant une hydratation immédiatement avant implantation dans le patient.

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