Prosthesis anchoring and deploying device

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01)

Patent

CA 2583521

A system for intraluminally delivering and deploying stents and other prostheses includes an outer catheter (18), an inner catheter (28) movable axially relative to the outer catheter, and an anchoring device (40) mounted to a distal end region (30) of the inner catheter. The anchoring device (40) includes one or more control features (58) that interact with a linking structure (46) proximally disposed on the prosthesis (24), preferably including one or more loops. The control features (58) and loops interact by surface engagement to anchor the prosthesis (24) relative to the inner catheter in a nonfrictional manner, thus to maintain lower axial prosthesis deployment and retraction forces. In one version of the anchor (40), the control features extend (58) radially outward from a sleeve. In another version, the control features are formed in respective recesses which also receive the loops or other linking structure.

L'invention concerne un système pour amener et déployer, au travers d~une lumière, des stents et autres prothèses. Le dispositif ci-décrit comporte un cathéter externe (18), un cathéter interne (28) pouvant être déplacé axialement par rapport au cathéter externe, et un dispositif d~ancrage (40) installé à une zone d~extrémité distale (30) du cathéter interne. Le dispositif d~ancrage (40) comporte un ou plusieurs dispositif(s) de commande (58) qui interagissent avec une structure de raccordement (46) disposée proximalement sur la prothèse (24), comportant, de préférence, une ou plusieurs boucle(s). Les dispositifs de commande (58) et les boucles interagissent par prise avec la surface pour ancrer la prothèse (24) par rapport au cathéter interne sans appliquer de friction, ce qui maintient les forces axiales inférieures de déploiement et de rétraction de prothèses. Dans une version de l~ancrage (40), les dispositifs de commande (58) se prolongent radialement vers l~extérieur à partir d~une gaine. Dans une autre version, les dispositifs de commande sont formés dans des renfoncements respectifs qui reçoivent aussi les boucles ou autre structure de liaison.

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