Delivery system and method for deployment of foreshortening...

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01)

Patent

CA 2478474

A delivery system (30) comprising an endoluminal device (10), an outer sheath (28) that radially surrounds the endoluminal device (10), a pusher (27) positioned at one end (11) of the endoluminal device (10) , and a linkage (32) between the pusher (27) and the outer sheath (28) that coordinates movement of the outer sheath (28) in a first direction with simultaneous movement of the pusher (27) in a second direction opposite the first direction. This delivery system (30) is particularly useful for endoluminal devices that foreshorten, and may comprise the outer sheath (28) moving a first distance (d1) and the pusher (27) moving s second (d2) where d2/d1 is approximately equal to the foreshortening ratio. The delivery system (30) of this invention enables a foreshortening device, such as a vena cava filter, or stent, graft, or combination thereof, to be deployed with its end (12) in a precise deployment location (29) without foreshortening causing the end (12) to move from the deployment location (29) as the stent (10) expands.

L'invention concerne un système de distribution comprenant un dispositif endoluminal, une gaine extérieure entourant ce dispositif, un poussoir positionné à une extrémité du dispositif endoluminal, et un lien entre le poussoir et la gaine extérieure permettant de coordonner le déplacement de la gaine extérieure dans une première direction et le déplacement simultané du poussoir dans une seconde direction opposée à la première. Ce système de distribution est particulièrement utile concernant des dispositifs endoluminaux qui raccourcissent, dans lequel la gaine extérieure se déplace d'une première distance (<i>d</i>¿<i>1</i>?) et le poussoir d'une seconde distance (<i>d</i>¿<i>2</i>?) avec <i>d</i>¿<i>2</i>?/<i>d </i>¿<i>1</i>? approximativement égal au rapport de raccourcissement. Le système de distribution de l'invention permet à un dispositif raccourcissant, tel qu'un filtre de veine cave, ou un extenseur, un dispositif de rétention, un greffon, ou une de leurs combinaisons, d'être déployé avec son extrémité dans un emplacement de déploiement précis sans un raccourcissement qui provoquerait le déplacement de l'extrémité de l'emplacement de déploiement au fur et à mesure de l'expansion du dispositif de rétention.

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