Introducer sheath

A - Human Necessities – 61 – L

Patent

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Details

A61L 29/06 (2006.01) A61L 29/08 (2006.01) A61L 29/12 (2006.01) A61M 25/00 (2006.01) A61M 25/06 (2006.01)

Patent

CA 2599638

An introducer sheath has an inner fluorocarbon liner, a reinforcing member disposed radially outwardly from the liner, and a polymeric intermediate layer positioned longitudinally over the reinforcing member and inner liner. A heat shrink layer formed of a block copolymer having cross-linked and non-cross- linked functional groups comprises an outer layer of the sheath. During formation of the introducer sheath, the intermediate layer is melted and compressed in the heat shrink layer in a manner such that the inner surface of the intermediate layer bonds to the outer surface of the inner liner through spacings of the reinforcing member, and the outer surface of the intermediate layer bonds with non-cross-linked active functional groups of the heat shrink layer.

Une gaine d'introduction possède un manchon de fluorocarbure, un élément de renfort placé radicalement vers l'extérieur de ce manchon et une couche intermédiaire polymère placée longitudinalement sur l'élément de renfort et à l'intérieur du manchon. Une couche thermorétractable formée d'un copolymère bloc possédant des groupes fonctionnels réticulés et non réticulés constitue une couche extérieure de la gaine. Pendant la fabrication de cette gaine d'introduction, la couche intermédiaire est fondue et comprimée dans la couche thermorétractable de façon que la surface intérieure de cette couche intermédiaire se lie à la surface extérieure du manchon intérieur via les séparations de l'élément de renfort et, que la surface extérieure de la couche intermédiaire se lie aux groupes fonctionnels actifs non réticulés de la couche thermorétractable.

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