Importance

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Abstract

A stent delivery sheath has a distal portion extending circumferentially around a stent, the delivery sheath tapering distally of the stent to a reduced diameter at the distal end of the sheath so providing an atraumatic or dilating surface distally of the stent. The distal portion of the delivery sheath comprises a low friction inner layer and an elastic outer layer both extending to the distal end of the sheath. The inner layer has at least one separation line extending longitudinally of the sheath to the distal end to define at least two leaf edges in the radially inner layer which are configured to move circumferentially with respect to each other to accommodate elastic radial expansion of the outer layer as the sheath is retracted proximally with respect to the stent.

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First Claim