Delivery system and sheath for endoluminal prosthesis
First Claim
1. A delivery sheath for delivering stents or other endoluminal prostheses, the sheath having a distal end with a radially inner sheath layer and a radially outer sheath layer both extending to the distal end of the sheath, wherein the radially inner layer comprises a material having a low coefficient of friction and the radially outer layer comprises an elastic material;
- and wherein the radially 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 overlying radially outer layer.
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Accused Products
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.
69 Citations
19 Claims
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1. A delivery sheath for delivering stents or other endoluminal prostheses, the sheath having a distal end with a radially inner sheath layer and a radially outer sheath layer both extending to the distal end of the sheath, wherein the radially inner layer comprises a material having a low coefficient of friction and the radially outer layer comprises an elastic material;
- and wherein the radially 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 overlying radially outer layer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A delivery system, comprising a delivery sheath having a distal portion at a distal end;
- an endoluminal prosthesis located within the delivery sheath in the distal portion so that the distal portion of the delivery sheath extends circumferentially around the prosthesis, the delivery sheath tapering distally of the prosthesis to a reduced diameter at the distal end of the sheath so providing an atraumatic surface distally of the prosthesis, the distal portion of the delivery sheath comprising a radially inner sheath layer and a radially outer sheath layer both extending to the distal end of the sheath, wherein the radially inner layer comprises a material having a low coefficient of friction and the radially outer layer comprises an elastic material; and
wherein the radially 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 overlying radially outer layer as the sheath is retracted proximally with respect to the prosthesis. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
- an endoluminal prosthesis located within the delivery sheath in the distal portion so that the distal portion of the delivery sheath extends circumferentially around the prosthesis, the delivery sheath tapering distally of the prosthesis to a reduced diameter at the distal end of the sheath so providing an atraumatic surface distally of the prosthesis, the distal portion of the delivery sheath comprising a radially inner sheath layer and a radially outer sheath layer both extending to the distal end of the sheath, wherein the radially inner layer comprises a material having a low coefficient of friction and the radially outer layer comprises an elastic material; and
Specification