Lining for bodily lumen
First Claim
1. A self-expanding stent graft for percutaneous transluminal delivery, characterised by a length of 200 mm or more.
1 Assignment
0 Petitions
Accused Products
Abstract
A covered self-expanding stent (114, 130, 132) with a length of 200 mm or more can be restrained against axial movement with a pusher (40) within the lumen of the stent that carries a spiral of wire (48) that provides protrusions that are accommodated within a luminal covering layer (24) radially inside the stent body. The protrusions distribute the stress over the full length of the stent. The pusher can be removed from the stent lumen by “unscrewing” the spiral relative to the covering layer (24). When the stent expands, the pusher can be withdrawn proximally, out of the stent lumen, without any need for rotatory movement. The covered stent can utilise a variety of stenting rings (110-118) along its length that manifest different mechanical properties so that the implant can exhibit mechanical properties that vary over its length, to suit the specific body and stenting site to which it is to be introduced.
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Citations
19 Claims
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1. A self-expanding stent graft for percutaneous transluminal delivery, characterised by
a length of 200 mm or more.
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9. A self-expanding stent graft for percutaneous transluminal delivery, mounted on a system for delivering the stent graft percutaneously and transluminally to a stenting site within the human (or animal) body, characterized in that:
the stent graft has a length of 200 mm or more. - View Dependent Claims (10)
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11. A method of loading a self-expanding stent into a delivery sheath, in which the stent in a radially confined delivery configuration is advanced axially into the sheath for delivery to a stenting site in which the sheath is withdrawn to release the stent for radial expansion at the site characterized by the steps of
i) providing said stent as a covered stent having a stent matrix with surfaces defining luminal and abluminal envelopes spaced apart by a stent wall thickness, a covering material bonded to the matrix lying radially inside the luminal envelope, and a length of 200 mm or more, ii) providing a stent pusher within the lumen of the stent, the stent pusher having radially outwardly extending protrusions distributed along the length of the stent lumen iii) compressing the stent radially inwardly until the protrusions deform the covering material, yet remain radially inside the luminal envelope, and iv) advancing the compressed stent into the sheath by imposing an endwise force on the stent pusher so that the covering material transfers the pushing force from the protrusions of the stent pusher to the stent matrix.
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13. A self-expanding stent within a percutaneous transluminal delivery catheter that includes a sheath that withdraws proximally to release the stent at a stenting site, and a pusher within the sheath that retains the stent at the site during withdrawal of the sheath characterised in that
i) the pusher extends along the lumen of the stent and has radially outwardly extending protrusions distributed along the length of the stent lumen ii) the stent is a covered stent having a length of 200 mm or more and a matrix with surfaces defining luminal and abluminal envelopes spaced apart by a stent wall thickness, a covering material bonded to the matrix lying radially inside the luminal envelope; - and
iii) the protrusions deform the covering material yet remain radially inside the luminal envelope. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification