Self-expansible stent with radiopaque markers and method of making such a stent
First Claim
1. A method of fastening a radiopaque marker to an A-vertex of a radially self-expanding stent, in which the marker is advanced into a fastening position and then welded to the A-vertex creating a welding zone between the A-vertex and the marker, wherein:
- the relative movement between the marker and the A-vertex lacks a component orthogonal to the stent'"'"'s longitudinal axis, andan end surface of the marker and end surfaces of B-vertexes that circumferentially flank the marker and the A-vertex all lie in a plane orthogonal to the longitudinal axis.
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Accused Products
Abstract
Pushing a self-expanding stent from one of its ends, during release of the stent at a stenting site in a bodily lumen, by proximal withdrawal of a surrounding sheath, can impose unacceptably high stresses on parts of the strut network of the stent. For location of stents in a bodily lumen, it is customary to equip the end annulus of a stent with radiopaque markers. The present invention involves arranging the markers so that they share with non-marker portions of the end annulus the stresses imposed in the stent by the end pushing, whereby the high stresses are shared more equally by all the struts of the stent in the end annulus.
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Citations
14 Claims
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1. A method of fastening a radiopaque marker to an A-vertex of a radially self-expanding stent, in which the marker is advanced into a fastening position and then welded to the A-vertex creating a welding zone between the A-vertex and the marker, wherein:
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the relative movement between the marker and the A-vertex lacks a component orthogonal to the stent'"'"'s longitudinal axis, and an end surface of the marker and end surfaces of B-vertexes that circumferentially flank the marker and the A-vertex all lie in a plane orthogonal to the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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providing a radiopaque marker; providing a self-expanding stent comprising an A-vertex positioned between two circumferentially arranged, B-vertexes; and advancing the marker into a fastening position abutting the A-vertex, until a marker end and ends of the two B-vertexes all lie in a plane orthogonal to a longitudinal axis of the stent, wherein advancing is with longitudinal movement and without radial movement. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification