Anti-migratory stent coating
AssigneeBoston Scientific Scimed, Inc.
InventorsDane T. Seddon, Sean P. Fleury, Mark D. Wood, Gary S. Kappel
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Abstract
The invention is directed to an anti-migratory stent comprising a tubular structure having an exterior surface and a plurality of protrusions provided on the exterior surface. The plurality of protrusions includes a first set of protrusions and a second set of protrusions. Each of the first and second set of protrusions includes a base and an apex. The apex of each of the first set of protrusions is offset from the base of the first set of protrusions in a direction opposite a direction of offset of the apex of each of the second set of protrusions from the base of the second set of protrusions.
Claims20
An anti-migratory stent comprising:
- a tubular structure having an exterior surface;
- and
- a plurality of protrusions provided on the exterior surface and comprising a first set of protrusions and a second set of protrusions, each of the first and second set of protrusions having a base and an apex, the apex of each of the first set of protrusions being offset from the base of the first set of protrusions in a direction opposite a direction of offset of the apex of each of the second set of protrusions from the base of the second set of protrusions.
An anti-migratory stent comprising:
- a tubular support structure having an exterior surface;
- and
- a coating disposed about the exterior surface, the coating having a plurality of protrusions, the plurality of protrusions comprising a plurality of proximal-oriented protrusions and a plurality of distal-oriented protrusions,
- each proximal-oriented protrusion having a base and an apex, the apex of each proximal-oriented protrusion being positioned a predetermined radial distance from the base of the proximal-oriented protrusion, the apex of each proximal-oriented protrusion being offset from the base of the proximal-oriented protrusion in a proximal direction,
- each distal-oriented protrusion having a base and an apex, the apex of each distal-oriented protrusion being positioned a predetermined radial distance from the base of the distal-oriented protrusion, the apex of each distal-oriented protrusion being offset from the base of the distal-oriented protrusion in a distal direction.
A method to increase an anti-migration ability of a stent, the method comprising the steps of:
- providing a generally tubular body having an internal surface defining a lumen therethrough, an external surface coaxially surrounding the internal surface, and a plurality of connecting channels that each define an open passageway between the internal surface and the external surface;
- providing an insert having an outer surface comprising a plurality of protrusions;
- placing the insert within the lumen of the generally tubular body;
- orienting the insert so that the protrusions of the outer surface of the insert pass through the connecting channels of the generally tubular body and protrude beyond the external surface of the generally tubular body.
Dependencies are inferred from the claim text.