Back to results
US 10,117,761 B2Granted
Stent with anti-migration features
AssigneeBoston Scientific Scimed, Inc.
InventorsSeamus F. O'Shaughnessy, Gary J. Leanna, Jason Weiner, Dane T. Seddon, Sean P. Fleury
Life of this patent
Estimating the term…
Abstract
An endoprosthesis includes an expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis. The expandable tubular framework includes a plurality of interconnected struts. The interconnected struts include a radially outward face which includes a plurality of anti-migration grooves defining anti-migration teeth formed therebetween. The anti-migration teeth are configured to engage tissue to resist migration of the endoprosthesis within a body lumen.
Claims20
An endoprosthesis comprising:
- an expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis, the lumen defining an inner surface, the expandable tubular framework including a plurality of interconnected struts and openings extending between the inner surface and a radially outward surface of the interconnected struts, wherein an entirety of the expandable tubular framework is formed from a monolithic tubular member subsequent removal of material from the tubular member to form the openings;
- wherein the radially outward surface of the interconnected struts includes a plurality of anti-migration grooves defining anti-migration teeth formed therebetween, wherein a portion of the interconnected struts is devoid of anti-migration teeth, the portion devoid of anti-migration teeth having a first thickness measured between the inner surface and the radially outward surface, wherein a point defining a radially outward-most extent of the anti-migration teeth is located on the radially outward surface of the interconnected struts such that a second thickness measured between the inner surface and the point defining the radially outward-most extent of the anti-migration teeth is the same as the first thickness;
- wherein the anti-migration teeth are configured to engage tissue to resist migration of the endoprosthesis within a body lumen.
An endoprosthesis comprising:
- an expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis, the lumen defining an inner surface, the expandable tubular framework including a plurality of interconnected struts and openings extending between the inner surface and a radially outward surface of the interconnected struts, wherein an entirety of the expandable tubular framework is formed from a monolithic tubular member subsequent removal of material from the tubular member;
- wherein the radially outward surface includes a plurality of anti-migration grooves cut into the radially outward surface of the interconnected struts to define anti-migration teeth formed therebetween;
- wherein the anti-migration teeth include a first flank and a second flank converging toward the first flank, wherein the second flank of a first anti-migration tooth meets the first flank of an adjacent second anti-migration tooth at a point defining a lower end of the groove between the first and second teeth;
- wherein a first portion of the anti-migration teeth adjacent the first end of the expandable tubular framework are angled in a first direction and a second portion of the anti-migration teeth adjacent the second end of the expandable tubular framework are angled in a second direction opposite the first direction;
- wherein the anti-migration teeth are configured to engage tissue to resist migration of the endoprosthesis within a body lumen.
2 more elements
A method of forming an endoprosthesis, comprising:
- forming an expandable tubular framework from a monolithic tubular member, the expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis, the lumen defining an inner surface, the expandable tubular framework including a plurality of interconnected struts and openings extending between the inner surface and a radially outward surface of the interconnected struts, wherein an entirety of the expandable tubular framework is formed from the monolithic tubular member subsequent removal of material from the tubular member;
- and
- forming a plurality of anti-migration grooves in the radially outward facing surface, thereby defining a plurality of anti-migration teeth between adjacent anti-migration grooves, wherein a portion of the interconnected struts is devoid of anti-migration teeth, the portion devoid of anti-migration teeth having a first thickness measured between the inner surface and the radially outward facing surface, wherein a point defining a radially outward-most extent of the anti-migration teeth is located on the radially outward surface of the interconnected struts such that a second thickness measured between the inner surface and the point defining the radially outward-most extent of the anti-migration teeth is the same as the first thickness.
Dependencies are inferred from the claim text.