Stent, mandrel, and method for forming a stent with anti-migration features
AssigneeBoston Scientific Scimed, Inc.
InventorMartyn G. Folan
Life of this patent
Estimating the term…
Abstract
A medical stent having a first end, a second end, and a central longitudinal axis extending from the first end to the second end, may include a plurality of first filaments each extending in a first helical path around the central longitudinal axis in a first direction and a plurality of second filaments each extending in a second helical path around the central longitudinal axis in a second direction. The plurality of first filaments may be interwoven with the plurality of second filaments. The first helical path of at least one of the plurality of first filaments may include a circumferential offset disposed between the first end and the second end.
Claims20
A medical stent having a tubular body with a first end, a second end, and a central longitudinal axis extending from the first end to the second end, comprising:
- a plurality of first filaments each extending in a first helical direction around the central longitudinal axis of the tubular body;
- and
- a plurality of second filaments each extending in a second helical direction around the central longitudinal axis of the tubular body;
- wherein the plurality of first filaments is interwoven with the plurality of second filaments defining a plurality of spaced apart cross-over points;
- wherein at least some of the plurality of first filaments include a first helical section extending along a first helical path in the first helical direction, a second helical section extending along a second helical path in the first helical direction, and a circumferential offset section disposed directly between the first helical section and the second helical section;
- wherein the at least some of the plurality of first filaments are oriented perpendicular to the central longitudinal axis through the circumferential offset section and the circumferential offset section is formed by a single filament that protrudes radially outward from an outer surface of the tubular body to define an anti-migration loop;
- wherein the first helical path is parallel to but circumferentially offset from the second helical path.
A medical stent having a tubular body with a first end, a second end, and a central longitudinal axis extending from the first end to the second end, comprising:
- a plurality of first filaments each extending in a first helical direction around the central longitudinal axis of the tubular body;
- and
- a plurality of second filaments each extending in a second helical direction around the central longitudinal axis of the tubular body;
- wherein the plurality of first filaments is interwoven with the plurality of second filaments defining a plurality of spaced apart cross-over points;
- wherein at least some of the plurality of first filaments include a first helical section extending along a first helical path in the first helical direction, a second helical section extending along a second helical path in the first helical direction, and a circumferential offset section disposed directly between the first helical section and the second helical section;
- wherein the at least some of the plurality of first filaments are oriented perpendicular to the central longitudinal axis through the circumferential offset section, and the circumferential offset section is formed by a single filament that passes under two adjacent filaments of the plurality of second filaments;
- wherein the first helical path is parallel to but circumferentially offset from the second helical path.
A medical stent having a tubular body with a first end, a second end, and a central longitudinal axis extending from the first end to the second end, comprising:
- a plurality of first filaments each extending in a first helical direction around the central longitudinal axis of the tubular body;
- and
- a plurality of second filaments each extending in a second helical direction around the central longitudinal axis of the tubular body;
- wherein the plurality of first filaments is interwoven with the plurality of second filaments defining a plurality of spaced apart cross-over points;
- wherein a first one of the plurality of first filaments includes a first helical section extending along a first helical path in the first helical direction, a second helical section extending along a second helical path in the first helical direction, and a circumferential offset section disposed directly between the first helical section and the second helical section;
- wherein the first one of the plurality of first filaments is oriented perpendicular to the central longitudinal axis through the circumferential offset section, and the circumferential offset section is formed by a single filament;
- wherein the first helical path is parallel to but circumferentially offset from the second helical path;
- wherein at least some of the plurality of second filaments includes a third helical section extending along a third helical path in the second helical direction, a fourth helical section extending along a fourth helical path in the second helical direction, and a second circumferential offset section disposed directly between the third helical section and the fourth helical section.
Dependencies are inferred from the claim text.