US 12,433,774 B2
Stent, mandrel, and method for forming a stent with anti-migration features
Martyn G. Folan, County Galway (IE)
Assigned to BOSTON SCIENTIFIC SCIMED, INC., Maple Grove, MN (US)
Filed by BOSTON SCIENTIFIC SCIMED, INC., Maple Grove, MN (US)
Filed on Jun. 1, 2023, as Appl. No. 18/327,567.
Application 18/327,567 is a continuation of application No. 17/165,691, filed on Feb. 2, 2021, granted, now 11,707,368.
Claims priority of provisional application 62/969,498, filed on Feb. 3, 2020.
Prior Publication US 2023/0301808 A1, Sep. 28, 2023
Int. Cl. A61F 2/88 (2006.01); A61F 2/95 (2013.01)
CPC A61F 2/885 (2013.01) [A61F 2/9526 (2020.05); A61F 2002/9511 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.