Implantable and lumen-supporting stents and related methods of manufacture and use

An implantable medical stent system, comprising:

• a radially expandable stent comprising a filamental structure of a metal or a metal alloy in a pattern surrounding a bore to form a tubular wall along a length relative to a longitudinal axis;
• the radially expandable stent including a plurality of adjacent segments of the filamental structure in series along the length, wherein a series of cross-overs connect adjacent segments, wherein a cross-over extends between certain crown peak-to-crown peak interfaces between adjacent segments;
• wherein each segment of the plurality of adjacent segments is the same;
• wherein the filamental structure comprises at least one arcuate crown with a crown peak having a radius of curvature located along a reference axis, and first and second arcuate crown shoulders on first and second sides, respectively, of the reference axis;
• wherein the filamental structure also comprises at least one pair of first and second elongated struts extending from the first and second crown shoulders, respectively;
• each of the first and second elongated struts have a first radiused region on an edge surface at a first end and a second radiused region on an opposite edge surface at the first end, wherein the first radiused region is staggered with respect to the second radiused region at the first end along each of the first and second elongated struts;
• and
• wherein the arcuate crown peak comprises at least one of (a) a peak width that is greater than at least one of first and second shoulder widths along the first and second respective arcuate crown shoulders, (b) an inner radius of curvature about a second center that is offset from a first center of an outer radius of curvature, and (c) a radial expansion characteristic with a strain distribution that is lower than along at least one of the first and second crown shoulders;
• and
• wherein the filamental structure also comprises a polymer coating on a surface of the filamental structure.

An implantable medical stent system, comprising:

• a radially expandable stent comprising a filamental structure of a metal or a metal alloy in a pattern surrounding a bore to form a tubular wall along a length relative to a longitudinal axis;
• the radially expandable stent including a plurality of adjacent segments of the filamental structure in series along the length, wherein a series of cross-overs connect adjacent segments, wherein a cross-over extends between certain crown peak-to-crown peak interfaces between adjacent segments;
• wherein each segment of the plurality of adjacent segments is the same;
• wherein the filamental structure comprises at least one arcuate crown with a crown peak having a radius of curvature located along a reference axis, and first and second arcuate crown shoulders on first and second sides, respectively, of the reference axis;
• wherein the filamental structure also comprises at least one pair of first and second elongated struts extending from the first and second crown shoulders, respectively;
• each of the first and second elongated struts have a first radiused region on an edge surface at a first end and a second radiused region on an opposite edge surface at the first end, wherein the first radiused region is staggered with respect to the second radiused region at the first end along each of the first and second elongated struts;
• and
• wherein the arcuate crown peak comprises at least one of (a) a peak width that is greater than at least one of first and second shoulder widths along the first and second respective arcuate crown shoulders, (b) an inner radius of curvature about a second center that is offset from a first center of an outer radius of curvature, and (c) a radial expansion characteristic with a strain distribution that is lower than along at least one of the first and second crown shoulders;
• and
• wherein the filamental structure also comprises a polymer coating comprising a bioactive agent on a surface of the filamental structure.