Medical device, in particular a stent

A medical device comprising:

• a radially self-expandable lattice structure made of a single wire interwoven with itself, the wire having a superelastic jacket material and a core material visible under X-ray, the wire forming meshes of the lattice structure divided into one or more tubular sections,
• wherein the lattice structure includes a plurality of directly neighboring meshes in a circumferential direction of the lattice structure to form a mesh ring,
• wherein in a fully self-expanded state, a core diameter (dcore) of the lattice structure equals a visibility factor (f) multiplied by a ratio of an expansion diameter Dexp over a mesh number (n) of the mesh ring, expressed as dcore=f·(Dexp/n), wherein the visibility factor varies in a range from 0.05 to 0.08,
• wherein a width ratio between the expansion diameter and the mesh number is one of,
• between 0.3 mm and 0.5 mm, corresponding to the expansion diameter being between 2.5 mm and 3.5 mm, or
• between 0.35 mm and 0.7 mm, corresponding to the expansion diameter being between 3.5 mm and 7 mm,
• wherein the expansion diameter is in a range between 2.5 mm and 7 mm,
• wherein the lattice structure includes 6 or 8 meshes per mesh ring in case of the expansion diameter Dexp being between 2.5 mm and 3.5 mm,
• wherein the lattice structure includes 6 or 8 or 10 or 12 meshes per mesh ring in case of the expansion diameter Dexp being between 3.5 mm and 5.0 mm, and
• wherein the lattice structure includes 8 or 10 or 12 or 14 or 16 meshes per mesh ring in case of the expansion diameter Dexp being between 5.0 mm and 7.0 mm.

A medical device comprising:

• a radially self-expandable lattice structure made of a single wire interwoven with itself, the wire having a superelastic jacket material and a core material visible under X-ray, the wire forming meshes of the lattice structure divided into one or more tubular sections,
• wherein the lattice structure includes a plurality of directly neighboring meshes in a circumferential direction of the lattice structure to form a mesh ring,
• wherein in a fully self-expanded state, a core diameter (dcore) of the lattice structure equals a visibility factor (f) multiplied by a ratio of an expansion diameter Dexp over a mesh number (n) of the mesh ring, expressed as dcore=f·(Dexp/n), wherein the visibility factor varies in a range from 0.05 to 0.08,
• wherein a width ratio between the expansion diameter and the mesh number is one of,
• between 0.4 mm and 0.5 mm, corresponding to the expansion diameter being between 2.5 mm and 3.5 mm, or
• between 0.38 mm and 0.7 mm, corresponding to the expansion diameter being between 3.5 mm and 7 mm, and
• wherein a volume of the core material constitutes a percentage proportional to an overall volume of the wire selected from one of,
• between 25% and 30%, corresponding to the visibility factor being 0.05, or
• between 35% and 42%, corresponding to the visibility factor being 0.08,
• wherein the expansion diameter is in a range between 2.5 mm and 7 mm,
• wherein the lattice structure includes 6 or 8 meshes per mesh ring in case of the expansion diameter Dex being between 2.5 mm and 3.5 mm,
• wherein the lattice structure includes 6 or 8 or 10 or 12 meshes per mesh ring in case of the expansion diameter Dem being between 3.5 mm and 5.0 mm, and
• wherein the lattice structure includes 8 or 10 or 12 or 14 or 16 meshes per mesh ring in case of the expansion diameter Dem being between 5.0 mm and 7.0 mm.