Medical device, in particular a flow diverter, and kit

A medical device comprising:

• a radially self-expandable lattice structure composed of a plurality of interwoven individual wires, wherein at least some of the individual wires have an X-ray visible core material and a superelastic mantle material, the individual wires forming meshes of the lattice structure that is tubular at least in some regions;
• wherein the lattice structure includes a plurality of directly adjacent 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 core material equals a visibility factor (f) multiplied by a ratio of an expansion diameter (Dexp) in a range from 2.5 mm to 8 mm of the lattice structure over a mesh number (n) of the mesh ring, expressed as dcore=f·(Dexp/n), wherein the visibility factor varies in a range from 0.08 to 0.15,
• wherein the medical device is configured to be disposed in a catheter by displacing the medical device longitudinally, and
• wherein an internal diameter of the catheter is selected from one of,
• 2 Fr to 2.5 Fr, in case of an expansion diameter of 2.0 mm to 3.5 mm,
• 2.5 Fr to 3 Fr, in the case of an expansion diameter of 3.5 mm to 5 mm, or
• 3 Fr to 4 Fr, in the case of an expansion diameter of greater than 5 mm.