PERIPHERAL STENT AND ITS MANUFACTURING METHOD Russian patent published in 2022 - IPC A61F2/91 

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, namely to life-long implantable endoluminal prostheses, more specifically, the present invention relates to self-expanding metal stents made of material with shape memory, as well as to their manufacture. A peripheral stent having a longitudinal axis and a transverse axis, made with the possibility of transfer from a compressed configuration to an extended configuration, contains a tubular mesh structure. The tubular mesh structure includes crowns, each of which contains the first vertices and the second vertices connected with spacers into a sinusoid ring. Neighboring crowns are interconnected with 3-6 jumpers. Crowns are made of material with shape memory, including nickel and titanium. A thickness at any point of the tubular mesh structure differs from an average thickness of the entire tubular mesh structure for no more than 25%. The tubular mesh structure includes holders, in which radiopaque markers are fixed. A method for the manufacture of the above-described stent includes following stages: a tubular mesh structure including crowns, jumpers, and holders of radiopaque markers is manufactured by a laser cutting method; the tubular mesh structure is subjected to thermal processing including heating of the tubular mesh structure to an annealing temperature, which is from 450°C to 540°C, incubation of the tubular mesh structure at the first temperature, and cooling of the tubular mesh structure to the second temperature; the tubular mesh structure is subjected to chemical etching in a medium including a mixture of acids; the tubular mesh structure is subjected to electric polishing; radiopaque markers are fixed in holders.

EFFECT: provision of a possibility of transluminal delivery to a treatment site, low traumatism for patient’s vessels, reliable fixation of a stent at an implantation site, even controllable expansion of the stent during implantation.

15 cl, 22 dwg, 3 tbl