Conformal wall-attached endovascular stent

Abstract

The invention relates to a conformal wall-attached endovascular stent and involves the field of vascular interventional medical equipment. A CT image is used for reconstructing an individualized vascular stenosis model for a user, and a closed-loop tubular mesh stent is mapped to a vascular wall through a three-dimensional mapping method to obtain a conformal wall-attached stent structure. The diameters of mesh wires of the stent are increased at the narrowest part so as to increase supporting force, and a fluorescent marking point is set on the surface of the stent to ensure positioning and posture correction of the stent. If a processing method combining adhesive jet with selective laser sintering / melting is adopted, model data is directly guided out to a 3D printer for molding; if a processing method of melt extrusion is adopted, a vascular lumen mold with a stent groove structure is constructed prior to 3D printing; if a knitting technology is adopted for stent processing, knittingis carried out along the groove structure of the mold, and then a heat treatment method is used for shaping. The conformal wall-attached endovascular stent adapt to the shapes of individualized vascular stenoses of patients, and can be attached to the inner walls of blood vessels seamlessly and closely to ensure the uniform coverage of the vascular endothelium.

Description

technical field [0001] The invention relates to the field of vascular interventional medical equipment. Specifically, it relates to a structural design of a conformal adhering stent that can be seamlessly attached to the inner wall of a blood vessel that adapts to a patient's personalized stenotic blood vessel model and a processing technology using 3D printing technology. Background technique [0002] At present, stent implantation, as the main way to treat vascular stenosis, is accepted by more and more doctors and patients. Vascular stent, as a tiny tube network structure, is implanted in the stenotic segment of the blood vessel to expand and support the diseased part to ensure the repair and reconstruction of the diseased blood vessel. [0003] Stenotic vascular plaques are mostly thick in the middle and thin at both ends. Therefore, after the stent expands and rebounds in the stenotic blood vessel, there will inevitably be a dog-bone effect with severe rebound in the m...

AI Technical Summary

Problems solved by technology

In this patent, aiming at the problem of poor apposition of traditional structural stents in stenotic vessels, it is innovatively proposed based on the patient's personalized stenotic vessel lumen model, to construct an initial closed-loop tube network stent with variable cross-section, and to increase the stent network at the narrowest part The diameter of the wire is used to increase the support force, and the structure is obtained through a three-dimensional mapping method to obtain a conformable and adherent stent structure that completely fits the inner wall of the patient's stenotic blood vessel

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