A kind of conformal adherent intravascular stent

Abstract

A stent for a conformal wall-attached blood vessel relates to the field of vascular interventional medical equipment. Use CT images to reconstruct the patient's personalized stenotic vessel model, map the closed-loop tube mesh stent onto the vessel wall by three-dimensional mapping method to obtain a conformal and adherent stent structure, and increase the diameter of the stent mesh at the narrowest part to increase the support Set fluorescent marking points on the surface of the bracket to ensure bracket positioning and posture correction; if the processing methods of adhesive jetting and laser selective sintering / melting are used, the model data will be directly exported to the 3D printer for molding; if the processing method of melt extrusion is used method, first build a vascular lumen mold with a stent groove structure and then 3D print; if the braiding technology is used to process the stent, weave along the groove structure of the mold, and then shape it by heat treatment; the conformal The wall-attached stent adapts to the shape of the patient's personalized stenotic blood vessel, and can be seamlessly attached to the inner wall of the blood vessel to ensure 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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