New truss-type human body pipeline support

Abstract

The invention discloses a novel truss type human body pipeline stent which comprises at least one layer of telescopic structures. Each telescopic structure comprises a first frame, a second frame, a third frame, a first connecting rod and a second connecting rod, wherein the first frame comprises at least three assemblies, the assemblies comprise long rods and short rods, the circumferential arrays of at least three assemblies form the first frame, the first frame and the third frame are identical and completely opposite to each other, and the second frame is obtained by overturning the firstframe and rotating the first frame. The centers of the arrays of the second frame and the third frame are collinear, the convex points of the first frame, the second frame and the third frame are connected through a first connecting rod, and the concave points of the first frame, the second frame and the third frame are connected through a second connecting rod. According to the novel truss type human body pipeline stent, the axial length of the stent can be extended in the expansion process, so that the lesion part is completely covered, and the sufficient actual contact area between the stent and a human body pipeline is ensured.

Description

technical field [0001] The invention relates to the technical field of human body pipeline support, in particular to a novel truss type human body pipeline support. Background technique [0002] Coronary heart disease, myocardial infarction, esophageal obstruction, esophageal stenosis, central airway organic stenosis and other diseases seriously threaten human health. At present, the most effective way to treat such diseases caused by narrowing and blocking human pipelines is stent implantation. [0003] Stent implantation refers to a technology that uses techniques such as puncture, catheter, balloon catheter expansion and metal stent placement to expand and recanalize narrowed or occluded blood vessels or lumens, and solve traditional surgical blind spots. Interventional therapy has the advantages of less trauma, high curative effect, low risk, fewer complications, and shorter hospital stay, creating a new way for the treatment of stenosis or occlusion of blood vessels and...

AI Technical Summary

Problems solved by technology

[0004] The axial shortening of traditional stents occurs during radial expansion, and the greater the radial expansion, the more obvious the axial shortening, which may lead to incomplete coverage of the lesion and greatly affect the treatment effect

[0005] In addition, traditional supports are mostly two-dimensional designs, that is, they are planar structures after being cut along the generatrix of the support and unfolded.

After the structure expands in the radial direction, the grid structure on the wall of the cylindrical stent stretches and opens, and the cells of the grid will become larger, and the larger the expansion of the stent, the larger the cells will become, which will result in The actual contact area of ​​the human body pipeline wall decreases sharply, so that the load on the human body pipeline wall cannot be effectively shared on the grid structure of the stent, resulting in damage to human tissue, and even the stent cannot provide sufficient radial strength and the stent is crushed

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