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Stent

A technology of support unit and turning part, which is applied in the field of medical devices, can solve the problems of delayed endothelialization, formation, and influence on hemodynamics, etc., and achieve the effect of reducing the wall thickness of the stent and reducing the risk of thrombosis

Pending Publication Date: 2020-10-20
SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thicker stents are prone to affect hemodynamics, which may lead to the formation of stent thrombosis, and thicker stents lead to delayed endothelialization and healing.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] refer to figure 1 As shown, the stent 10 provided by an embodiment of the present application includes a plurality of support unit rings 1 and a plurality of connecting rods 2, and the plurality of connecting rods 2 connect the plurality of support unit rings 1 along the axial direction 10c of the stent 10 into a For the network tubular structure, understandably, the extending direction of the central axis of the formed network tubular structure is the axial direction 10c of the stent 10 . structure figure 2 As shown, after a plurality of support units are connected by a plurality of connecting rods 2 to form a network tubular structure, when viewed along the axial direction 10c of the stent 10, it will be in the shape of a ring, that is, it has an opposite inner surface 10a and an outer surface 10b, the stent The wall thickness h of 10 is the distance between the inner surface 10a and the outer surface 10b.

[0035] to combine image 3 as shown, image 3 for figu...

Embodiment 2

[0075] The bracket 10 of this embodiment is the same in composition and connection as in Embodiment 1, except that the number of first turning parts 12 or second turning parts 13 is 9-12, for example 9, 10, 11 or 12. The number of connecting rods 2 is 3-5, such as 3, 4 or 5. The stent 10 formed in this way can adapt to blood vessels with larger diameters and has excellent expandability.

Embodiment 3

[0077] Such as Figure 7 As shown, the structure of the supporting unit ring 1" of the bracket 30 in this embodiment is the same as that of Embodiment 1, and only the structure of the connecting rod 2" is different. Specifically, in the bracket 30 in this embodiment, the connecting rod 2" adopts Relatively smooth structure. The connecting rod 2” includes multiple arc segments, except that the arc segment at the position connected to the support unit ring 1” has obvious curvature, and the radius of curvature is 0.05mm to 0.15mm, such as 0.05mm, 0.1mm Or 0.15mm. The radius of curvature of the arc section in other places is relatively large, and they are connected smoothly. This makes the crimping diameter of the stent 30 smaller, and improves the lesion-passing ability and pushing ability of the stent 30 .

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Abstract

The invention relates to a stent. The stent comprises a plurality of supporting unit rings and a plurality of connecting rods, wherein each supporting unit ring comprises a plurality of posts, a plurality of proximal rotating parts and a plurality of distal rotating parts, the plurality of proximal rotating parts and the plurality of distal rotating parts are alternately connected to proximal endsand distal ends of the plurality of posts, so that the supporting unit rings form a closed cylindrical structure, and the connecting rods are used for being connected with the posts of adjacent supporting unit rings to connect a plurality of support unit rings into a net tubular structure, wherein the connecting rod includes a plurality of successively adjacent wave segments. According to the stent, the support unit ring is of a closed cylindrical structure, and the connecting rods containing a plurality of wave-shaped sections are used for connecting the column rods of adjacent support unitrings, so that the stent is strong in overall anti-extrusion performance and not easy to break, so that wall thickness of the stent can be reduced as much as possible under a condition of maintainingsufficient supporting force, and thrombotic risk and occurrence probability of delayed healing of vascular endothelialization caused by the influence of the wall thickness of the stent can be reduced.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an intraluminal stent. Background technique [0002] Interventional therapy is the introduction of special precision instruments into the human body under the guidance of medical imaging equipment to diagnose and locally treat lesions in the body. Because interventional therapy has the characteristics of no surgery, less trauma, quick recovery and good effect, interventional technology has been popularized and developed in recent years. Among them, percutaneous coronary intervention (PCI) has been more and more widely used in the treatment of heart disease caused by coronary atherosclerosis. This method is mainly completed by implanting an expandable cylindrical mesh stent at the diseased blood vessel. After the stent is implanted, the stent is expanded to open the stenotic blood vessel to achieve the purpose of treatment. [0003] The stent is an implantable device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/915
CPCA61F2/915A61F2002/9155
Inventor 顾凡周奇姚瑶李俊菲
Owner SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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