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Vascular stent

A technology of vascular stents and support rings, applied in the field of vascular stents, can solve problems such as poor overall stent adhesion, delayed skinning time, increased endoleak, thrombus restenosis and even rebleeding, etc., to improve flexibility and adhesion sex, reduce complications, and accelerate the effect of vascular endothelialization

Pending Publication Date: 2019-04-19
SHANGHAI SIXTH PEOPLES HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of covered stent has some problems, such as poor overall stent adhesion and delayed endothelialization time of the stent segment (>6 months), which increases the risk of endoleak, thrombus, restenosis and even rebleeding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] An exemplary embodiment of the present invention, such as Figure 1~2 As shown, a blood vessel stent includes a plurality of support rings 1 and a plurality of connecting rods 3, the support rings 1 are sequentially arranged at the proximal end, the distal end and the middle part of the blood vessel stent, and two adjacent support rings 1 pass through the connecting rods 3 connected.

[0057] The vascular stent is made of chromium-based alloy, preferably L605 chromium-based alloy.

[0058] The vascular stent made of chromium-based alloy has high strength and can maintain the proper radial support strength after the wire is thinned. At the same support strength, it uses less material and has good flexibility. It can be clearly seen under X-rays. Developing, good NMR compatibility, good biocompatibility, and low price.

[0059] The support ring 1 is composed of multiple unit waves 2 , specifically, each support ring 1 is composed of at least five unit waves 2 .

[0060...

Embodiment 2

[0087] The vascular stent of this embodiment is basically the same as the vascular stent of Embodiment 1, except that the connecting rod 3 is different.

[0088] The vascular stent of this embodiment, such as Figure 4~5 As shown, a blood vessel stent includes a plurality of support rings 1 and a plurality of connecting rods 3, the support rings 1 are sequentially arranged at the proximal end, the distal end and the middle part of the blood vessel stent, and two adjacent support rings 1 pass through the connecting rods 3 connected.

[0089] The structures of the support ring 1 and the unit wave 2 are the same as those in the first embodiment, and will not be repeated here.

[0090] The connecting rod 3 is composed of a first connecting portion 4, and the first connecting portion 4 is an N-shaped connecting portion or a Z-shaped connecting portion.

[0091] Such as Figure 5 As shown, the centerline of the first connecting portion 4 (ie, the dotted line in the figure) is arr...

Embodiment 3

[0095] The vascular stent of this embodiment is basically the same as the vascular stent of Embodiment 1, except that the connecting rod 3 is different.

[0096] The vascular stent of this embodiment, such as Figure 6~7 As shown, a blood vessel stent includes a plurality of support rings 1 and a plurality of connecting rods 3, the support rings 1 are sequentially arranged at the proximal end, the distal end and the middle part of the blood vessel stent, and two adjacent support rings 1 pass through the connecting rods 3 connected.

[0097] The structures of the support ring 1 and the unit wave 2 are the same as those in the first embodiment, and will not be repeated here.

[0098] The connecting rod 3 is composed of a first connecting portion 4 and a second connecting portion 5 , wherein the first connecting portion 4 is an S-shaped connecting portion, and the second connecting portion 5 is a linear connecting portion.

[0099] The second connection part 5 is arranged on th...

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Abstract

The invention relates to a vascular stent. The vascular stent comprises multiple supporting rings and multiple connecting rods, and the supporting rings are arranged at the near end and the far end ofthe vascular stent and in the middle of the vascular stent, and are composed of multiple unit waves; every two adjacent supporting rings are connected through a connecting rod; the connecting rod between every two adjacent supporting rings is connected to the wave tops of the two corresponding adjacent unit waves through a top-to-top mode; each connecting rod is composed of one or more first connecting parts, and the first connecting parts are one or a combination of S-shaped connecting parts, N-shaped connecting parts and Z-shaped connecting parts. The vascular stent has the advantages thatby improving the structure, the number of segments of the vascular stent si decreased, the distance between the segments is increased, accordingly, the coverage rate of metal of the stent is decreased, and the flexibility and wall attachment of the vascular stent are improved; multiple holes are formed in a film covering unit, so that the permeability of the film covering unit is improved; statindrugs are loaded onto the film covering unit to accelerate endothelialization of blood vessels.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a blood vessel stent. Background technique [0002] The incidence rate of intracranial aneurysm is about 0.2% to 8%, and the natural death rate and disability rate after rupture and hemorrhage are as high as 65%, which seriously threatens the health of the people. Although with the continuous development of interventional embolic materials, more and more intracranial aneurysms have been effectively treated, and endovascular interventional therapy has been accepted by more and more patients due to its minimal invasiveness, but intracranial wide Carotid aneurysm (neck ≥ 4 mm or neck / body > 1 / 2) has always been a difficult problem in endovascular interventional therapy, with incomplete embolization rate and recurrence rate exceeding 40%. Traditional endovascular treatment methods include occlusion of the re-neoplastic artery and stent-assisted coil embolization. The form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/86
CPCA61F2/07A61F2/86A61F2002/072A61F2250/0067A61F2250/0098
Inventor 王武李明华顾斌贤孙永宁谢志永
Owner SHANGHAI SIXTH PEOPLES HOSPITAL
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