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Stent and stent conveying system

A branch and body technology, applied in the field of stent and stent delivery system, can solve the problem that the stent cannot adapt to the change of the diameter of the patient's body pipeline, and achieve the effect of facilitating recovery and less trauma

Inactive Publication Date: 2021-04-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the stent in the prior art cannot adapt to the diameter change of the patient's body pipeline, thereby providing a stent and a stent delivery system

Method used

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  • Stent and stent conveying system

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides as figure 1 and figure 2 In the shown bracket, the bracket includes a variable-diameter structure, and the variable-diameter structure can be retracted and adjusted along the body tube direction. Specifically, the stent includes a film, a main body stent and a fenestrated structure that are connected to each other. diameter structure; graft attached to body frame and / or fenestration structure. Of course, the window structure may not be provided, which can be determined according to the use requirements. Wherein the body pipeline can be a blood vessel and / or trachea and / or digestive tract and / or ureter, for example, when the stent is delivered into the blood vessel, and the corresponding blood vessel includes the aorta or branch blood vessels, then the main body pipeline refers to the main body pipeline at this time Arteries, branches Body conduits refer to branched blood vessels.

[0038]Wherein the stent can be made of filaments greater th...

Embodiment 2

[0046] This embodiment provides a stent, which differs from the stent provided in Embodiment 1 in that the diameter-reducing structure is different. For details, see image 3 and Figure 4 , the variable diameter structure in this embodiment is a claw-shaped body. The claw-shaped body includes a claw arm 41 and a claw root 42. The claw arm 41 extends into the branch body pipeline and extends along the axial direction of the branch body pipeline and is arranged inwardly. , that is, similar to a cone-shaped structure, the claw root 42 is arranged close to the main body bracket.

[0047] The use process of the stent in this example: In the balloon dilatation operation, after the radiography is completed and the lesion is determined, the stent delivery system is sent into the stent delivery system through a guide wire, wherein the stent delivery system includes a balloon and a stent, and after the balloon is pre-expanded , the balloon with stent can pass through smoothly; when t...

Embodiment 3

[0049] This embodiment provides a stent, which differs from the stent provided in Embodiment 1 in that the diameter-reducing structure is different. For details, see Figure 5 , the variable diameter structure in this embodiment is the first wave-shaped annular body 5, and the wave direction of the first wave-shaped annular body 5 faces the wall surface of the branch body pipeline. There is one first corrugated annular body 5 and extends along the axial direction of the branch body pipeline. As an alternative embodiment, multiple first wave-shaped annular bodies 5 may also be provided, and the multiple first wave-shaped annular bodies 5 are arranged in parallel along the axial direction of the branch body pipeline.

[0050] The use process of the stent in this example: In the balloon dilatation operation, after the radiography is completed and the lesion is determined, the stent delivery system is sent into the stent delivery system through a guide wire, wherein the stent del...

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Abstract

The invention discloses a stent and a stent conveying system. The stent comprises a variable-diameter structure, and the variable-diameter structure can be arranged along a body pipeline in a retractable and adjustable mode. According to the stent of the structure, the variable-diameter structure is arranged, the variable-diameter structure can be better matched with the pipe wall of the body pipeline through a balloon dilatation operation along with the growth of the body pipeline of a patient, that is, the variable-diameter structure can be expanded along with the change of the pipe diameterof the body pipeline, and therefore the normality and supply of the body pipeline are guaranteed; and compared with a stent replacement operation in the prior art, the balloon dilatation operation belongs to a minimally invasive operation, the trauma of the operation is small, the stent replacement operation belongs to an incision operation, and the trauma of the operation is larger, so that theballoon dilatation operation is more beneficial to recovery of the patient.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a stent and a stent delivery system. Background technique [0002] There are countless various body pipes inside the living body. They are thick, thin, and twisty, all over the inside of the living body. Although they have different shapes and functions, they are indispensable for division of labor and cooperation. Body pipelines include blood vessels, trachea, digestive tract, ureter, etc., where blood vessels include the aorta and branch vessels. [0003] According to statistics, about 100,000 newborns suffer from congenital heart disease every year in my country, and the incidence rate is about 6.7‰. Coarctation of aorta (CoA) is a rare cardiovascular malformation in children, and coarctation of aorta is considered to be a complex vascular system disease, not limited to aortic stenosis, it includes multiple Segmental stenosis or long segment dysplasia. The stenosis ...

Claims

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Application Information

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IPC IPC(8): A61F2/89A61F2/958
CPCA61F2/89A61F2/958
Inventor 孙安强陈雅兮樊瑜波邓小燕康红艳
Owner BEIHANG UNIV
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