Vertebral artery stent and manufacturing method thereof

A vertebral artery, straight rod technology, applied in the field of medical devices, can solve the problem of not having high radial support force, fatigue resistance and flexibility, etc., to increase radial support force, improve flexibility, and reduce pathological changes. Ability-enhancing effect

Pending Publication Date: 2017-08-25
MICROPORT NEUROTECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the objectives of the present invention is to provide a vertebral artery stent and its manufacturing method, so as to solve the problem that the existing stents for the vertebral artery do not have high radial support force, fatigue resistance and flexibility

Method used

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  • Vertebral artery stent and manufacturing method thereof
  • Vertebral artery stent and manufacturing method thereof
  • Vertebral artery stent and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] The vertebral artery stent is composed of 7 first unit ring structures and 16 connection structures, including 4 "n"-shaped first connection structures and 12 second connection structures composed of "s"-shaped curved parts connected to straight parts . The thickness of the stent is 100 μm, and the laser cutting technology is used to cut out the groove loaded with the drug coating. The groove width is 55 μm and the depth is 30 μm. 60%. The width of the first straight rod structure and the second straight rod structure of the first unit ring structure is 96 μm, the ring width of the first ring end structure and the second ring end structure is 91 μm, the first straight rod structure and the second straight rod structure Slightly about 5% wider than the transition structure, the length of the second straight bar structure is 25% shorter than the length of the first straight bar structure.

Embodiment 2

[0087] The vertebral artery stent is composed of 10 first unit ring structures and 22 connection structures, including 4 "n"-shaped first connection structures and 18 second connection structures composed of "s"-shaped curved parts connected to straight parts . The thickness of the stent is 100 μm, and the laser cutting technology is used to cut out the groove loaded with the drug coating. The groove width is 60 μm and the depth is 25 μm. 65%. The width of the first straight rod structure and the second straight rod structure of the first unit ring structure is 107 μm, the ring width of the first ring end structure and the second ring end structure is 91 μm, the first straight rod structure and the second straight rod structure Slightly about 15% wider than the transition structure, the length of the second straight bar structure is 35% shorter than the length of the first straight bar structure.

Embodiment 3

[0089] The vertebral artery stent is composed of 12 first unit ring structures and 20 connection structures, including 8 "n"-shaped first connection structures and 16 second connection structures composed of "s"-shaped curved parts connected to straight parts . The thickness of the stent is 110 μm, and the laser cutting technology is used to cut out the groove loaded with the drug coating. The groove width is 50 μm, and the depth is 30 μm. 70%. The width of the first straight rod structure and the second straight rod structure of the first unit ring structure is 100 μm, the ring width of the first ring end structure and the second ring end structure is 91 μm, the first straight rod structure and the second straight rod structure Slightly about 9% wider than the transition structure, the length of the second straight bar structure is 30% shorter than the length of the first straight bar structure.

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Abstract

The present invention provides a vertebral artery stent and a manufacturing method thereof. The vertebral artery stent includes a plurality of first unit ring structures, a plurality of second unit ring structures and a plurality of connection structures, wherein: a plurality of the first unit The ring structure and the multiple second unit ring structures are axially arranged; the connection structure connects the multiple first unit ring structures and the multiple second unit ring structures, so that the multiple first unit ring structures structure and a plurality of the second unit ring structures form a net columnar structure; the mesh area formed between the adjacent first unit ring structures is smaller than the network formed between the adjacent second unit ring structures Hole area; each of the connecting structures includes a straight connecting rod arranged along the axial direction of the columnar structure, and an "S"-shaped structure connected with the straight connecting rod. The invention solves the problem that the existing support for vertebral artery fails to have high radial support force, flexibility and fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a vertebral artery stent and a manufacturing method thereof. Background technique [0002] Atherosclerosis in the vertebral-basilar artery system is one of the main causes of posterior circulation stroke, and about one-fifth of posterior circulation stroke occurs in the extracranial segment of the vertebral artery. There are many treatment options for symptomatic vertebral artery stenosis: secondary prevention with antiplatelet aggregation drugs alone, the annual stroke incidence rate is still as high as 15%; warfarin therapy is as effective as aspirin therapy, but the risk of bleeding is much lower increase; the surgical procedure is complicated, the risk is high, and its widespread clinical application is also limited. Vertebral artery stenosis has little effect on drug treatment, and the risk of surgery is too high and the limitations are too large. Endovascular treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/89
CPCA61F2/07A61F2/89A61F2230/0006A61F2230/0069A61F2250/0029A61F2250/0067
Inventor 邹秋华于海瑞陈叶刘迎金巧蓉谢志永
Owner MICROPORT NEUROTECH SHANGHAI
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