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Degradable stent

A closed loop and combined unit technology, applied in the field of vascular stents, can solve the problems of poor supporting performance of vascular stents, threats to patient health, deformation, etc., achieve good flexibility and deformation adaptability, increase surface coverage, and support performance. Effect

Pending Publication Date: 2021-11-16
南京友德邦医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The support performance of existing vascular stents is poor, and defects such as collapse and deformation are prone to occur under the action of external forces, such as in the process of crimping and releasing, which poses a potential threat to the health of patients

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figure 1 to Figure 3 As shown: this embodiment provides a degradable stent 100, including a plurality of closed rings 1 uniformly arranged at intervals along the axial direction, the closed rings 1 can be radially scaled, and the diameter values ​​of the closed rings 1 can be expanded and scaled in the radial direction The range is 0.5mm-20mm, the value range of the total length of the degradable stent 100 is: 2mm-200mm, two adjacent closed loops 1 are connected by a plurality of bridges 2 uniformly arranged in the circumferential direction, and the upper edge of the bridges 2 Several through holes are evenly arranged in the axial direction, and the shape of the through holes is circular, square, slotted or polygonal. By setting the bridge bar 2 with through holes, stress can be eliminated, and better flexibility and deformation adaptability can be obtained. ; The materials of the closed ring 1 and the bridge rod 2 are polylactic acid, polylactic acid-glycolic ...

Embodiment 2

[0037] Such as Figure 4 As shown: this embodiment provides a degradable stent 100. The structure of the degradable stent 100 in this embodiment is basically the same as that of the degradable stent 100 in Embodiment 1. The first curved rod 10, the second curved rod 11, the third curved rod 12 and the fourth curved rod 13 replace the curved rod 5 of the first embodiment, and the first curved rod 10, the second curved rod 11, the third curved rod The combination formed by the curved rod 12 and the fourth curved rod 13 is itself symmetrical about the axis of symmetry between the corresponding two connecting rods.

Embodiment 3

[0039] Such as Figure 5 As shown: this embodiment provides a degradable stent 100, the structure of the degradable stent 100 in this embodiment is basically the same as that of the degradable stent 100 in Embodiment 1, the difference is that the closed contour 4 in this embodiment All are in the shape of a positive 8.

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Abstract

The invention discloses a degradable stent which comprises a plurality of closed rings arranged at intervals in the axial direction. The closed ring can be radially contracted and contracted; every two adjacent closed rings are connected through a plurality of bridge rods which are evenly arranged in the circumferential direction, and a plurality of through holes are evenly formed in the bridge rods in the axial direction. The closed ring and the bridge rod are made of polylactic acid, polylactic acid-glycolic acid copolymer, zinc, magnesium, iron, zinc alloy, magnesium alloy or degradable polymer. The degradable stent disclosed by the invention is good in supporting performance.

Description

technical field [0001] The invention relates to the technical field of vascular stents, in particular to a degradable stent. Background technique [0002] Vascular stent refers to the placement of internal stents in the diseased segment on the basis of lumen balloon expansion to support the stenotic and occluded segment of the vessel, reduce elastic recoil and reshaping of the vessel, and maintain smooth blood flow in the lumen. Some internal stents can also prevent restenosis. Mainly divided into coronary stents, cerebrovascular stents, renal artery stents, aortic stents, etc. [0003] The support performance of existing vascular stents is poor, and defects such as collapse and deformation are prone to occur under the action of external forces, for example, during the process of crimping and releasing, which poses a potential threat to the health of patients. Contents of the invention [0004] The purpose of the present invention is to provide a degradable stent to solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/89
CPCA61F2/89A61F2210/0004A61F2250/0098A61F2310/00041A61F2310/00083A61F2310/00017
Inventor 郭利斌
Owner 南京友德邦医疗科技有限公司
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