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Covered stent

A covered stent and film-covered technology, which is applied in the field of medical devices, can solve the problems of cervical endoleak, insufficient flexibility and curvature of the covered stent, and achieve the best clinical effect

Pending Publication Date: 2017-11-28
HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a flexible and curved stent that is sufficient to adapt to various degrees of curvature of the aneurysm, aiming at the defect of endoleakage in the overly curved aneurysmal neck caused by insufficient flexibility and curvature of the stent graft in the prior art. cervical stent graft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 As shown, a stent graft includes a framework 100 and a membrane 140 ; ​​the framework 100 includes a main body section 101 and at least one branch section 102 . The skeleton 100 forms a supporting part. The main body section 101 and the branch section 102 are composed of a main body ring bracket and a branch ring bracket respectively, wherein the main body section 101 includes at least five rings of the main body ring bracket arranged at intervals in sequence, and the two branch sections 102 are respectively The long branch section 102 and the short branch section 102 are respectively formed by a plurality of branch annular brackets of different numbers arranged in sequence at intervals. The main body segment 101 , all the main ring stents of the two branch segments 102 , and the branch ring stents are preferably made of nickel-titanium alloy wire with good biocompatibility and superelasticity.

[0045] Such as Figure 1-4As shown, a membrane 140 is f...

Embodiment 2

[0061] Embodiment two: if Figure 10As shown, the skeleton 100 of the stent-graft in Embodiment 2 of the present invention includes a main body section 101 and a branch section 102. The branch section 102 includes a long branch 102A and a short branch 102B. , 111 , 112 , 113 are fixedly arranged on the film 140 through sutures 160 . On the long-branch coating 102A, multiple rings of branch ring-shaped brackets 121 are uniformly arranged at regular intervals, and the short-branch coating 102B is uniformly arranged with multiple rings of branch ring-shaped brackets 131 sequentially arranged at intervals.

[0062] In the stent-graft, the skeleton 100 has various shapes and different arrangements. The difference between the stent-graft of the second embodiment of the present invention and the first embodiment is that the ring-shaped stents 111, 112, and 113 of the main body can be selected as high-low wave The height of the crests or / and troughs of the high and low wave ring sten...

Embodiment 3

[0065] Embodiment 3: This embodiment is an improvement on the basis of Embodiment 1. Such as Figure 11 As shown, compared with Embodiment 1, in addition to providing the wrinkled coating portion 145 on the main section coating 141 , the branch section coating 142 is also provided with the wrinkled coating portion 145 .

[0066] Embodiment 3 of the present invention The covered stent includes a skeleton 100 and a covered membrane 140. The skeleton 100 includes a main body section 101 and a branch section 102. The branch section 102 includes a long branch 102A and a short branch 102B. 111 , 112 , 113 are fixedly arranged on the main body section 101 by sutures 160 . On the long branch section 102A of the coating, multi-turn branched annular brackets 121 are evenly arranged, and the multi-turn branched annular brackets 131 are evenly arranged on the short branch section 102B of the coating.

[0067] Preferably, the wrinkled covering part 145 is at least disposed between adjace...

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Abstract

The invention discloses a covered stent. The covered stent comprises a skeleton and covering films, wherein the skeleton comprises a main body section and at least one branch section, the main body section is composed of a plurality of main body annular brackets which are arranged at intervals in sequence, and each branch section is composed of a plurality of branch annular brackets which are arranged at intervals in sequence; the covering films comprise a main body section covering film which is fixed in the circumferential direction of the main body section, and branch section covering films which are fixedly connected in the circumferential direction of the branch sections; at least the main body section covering film is provided with a folded covering film part, the folded covering film part is at least arranged between the adjacent main body annular brackets, and the folded covering film part is stretched or contracts in the axial direction when the covered stent is under the bent state. The invention provides the covered stent with the flexibility and bending degree being suitable for the neoplasia neck with various bending degrees.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a stent, in particular to a covered stent. Background technique [0002] Abdominal aortic aneurysm (AAA) is the most common type of aneurysm, if not treated in time, the aneurysm may rupture and lead to death. Endovascular aorticrepair (EVAR) of AAA originated at the end of last century. Due to its small trauma and stable curative effect, it has been widely recognized by both doctors and patients. Its related medical manufacturing industry and clinical treatment technology have made great progress, and it has gradually replaced traditional open surgery as the main treatment method for AAA. However, some AAAs with complex anatomical conditions still have great difficulties in the implementation of EVAR surgery. [0003] AAAs with complex anatomical conditions mainly include: (1) short proximal aneurysmal neck <15 mm, (2) twisted proximal aneurysmal neck with an angle &g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07
CPCA61F2/07A61F2002/072
Inventor 王永胜郭伟李安伟尹玉杨
Owner HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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