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Intravascular stent

A vascular stent and stent tube technology, applied in the field of vascular stents, can solve the problems of potential safety hazards, easy movement of the sub-rack tube 10', easy displacement or falling off, etc., to achieve the effect of avoiding displacement

Active Publication Date: 2019-05-03
LIFETECH SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if figure 2 and image 3 As shown, the mechanical properties of the sub-stent tube 10' itself will also bring certain safety hazards: with the pulsation of the aortic arch, the sub-stent tube 10' is prone to move, even when the anchoring force of the sub-stent tube 10' is weak. There will be a phenomenon that the branch tube 10' falls off and falls into the distal end of the branch vessel or into the aorta (such as figure 2 and image 3 The direction pointed by the middle arrow is the falling direction of the branch pipe 10')
[0005] In this regard, it is necessary to propose a new vascular stent for the technical problem that the existing sub-stent tube 10' is prone to shift or fall off after being implanted at the fenestrated position of the main stent tube 20'.

Method used

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Examples

Experimental program
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Embodiment 1

[0039] Such as Figure 4 As shown, the present embodiment provides a first vascular stent 10, comprising a first inner stent tube 11, a first proximal support 12 and a first distal support 13, the first proximal support 12 and a second A distal support member 13 is respectively disposed on the outer wall of the first inner stent tube 11 . Such as Figure 5 As shown, when the first vascular stent 10 is in the compressed configuration, the first proximal support member 12 and the second distal support member 13 are in a folded state and are close to the outer wall of the first inner layer stent tube 11 (such as Figure 5 middle dotted line); when the first vascular stent 10 transforms from the compressed configuration to the expanded configuration, the first proximal support 12 expands towards the distal direction of the first vascular stent 10, and the first distal support 13 moves toward The proximal end of the first vascular stent 10 is deployed.

[0040] Specifically, suc...

Embodiment 2

[0056] The same parts of the second vascular stent 20 of Embodiment 2 and the first vascular stent 10 of Embodiment 1 will not be repeated here. The main differences between the two are as follows: Figure 8 As shown, the second embodiment provides a second vascular stent 20, the second vascular stent 20 is composed of a second inner stent tube 21, a second proximal support 22 and a second distal support 23, the second Both the proximal support 22 and the second distal support 23 are composed of a plurality of V-shaped connecting rods. The V-shaped connecting rods can be braided from nickel-titanium wires, or can be cut from nickel-titanium tubes and heat-set. A plurality of V-shaped connecting rods can be connected to each other, and can also be arranged on the second inner support tube 21 at intervals. The plurality of V-shaped connecting rods of the second proximal support 22 and the plurality of V-shaped connecting rods of the second distal support 23 are each provided wit...

Embodiment 3

[0061] The same parts of the third vascular stent 30 of Embodiment 3 and the first vascular stent 10 of Embodiment 1 will not be repeated here. The main differences between the two are as follows: Figure 9 with Figure 10 As shown, the third embodiment provides a third vascular stent 30, the third vascular stent 30 is composed of a third inner stent tube 31, a third proximal support 32 and a third distal support 33, the third At least one layer of film is provided on the proximal support 32 to prevent endoleaks from occurring. The third near-end support 32 and the third distal support 33 can be made of a plurality of single support rods, the connection end of the third proximal support 32 is connected to the free end of the third distal support 33 through a flexible The connecting piece 34 is connected, and the flexible connecting piece 34 may be made of a film-covered material. For example, the flexible connecting piece 34 integrally covers the metal skeleton of the third p...

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PUM

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Abstract

The invention relates to the technical field of post-intervention medical apparatuses, in particular to an intravascular stent. The intravascular stent aims to solve the technical problem that a conventional intravascular stent is easy to shift or fall down after being transplanted in a main stent pipe of blood vessels. In order to realize the purpose, the invention provides the intravascular stent, and the intravascular stent comprises an inner layer stent pipe and a near end support member and a far end support member which are arranged on the outer wall of the inner layer stent pipe; when the intravascular stent is in a compression structure, the near end support member and the far end support member are both folded and close to the outer wall of the inner layer stent pipe; and in the process that the intravascular stent is transmitted into an expanding structure from the compression structure, the free end of the near end support member extends towards the far end of the intravascular stent, and the free end of the far end support member extends to the near end of the intravascular stent. The intravascular stent disclosed by the invention can be in anchoring connection to the main stent pipe in the blood vessels through the near end support member and the far end support member, so that the phenomena that the intravascular stent shifts or falls off after being transplantedinto the main stent pipe can be avoided.

Description

technical field [0001] The invention relates to the technical field of interventional medical devices, in particular to a blood vessel stent. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] In the prior art, when endovascular repair is used to treat aortic dissection or aortic aneurysm, it is often difficult to implant a large stent into a blood vessel due to the insufficient length of the proximal large stent anchoring area. At this time, some Experienced doctors will choose to increase the proximal anchoring area of ​​large stents by establishing an anchoring area covering branch vessels, among which, the chimney technique or in situ fenestration technique is the most commonly used method to establish an anchoring area covering branch vessels Technology. [0004] Such as figure 1 As shown, the branch blood vessels opened by the in-situ fenestration technology wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/844
CPCA61F2/90A61F2230/005A61F2220/0025A61F2250/0039A61F2230/0052A61F2/856A61F2250/006A61F2/844A61F2/852A61F2002/828A61F2210/0076A61F2/848A61F2002/821
Inventor 王逸斐肖本好
Owner LIFETECH SCI (SHENZHEN) CO LTD