Stent device with draped skirt, machining method, skirt draping method and heart valve

A stent device and skirt technology, applied in heart valves, medical science, balloon catheters, etc., can solve problems such as complex stents, excessive length of the product, increased complexity and difficulty of control, and avoid the use of metal parts , Safe and convenient to use

Pending Publication Date: 2019-03-05
VENUS MEDTECH (HANGZHOU) INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the flexible film is located on one side of the stent axis before it is released, which will inevitably cause the product to be too long as a whole, which puts higher requirements on the conveying system. More importantly, in order to realize the rolling or folding of the flexible film, an additional traction mechanism must be provided. It is controlled by the operator, which increases the complexity and difficulty of the control. The

Method used

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  • Stent device with draped skirt, machining method, skirt draping method and heart valve
  • Stent device with draped skirt, machining method, skirt draping method and heart valve
  • Stent device with draped skirt, machining method, skirt draping method and heart valve

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Embodiment 1

[0283] see Figure 1b , Figure 1c , the stent device of this embodiment includes a stent 1, and a flexible skirt 2 is arranged on the periphery of the stent 1. Before the stent 1 is released (that is, the radial expansion section), the stent is in a radially compressed state. Before the intervention, the stent is loaded into the delivery In the system and restrained by the sheath, it is generally in a so-called compressed state.

[0284] The skirt 2 of the stent 1 is in a spread state before it is released. It stretches axially and surrounds the periphery of the stent 1 before it is released. To obtain a relatively small outer diameter, the skirt is also required to spread as much as possible to avoid discounting or overlapping.

[0285] During the release process of the stent, at least a part of the skirt gradually tightens the expanded stent, and when the stent is further released, the axial lifting of the skirt is triggered to form a peripheral leakage sealing part.

[...

Embodiment 2

[0296] see figure 2 , in this embodiment, a flexible skirt is provided on the periphery of the stent 1, and the skirt is in a spread state before the stent 1 is released, stretches axially and surrounds the periphery of the stent 1 before the release, and the skirt is in a stacked state after the stent 1 is released, The stack is gathered along the axial direction of the released stent to form a ring-shaped peripheral leakage sealing part.

[0297] In this embodiment, the skirts are two axially arranged, skirts 2a and 2b respectively. During the release process of the stent, at least a part of the skirts gradually tighten the expanded stent, and with the further release of the stent, Axial pulling of the skirts is triggered, and each skirt is pulled axially and stacked to form corresponding peripheral leakage sealing parts. In order to adapt to the axial position change of the skirt and prevent the skirt from detaching from the bracket, flexible limit cables 2c are respectiv...

Embodiment 3

[0299] see Figure 3a and Figure 3b , in this embodiment, the periphery of the bracket 1 is provided with a flexible skirt 2, the skirt 2 is in a spread state before the bracket 1 is released, stretches axially and surrounds the periphery of the bracket 1 before the release, after the bracket 1 is released, the skirt 2 is In the stacked state, the stent 1 is folded and stacked along the axial direction of the released stent 1 to form a ring-shaped peripheral leakage sealing part.

[0300] In this embodiment, the stent 1 is a vascular stent, which can be used in large blood vessels such as the aorta. The shape and features of the stent in the previous embodiment are different in terms of the location of use, but the skirt setting and working principle are similar.

[0301] In this embodiment, the skirt 2 is made of elastic material, and is tightened around the periphery of the bracket when the bracket is released. During the release process, the skirt and the bracket are not y...

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Abstract

The invention discloses a stent device with a draped skirt, a machining method, a skirt draping method and a heart valve. The stent device comprises a stent and is also provided with the flexible skirt, wherein the skirt axially extends and surrounds the periphery of the front stent in a spread state, is driven by the deformation during stent release to be closed up and stacked in the axial direction of the released stent and forms an annular peripheral leakage plugging portion in a stacked state. The interventional stent is better anastomosed with the inner wall of the blood vessel by adopting a peripheral leakage preventing technology, the stent is not prone to shifting and is more stable, the application range is widened, the surgical additional risk is reduced, and peripheral leakage,thrombus and other complications are prevented and treated. A better hemodynamic property is provided, a climbing-attaching function of endothelial cells of a host is enhanced, the occurrence probability of endocarditis is reduced, and normal blood supply functions of the heart and the blood vessels are rehabilitated.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an artificial stent device for heart and blood vessels. Background technique [0002] Since the 1970s, artificial heart valve (Artificial Heart Valve) replacement, as an effective means of treating end-stage heart valve diseases, has saved the lives of millions of patients. Artificial heart valve replacement technology is a revolutionary breakthrough in heart valve treatment technology, with broad prospects. [0003] Perivalvular leak (PPL) is a unique serious complication after valve replacement and is one of the common reasons for reoperation. The main reasons for its occurrence are the pathological changes of the valve ring tissue (degeneration, rheumatic or senile calcification, acute infective endocarditis invading the valve ring or producing paravalvular abscess), the size of the artificial valve and the valve ring does not match, and the artificial associated wit...

Claims

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Application Information

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IPC IPC(8): A61F2/24
CPCA61F2/2418A61F2/2427A61F2/2436A61F2/2409A61F2/2415A61F2/2439A61F2220/0008A61F2250/0051A61F2/2433A61F2220/0016A61F2220/0075A61F2210/0057A61F2250/0069
Inventor 邝大军齐均曾敏余金城范罗阮莱
Owner VENUS MEDTECH (HANGZHOU) INC
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