Peripheral-leakage prevention stent device with covering film, processing method, skirt hem wrinkling method and cardiac valve

A stent device and film-covering technology, which is applied in the field of medical devices, can solve problems such as complex stents, excessive length of the product, and increased complexity and difficulty of control, so as to achieve safe and convenient use and avoid the use of metal parts.

Pending Publication Date: 2019-03-05
VENUS MEDTECH (HANGZHOU) INC
View PDF8 Cites 5 Cited by
  • Summary
  • 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. ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Peripheral-leakage prevention stent device with covering film, processing method, skirt hem wrinkling method and cardiac valve
  • Peripheral-leakage prevention stent device with covering film, processing method, skirt hem wrinkling method and cardiac valve
  • Peripheral-leakage prevention stent device with covering film, processing method, skirt hem wrinkling method and cardiac valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0173] see Figure 2a ~ Figure 2c , 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.

[0174] Such as Figure 2a , in this embodiment, the stent 1 is provided with a valve 1a and an inner membrane 1c, the top edge of the skirt 2 is connected to the stent through a fixing band 3f, the bottom edge of the skirt 2 is connected to the bottom edge of the stent through a fixing band 3g, and the fixing band 3f and the fixing belt 3g can respectively be stitched at intervals or continuously stitched.

[0175] The inner covering film 1c extends to the bottom end of the stent inside the stent, and the bottom edge of the...

Embodiment 2

[0186] see Figure 3a ~ Figure 3c , 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 outer circumference of the bracket 1 before the release, preferably, the circumferential circumference of the skirt The length is equal to or slightly greater than the circumference of the corresponding part of the bracket, so that the skirt is attached to the bracket. The skirt is also provided with a traction cable 4 that drives the skirt into a stacked state, and the traction cable 4 is linked with the radial deformation of the bracket 1 when it is released. When releasing in vivo, the bottom edge of the skirt 2 is released first, and then the top edge of the skirt 2 is released. After the stent 1 is released, the skirts 2 are in a stacked state, and are folded and stacked along the axial direction of the released stent 1 to form a ring-shaped periph...

Embodiment 3

[0199] see Figure 4 , compared with the embodiment 2, the present embodiment is provided with two traction cables 4 along the axial direction, respectively pulling the skirt 2 of the corresponding part at different stages of the release of the stent. The crest of the lower traction cable is higher than the trough of the upper traction cable, and the same traction cable is pulled in a circumferential linkage.

[0200] In order to further express the ups and downs of the traction cable and the skirt, the dotted line in the figure indicates sinking below the skirt, and the solid line indicates floating above the skirt. Since the traction cable does not pass through or be fixed on the bracket, except for the fixed belt, the rest can be used as a suspension section, so the force transmission between the two traction cables can affect each other through the skirt.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a peripheral-leakage prevention stent device with a covering film, a processing method, a skirt hem wrinkling method and a cardiac valve. The stent device comprises a stent, and further comprises a flexible skirt hem. The skirt hem has a spreading state and a piling state, when the skirt hem is in the spreading state, the skirt hem stretches axially and surrounds the outerperiphery of the stent before releasing, and when the skirt hem is in the piling state, the skirt hem is driven by deformation generated when the stent is released and folded and piled in the axial direction of the released stent to form an annular peripheral-leakage prevention blocking part. According to the device, a peripheral-leakage prevention technology is adopted, so that the interventionalstent is more identical to the inner wall of the blood vessel, the stent is not easily displaced and is more stable, the range of applicable people is expanded, the additional risk of an operation isreduced, and complications such as peripheral leakage and thrombus are prevented and treated; better hemodynamic performance is provided, the climbing and covering function of endothelial cells of the host is enhanced, the occurrence probability of endocarditis is reduced, and normal blood supply functions of the heart and blood vessels are restored.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A61F2/24
CPCA61F2/2418A61F2/2427A61F2/2436A61F2/2409A61F2/2415A61F2/2439A61F2220/0008A61F2250/0051A61F2/2433A61F2220/0016A61F2220/0075A61F2210/0057A61F2250/0069
Inventor 曾敏范罗阮莱
Owner VENUS MEDTECH (HANGZHOU) INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap