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Pulmonary valve stents to prevent displacement

A pulmonary artery and valve technology, applied in the field of medical devices, can solve problems such as stent displacement, avoid blood vessel tearing, improve stability, and avoid displacement

Active Publication Date: 2015-08-26
NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, it still does not solve the problem of stent displacement well

Method used

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  • Pulmonary valve stents to prevent displacement
  • Pulmonary valve stents to prevent displacement
  • Pulmonary valve stents to prevent displacement

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0047] Such as figure 1As shown, a displacement-preventing pulmonary valve stent includes a valve sewing section 1 and an artificial valve 2, the artificial valve 2 is connected to the valve sewing section 1, and the valve sewing section 1 When released, it is located on the right ventricular outflow tract or the main pulmonary artery 10. The valve stent also includes a limiting mechanism 3, and the bottom part 32 of the limiting mechanism 3 is connected to the distal end of the valve sewing section 1. Connected, the top part 31 of the limiting mechanism 3 is released and interferes with the intersection 30 of the main pulmonary artery and its branches, providing an axial limiting function.

[0048] The top portion 31 of the limiting mechanism is a self-expanding stent made of shape-memory material or elastic material, more preferably nickel-titanium shape-memory alloy. As a preferred embodiment, such as Figure 2a and 2b As shown, the top portion 31 of the limiting mechani...

specific Embodiment 2

[0051] A displacement-preventing pulmonary valve stent, comprising a valve sewing section 1 and an artificial valve 2, the artificial valve 2 is connected to the valve sewing section 1, and the valve sewing section 1 is positioned at On the right ventricular outflow tract or the main pulmonary artery 10, the valve stent also includes a limiting mechanism 3, the bottom part 32 of the limiting mechanism 3 is connected to the distal end of the valve sewing section 1, and the After the top part 31 of the limiting mechanism 3 is released, it interferes with the junction 30 of the main trunk and branches of the pulmonary artery, providing an axial limiting function.

[0052] The top part 31 of the limiting mechanism is a self-expanding stent made of shape-memory material or elastic material, preferably nickel-titanium shape-memory alloy. As a preferred embodiment, such as Figure 8 As shown, the self-expanding stent is a bowl-shaped mesh stent 6, so that it softly touches the inner...

specific Embodiment 3

[0060] The difference between this embodiment and the specific embodiment 2 is that the top part 31 of the limiting mechanism is an air-filled or liquid-filled balloon 7, and the balloon is flat to avoid blocking the branch vessels of the pulmonary artery after collision. Such as Figure 9 As shown, the balloon 7 is provided with an inflatable or liquid-filled valve 72, which inflates the balloon 7 to act as a buffer and limiter, preventing the top of the limiter 3 from damaging the vessel wall. In addition, the connecting member 5 is a continuation of the skeleton of the leaflet 41 of the petal-shaped stent 4 .

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Abstract

The invention relates to an anti-displacement pulmonary valve stent which comprises a valve suture section (1) and an artificial valve (2), wherein the artificial valve (2) is connected with the valve suture section (1); and after the valve suture section (1) is released, the valve suture section (1) is located on an outflow tract of a right ventricle or a main pulmonary artery (10). The anti-displacement pulmonary valve stent further comprises a limiting mechanism (3), wherein a bottom end part of the limiting mechanism (3) is connected with a far end of the valve suture section (1); and after a top end part (31) of the limiting mechanism is released, the top end part is propped against an intersection (30) of the main pulmonary artery and a branch pulmonary artery. According to the anti-displacement pulmonary valve stent, the limiting mechanism is arranged at the far end of the pulmonary valve stent, and is propped against an inner wall of a blood vessel at the intersection of the main pulmonary artery and the branch pulmonary artery after the limiting mechanism is released, and the valve stent can be limited axially, so that the stability of the pulmonary valve stent is improved, and the displacement of the pulmonary valve stent is avoided.

Description

Technical field: [0001] The invention belongs to the field of medical devices, and in particular relates to a displacement-preventing pulmonary valve stent. Background technique: [0002] Percutaneous pulmonary valve replacement (PPVR) refers to the implantation of an artificial valve stent into the native pulmonary valve through a catheter through a peripheral venous approach to replace the dysfunctional pulmonary valve. In September 2000, for the first time, Bonhoeffer et al. successfully implanted an artificial stent with a valve in the pulmonary artery through the percutaneous approach of the femoral vein in a 12-year-old patient with severe stenosis of the right ventricular outflow tract-pulmonary valve, creating a precedent for PPVR. By the end of 2008, more than 600 patients around the world have successfully implemented PPVR. [0003] The main problems facing PPVR today include: the fixation of the valve stent, paravalvular leakage, and how to ensure the function of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/24
Inventor 李毅斌徐志云孙建国张鹏云信朝华
Owner NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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