transcatheter valve replacement system

Abstract

This application relates to a transcatheter valve replacement system, including a valve replacement prosthesis, a delivery catheter, a control handle and an anchoring device. In the valve stent, the self-adaptive stent-graft is connected to the periphery of the valve stent, and an anchored unit is provided on the valve replacement prosthesis, and the anchored unit is fixed on the heart tissue through an anchoring device, and the anchoring device is set on the delivery catheter Inside, the anchoring device includes an anchoring needle, an anchoring needle catheter, an anchoring needle pushing rod, and a controllable guide device. The anchoring needle is preinstalled in the distal end of the anchoring needle catheter, and the distal end of the anchoring needle catheter Part of it is a bendable structure, and one end of the controllable guiding device is detachably connected to the anchored unit. The controllable guiding device can control the distal part of the anchoring needle catheter to form a fixed angle in the radial direction and make the anchoring needle catheter The distal end is attached to the anchored unit.

Description

technical field [0001] The invention relates to a medical device, in particular to a transcatheter valve replacement system. Background technique [0002] Minimally invasive transcatheter treatment of cardiovascular diseases has gradually become the main treatment method, such as coronary stents, heart valves, occluders, great vessel stents and other cardiovascular implanted devices, which need to be delivered to the human body through delivery devices The expected ideal position, and the implanted device needs to be fixed after reaching the target position, and the fixation of the heart valve prosthesis is particularly important. In the prior art, the fixation of the aortic valve and the pulmonary valve mainly depends on the radial support force of the valve support, and the clamping parts or protrusions, depressions, etc. are set on the valve support and fixed by using the shape and characteristics of the anatomical structure; the mitral valve The fixation of valves and t...

AI Technical Summary

Problems solved by technology

In this solution, the detachable connection operation between the anchor release device and the fixing unit is relatively complicated, requires high precision, and is difficult to pre-install, and after the sheath is withdrawn, the stress on the detachable connection is large, which is easy to damage the implanted device and anchor release device; before anchoring, the bending of the delivery tube needs to rely on the support structure to fix the corner, otherwise the distal end of the delivery tube is difficult to stick to the fixing unit, and, in the process of sheath retraction and sheath release Because the length of the delivery tube changes, before anchoring, there may be a gap between the distal end of the delivery tube and the fixation unit, which is not firmly attached, which affects the anchoring effect, and the surgical risk is high; for implanted devices that require multi-point fixation , this solution needs to be equipped with multiple delivery tubes at the same time, the structure is complex, and the diameter of the delivery tube is large; after the anchoring operation is completed, re-anchoring cannot be performed, and the operation risk is high

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