Valvular prosthetic replacement device with buffer action and stent

Abstract

The invention discloses a valvular prosthetic replacement device with a buffer action and a stent. The stent comprises an aorta stent, a valve stent and a flowing channel stent. The stent is provided with a transition section stent and has a mesh-shaped cylindrical structure formed by sequentially connecting the aorta stent, the transition section stent, the valve stent and the flowing channel stent. The top edge of the aorta stent is provided with at least two fixing lugs. The top edges of the fixing lugs are different from each other in height. A transition section is arranged between the valvular prosthetic replacement device and the stent of the invention and can have a buffer action, protect the valve stent and an internal three-leafvalve and ensure seal performance for long-term use. The valvular prosthetic replacement device of the invention has good positioning effect, not only reduces the difficulty of surgery but also realizes recycling.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an artificial valve replacement device. Background technique [0002] When the patient's own heart valve is mutated due to congenital or acquired diseases, causing the valve to fail to open and close normally, it will affect healthy life and even life. The variation of the heart valve can be divided into insufficiency and insufficiency, both of which can cause increased heart load. Whether the heart can still work normally under this load is the main basis for deciding whether the human heart valve should be replaced. [0003] When the patient needs to replace the valve, the existing method is to use surgery to replace the valve. The doctor will open the patient's chest and stop the heart, and connect it to the extracorporeal cardiopulmonary circulation system. Then open the patient's heart to remove the diseased heart valve, then suture the artificial replacement va...

AI Technical Summary

Problems solved by technology

[0008] However, the delivery device in the prior art only needs to rely on the guide head to contact the inner wall of the blood vessel when it is inserted into the blood vessel of the human body, and the turning is realized under the obstruction of the inner wall of the blood vessel, but this may cause damage to the inner wall of the blood vessel or organ. scuffed or damaged

Not only that, after the artificial valve replacement device is released, because the artificial valve replacement device will expand under the action of body temperature, once it is found to be in place or the position is deviated, it cannot be dealt with, and it is difficult to achieve position adjustment or second place. This not only requires extremely high control precision during surgery, but also has certain risks.

[0009] In the prior art, after the artificial valve replacement device is placed in the heart, the aortic stent 1 is located above the annulus of the tricuspid valve, while the valve stent 2 is basically just at the position of the annulus of the tricuspid valve, and the outflow tract stent 3 is located on the tricuspid valve annulus. Below the annulus, the tri-leaflet valve opens when blood flows upward, and the tri-leaf valve closes when blood flows downward. Due to the effect of blood pressure, the aortic stent 1 will be compressed and deformed to further expand. Because the aortic stent 1 and valve stent 2 are One-piece structure, the expansion of the aortic stent 1 will lead to the deformation of the valve stent 2 to a certain extent, and the tri-leaflet valve is sewn in the valve stent 2, frequent deformation of the valve stent 2 will cause the tri-leaflet valve to loosen or even deform , resulting in poor sealing when it is closed, and part of the blood backflow, which further affects the burden on the patient's heart

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