Artificial heart valve and its stent

Abstract

Disclosed is an artificial heart valve and valve scaffold thereof (10), wherein the valve scaffold (10) is an elastic scaffold capable of shrinking axially and being hollow shaped, and a U-shaped opening (30) is arranged at the position of the valve scaffold (10) corresponding to a valve leaflet. By setting the hollow shape and having the U-shaped opening (30) on the valve scaffold (10), the metal structure of the whole heart valve is decreased, which benefits the loading and recovering of the intervention and implantation, and reduces rejection by the human body of the implant.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an artificial heart valve and a valve support thereof. Background technique [0002] The etiology of heart valve disease can be divided into congenital and acquired two categories. Congenital valvular heart disease occurs when the valves are underdeveloped or underdeveloped at birth. For example, bivalvular aortic valve malformation can cause aortic valve stenosis or insufficiency. If the aortic valve is stenotic or insufficient, it will seriously affect the hemodynamic changes, resulting in progressive valve function decline, and finally lead to heart failure and death. The general etiology of acquired valvular heart disease can be divided into infection, degeneration, rheumatic immune changes or other reasons. Infection means that bacteria reach the inside of the heart through the blood and invade the valve; degeneration means that the valve will gradually degenerate with age,...

AI Technical Summary

Problems solved by technology

Since all current bioprosthetic valve paravalvular structures are steel structures, and the models of artificial valves are limited, they cannot fully meet the needs of valves of different age groups, different weights and different pathological forms.

In the case of incomplete matching, doctors often choose an artificial valve that is slightly smaller than the paravalvular valve. The problem is that the suture and ligation are easy to tear, the fixation is unstable, and near-term and long-term paravalvular leakage is also prone to occur.

If the selected model is too large, the rigid snap-in will easily cause tearing and damage to the heart tissue

Therefore, in this case, annulus expansion must be performed, which undoubtedly increases the risk of surgery.

Especially for children or adolescents, due to the small valve ring, a small-sized bioprosthetic valve is used during surgery, but as the age and weight increase, the valve with a fixed size will not be able to further meet the hemodynamic needs, so regular valve replacement is required , to replace a larger biological valve, which not only increases the cost of the operation, but also increases the pain and risk of the operation;

[0006] (2) Difficulty in surgical suturing

But so far, there are more problems in valve replacement with minimally invasive interventional devices: (1) If the valve is positioned poorly, it will block the coronary artery opening of the heart and cause acute myocardial infarction; (2) After the valve is released, If it is not fixed, it will fall off directly and slide into the ascending aorta, causing obstruction of the ascending aorta and its corresponding great vessel bifurcation

Moreover, the above-mentioned problems may lead to serious complications such as death, stroke, and organ failure. The risks are still difficult to control. Once the risks occur, they cannot be compensated.

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