Repair device for preventing valve regurgitation

Abstract

The invention relates to the field of medical instruments, in particular to a repair device for preventing valve regurgitation. The device comprises: a mounting bracket; and a single anti-regurgitation leaflet prosthesis for replacing the function of a single autologous leaflet, wherein one end of the single anti-regurgitation leaflet prosthesis is fixed on the mounting bracket. The repair device only replaces a single valve leaflet with a problem, the original functions of the remaining part of the autologous valve leaflet are reserved, meanwhile, the shape of an autologous valve ring is not changed, damage to intracardiac tissue is small, meanwhile, the implantation amount of an implant is small, and irritation is small.

Description

technical field [0001] The present application relates to the field of medical devices, in particular to a repair device for preventing valve regurgitation. Background technique [0002] Tricuspid regurgitation is generally caused by pulmonary hypertension, right ventricle enlargement, and tricuspid annulus dilatation. It is often clinically manifested as the cause of tricuspid regurgitation (left heart failure, pulmonary hypertension, etc.). After tricuspid regurgitation occurs, patients will experience fatigue, ascites, edema, liver pain, indigestion, anorexia and other symptoms of right heart failure. Mild tricuspid regurgitation has no obvious clinical symptoms, but when severe regurgitation requires surgical treatment. [0003] Traditional treatments for mitral and tricuspid valve disease include medical therapy for mild to severe regurgitation and surgical approaches when indicated for surgery. Among them, surgical methods also include valve replacement and valve rep...

AI Technical Summary

Problems solved by technology

In order to anchor the valve prosthesis stably at the target position, at least 3 anchor points are required, and the positions of each anchor point are different, the span is large, and the operation is complicated

When the heart moves, the contraction and expansion of the posterior valve ring are obvious, and the anchoring position is always active. The anchoring is difficult and the distance between the anchoring points is difficult to grasp, and the anchoring effect is not good.

When the prosthetic valve is closed, the upper flaring part used for anchoring is located in the downstream part of the blood flow, and the ventricle part of the prosthetic valve has no force point, and the prosthetic valve is prone to displacement and instability, resulting in prosthetic leaflets and autologous anterior Poor leaflet coaptation, leading to regurgitation

[0006] Patent CN201610921114.9 describes a heart valve prosthesis, including a valve support and a fixing device. The valve support includes a sewing section and an artificial valve. The fixing device includes a fixed support section and an anchor. One end of the fixed support section is anchored Parts are connected on the patient's interventricular septum to support the heart valve prosthesis and limit the axial movement of the heart valve prosthesis, and the cross-sectional area of ​​the valve sewing segment is smaller than the cross-sectional area of ​​the patient's own valve ring; Artificial valves replace all the still functioning valve leaflets, which will greatly change the original hemodynamics, and the impact on cardiac function needs to be further studied

The annulus of tricuspid regurgitation disease is obviously dilated, and the implanted artificial valve has a large stress area, and the anchor bears a large force, which is easy to detach from the interventricular septal tissue.

The treatment principle of this program is to shrink the enlarged tricuspid annulus and increase the apposition area of ​​the native valve leaflets. After shortening the distance, the annulus shape of the original tricuspid valve changes greatly, and the shape becomes more irregular, and the apposition effect of the native valve leaflets will not be very stable; To establish an anchor point, the strength of the tissue is low and it is easy to tear; it is difficult to locate the anchor point in the modified scheme, and it is difficult to locate the ideal position; and this method is complicated to operate, first locate the target position, then the guide wire punctures the tissue or leaflet, and then inserts the The guide wire grabs or releases the spacer, then tightens the anchor point, proceeds to the next anchor point, and finally reduces the distance between the anchor points

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