Heart valve repairing device

Abstract

The invention discloses a heart valve repairing device, which comprises a forming ring body and a contraction traction line, and is characterized in that the forming ring body comprises at least two metal strips, end part metal tubes arranged at the end parts of the metal strips in a sleeving manner, and joint part metal tubes arranged between the two adjacent metal strips in a sleeving manner; a first traction hole is formed in one end of the metal strip, and a second traction hole is formed in the connecting part metal pipe. And the contraction traction wire is wound on the first traction hole and the second traction hole so as to connect the metal strip and the connecting part metal tube. The two end metal pipes are connected through a buckle assembly. The contraction traction wire is wound on the first traction hole and the second traction hole to connect the metal strip and the connecting part metal pipe, and the two end metal pipes are connected through the buckle assembly to enable the forming ring body to be connected end to end to form the annular structure, so that compared with a rigid folding type forming ring structure, the conveying diameter is smaller, and the conveying efficiency is improved. The overall strength is slightly lower than that of a rigid folding structure, but the required supporting strength can be met.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a heart valve repair device. Background technique [0002] Mitral valvuloplasty is the treatment of mitral regurgitant heart valve disease by implanting an artificial mitral annuloplasty ring. Prosthetic mitral annuloplasty rings are used as part of mitral annuloplasty to assist in the correction of heart valve defects such as mitral regurgitation. The mitral valve includes the mitral annulus, leaflets, papillary muscles, and chordae. Mitral regurgitation is the backflow of blood from the left ventricle through the mitral valve to the left atrium when the left ventricle contracts. Dilation of the mitral valve annulus impedes the valve's ability to distort the normal shape of the valve orifice. [0003] For the surgical treatment of mitral regurgitation, mitral valvuloplasty has obvious advantages compared with mitral valve replacement in terms of survival rate, val...

AI Technical Summary

Problems solved by technology

Dilation of the mitral valve annulus impedes the valve's ability to distort the normal shape of the valve orifice

The material of the rigid ring is relatively hard, not easy to bend, and cannot achieve coordinated movement with the cardiac cycle

The flexible ring is closer to the physiological activity of the normal mitral valve ring, and has less impact on the left ventricular function, but the support and shaping effect is poor. Mitral regurgitation recurrence is prone to occur after surgery, and the reoperation rate is relatively high.

[0004] Before the implementation of mitral annuloplasty, the forming ring needs to be adjusted in a straight line and loaded into the forming ring loading cavity of the delivery system. The rigid ring is generally loaded into the forming ring loading cavity in a folded structure, but the folded structure The delivery diameter of the rigid ring is relatively large, which requires a higher size of the forming ring loading cavity; while the flexible ring has a smaller delivery diameter, but its supporting and forming effects are poor, and mitral regurgitation recurrence is prone to occur after surgery

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