Adjustable artificial heart valve shaping ring

Abstract

The invention relates to an adjustable artificial heart valve shaping ring, which is externally coated with biocompatible medical cloth and comprises multiple sewing units, multiple springs arranged between adjacent sewing units and a wire for connecting the sewing units and springs, wherein the sewing units are provided with sewing holes for sewing the shaping ring to heart valves. The shaping ring is an open type ring body with a fixed end and a free end; one end of the wire is fixedly connected with the sewing units located at the fixed end; the other end of the wire passes through the sewing units and springs and comes out from the free end of the ring body and extends outwards; except the sewing units connected with the fixed end of the ring body, one or more sewing units of the ringbody can slide relatively to the wire, so that the sewing units can be pruned away or dismounted to obtain needed ring body length; and after implant sewing is finished, the ring body length can be subjected to fine adjustment by adjusting the wire inside the ring body, thereby realizing good shaping effect and further improving post-operation heart functions.

Description

technical field [0001] The invention relates to a medical device, in particular to an artificial heart valve forming ring with adjustable length used in heart valve forming. Background technique [0002] Acquired heart valve disease is still the most common with rheumatic heart valve disease. In addition, with the prolongation of human life span, the incidence of chronic valvular disease caused by degeneration is gradually increasing. Ischemic heart disease, bacterial endocarditis and cardiac trauma can all lead to valvular insufficiency. For this kind of heart valve disease, there was once enthusiasm for heart valve replacement surgery. However, since the artificial heart valve has not yet reached the ideal level, it is generally advocated to try to retain the valve that can restore function through plastic surgery. [0003] For example, for patients with valvular insufficiency whose main lesion is enlarged mitral valve or tricuspid valve ring, an annuloplasty ring for cor...

AI Technical Summary

Problems solved by technology

However, the soft ring has the disadvantage of inaccurate forming

For example, the Chinese patent application number is CN03242355.1, which discloses a mitral valve annulus, which is a soft ring body and has good compliance, but its supporting and shaping effects are slightly poor, especially in the correction of severely deformed valve annulus. its poor support and shaping effect can lead to poor valve closure

[0007] Recently, a forming ring that is partly segmented rigid unit and overall bendable has appeared. For example, the US patent application number is US20090210051, which discloses a general forming system. The forming ring has good compliance as a whole, and To a certain extent, it overcomes the disadvantage of inaccurate forming of the soft ring, but it has a common disadvantage with the two forming rings mentioned above, that is, the length of the ring body cannot be adjusted after implantation and suturing, and if the residual reflux is too large , sutures need to be removed and sutured again, and valve replacement surgery may even be required, resulting in prolonged operation time and increased operation cost

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