Prosthesis used for preventing valve reflux

Abstract

The invention relates to a prosthesis (100) used for preventing valve reflux. The prosthesis comprises a fixing unit (110), a connecting piece (120) and a closing assisting piece (130). The fixing unit (110) comprises a fixing piece (111) and an anchoring piece (112). The connecting piece (120) is flexible. The far end portion of the connecting piece (120) is connected with the near end portion of the fixing piece (110). The near end portion of the connecting piece (120) is connected with the far end portion of the closing assisting piece (130). The fixing piece (111) is fixed to the atrium wall or the valve ring of a patient through the anchoring piece (112). The width of the unfolded fixing piece (111) is smaller than two thirds the perimeter of the valve tissue ring. The closing assisting piece (130) is located between the autologous valve leaflets of the patient when the closing assisting piece (130) is in the free state. The maximum width of the closing assisting piece (130) is smaller than the maximum width of a single unfolded autologous valve leaflet. The near end of the anchoring piece (112) is provided with an anti-disengagement end (1120). The prosthesis is adjustable in position, accurate in positioning, capable of being firmly anchored and not prone to adhering to tissue near the valve ring of the patient.

Description

Technical field: [0001] The invention belongs to the field of medical devices, and in particular relates to a prosthesis for preventing valvular regurgitation. Background technique: [0002] The mitral valve is located at the left atrioventricular orifice and consists of five parts: the valve annulus, valve leaflets, chordae, papillary muscles, and junctional junction. Its anatomically accurate name is mitral apparatus (mitral apparatus) or mitral valve compound body (mitral complex). [0003] The tricuspid valve is located at the right atrioventricular orifice and has three approximately triangular sail-shaped valves. The bottom of the valve is attached to the fibrous annulus of the atrioventricular orifice. Functionally, the fibrous annulus, valves, chordae and papillary muscles can be seen. It is a tricuspid valve. Valve complex (tricuspid valvar complex). [0004] Mitral regurgitation (mitral regurgitation) can be divided into the following two types: 1. Rheumatic card...

AI Technical Summary

Problems solved by technology

This kind of system is only suitable for the overall repair of the prolapse of the anterior or posterior mitral valve, and the prolapse repair of the whole leaflet of the partial tricuspid valve due to the limitation of the length of the upper part of the native valve annulus, and it shows that the The length of the lower part of the joint body covers at least most of the leaflets, and the joint part has specific arc requirements

This technique cannot adapt to the repair of a small part of the valve prolapse or a small valve such as the aortic valve. When repairing the insufficiency of the valve, the rest of the normal valve is sacrificed at the same time.

To sum up, its disadvantages include: first, it is clearly described that the length of the upper part of the joint body is equal to the distance between the first and second commissures, so it is only suitable for the overall repair of the leaflets, and the repair area includes both Leaf prolapse also includes the normal part of the leaflet; second, the length of the valve annulus varies greatly from person to person, and the distance between the first and second commissures before the actual operation is unpredictable The design is precisely matched; third, the shape of the joint body is conical, trying to match the conical shape of the human valve leaflet, and it is also difficult to completely match due to human differences; fourth, the design is not suitable for combined valve leaflet prolapse repair

The main reason is that the mitral valve ring and tricuspid valve ring have special physiological structures, and there is a complex physiological environment below the valve ring, making it very difficult to accurately position and fix the product

In addition, the degree and location of valve prolapse are different. For example, some patients have regurgitation caused by anterior valve prolapse, and some patients have regurgitation caused by combined valve disease. It also interferes with the physiological structure of the remaining normal mitral valve, and the adaptability of the lesion is insufficient

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