Stent valve prosthesis and conveying system thereof

Abstract

The invention relates to a stent valve prosthesis and a conveying system thereof. The stent valve prosthesis comprises a stent, valve leaflets and clamping pieces; the stent comprises a support section and a valve leaflet sewing section, the near end of the support section is connected with the far end of the valve leaflet sewing section, the valve leaflets are connected to the valve leaflet sewing section, the support section is placed on the valve leaflets of a patient and abuts against the atrial tissue after being released, and each clamping piece comprises one or multiple side wings, wherein one end of the clamping piece is fixedly connected to the outer surfaces of the valve leaflets, and the clamping piece has three forms from compression to complete releasing in sequence, the firstform is that the side wings are compressed in a control device, the second form is that the side wings stretch in the radial direction of the valve leaflets, penetrate through the valve leaflet junction of adjacent tissues and reach the portion between the valve leaflets and the heart wall, and the third form is that the side wings stretch in the circumferential direction of the valve leaflets and fit the outer surface of the valve leaflet sewing section, after releasing is completed, the tissue valve leaflets of the patient and the adjacent chordae tendineae are clamped between the side wings and the valve leaflet sewing section, the valve leaflet stent anchoring fastness is improved conveniently, and the operative successful rate is increased.

Description

Technical field: [0001] The invention belongs to the field of medical equipment, and in particular relates to a stent valve prosthesis and a delivery system thereof. Background technique: [0002] The mitral valve structure consists of the mitral annulus, anterior valve, posterior valve, chordae, papillary muscles, left atrium and left ventricle. The anterior leaflet and the posterior leaflet are jointly divided, which are located in the anterolateral part and the posterior middle part, respectively. The chordae from the bilateral papillary muscles are inserted into the valve leaflets. According to the different insertion sites, the chordae are divided into three types as a whole: commissural tendon, anterior lobe tendon, and posterior lobe tendon. The commissure tendon, as its name implies, inserts into the commissure area of ​​the valve. Usually a single tendon originating from the papillary muscle fanned out and inserted into the commissure. The tendon of the anterior ...

AI Technical Summary

Problems solved by technology

There are three problems with this design. One is that the bracket and the clamp are cut in one piece. The clamping capacity of the clamp is greatly affected by the wall thickness of the pipe, and the wall thickness also affects the bracket. When the support force of the bracket is too large, it will cause Compressing the tissues near the mitral valve, such as the normal work of the aortic valve, it is difficult for the designer to balance the supporting force of the stent while pursuing a larger clamping force for the clamping part; success, the fatigue resistance of the clip is also open to question; third, the clip can only cover and clamp from the area of ​​the valve leaflet that is relatively free of chordal tendons, and its clamping stability is not ideal; fourth, the same clip The holder can only hold a single leaflet, and regurgitation between the leaflets cannot be avoided

To sum up, although the technologies described above have certain effects in valve repair, the existing products have more or less defects in the design of the anchoring mechanism

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