Stent valve prosthesis and conveying system thereof

A valve prosthesis and delivery system technology, applied in the field of medical devices, can solve problems such as the fatigue resistance of the clamping parts to be discussed, unsatisfactory clamping stability, and defects in the anchoring mechanism, so as to maintain the normal blood supply of the heart and improve The accuracy of positioning and the effect of sufficient positioning time

Active Publication Date: 2019-02-19
NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 ...

Method used

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  • Stent valve prosthesis and conveying system thereof
  • Stent valve prosthesis and conveying system thereof
  • Stent valve prosthesis and conveying system thereof

Examples

Experimental program
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Effect test

specific Embodiment 1

[0070] mitral valve structure 010 such as Figure 1a with Figure 1b As shown, the mitral valve structure 010 is a whole composed of the mitral valve ring 011 , the anterior valve 012 , the posterior valve 013 , the chordae 014 , the papillary muscle 015 , the left atrium 016 and the left ventricle 017 . Among them, the anterior leaflet 012 (A1, A2, A3) and the posterior leaflet 013 (P1, P2, P3) are jointly divided, which are respectively located in the anterolateral part and the posterior middle part. Such as Figure 1c with Figure 1d As shown, the existing products FORTIS of Edwards and TIARA of Neovasc all use the anchoring tab structure 018 fixed on the bracket to approach from the free part of the valve leaflet to the valve annulus, and then from the Figure 1d The position shown clamps the valve leaflet (the main body of the bracket is omitted in the figure), and both the process of inserting the anchoring tab 018 into the bottom of the valve leaflet and the clamping ...

specific Embodiment 2

[0092] In order to improve the effect of positioning and anchoring, such as Figure 16a with Figure 16b As shown, the present invention provides a stent valve prosthesis 200, comprising a stent 210, leaflets (not shown) and a clip 230, the stent 210 includes a support section 211 and a valve sewing section 212, the support section The proximal end of 211 is connected to the distal end of the valve sewing section 212, the valve leaflet is connected to the valve sewing section 212, and the support section 211 is placed above the patient's valve annulus and against Atrial tissue, the stent valve prosthesis 200 includes two clips 230, the clips 230 are wound from shape memory alloy wires, or the clips 230 are cut and shaped from shape memory alloy tubing become.

[0093] The clamping member 230 includes two side wings 231a and 231b, the side wing 231 has a root 232 parallel to the longitudinal axis of the bracket 210 and can rotate around the root 232, the root 232 is glued, we...

specific Embodiment 3

[0106] The stent valve prosthesis 300 of the present invention can also be applied in the field of tricuspid valve replacement. Such as Figure 24a with Figure 24b As shown, the tricuspid valve structure 020 is composed of the tricuspid valve ring 021 , septal valve 022 , anterior valve 023 , posterior valve 024 , chordae 025 , papillary muscle 026 , right atrium 027 and right ventricle 028 as a whole. Such as Figure 24c with Figure 24d As shown, in one embodiment, the stent valve prosthesis 300 includes three clips 330, and each clip 330 includes two side wings 331, and the side wings 331 have a A root 332 parallel to the longitudinal axis, through which the clip 330 is fixedly connected to the outer surface of the distal end portion of the valve sewing segment 312 , and the side wings 331 can rotate around the root 332 . When the clip 310 is released, the root 332 is located at the junction of the anterior valve 023 and the septum 022 of the patient's tricuspid valve,...

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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 ...

Claims

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Application Information

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IPC IPC(8): A61F2/24
CPCA61F2/24A61F2/2409A61F2/2436A61F2210/0014
Inventor 吕世文李毅斌
Owner NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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