A kind of manufacturing method of artificial heart valve stent

Abstract

The invention discloses a method for manufacturing an artificial heart valve stent, which solves the problem of manufacturing errors in the mechanical manufacturing of the valve stent in the prior art, and has the beneficial effects of convenient processing and accurate manufacturing of the valve stent. The specific solutions are as follows: 1. A method for manufacturing an artificial heart valve stent, comprising selecting a valve prototype reference plane, and modeling based on the selected valve prototype reference plane; creating a model according to the valve prototype reference plane according to the valve leaflet distribution of the artificial heart valve stent, and using half of the valve prototype reference plane to create a model. The space intersection line of the inverted conical surface and the rotating surface whose apex angle is the set angle is the reference valve stent curve, and the single leaflet shape is obtained by combining the height of the leaflet, the free edge of the leaflet and the plane angle of the joint; Copy, make each valve leaflet evenly distributed at a set angle, complete the modeling of the artificial heart valve stent, convert the built model into the file required by the printer, and input the file into the printer; print through the printer.

Description

technical field [0001] The invention relates to the field of heart valves, in particular to a manufacturing method of an artificial heart valve stent. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, the incidence of valvular heart disease in my country is about 2.5%-3.2%. According to an estimate of 1.3 billion people, there are about 4 million patients with valvular heart disease, which currently ranks first in human heart surgery. Among the current treatment methods for heart valve disease, the only radical method is artificial heart valve replacement surgery. That is, it can be used for a longer period of time, but the thromboembolism rate is high, causing complications related to anticoagulation. The biological valve is made of all or partial biological materials. It usually has good hemodynamic properties, that is, the f...

AI Technical Summary

Problems solved by technology

Among the current treatment methods for heart valve diseases, the only radical method is artificial heart valve replacement surgery. The mechanical valve is made of a variety of artificial materials and implanted in the heart to replace the heart valve to achieve the one-way blood flow function. It has significant advantages. That is, it can be used for a longer period of time, but the rate of thrombus embolism is higher, causing complications related to anticoagulation

Biological valves are made entirely or partially of biological materials, and usually have good hemodynamic properties, that is, the central flow characteristics of the fluid in the flow channel of the valve orifice, and have good biocompatibility, but are prone to calcification and have a short service life.

[0004] All kinds of artificial heart valves currently used still need further research and development. The applicant disclosed an artificial heart valve stent in Chinese patent 200820173458.7, but did not give a specific processing method

[0005] The inventors found that the existing artificial heart valve stent material is usually chromium-nickel-titanium alloy, and the biocompatibility of the alloy stent is not good enough; further, because the valve stent has a small diameter of 0.5 mm and a special shape, it needs to be divided into multiple parts for processing and forming , the molding process is more complicated, a series of molds need to be designed, the shape of the mold is not accurate enough, and the parameters need to be constantly corrected

[0006] In addition, the existing artificial heart valve stents are all mechanically processed. The machining method is more traditional, with more processing steps and more errors. Furthermore, the alloy valve stents processed by machining have a certain amount of rebound Failure to strictly guarantee the required shape parameters will affect the shape of the leaflets, which may lead to problems such as abnormal opening and closing of the sewn valve

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