Preclinical study of a self-expanding pulmonary valve for the treatment of pulmonary valve disease  

作　　者：Dajun Kuang Yang Lei Li Yang Yunbing Wang 

机构地区：[1]National Engineering Research Center for Biomaterials,Sichuan University,No 29 Wangjiang Road,Chengdu 610064,China [2]Venus Medtech(Hangzhou)Inc.,88 Jiangling Road,Hangzhou 311053,China

出　　处：《Regenerative Biomaterials》2020年第6期609-618,共10页再生生物材料（英文版）

基　　金：supported by the National Key Research and Development Programs(SQ2019YFC110002).

摘　　要：In the past decade,balloon-expandable percutaneous pulmonary valves have been developed and applied in clinical practice.However,all the existing products of pulmonary artery interventional valves in the market have a straight structure design,and they require a preset support frame and balloon expansion.This shape design of the valve limits the application range.In addition,the age of the population with pulmonary artery disease is generally low,and the existing products cannot meet the needs of anti-calcification properties and valve material durability.In this study,through optimization of the support frame and leaflet design,a self-expanding pulmonary valve product with a double bell-shaped frame was designed to improve the match of the valve and the implantation site.A loading and deployment study showed that the biomaterial of the valve was not damaged after being compressed.Pulsatile flow and fatigue in vitro tests showed that the fabricated pulmonary valve met the hydrodynamic requirements after 2108 accelerated fatigue cycles.The safety and efficacy of the pulmonary valve product were demonstrated in studies of pulmonary valve implantation in 11 pigs.Angiography and echocardiography showed that the pulmonary valves were implanted in a good position,and they had normal closure and acceptable valvular regurgitation.The 180 days’implantation results showed that the calcium content was 0.31-1.39 mg/g in the anti-calcification treatment group,which was significantly lower than that in the control valve without anti-calcification treatment(16.69 mg/g).Our new interventional pulmonary valve product was ready for clinical trials and product registration.

关 键 词：pulmonary valve self-expanding double bell-shaped ANTI-CALCIFICATION PRECLINICAL 

分 类 号：R563[医药卫生—呼吸系统]