新型后置式青光眼引流阀的结构设计与有限元分析

Structural Design and Finite Element Analysis of New Type Posterior Integral Glaucoma Valve

难治性青光眼的治疗是眼科临床上的难题,针对前房不能植入引流装置的难治性青光眼患者,提出用于玻璃体腔植入的新型后置式青光眼引流阀的设计方案,通过Abaqus软件建立阀门模型,对阀片的刚度及预加载荷进行有限元分析。结果发现,新型后置式青光眼引流阀阀片的启闭是由阀片前后的压力差自动控制的,阀的开口及流量会随眼压的升高而动态加大,并最终达到稳态的设定理想眼压值。

The treatment of refractory Glaucoma is a difficult problem in clinical ophthalmology. For refractory glaucoma patients with hyphema, shallow anterior chamber, anterior conglutination of peripheral chamber angle, corneal endothelium dystrophy or decompensated, at present, there is no effective treatment. In order to solve this problem, a new type posterior integral glaucoma valve with IOP control device was designed using medical titanium alloy, and the valve model was established by Abaqus software, and the stiffness and preload of the valve were analyzed by finite element method. The results showed that the opening and closing of the valve were controlled automatically by the pressure difference between the front and back of the valve, and the opening and flow rate of the valve increase dynamically with the increase of intraocular pressure, and finally reached the set ideal IOP value of steady state.