School of Mechanical Engineering, Shiraz University, Shiraz, Iran.
J Cataract Refract Surg. 2011 Aug;37(8):1530-8. doi: 10.1016/j.jcrs.2011.02.026.
To provide the details of the flow field in the anterior chamber during irrigation/aspiration (I/A) in phacoemulsification using computational fluid-dynamics methods.
School of Mechanical Engineering, Shiraz University, Dr. Khodadoust Eye Hospital, Shiraz, Iran, and Clarkson University, Potsdam, New York, USA.
Theoretical study.
A 3-dimensional model for the irrigating cannula, anterior chamber, capsular bag, and aspiration cannula was developed. The corresponding mathematic equations were solved numerically, and the details of the flow field were evaluated. The simulation was performed for coaxial and bimanual I/A systems with various flow rates. The pressure flow rate curve was evaluated, and the possibility of an unstable anterior chamber in different cases was assessed.
The effects of flow turbulence on the corneal endothelium were lower for the coaxial handpiece. That is, inner placement of irrigation cannula tip lowered the effect of turbulence on the cornea.
Assessment of the fluid dynamics of I/A using computational fluid dynamics provided details that cannot be obtained with the available experimental and analytic methods.
使用计算流体动力学方法，提供在超声乳化手术中灌洗/抽吸（I/A）过程前房内流场的细节。
伊朗设拉子大学机械工程学院、Khodadoust 眼科医院，以及美国纽约州波茨坦克拉克森大学。
理论研究。
为灌洗套管、前房、囊袋和抽吸套管开发了一个三维模型。通过数值求解相应的数学方程，评估了流场的细节。模拟了具有不同流速的同轴和双手 I/A 系统。评估了压力流速曲线，并评估了不同情况下前房不稳定的可能性。
对于同轴手柄，流动湍流对角膜内皮的影响较小。也就是说，将灌洗套管尖端置于内部，降低了湍流对角膜的影响。
使用计算流体动力学评估 I/A 的流体动力学提供了可用的实验和分析方法无法获得的细节。
