目的用数值模拟的方法获得加压供氧面罩无余压状态下呼气活门的呼气阻力。

Objective To obtain the expiratory resistance in pressure oxygen mask under no overpressure condition with numerical simulation method.

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以年龄、身高、FVC为自变量，在IBM-PC／XT计算机上用多元逐步回归法建立呼气和吸气阻力的回归方程。

The regression equations of expiratory and inspiratory resistances were built with multiple stepwise regression analysis on the IBM PC/XT computer with age, height and FVC as independent variables.

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