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主任提问:呼吸衰竭患者的「氧合指数」是多少?如何计算?
PaO2/FiO2 的参考范围为 350 ~ 500 mmHg(年龄越大,参考值越低)。 Horovitz 等人认为 PaO2/FiO2 ≤ 300 mmHg 意味着存在显著的肺部功能障碍(诊断 I 型呼吸衰竭要求海平面大气压下 PaO2 < 60 mmHg,空气 FiO2 为 21%, PaO2/FiO2 大致计算为 < 300 mmHg),后续柏林定义及 ARDS ...
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