We read with interest A. Tulaimat's letter concerning our recent editorial in the European Respiratory Journal [1]. A. Tulaimat makes several insightful comments on problems with criteria used for entering patients into randomised controlled trials of noninvasive ventilation. Among these, he notes that arterial-to-inspired oxygen (P_aO2/F_IO2) ratio varied between 170 and 400 among enrollees [2].

中文翻译：

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PaO2/FIO2 比率：COVID-19 中氧合的错误测量

我们感兴趣地阅读了 A. Tulaimat 关于我们最近在欧洲呼吸杂志[1] 上的社论的信。A. Tulaimat 对用于将患者纳入无创通气随机对照试验的标准问题发表了几条有见地的评论。其中，他指出，参加者的动脉吸氧 ( P _{aO 2} / F _{IO 2} ) 比率在 170 到 400 之间变化 [2]。