By vgreene, 22 March, 2020 Use PaO2/FiO2 ratio to determine ARDS severity (in mmHg, modify for elevated altitude)1,2
By vgreene, 22 March, 2020 Hypoxemia mod/severe. PaO2/FiO2 ratio ≤300 mmHg on PEEP (or CPAP2) ≥5 cmH2O.1 If PaO2 not available: SpO2/FiO2 ≤315 suggests ARDS (including in non-ventilated pt), per WHO2
By vgreene, 22 March, 2020 Resp failure not fully explained by cardiac failure or fluid overload (if no ARDS risk, objectively exclude hydrostatic edema, eg, w/ echo)
By vgreene, 22 March, 2020 BL opacities on chest imaging (CXR, CT) not fully explained by effusions, nodules, lobe/lung collapse
By vgreene, 22 March, 2020 Hypoxemia mod/severe. PaO2/FiO2 ratio ≤300 mmHg on PEEP (or CPAP2) ≥5cmH2O.1 If PaO2 not available: SpO2/FiO2 ≤315 suggests ARDS (including in non-ventilated pt), per WHO2
By vgreene, 22 March, 2020 Resp failure not fully explained by cardiac failure or fluid overload (if no ARDS risk, objectively exclude hydrostatic edema, eg, w/ echo)