Fig. 4From: Pulmonary ultrasound and pulse oximetry versus chest radiography and arterial blood gas analysis for the diagnosis of acute respiratory distress syndrome: a pilot studyCorrelation between SpO2/FiO2 and PaO2/FiO2 when SpO2 ≤ 97 %. FiO2 fraction of inspired oxygen, PaO2 partial pressure of oxygen, SpO2 pulse oximetric oxygen saturationBack to article page