Fig. 4From: Prognostic value of the early lung ultrasound B-line score for postoperative pulmonary insufficiency in patients undergoing thoracic surgery: an observational studyChange in PaO2/FiO2 from 30 min after extubation to postoperative day 3. The blue and red lines indicate PaO2/FiO2 < 300 and ≥ 300 on the third postoperative day, respectivelyBack to article page