Table 1. Patients’ characteristics and causes of acute respiratory distress syndrome.

Sex/age	Underlying lung status before ECMO	Operation	Cause of ARDS	Pre ECMO P/F ratio	ECMO mode
M/24	Primary pulmonary hypertension, destructive lung of left lower lobe	Left lower lobe lobectomy	Blood aspiration due to massive hemoptysis	28	VV, VVA
F/59	Lung cancer, cancer related endobronchial bleeding	Left upper lobe lobectomy & mediastinal node dissection	Blood aspiration due to massive hemoptysis	72	VVA
M/69	Lung cancer, basically normal other lung	Left lobectomy	Post-operative pneumonia	78	VV
M/66	Lung cancer, basically normal other lung	Lobectomy	Post-operative pneumonia	52	VV
M/51	Normal lung	Mediastinal mass excision	Post-operative pneumonia	58	VV
F/30	Normal lung	Caesarean section	Massive transfusion due to bleeding	67	VVA
M/67	Normal lung	Whipple operation	Major surgery	52	VV
F/42	Normal lung	Clavicle fixation	Massive transfusion due to multiple trauma	66	VV
M/62	Lung cancer, interstitial pulmonary fibrosis	Right upper lobe lobectomy	Post-operative bleeding & massive transfusion	69	VV
M/61	Lung cancer, interstitial pulmonary fibrosis	Right lower lobe lobectomy	Post-operative pneumonia	48	VV

ECMO, extracorporeal membrane oxygenation; ARDS, acute respiratory distress syndrome; P/F ratio, PaO₂/FiO₂ ratio; F, female; M, male; VV, veno-venous; VVA, veno-venoarterial.