Cahyadi A., Department of Anestesiology, Univesitas Padjajaran, Hasan Sadikin General Hospital, Bandung, Indonesia, Department of Anesthesiology and Intensive Care, Faculty of Medicine, University of Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Firdaus R., Department of Anesthesiology and Intensive Care, Faculty of Medicine, University of Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Angkasa H., Department of Anesthesiology and Intensive Care, Faculty of Medicine, University of Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia