The patients' tracheas will be intubated using a Macintosh laryngoscope with either an appropriately sized left-sided DLT (DLT group)10 or a minimum 7.5-mm internal diameter (ID) ETT for women and 8.0-mm ID ETT for men, which will be connected to a dedicated multiport airway adapter to allow continuous ventilation of the patients during the placement of the bronchial blockers (bronchial blockers groups).