Able to use in adults and children too small to fit a double-lumen tube

Difficult airway

If double-lumen tube contraindicated

Placed inside the ETT

No need to change ETT in the case of postoperative mechanical ventilation

Lobar isolation

Unable to suction efficiently

Need to be positioned via fiberoptic bronchoscopy

Difficult for right mainstem position and RUL isolation, when the takeoff is too close to the carina

Tracheal occlusion if proximal dislodgment

Cross ventilation if the cuff is not completely inflated

Possible stapling in the stump if not retracted at the appropriate time