Ultrasound-guided double-lumen tube size selection improves intubation success and postoperative airway outcomes in thoracic surgery: a randomized controlled study.

Background: Appropriate double-lumen tube (DLT) size selection is crucial for safe and effective one-lung ventilation in thoracic surgery. Conventional selection based on sex and height does not account for individual airway variability. This study evaluated whether ultrasound-guided DLT size selection improves intubation success and postoperative airway outcomes. Methods: In this prospective randomized controlled study, 70 patients undergoing thoracic surgery who required one-lung ventilation were assigned to either a conventional group (DLT size based on sex and height) or an ultrasound group (DLT size based on tracheal diameter measured by ultrasound at the suprasternal notch). The primary outcome was the incidence of postoperative sore throat at 24 h. Secondary outcomes included postoperative cough, first-attempt intubation success, number of attempts, surgeon-rated lung collapse satisfaction, and intraoperative respiratory parameters. Results: Postoperative sore throat was significantly lower in the ultrasound group compared to the conventional group (8.6% vs. 37.1%, Conclusion: Ultrasound-guided DLT size selection improves intubation success, reduces postoperative airway complications, and enhances ventilatory parameters. This approach may provide a simple and effective method for optimizing airway management in thoracic surgery.