Endobronchial intubation technique and airway morbidity.

airway morbidity Editor—We read the interesting article by Seo and colleagues about the study comparing two techniques of double-lumen endobronchial intubation. We have a few queries. First, the authors have not mentioned if any lubrication or softening technique was used to prepare the double-lumen tube (DLT) before placement to prevent airway morbidity. Secondly, the authors have not mentioned whether there was any correlation between Cormack and Lehane’s grading and resistance to pass the DLT. Thirdly, the authors discussed a better antero-posterior alignment at the level of vocal cords in the group 180 leading to decreased resistance to placement of DLT and subsequent less vocal cord morbidity, but what could be the possible reason for more sore throat in the group 90 in comparison with the group 180?