One possible explanation for tbis finding
could be tbat tbe movement of tbe ETT during controlled
ventilation may lead to irritation of tbe narrowest part z>i
tbe airway, tbe vocal cords, tbus leading to boarseness.
Tbis is more likely to occur wben using an ETT with a
low cuff pressure because tbe tube is probably not fixed
in tbe tracbeal lumen. In tbe present study, all patients