This is a prospective, randomized, single-blinded controlled trial designed to compare CT-guided versus conventional methods for selecting double-lumen tube (DLT) size in patients undergoing thoracic surgery requiring one-lung ventilatio
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Successful selection of the correct DLT size on the first attempt (defined as optimal position and lung isolation without the need for tube exchange) using fiberoptic scope
Timeframe: During the intraoperative period (at first attempt of double-lumen tube placement)