Fig. 2From: Individualized rotation of left double lumen endobronchial tube to improve placement success rate: a randomized controlled trialDetermination of individualized degree for left DLT rotation in 2 representative cases. Panels a/b: a 74-year-old man; panels c/d: a 62-year-old woman. Green line: median sagittal reference line between sternum and vertebral body; red line was from the centre of the carina (A) to the centre of the left mainstem bronchi (B)Back to article page