case_images: PMC8367080_01
case_images: A preoperative chest computed tomography showing a tracheal bronchus originating 1.9 cm above the tracheal carina. The diameter of the orifice of the tracheal bronchus was measured as 1.4 cm.
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case_images: TrB could be identified in the tracheal wall on the right side, approximately 1.9 cm above the carina (Figure 1).
case_images: Bronchoscopy view via the tracheal lumen of the double-lumen tube. The orifice of the tracheal bronchus (TrB) was partially obstructed by the tracheal lumen.
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case_images: When the bronchoscope was inserted into the tracheal lumen of the DLT, to the right of the tracheal carina a ridge and a partially obstructed orifice could be seen in the bottom right of the monitor of the bronchoscopy system (Figure 2). The DLT was located to the left of tracheal carina; however, there was a slight herniation of the bronchial cuff of the DLT out of the LMB, which is not shown clearly in Figure 2.
case_images: In the bronchoscopy view through the tracheal lumen, the bronchial segment of the Human-Broncho was visible in the left visual field, and the bronchial cuff was well positioned without herniation. Relative to the carina, the first orifice was the bronchus intermedius (BI) and the second orifice was the tracheal bronchus (TrB).
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case_images: TrB orifice was not obstructed by the tracheal lumen (Figure 3). The patient's vital signs and respiratory parameters were unremarkable without any air leakage during clamping of the connector for the non-dependent lung.