Fig. 3
Five sub-regions of tracheal carina. A the entrance of right main bronchus. B the entrance of left main bronchus. C the left main bronchus. D the main carina. E the right main bronchus
Fig. 3 | BMC Anesthesiology
Five sub-regions of tracheal carina. A the entrance of right main bronchus. B the entrance of left main bronchus. C the left main bronchus. D the main carina. E the right main bronchus