Tracheobronchial Parameters.

Values are given as mean ±SD. NS = not significant. AP-mcTD: Anteroposterior Midclavicular tracheal diameter; Tr-mcTD: Transverse Midclavicular tracheal diameter; AP-mTD: Anteroposterior Middle tracheal diameter; Tr-mTD: Transverse Middle tracheal diameter; Pe-LBD: Proximal end Left main bronchus internal diameter; M-LBD: Intermedius Left main bronchus internal diameter; Pe-RBD: Proximal end Right main bronchus internal diameter; M-RBD: Intermedius Right main bronchus internal diameter; RUBD: Right upper bronchus internal diameter; Pe-RMBD: Proximal end Right middle bronchus internal diameter; M-RMBD: Intermedius Right middle bronchus internal diameter; TL: Tracheal length; LBL: Left main bronchus length; RBL: Right main bronchus length; RMBL: Right middle bronchus length; LA: Left bronchial angle; RA: Right bronchial angle; RUA: Right upper bronchial angle. Tracheobronchial Parameters.