Representative bronchoscopic images of a bronchial blocker and DLT placement.
A.Normal tracheal anatomy with cartilaginous rings anteriorly and membranous trachea posteriorly; this helps define left versus right. A bronchial blocking catheter is seen in the right mainstem bronchus.B.Placement of a left-sided DLT; the upper portion of the endobronchial cuff is evident as well as the orifice of the right upper lobe just below tracheal carina.C.Placement of a right-sided DLT; the upper portion of the endobronchial cuff is evident in the right mainstem bronchus.D.The orifice of the right upper lobe visualized through the slot on the lateral aspect of the bronchial side of a right-sided DLT.