ABSTRACT
A 29 years old man was scheduled for carinal resection & tracheobronehial reconstruction under the diagnosis of malignant tumor in the carina. 1 ml of morphine-scopolamine was given intramusculary for premedication. After induction with pentothal-Na and succinylcholine, anesthesia was maintained with halothane, N2O, and flaxedil (Gallamine). Radial artery cannula was inserted for blood gas analyze sampling, and EKG was monitored continuously. Tumor mass was infiltrated from carina to right upper lobe opening and right lower lobe had severe bronchiectatic change. Right pneumonectomy, resection of carina and end to end anastomosis of trachea and left bronchus were performed without any trouble. During this procedure, anesthesia had been continued with left bronchial tube which was intubated through operating field. Left bronchial ventilation had increased resistance, elevated PCO2, and lowered pH & PO2. Partial ohstruction of left upper bronchial opening was suspected during this left bronchial ventilation due to deep bronchial intubation.