To observe the effect of learning endotracheal intubation guided by Dispo-scope in the operation of unilateral thyroidectomy, and to master the skills of Disposcope.

Eighty-five patients with unilateral thyroid resection were randomly treated with using the Disposcope and Macintosh guided tracheal intubation. The successful rate of intubation, the time of intubation and the cy-clic fluctuation during intubation were performed.

The clear vision of trachea ring under glottis was a unique advantage of Disposcope. For the first time to study and using Disposcope guided intubation, the success rate was lower than that of Macintosh (48.1% vs 93.5%), the intubation time was significantly prolonged [(58.9±37.8) s vs (28.5±11.2) s] (P < 0.01), but there was no significant difference in cyclic fluc-tuations.

Disposcope is helpful for the treatment of patients with difficult airway in thyroid surgery, and reduce arytenoid dislocation and hoarseness caused by blind intubation. For beginners, both hands to lift the mandible by assistant can effectively expand the throat cavity, and easier to expose glottis for intubation.