This trial is prospective randomized trial. The Objects are adult patients who need nasotracheal intubation for surgery. Using computed randomized table, participants are assigned to three groups, McGrath MAC®, Pentax-AWS® and Macintosh direct laryngoscopes.~The intubation will be done by One expert anesthesiologist who have more than 10 years experience.~Investigators compare intubation time, success rate and difficulty between three groups.
A comparison of intubation time, difficulty of intubation in nasotracheal intubation using McGrath MAC®, Pentax-AWS® and Macintosh direct laryngoscopes