A Double-blind, Randomized, Parallel Design Study to Compare the Effectiveness of Sugammadex Versus Neostigmine in Improving Surgical Condition in Subjects Undergoing Laryngeal Microsurgery

Investigators hypothesized that the surgical condition will be improved with the use of sugammadex in patients undergoing laryngeal microsurgery. Investigators will compare the effect of sugammadex and neostigmine on the surgical condition during laryngeal microsurgery.

Inclusion Criteria:

• adult patients of age over 20 years
• scheduled for laryngeal microsurgery under general anesthesia

Exclusion Criteria:

• anticipated difficult intubation, cervical spine disease, neuromuscular disease, acute or chronic renal failure, liver cirrhosis or liver failure
• history of allergy to nondepolarizing muscle relaxant
• history of malignant hyperthermia
• pregnant woman
• body mass index over 35 kg/m2