Neostigmine arm

Sugammadex arm

In sugammadex group, sugammadex (Bridion, Merck Shart and Dohme (MSD), Oss, the Netherlands) will be administered intravenously in different doses according to the degree of muscle relaxation. Sugammadex 8 mg/kg will be administered if there is no response on post-tetanic count (PTC) stimulus. Sugammadex 4 mg/kg will be administered if PTC is more than 1 or 2. Sugammadex 2 mg/kg will be administered if T2 response appears on train-of-four (TOF) stimulus.

Primary outcome is the proportion of patients who have clinically acceptable surgical condition. The surgeon will evaluate the surgical condition as a surgical rating scale during surgery (extremely poor condition, poor condition, acceptable condition, good condition, optimal condition).