The proposed study will be a prospective, double-blind, single center randomized study performed in 60 patients with ASA physical status I-II, between 18-80 years old, undergoing dNMB with rocuronium during ear nose and throat (ENT) surgery. Randomization will be performed using a table created from the website www.randomization.com, and patients will be divided equally into two groups: Treatment with Sugammadex (SUG group) or treatment with Neostigmine (NEO group). Exclusion criteria will include: A history of hepatic or renal disease, chron-ic or acute alcoholism, allergy or hypersensitivity to Sugammadex and/or atropine or Neostigmine, current medications with CNS effects, a history of neurologic disease, diaphragmatic palsy, pregnancy or nursing arrhythmias. Continuous neuromuscular monitoring will be performed using TOF ratios obtained from ad-ductor pollicis muscle. At the conclusion of the surgical procedure, patients will receive either Neostigmine (NEO group) or Sugammadex (SUG group) for NMB reversal. The physician who will administer the study drugs will insure that is per-formed on an open-label (non-blinded) basis. All patients showing a TOF ratio ≥0.9 will be extubated. Diaphragmatic function (assessed by ultrasonographic evaluation of the TF and amplitude of excursion) will be evaluated in each subject at the following time points: