The diaphragm thickness will be recorded in time motion (TM) mode. The diaphragm will be outlined using the two clear bright parallel lines of the pleural and peritoneal membranes. Measurements will be averaged out of three or more consecutive breaths on the last valid image recorded at the end of each period (6) .At the conclusion of the surgical procedure and when TOF neuromuscular monitoring shows a minimum of 2 twitches, patients will randomly receive, as described above, either (NEO Group) iv Neostigmine 50 µg kg-1 and atropine 15 µg kg-1 or (SUG group) iv Sugammadex 2 mg kg-1 to reverse residual curarization. Extubation will be performed when all of the following criteria are met: Patient is awake and executes simple commands, shows regular respiratory pattern with a tidal volume of 6-7 mL/kg referred to ideal body weight (IBW) and a TOF ratio ≥0.9. During the period preceding a TOF ratio > 0.9 , bilateral diaphragm ultrasonography evaluating amplitude of excursion and TF will be performed to assess muscle recovery in spontaneous breathing patients. These measurements will be compared with baseline muscle assessment. Three additional diaphragm ultrasound scans will be performed 15 and 30 minutes after discharge from operating theatre. Follow up will be performed to document every adverse event and complication that occurs until discharge from the hospital.