In this assessor-blinded study , 48 patients undergoing elective laparoscopic cholecystectomy were administered rocuronium for neuromuscular blockade and randomized to either deep neuromuscular blockade ( rocuronium bolus plus infusion maintaining a posttetanic count 0-1 ) or moderate neuromuscular blockade ( rocuronium repeat bolus only for inadequate surgical conditions with spontaneous recovery of neuromuscular function ) .