- For moderate NMB group, no further loading dose of rocuronium was given. An intravenous infusion with rocuronium (0.4-0.6 mg/kg/h) was started at a TOF count of 1 for maintaining moderate NMB (train of four 1-2) during operation. TOF was measured every 5 minutes. In the case of deviations from the target TOF, the pump speed could be increased or decreased or a bolus dose (10 mg) could be given.