Fig. 1.

Lag time (LT) and onset time (OT). LT and OT were significantly shorter in group M than in group C. LT is the time in seconds from the start of cisatracurium injection until the first change of single twitch response. OT is the time until 95% depression of the single twitch. In the MgSO₄ group (group M), patients received MgSO₄ 30 mg/kg in 0.9% normal saline (total volume = 100 ml) intravenously. In the control group (group C), patients received the same volume of 0.9% normal saline alone. White symbol, magnesium; Grey symbol with polka dots, control. The box-and-whisker plots show 10th and 90th percentiles, lower and upper quartiles, medians (horizontal bars) and means (circles). ^*P < 0.05 compared with Group C.