Lidocaine Serum (ng/ml) Group Independent Sample t test Lidocaine Infusion (n=20) Control (n=20) Mean ± SD 1901.7 ± 169.6 171.9 ± 75.8 p=0.000 Minimal/Maximal 1776 – 2514 68 – 388

Table 2: The comparison of serum lidocaine levels between NaCl 0.9% infusion groups (control) and NaCl 0.9%+Lidocaine group.