TABLE 1.

Onset of action for local anesthetic

Anesthetic or mixture	Onset of effect, s
	Mean ± SD	Median (Min–Max)
0.25% bupivacaine	19±41	0 (0–180)
1% lidocaine	29±49	0 (0–180)
0.125% bupivacaine and 0.5% lidocaine	26±46	0 (0–120)
0.25% bupivacaine and 1% lidocaine	12±30	0 (0–120)

P=0.891. Max Maximum; Min Minimum