Effect of clonidine on the cutaneous silent period during spinal anesthesia

Table 3 Perioperative characteristics of subarachnoid block, duration of perioperative analgesia and amount of nonsteroidal anti-inflammatory drug administration through whole time (over 24 h) - independent t-test (mean ± SD)

	Levobupivacaine group(n = 30)	Levobupivacaine + Clonidine group(n = 30)	P
Regression time of the motor block (Bromage 0) - operated side	162.3 ± 25.6	285.3 ± 55.2	< 0.001
The time of sense regression in S1 dermatome - operated side (pinprick test)	195.0 ± 22.4	326.3 ± 49.4	< 0.001
Duration of analgesia after SAB application	192.3 ± 20.3	364.3 ± 53.3	< 0.001
NSAID (iv.) 1st time (min)	205.3 ± 22.2	377.0 ± 51.6	< 0.001
NSAID (iv.) 2nd time (min)	388.3 ± 38.4	593.8 ± 54.9	< 0.001

iv.: Intravenous; NSAID: Nonsteroidal anti-inflammatory drug; S1: Sacral; SAB: Subarachnoid block.