Table 2 Onset and duration of sciatiac nerve blockade

Onset time of sensory block for each dermatome (min)

In CPN distribution

22 (18,23)

18 (14,18)

< 0.001

In SN distribution

20 (18,20)

14 (12,16)

< 0.001

In TN distribution

18 (16,20)

12 (11,16)

< 0.001

Onset time of limb sensory block (min)

22 (20,23)

16 (16,18)

< 0.001

Onset time of motor block (min)

26 (24,28)

22 (20,24)

< 0.001

Analgesia duration (h)

14 (10.5,16)

13 (11,16)

0.62

Resolution of motor block (h)

12 (11,14)

12 (10,14.5)

0.68