Table 8 Duration of surgery

Surgery duration(min)

41.26 ± 3.57

40.59 ± 3.72

0.016

Peak sensory level

T4 (T4-T5)

T4 (T4-T5)

0.277

Time to reach peak sensory level (min)

6.5 ± 0.61

6.93 ± 0.32

0.67

Time to 2 segment regression

76.68 ± 4.62

96.71 ± 3.77

< 0. 001

Duration of sensory block

124.50 ± 6.72

161.83 ± 7.00

< 0. 001

Onset of motor block (time to reach Bromage 4) (min)

6.44 ± 1

6.56 ± 0.38

0.526

Duration of motor block

182.27 ± 10.1

178.89 ± 4.5

0.1

Time to 1st rescue analgesia

174.26 ± 12.1

196.69 ± 5.4

< 0.001