Table 2 Block characteristics in the studied groups
Block characteristics | Fentanyl group | Meperidine group | Clonidine group | Analysis of variance or X2 | |
|---|---|---|---|---|---|
F or X2 | P | ||||
(n = 45) | (n = 45) | (n = 45) | |||
Highest level of sensory blockade. T9 | 17 (37.7 %) | 20 (44.4 %) | 19 (42.2 %) | 1.36 | 0.968 |
T8 | 12 (26.6 %) | 14 (31.1 %) | 13 (28.8 %) | ||
T7 | 10 (22.2 %) | 7 (15.5 %) | 8 (17.7 %) | ||
T6 | 6 (13.3 %) | 4 (8.8 %) | 5 (11.1 %) | ||
Time to reach sensory block. (min) | 5.4 ± 1.4 | 5.8 ± 1.2 | 5.5 ± 1.1 | 0.829 | 0.652 |
Time to S max. (min) | 7.5 ± 1.5 | 8.1 ± 1.7 | 7.8 ± 1.4 | 0.755 | 0.495 |
Time to ready for surgery. (min) | 6.4 ± 1.3 | 7.5 ± 1.6 | 6.9 ± 1.5 | 0.582 | 0.675 |
Duration of motor block. (min) | 148 ± 36 | 133.5 ± 40 | 140 ± 35 | 4.95 | 0.074 |
Grade of motor blockade | 10 | 9 | 11 | 0.257 | 0.879 |
BS 2 | 35 | 36 | 34 | ||
BS 3 | |||||
Time to 1st analgesic requirement. (min) | 197 ± 56 | 318 ± 72 | 155 ± 42 | 150.48 | 0.001 |