Table 2.
Characteristics of spinal anesthesia
| 7.5 mg (n = 20) | 9.0 mg (n = 20) | 10.5 mg (n = 20) | 12.0 mg (n = 20) | |
|---|---|---|---|---|
| Sensory block (to pinprick) | ||||
| Highest level of block | T7 (T4-10) | T5 (T3-7)* | T5 (T3-8)* | T5 (T3-8)* |
| Onset time to T10 (min) | 2.5 (1-5) | 2.5 (1-5) | 2.5 (2-5) | 2.5 (1.5-5) |
| Time to highest level of block (min) | 10 (5-20) | 10 (5-20) | 8.75 (5-15) | 10 (7.5-20) |
| Motor block | ||||
| Maximum Bromage scale 0-1-2-3 | 7-8-4-1 | 4-9-5-2 | 0-5-9-6*,# | 1-2-10-7*,# |
| Onset time to Bromage 1 (min) | 7.5 (2.5-10) | 5 (2.5-7.5) | 5 (2.5-10) | 5 (2.5-10) |
*
P < 0.05 compared with the group of ropivacaine 7.5 mg;
#
P < 0.05 compared with the group of ropivacaine 9.0 mg.