Table 2 The spread of the injected solution in the study groups

Upper segments

C8

0

6 (24%)

< 0.001

T1

7 (28%)

17 (68%)

T2

16 (64%)

2 (8%)

T3

2 (8%)

0

Lower segments

T5

4 (16%)

0

0.07

T6

19 (76%)

20 (80%)

T7

2 (8.0%)

5 (20%)

Number of blockade levels

Mean

5.12 ± 0.726

6.36 ± 0.569

< 0.001

4

5 (20%)

0

< 0.001

5

12 (48%)

1 (4%)

6

8 (32%)

14 (56%)

7

0

10 (40%)

C8 to T6 levels block

0

6 (24%)

0.009

T1 to T6 levels block

6 (24%)

23 (92%)

< 0.001

T2 to T6 levels block

19 (76%)

25 (100%)

0.009