Table 2 Total Dosage of Sufentanil in Group C, D1 and D2

Concentration of sufentanil, μg/ml

0.77 ± 0.11

0.76 ± 0.06

0.72 ± 0.06

0.163(0.552/ 0.063/ 0.200)

Dosage of sufentanil, ml

1 h

2.28 ± 0.41

2.00 ± 0.00

2.05 ± 0.15

0.003(0.001**/0.007**/0.531)

2 h

4.27 ± 0.41

4.05 ± 0.15

4.12 ± 0.29

0.013(0.011*/0.011*/1.000)

4 h

8.40 ± 0.50

8.10 ± 0.30

8.13 ± 0.22

0.020(0.012*/0.020*/0.829)

8 h

16.48 ± 0.57

16.16 ± 0.46

16.17 ± 0.34

0.058(0.032*/0.047*/0.866)

24 h

48.55 ± 0.69

48.25 ± 0.77

48.17 ± 0.34

0.143(0.135/ 0.063/ 0.706)

48 h

96.55 ± 0.69

96.30 ± 0.92

96.17 ± 0.35

0.227(0.258/ 0.092/ 0.570)

Needed additional self- administered sufentanil, n(%)

48 h

20(66.67%)

10(33.33%)

11(36.67%)

0.051(0.030*/0.039*/0.930)

Needed rescue analgesia, n(%)

48 h

0 (0%)

0 (0%)

0 (0%)

1.000