镇痛起效时间min

初次PCA时间min

用药总量ml

A组

9.3 ± 0.9

98.8 ± 9.9

18.2 ± 14.7

B组

12.8 ± 2.3

58.9 ± 14.6

25.4 ± 15.5

C组

16.0 ± 1.4

44.8 ± 7.2

28.2 ± 16.5