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