From: Optimization of programmed intermittent epidural bolus volume for different concentrations of ropivacaine in labor analgesia: a biased coin up-and-down sequential allocation trial
PIEB bolus volume(mL)
Rate of effective analgesia n(%)
Group A(n = 52)
group B(n = 51)
7
0(0)
8
1(50.00%)
6(50.00%)
9
1(25.00%)
23(88.46%)
10
17(70.83)
10(90.91%)
11
21(100.0%)
1(100.00%)
12