Effective Dose 90 of Programmed Intermittent Epidural Bolus Volume at Three Ropivacaine Concentrations with Dural Puncture Epidural for Labor Analgesia: A Randomized Sequential Allocation Study
Background This study aimed to explore the ED90 of programmed intermittent epidural bolus (PIEB) volume for labor analgesia with different concentrations of ropivacaine when combining with dural puncture epidural (DPE) techniques. Methods Ninety patients were randomized to three groups (n=30 each) to receive an initial...