The purpose of this study is to evaluate whether changing the volume and concentration of a medication affects the quality of pain relief and the side effects associated with labor epidural analgesia.
18 years of age or older
Gestational age of 36 weeks or greater
American Society of Anesthesiology physical status 2
Induction of labor or early labor (cervical dilation < 6cm)
Preeclampsia
Receiving magnesium sulfate
Having received narcotics within 4 hours
Multiple gestation
Parallel
administration of bupivacaine 7.5 mg and fentanyl 24 mcg every 40 minutes
DrugDose of medication delivered using a programmed intermittent epidural bolus
Patient controlled boluses received
The number of patient-controlled boluses received by the patient by pressing the patient-controlled analgesia (PCA) button for additional pain relief
Patient controlled boluses requests
The number of patient controlled boluses requested by pressing the PCA button for additional pain relief
Physician administered epidural bolus
The number of times that a physician supplies additional medication for the control of pain
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