• Anaesthesia · Dec 1990

    Randomized Controlled Trial Comparative Study Clinical Trial

    Obstetric epidural analgesia with mixtures of bupivacaine, adrenaline and fentanyl.

    • G Yau, M A Gregory, T Gin, and T E Oh.
    • Department of Anaesthesia and Intensive Care, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin.
    • Anaesthesia. 1990 Dec 1;45(12):1020-3.

    AbstractWe performed a double-blind comparison of six solutions for epidural analgesia in 90 healthy Chinese women with uncomplicated pregnancies. Patients were randomly allocated to receive 10 ml bupivacaine 0.125% or 0.25% plain, bupivacaine 0.125% with adrenaline 1.25 micrograms/ml, bupivacaine 0.25% with adrenaline 2.5 micrograms/ml or the latter two solutions with added fentanyl 50 micrograms. Analgesia was unsatisfactory in 30% of the bupivacaine 0.125% groups without fentanyl. The addition of adrenaline, compared with bupivacaine 0.25% plain, gave faster onset and longer duration of analgesia (p less than 0.05) which was similar to that found in both fentanyl groups. There were no differences in method of delivery or neonatal Apgar scores among groups. The least concentrated mixture that gave the best analgesia was the combination of bupivacaine 0.125% with adrenaline 1.25 micrograms/ml and fentanyl 50 micrograms.

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