• Can J Anaesth · May 1993

    Randomized Controlled Trial Comparative Study Clinical Trial

    A comparative study of patient-controlled epidural fentanyl and single dose epidural morphine for post-caesarean analgesia.

    • P Y Yu and D R Gambling.
    • Department of Anaesthesia, Grace Hospital, Vancouver, British Columbia, Canada.
    • Can J Anaesth. 1993 May 1;40(5 Pt 1):416-20.

    AbstractIn a prospective, randomized, double-blinded study, 23 patients who had undergone Caesarean delivery under epidural anaesthesia were assessed to evaluate the effectiveness of patient-controlled epidural analgesia (PCEA) with fentanyl compared with a single dose of epidural morphine for postoperative analgesia. Group A (n = 11) received epidural fentanyl 100 micrograms intraoperatively then self-administered a maximum of two epidural fentanyl boluses 50 micrograms (10 micrograms.ml-1) with a lockout period of five minutes for a maximum of two doses per hour. Group B (n = 11) received a single bolus of epidural morphine 3 mg (0.5 mg.ml-1) intraoperatively and received the same instructions as Group A but had their PCA devices filled with 0.9% NaCl. Patients were assessed up to 24 hr for pain, satisfaction with pain relief, nausea and pruritus using visual analogue scales (VAS). The treatments for inadequate analgesia, nausea and pruritus as well as time to first independent ambulation were recorded. The ventilatory response to carbon dioxide challenge was measured at four and eight hours. Pain relief, satisfaction with pain relief, and the use of supplemental analgesics were similar in both groups. The mean 24 hr dose of epidural fentanyl used by group A patients was 680 micrograms. Pruritus was less common in Group A patients at the 8 and 24 hr observation periods (P < 0.0125). Both groups experienced the same degree of nausea and clinically unimportant respiratory depression. We conclude that PCEA with fentanyl provides analgesia equal to a single dose of epidural morphine and may be suitable for patients who have experienced considerable pruritus after epidural morphine administration.

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