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Title: A multicentre trial comparing different concentrations of ropivacaine plus sufentanil with bupivacaine plus sufentanil for patient-controlled epidural analgesia in labour. Author: Gogarten W, Van de Velde M, Soetens F, Van Aken H, Brodner G, Gramke HF, Soetens M, Marcus MA. Journal: Eur J Anaesthesiol; 2004 Jan; 21(1):38-45. PubMed ID: 14768922. Abstract: BACKGROUND AND OBJECTIVE: To determine the optimal concentration of ropivacaine for bolus-only patient-controlled epidural labour analgesia, three different doses of ropivacaine were evaluated in comparison with bupivacaine in a double-blinded multicentre study. METHODS: Four hundred-and-fifty labouring parturients at term in three different academic institutions were randomized to four groups receiving bupivacaine 0.125% with sufentanil 0.75 microg mL(-1), ropivacaine 0.125% or 0.175% with sufentanil 0.75 microg mL(-1), or ropivacaine 0.2%. After an initial bolus of 10 mL of the study solution, and once visual analogue scores (VAS) were below 30 mm, patient-controlled epidural analgesia was initiated with a bolus of 4 mL, a lockout interval of 15 min and without a background infusion. Variables studied were the quality of analgesia, incidence of side-effects, the degree of motor blockade, and the mode of delivery. RESULTS: Bupivacaine 0.125% and ropivacaine 0.125% with sufentanil proved equally effective in providing labour analgesia without a difference in local anaesthetic consumption (48.6 +/- 23 mg bupivacaine vs. 52.1 +/- 38 mg ropivacaine), motor blockade or mode of delivery. Ropivacaine 0.175% plus sufentanil enhanced the quality of analgesia of the initial loading dose, whereas ropivacaine 0.2% without sufentanil increased the consumption of local anaesthetics (80.2 +/- 34 mg; P < 0.05) and the degree of motor blockade. CONCLUSION: Despite recent studies indicating that bupivacaine and ropivacaine may not be equipotent, both local anaesthetics provided equi-effective analgesia at equal doses without a difference in side-effects.[Abstract] [Full Text] [Related] [New Search]