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  • Title: Comparison of ropivacaine 0.1%-fentanyl and bupivacaine 0.125%-- fentanyl infusions for epidural labour analgesia.
    Author: Finegold H, Mandell G, Ramanathan S.
    Journal: Can J Anaesth; 2000 Aug; 47(8):740-5. PubMed ID: 10958089.
    Abstract:
    PURPOSE: To compare analgesic efficacies of ropivacaine-fentanyl and bupivacaine-fentanyl infusions for labour epidural analgesia. METHODS: In this double- blind, randomized study 100, term, nulliparous women were enrolled. Lumbar epidural analgesia (LEA) was started at cervical dilatation < 5 cm using either bupivacaine 0.25% followed by bupivacaine 0.125% + 2 microg x ml(-1) fentanyl infusion (n=50) or ropivacaine 0.2% followed by ropivacaine 0.1% + 2 microg x ml(-1) fentanyl infusion (n=50). Every hour maternal vital signs, visual analog scale (VAS) pain score, sensory levels, and motor block (Bromage score) were assessed. Data were expressed as mean +/-1 SD and analyzed using Chi -Squared and Mann-Whitney U tests at <0.05. RESULTS: The onset times were 10.62+/-4.9 and 11.3+/-4.7 min for the bupivacaine and ropivacaine groups respectively (P = NS). The median VAS scores were not different between the groups at any of the evaluation periods. However, at least 80% of patients in the ropivacaine group had no demonstrable motor block after the first hour compared with only 55% of patients given bupivacaine (P =0.01). CONCLUSIONS: Both bupivacaine and ropivacaine produce satisfactory labour analgesia. However, ropivacaine infusion is associated with less motor block throughout the first stage of labour and at 10 cm dilatation.
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