| Cumulative proportion of patients continuing without a top-up after epidural infusion of 0.08% bupivacaine at 15mls/hr, with or without fentanyl 2.5 mcg/ml. B = Bupivacaine alone. B+F = Bupivacaine + Fentanyl Reproduced with permission from: Jones G et al Br. J. Anaesth. 1989; 63:3 254 - 9. |