This prospective, randomized study compared the analgesia obtained after the epidural injection of fentanyl (50 μg) after 0.5% bupivacaine, 2% lidocaine with epinephrine 1:200,000, or 3% 2-chloroprocaine anesthesia for cesarean section. Satisfactory analgesia was obtained for up to 45 minutes mean duration after the loss of sensory anesthesia after bupivacaine and lidocaine. Analgesia following 2-chloroprocaine anesthesia did not extend beyond the regression of sensory anesthesia to pinprick. Alkalinization of the 2-chloroprocaine to a pH of 7.09 did not lengthen the duration of analgesia.
- Post operative
- Local narcotics
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