Clinical Observation on Effect of Butorphanol Used with Local Anesthetic for Brachial Plexus Block

Objective:To observe the postoperative analgesia produced by the addition of butorphanol to local anesthetic in brachial plexus block. Methods: Forty ASA I～II patients scheduled for upper extremity surgery under brachial plexus block were randomly allocated into two groups.Group A received 25mL of the mixture solution of 0.25% lebutorphanol and l% lignocaine plus butorphanol 1 mg for brachial plexus block,group B used the same local anesthetic alone.The visual analogue scale(VAS) and side effects were evaluated at 1h after local anesthetic infusion and 4、8、12、24、36、48h after operation. The analgesia was considered satisfactory if the score was 3 or less or if the patient was asleep.Results: The VAS was significantly lower and the median duration of satisfactory analgesia lasted significantly longer in group A than those in group B(P0.01).Conclusion:The addition butorphanol to local anesthetic in brachial plexus block enhances and prolongs the analgesia.