A comparison of the dose of anesthetic agents and the effective interval from the block procedure to skin incision for ultrasound-guided supraclavicular brachial plexus block in upper extremity surgery

The total volume of anesthetic agents had an important influence on the rate of the addition of local anesthesia for surgical pain; however, the combined dose of agents did not influence the evaluation items. For effective analgesia, ≥24 min should elapse from the end of the block procedure to skin incision.