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Objectives: The aim of the study is to determine the duration of action and ideal effective doses of bupivacaine-lidocaine combination in different concentrations for infraclavicular brachial plexus block. Material and Methods: Patients were randomized into 3 groups, consisting of 20 patients and applied 15 mL 0.5% bupivacaine15 mL 2% lidocaine to the first, 15 mL 0.5% bupivacaine15 mL 2% lidocaine with 30 mL saline to the second, 10 mL 0.5% bupivakain10 ml 2% lidocaine with 40 mL saline to the third group. Onset and duration of motor and sensory blocks, additional analgesic requirements, postoperative Visual Analogue Scale scores were recorded. Results: Groups were similar according to demographics, time until operation after block, operation time, perioperative and postoperative mean arterial pressure, heart rates, SpO2 values. Initiation of sensory block time was significantly longer in Group 1 than the others. Motor block initiation time was significantly longer in Group 1 than the other groups. Postoperative sensory and motor block performance time was significantly shorter in Group 1 than the other groups. Additional analgesic requirement and Visual Analogue Scale scores were highest in Group 1 (p<0.05). Conclusion: In the current study we observed that by increasing the volume of local anesthetic solution, the time for initiation of sensory and motor block decreases and the duration of both sensory and motor block increases. We concluded that using decreased amount of bupivacaine-lidocaine combination to 60 mL, may cover the surgery and is efficient for postoperative analgesia.

Comparison of Different Doses and Concentrations of Bupivacaine and Lidocaine Combination for Infraclavicular Brachial Plexus Block