Background: Brachial plexus block via the axillary approach is problematic in patients with limited arm mobility. In such cases, the infraclavicular approach may be a valuable alternative. The purpose of our study was to compare axillary and infraclavicular techniques for brachial plexus block in patients undergoing arm or forearm surgery.
Methods: After institutional approval and informed consent were obtained, 30 patients (ASA physical status I or II) scheduled for forearm and hand surgery under brachial plexus anesthesia were included in the study. Patients were randomly allocated into two groups. Brachial plexus block was performed via the axillary approach in the Group A patients and via the infraclavicular approach in the Group I patients using a peripheral nerve stimulator. All blocks were performed with a total dose of 40 ml 0.375% bupivacaine.
Results: In each nerve territory (radial, ulnar, median, and musculocutaneous), the mean values of the degree and the duration of the sensory block and motor block were not significantly different between the two groups (P > 0.05). Inadvertent vessel puncture was significantly more frequent in the axillary approach (P < 0.05).
Conclusion: Brachial plexus block performed via the infraclavicular approach is as safe and effective as the axillary approach. Infraclavicular approach may be preferred to the axillary approach when the upper arm mobility is impaired or not desired.
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