Efficacy of ultrasound-guided axillary brachial plexus block: a comparative study with nerve stimulator-guided method.

Background: The aim of this study was to compare the efficacy of axillary brachial plexus block using an ultrasound-guided method with the nerve stimulator-guided method. We also compared the efficacy of ultrasound-guided single-injection with those of double-injection for the quality of the block.

Methods: Ninety patients scheduled for surgery of the forearm or hand were randomly allocated into three groups (n = 30 per group), i.