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Abstract

Background: Ultrasound (US) guidance and peripheral nerve stimulator for supraclavicular brachial plexus block have enhanced the success rates of the block with excellent localization. Nevertheless, only few studies are present on peripheral nerve stimulator-assisted US guidance for brachial plexus block in upper limb surgeries. Objectives: To compare US guidance with nerve stimulator-assisted US guidance for supraclavicular brachial plexus block in patients undergoing limb surgeries. Method: Patients (n = 70) undergoing elective upper limb surgeries by supraclavicular brachial plexus block were involved. Randomization of patients was done to perform supraclavicular brachial plexus block either under US guidance (Group A = 35) or under nerve stimulation-assisted US guidance (Group B = 35). Demographic data including age, gender, and weight of the patients, were recorded. Time of performance of block, onset of sensory and motor block, duration of sensory and motor block, and hemodynamic changes (pulse rate, systolic and diastolic pressure), were the parameters compared between the groups. Chi-square test and unpaired t-test were used to analyse the data. Results: Demographic data was comparable in both groups. The mean time taken for the performance of block by eliciting paraesthesia was significantly less in Group B compared to Group A (5.87 ± 1.07 vs. 10.22 ± 2.11 min; P < 0.001). The mean time taken for onset of sensory (6.79 ± 1.04 vs. 9.28 ± 1.86 min; P < 0.001) and motor blockade (14.56 ± 2.53 vs. 17.69 ± 1.45 min; P < 0.001) was also significantly less in Group B compared to Group A. Conclusion: Nerve stimulator-assisted US guidance for supraclavicular brachial plexus block is a feasible technique in patients undergoing limb surgeries, in terms of reduced time taken for the performance of the block, and the onset of sensory and motor block.