alexa A comparison between ultrasound-guided infraclavicular block using the "double bubble" sign and neurostimulation-guided axillary block.


Journal of Anesthesia & Clinical Research

Author(s): Tran DQ, Clemente A, Tran DQ, Finlayson RJ

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Abstract BACKGROUND: Ultrasound-guided infraclavicular block can be performed using the double bubble sign. Previously described, the double bubble sign consists superiorly of the axillary artery (in short axis) superimposed on an inferior bubble created by local anesthetic injection. In this study, we compared this new method of brachial plexus anesthesia to the traditional triple-nerve stimulation axillary block. METHODS: Seventy patients were randomized to receive a single-injection, ultrasound-guided infraclavicular block using the double bubble sign or a triple-stimulation axillary block. RESULTS: Both methods produced similar success rates (89\%-91\%). However, infraclavicular blocks were associated with a shorter performance time (3.90 +/- 2.27 vs 8.03 +/- 3.92 min; P < 0.001) and lower block-related pain scores (2.70 +/- 2.02 vs 4.17 +/- 2.57 on a 0-10 scale; P = 0.01). CONCLUSION: Compared to triple-stimulation axillary block, ultrasound-guided infraclavicular block using the double bubble sign provided a similar efficacy, a shorter performance time and lower procedural pain scores. This article was published in Anesth Analg and referenced in Journal of Anesthesia & Clinical Research

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