Supraclavicular block pleural risk — FRCA Primary MCQ

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HardAnatomySupraclavicular block pleural riskFRCA Primary

During an ultrasound-guided supraclavicular brachial plexus block, a bright curved line lies deep to the plexus. Which structure is this?

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Correct answer: C — Pleura

The best answer is “Pleura”. At the supraclavicular level, the pleura may be seen as a bright moving line deep and medial to the brachial plexus. It must be identified to reduce pneumothorax risk. The other structures have different sonographic positions and appearances at this level.

Reference: RCoA, Primary FRCA Syllabus: https://rcoa.ac.uk/sites/default/files/documents/2026-01/Primary-FRCA-Syllabus.pdf