skip to main content

Carotid sheath — FRCA Primary MCQ

Instant feedback + full explanation. One question, done properly.

HardAnatomyCarotid sheathFRCA Primary

The sheath contents are reviewed before internal jugular cannulation. Which anatomical structure is described?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: D — Carotid sheath vagus nerve

The carotid sheath contains carotid artery, IJV and vagus nerve. Internal jugular vein anterolateral to carotid artery is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Cricothyroid membrane is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Femoral and lateral femoral cutaneous nerves is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Phrenic nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. In Primary FRCA anatomy, the tested structure should explain the block, airway sign or regional complication in the stem.

Reference: Ellis, Feldman & Harrop Anatomy for Anaesthetists; Primary FRCA textbooks