Cricothyroid membrane — FRCA Primary MCQ

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EasyAnatomyCricothyroid membraneFRCA Primary

In a cannot-intubate cannot-oxygenate scenario, the membrane between thyroid and cricoid cartilages is palpated. Which anatomical structure is described?

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Correct answer: D — Cricothyroid membrane

Emergency front-of-neck access targets the cricothyroid membrane. T6 dermatome is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. C3 to C5 roots is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Internal superior laryngeal nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Obturator 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