Xiphisternum dermatome — FRCA Primary MCQ
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Correct answer: E — T6 dermatome
The xiphisternum is approximately T6. Femoral nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Subarachnoid space is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Recurrent laryngeal nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Ulnar 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