Caudal block — FRCA Primary MCQ
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Correct answer: D — Sacral epidural space
Caudal injection enters the sacral epidural space. C5 to T1 roots 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. Intercostobrachial nerve is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Femoral 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