ESP Block Plane — FRCA Primary MCQ
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Correct answer: E — Erector spinae
The ESP block deposits LA deep to the erector spinae muscle and superficial to the transverse processes. The LA spreads cranio-caudally and penetrates anteriorly into the paravertebral space blocking dorsal and ventral rami of spinal nerves. It is used for thoracic and abdominal wall analgesia with a favourable safety profile compared to paravertebral and neuraxial techniques.
Reference: RCoA 2021 Primary FRCA Curriculum