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Spinal Dose for Caesarean Section — FRCA Final MCQ

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EasyObstetric AnaesthesiaSpinal Dose for Caesarean SectionFRCA Final

A 30-year-old woman (ASA I, 55 kg) at 39 weeks gestation requires a category 1 caesarean section. A spinal anaesthetic is chosen. The standard intrathecal dose of heavy bupivacaine 0.5% for caesarean section in the UK is:

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Correct answer: A — 2.0-2.5 mL (10-12.5 mg)

The standard intrathecal dose of hyperbaric bupivacaine 0.5% for caesarean section in the UK is 2.0-2.5 mL (10-12.5 mg), usually with an intrathecal opioid (diamorphine 300-400 mcg or fentanyl 15-25 mcg). The dose may be adjusted based on patient height and expected block level required. Lower doses (1.5-1.8 mL) can be used for combined spinal-epidural (CSE) techniques where the epidural can supplement the block. The target sensory level is T4 bilaterally.

Reference: OAA – 2024 – Quick Reference Handbook: Spinal for CS; RCOA GPAS – 2025 – Chapter 9