Unilateral Dense Epidural Obstetric — FRCA Final MCQ

Instant feedback + full explanation. One question, done properly.

HardObstetric AnaesthesiaUnilateral Dense Epidural ObstetricFRCA Final

Epidural in labour: dense unilateral right motor block, no left sensory block. Most likely cause?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: B — Catheter through foramen into paravertebral space

Dense unilateral block with no contralateral spread = lateral catheter migration through intervertebral foramen into paravertebral space. LA around single root = ipsilateral-only. Withdraw 1-2 cm, rebolus, reassess. If persistent, resite.

Reference: RCOA – 2023 – Obstetric epidural troubleshooting