O2 Flush Flow Rate — FRCA Primary MCQ
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Correct answer: E — 35-75 L/min
The oxygen flush delivers 100% oxygen at 35-75 L/min bypassing vaporisers and flowmeters at pipeline pressure (~400 kPa). Use with caution during spontaneous ventilation with a closed circuit as it can generate dangerously high airway pressures.
Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment