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  1. True. At least 12–15 l/min. Otherwise there is potential for rebreathing because of carbon dioxide retention in the reservoir bag—exhaled gas will escape only if the fresh gas flow is great enough.1

  2. True. Unless the self-inflating bag has a reservoir, it entrains both air and wall oxygen as it inflates. With a full reservoir, it will deliver closer to 100% oxygen.1

  3. False. While giving better tactile feedback to the airway practitioner, a Water’s circuit is useless if the oxygen supply fails. A self-inflating bag is …

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  • Emergency Medicine Questions (EMQs)
    BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine