Jackson-Rees Modification — FRCA Primary MCQ
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Correct answer: C — A reservoir bag with an open tail allowing both spontaneous and controlled ventilation
The Jackson-Rees modification adds an open-ended bag to the Mapleson E T-piece. This allows: visual assessment of spontaneous ventilation / manual IPPV by occluding the open tail / and CPAP application. The open tail allows excess gas to escape to scavenging. It remains lightweight and low dead-space for paediatric use.
Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment