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Breathing circuits

The Primary ( ) and Final () FRCA examinations require an extensive knowledge of breathing circuits. We have therefore written a new educational resource section on this subject. The tutorials have been tailored to the FRCA syllabus and we have also added some past questions relevant to these topics.

 Primary FRCA Syllabus


Anaesthetic equipment and safety

 Pre-use checks of…breathing systems 

Q. Primary Viva

Describe the Mapleson classification of breathing circuits


 Final FRCA Syllabus

Clinical Measurement

 The Final examination assumes knowledge of the Primary FRCA examination syllabus, with the addition of more sophisticated measurements. There is an emphasis on clinical applications of clinical measurement  

Q. Final Viva Question

What are the advantages and disadvantages of using an Ayre's T-piece?

Articles on breathing circuits

Introduction to breathing circuits
Non-rebreathing circuits
Mapleson A (Magill circuit)
Mapleson A circuit
Lack circuit
Mapleson B
Mapleson C
Mapleson D
Ayre's T-Piece
Mapleson F
Circle system

 would like to thank Dr Guy Watney for allowing the reproduction of his images for this educational resource.


This section is supported using an unrestricted educational grant from Intersurgical

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