In this video , we discuss the working principles, types, efficiency and functionality of Mapleson Circuits and try to scientifically understand two key questions
1. Why Mapleson A is best for spontaneous ventilation?
2. Why Mapleson D is best for Controlled Ventilation?

Mapleson A (Magill)
Mapleson B
Mapleson C
Mapleson D (Bain)
Mapleson E (Ayre's T piece)
Mapleson F ( Jackson Rees Modification)

0:00 Intro
0:23 Components of Mapleson Circuits - Breathing tubes
1:29 Components of Mapleson Circuits - APL (Pop-off Valve)
2:07 Components of Mapleson Circuits - Reservoir Bag + Three phases of expansion
2:42 Components of Mapleson Circuits - Fresh Gas Inlet (FGI)
3:16 Classification/Configuration of Mapleson Circuits (structure)
5:48 Classification/Efficiency of Mapleson Circuits (FGI Requirements for Spont/Controlled vent)
7:33 Why Mapleson A / Magill is best (most efficient ) for Spontaneous ventilation?
8:44 Why Mapleson A / Magill is worst (least efficient ) for Controlled ventilation?
9:52 Why Mapleson D / Bain Circuit is best (most efficient ) for Controlled ventilation?