Circuit for spontaneous respiration in adults:

Ref. Oxford textbook of anesthesia. Page. 330   Spontaneous respiration: A>D,E>C >B IPPV :D&E> B> C> A Mapleson A : For adult Magill system Flow rate = Minute volume Mapleson B: - not used Mapleson C : Water system Choice in Post operative room Mapleson D: Bain – Coaxial system Most effective in assisted control ventilation Mapleson E: Ayre’s T tube Infants and young children