The most appropriate circuit for ventilating a spontaneously breathing infant during anaesthesia is:: (A) Jackson Rees' modification of Ayre's T Piece, (B) Mapleson A or Magill's circuit, (C) Mapleson C or Waters' to and fro canister, (D) Bains circuit
Answer is A. The most appropriate circuit advocated for use in infants is the Ayre's T piece (Mapleson E). Ref: Lee's Synopsis of Anaesthesia, 12th Edition, Page 117; Sho Textbook of Anaesthesia By Ajay Yadav, 2nd Edition, Page 27