A 25 yr old male is undergoing incision and drainage of abscess under general anaesthesia with spontaneous respiration. The most efficient anaesthetic circuit is:
Mapleson A Breathing circuits A. Open system (Out dated) B. Semiopen (Out dated) C. Semiclosed (Mapleson circuits) D. Closed
Mapleson A
Mapleson B
Mapleson C
Mapleson D