Impact of Gas Delivery Systems on Imaging Studies of Human Cerebral Blood Flow
Figure 1
(a) Hudson mask with oxygen tubing. (b) Mapleson A semi-open circuit with mouthpiece (exhaust tubing removed for clarity). (c) Schematic diagram of Mapleson A circuit: 3 way T-tube connected to the fresh gas outlet (F), a breathing bag (B), and a reservoir tube (R). Reservoir tube is connected to the patient (P) and a spring-loaded expiratory valve (V) (image courtesy of Anaesthesia UK (http://www.frca.co.uk/).
