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Oxygen uptake has been measured in congenital heart disease in sedated infants breathing spontaneously via an open circuit (Cayler, Rudolph and Nadas, 1963; Lees, Way and Ross, 1967), and in awake infants by closed circuit (Levison, Delivoria-Papodopoulos and Swyer, 1965). Neither method is suitable during general anaesthesia, the open circuit destroys the(More)
A paramagnetic method of carbon dioxide analysis enables the simultaneous analysis of carbon dioxide and oxygen to be made at 2-min intervals. The method depends upon observing the change of oxygen concentration in a gas mixture before and after absorbing the carbon dioxide component. The carrier-gas in the experiments reported was nitrogen. The output of(More)