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Bias analysis between cardiac output measurements. (a) Cardiac output obtained by partial carbon dioxide rebreathing of duration 35 s (CONI,35s) and thermodilution technique (COTD). (b) Cardiac output obtained by partial carbon dioxide rebreathing of duration 50 s (CONI,50s) and COTD. (c) CONI,35s and CONI,50s. Dotted lines show bias and limits of agreement between the two methods.
