Pulmonary Artery Catheter (PAC) Accuracy and Efficacy Compared with Flow Probe and Transcutaneous Doppler (USCOM): An Ovine Cardiac Output Validation

Table 3

ROC area under the curve (AUC) values for detection of increased and decreased percentage changes of CO relative to FP where 𝑃 is significance of difference between the two measures. An AUC of 1 represents perfect sensitivity, 0.7 represents clinically acceptable sensitivity to change, while 0.5 is a random relationship.

	−40%	−30%	−20%	−15%	−10%	−5%	+5%	+10%	+15%	+20%	+30%	+40%
PAC	0.855	0.811	0.635	0.549	0.534	0.496	0.524	0.585	0.631	0.659	0.631	0.621
USCOM	0.897	0.881	0.885	0.857	0.842	0.714	0.708	0.754	0.812	0.814	0.790	0.897
𝑃	0.45	0.3	0.004	0.000	0.000	0.000	0.000	0.005	0.01	0.04	0.094	0.06