Effect of norepinephrine dosage and calibration frequency on accuracy of pulse contour-derived cardiac output

Table 3 Results of Bland-Altman analysis of PCCO vs. CO_TCP^a

	Number of patients	Mean	Bias	Limits of agreement	Percentage error
Parameter	( n_all / n_patient )	(L/min)	(L/min)	(L/min)	(%)
All	330/73	8.1	0.16	-2.81-3.15	38
No NE	142/44	8.41	0.16	-3.12-3.44	40
NE < 0.1 (μg/kg/min)	82/38	8.50	0.06	-3.88-4.00	47
NE ≥ 0.1 (μg/kg/min)	79/30	7.87	0.29	-1.83-2.42	28^b
Calibration interval 0 to 2 hours	36/25	8.00	0.25	-4.00-4.51	54
Calibration interval 2 to 4 hours	48/35	7.78	0.12	-3.37-3.60	46
Calibration interval 4 to 8 hours	95/41	8.21	0.09	-2.43-2.61	31
Calibration interval 8 to 16 hours	101/47	8.19	0.21	-3.17-3.59	42
Calibration interval 16 to 24 hours	50/28	8.06	0.23	-2.90-3.34	40

^an_all, number of measurement pairs for pulse contour-derived cardiac output (PCCO) and transcardiopulmonary thermodilution cardiac output (CO_TCP); n_patient, number of patients; mean, mean of all PCCO and CO_TCP measurements. ^bInterchangeability according to Critchley and Critchley [20]. Bias and limits of agreement were calculated according to the method of Bland and Altman [19].

ISSN: 1364-8535