Accuracy of Cardiac Output by Nine Different Pulse Contour Algorithms in Cardiac Surgery Patients: A Comparison with Transpulmonary Thermodilution
Table 3
Correlation and Bland-Altman analysis showing bias, standard deviation from bias, 95% limits of agreement, and percentage error before (T1) and after (T2) cardiopulmonary bypass for nine different pulse contour algorithms compared with transpulmonary thermodilution.
Before CPB (T1)
After CPB (T2)
X1
X2
X3
X4
X5
X6
X7
X8
X9
X1
X2
X3
X4
X5
X6
X7
X8
X9
Mean (L/min)
2.84
3.08
3.09
3.42
3.18
3.12
2.93
2.93
2.99
5.61
5.52
5.58
5.38
5.52
5.64
5.67
5.67
5.69
Bias (L/min)
−1.00
−0.75
−0.75
−0.43
−0.66
−0.72
−0.91
−0.91
−0.85
−0.05
−0.14
−0.08
−0.28
−0.14
−0.02
0.03
0.02
0.04
SD of bias (L/min)
1.09
1.03
1.06
0.89
1.05
1.17
1.09
1.08
1.05
1.95
1.71
1.76
1.37
1.48
1.79
1.94
1.96
1.86
Correlation ()
0.10
0.20
0.18
0.36
0.20
0.15
0.13
0.15
0.17
0.42
0.45
0.42
0.56
0.48
0.45
0.44
0.42
0.44
95% limits of agreement (L/min)
−3.14–+1.14
−2.77–+1.27
−2.83–+1.33
−2.18–+1.32
−2.71–+1.39
−3.00–+1.57
−3.05–+1.22
−3.03–+1.22
−2.91–+1.21
−3.89–+3.78
−3.49–+3.21
−3.53–+3.37
−2.98–+2.41
−3.04–+2.75
−3.53–+3.49
−3.80–+3.81
−3.82–+3.87
−3.61–+3.70
Percentage error (%)
65
59
61
49
59
67
64
63
61
69
61
62
49
53
63
68
69
65
CPB, cardiopulmonary bypass; , cardiac output by nine different pulse contour algorithms.
