Table 3.
Agreement between thermodilution CO and investigational CO-from-ABP algorithms
| Investigational Predictors of COTD | “Best Possible Single Calibration” (C1) 95% Limits Agreement (±L/min) | KS Test vs. Mean Arterial Pressure (p) | “First Pairing Calibration” (C2) 95% Limits Agreement (±L/min) | % Agreement of Directional Δ's vs. COTD |
|---|---|---|---|---|
| Liljestrand | –1.76/+1.41 | 0.0001 | –2.81/+2.04 | 78b |
| Corrected impedance | –1.91/+1.57a | <0.01 | –3.39/+2.28 | 78b |
| Pulse pressure | –2.07/+1.73 | >0.05 | –3.05/+2.76 | 74b |
| Systolic area | –2.07/+1.73c | >0.05 | –2.85/+3.05 | 77b |
| Systolic area with Kouchoukos correction | –2.08/+1.71 | >0.05 | –3.20/+2.89 | 78b |
| AC power (root-mean-square) | –2.09/+1.73 | >0.05 | –3.12/+2.78 | 79b |
| Diastolic decay | –2.23/+1.77 | >0.05 | –3.22/+2.57 | 78b |
| Mean arterial pressure | –2.20/+1.82 | – | –3.19/+3.42 | 56 |
| Herd | –2.66/+1.89 | >0.05 | –3.65/+3.16 | 78b |
CO, cardiac output; ABP, arterial blood pressure; COTD, CO thermadilution; KS, Kolmogorov-Smirnov; AC, alternating current.