Table 2.
Cardiac index measurements by Starling SV compared to bolus thermodilution technique with a pulmonary artery catheter
| Starling SV | All n = 579 |
Phase 1 n = 24 |
Phase 2 n = 27 |
Phase 3 n = 85 |
Phase 4 n = 104 |
|---|---|---|---|---|---|
|
Bias (L min−1 m−2) (95% CI) |
0.13 (0.07 to 0.18) |
0.21 (− 0.04 to 0.46) |
0.21 (− 0.07 to 0.49) |
− 0.36 (− 0.49 to − 0.24) |
− 0.02 (− 0.16 to 0.12) |
|
LOA lower (L min−1 m−2) (95% CI) |
− 1.23 (− 1.45 to − 1.01) |
− 0.83 (− 1.26 to − 0.41) |
− 1.08 (− 1.61 to − 0.56) |
− 1.45 (− 1.82 to − 1.08) |
− 1.34 (− 1.79 to − 0.9) |
|
LOA upper (L min−1 m−2) (95% CI) |
1.51 (1.29 to 1.73) |
1.38 (0.95 to 1.8) |
1.57 (1.05–2.1) |
0.92 (0.54 to 1.29) |
1.44 (1.0 to 1.88) |
|
Percentage error (95% CI) |
60.7% (51.5 to 69.9) |
46.0% (31.3 to 60.7) |
60.0% (42.9 to 77.1) |
53.2% (32.1 to 74.3) |
65.6% (43.6 to 87.6) |
|
Regression coefficient (L min−1 m−2) (95% CI) |
0.34 (0.21 to 0.47) |
0.39 (− 0.02 to 0.79) |
0.31 (− 0.31 to 0.93) |
0.28 (− 0.09 to 0.64) |
0.09 (− 0.26 to 0.43) |
| Error grid | |||||
| Zone 1 | 29.0% | – | – | 28.4% | 26.0% |
| Zone 2 | 15.3% | – | – | 18.5% | 15.4% |
| Zone 3 | 34.3% | – | – | 37.0% | 30.8% |
| Zone 4 | 21.4% | – | – | 16.0% | 27.9% |
Phase 1 is before induction of anesthesia, phase 2 is during the construction of the proximal anastomoses to the ascending aorta, phase 3 is distal coronary anastomoses, phase 4 is postoperatively in the intensive care unit before extubation. Error grid analysis was not made for the phases 1 and 2 because of the small number of measurements. n number of CI measurements during the phase. LOA limits of agreement