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Measurement of cardiac output in children: comparison between direct Fick method and pressure recording analytical method: preliminary report
Critical Care volume 19, Article number: P170 (2015)
There are few methods of cardiac output (CO) estimation validated in children. The aim of this study is to investigate the reliability of an uncalibrated pulse contour method of CO estimation, the pressure recording analytical method (PRAM), in pediatric patients scheduled for diagnostic right and left heart catheterization, compared with the oxygen-direct Fick method.
Cardiac index (CI) was simultaneously estimated by Fick, and PRAM applied to pressure signals recorded invasively from a femoral catheter. All measurements were performed in steady-state condition. PRAM CI measurements were obtained for 10 consecutive beats simultaneously during the Fick CI estimation. Agreement between Fick and PRAM was assessed using the Bland-Altman method. Correlation coefficient, bias, and percentage of error were calculated.
Forty-three CI measurements were performed in 43 patients. The data showed good agreement between CIFick and CIPRAM: r2 = 0.98; bias -0.0074 l/minute/m2; limits of agreement from -0.22 to 0.22 l/minute/m2. The percentage error was 8%. Figure 1 shows the Bland- Altman plot.
PRAM provides reliable estimates of cardiac output in hemodynamically stable pediatric cardiac patients compared with the Fick method.
Romano M, et al: Care Med. 2002, 30: 1834-41. 10.1097/00003246-200208000-00027.
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Iñigo, J.A., Escribá, F., Carrasco, J. et al. Measurement of cardiac output in children: comparison between direct Fick method and pressure recording analytical method: preliminary report. Crit Care 19, P170 (2015). https://doi.org/10.1186/cc14250
- Cardiac Output
- Cardiac Index
- Percentage Error
- Preliminary Report