- Poster presentation
- Open Access
Continuous cardiac output measurement: effect of time
© BioMed Central Ltd. 2010
- Published: 1 March 2010
- Cardiac Output
- Pulmonary Artery
- Regression Line
- Time Effect
Calibration turns pulse contour methods of cardiac output measurement from continuous to intermittent. We evaluated the necessity to recalibrate pulse contour cardiac output methods; LiDCO™plus (LCO), FloTrac/Vigileo (FCO), PiCCO (PCO) and continuous CO measurement with pulmonary artery catheter (Vigilance) (CCO).
In 28 cardiac surgery patients, data were collected at 1 hour (T1), 2 hours (T2), 4 hours (T3), 8 hours (T4), 12 hours (T5), 24 hours (T6), 36 hours (T7), and 48 hours (T8) after ICU admission. Devices were only calibrated at start of the investigation period. To compute effect against time, at each time point, the CO values from LCO, FCO, PCO and CCO were subtracted, and compared with COtd (ICO). Effect of time was quantified by calculating the slope values using linear regression. Slope values of the regression line were tested against a horizontal line (no effect).
PiCCO and FloTrac/Vigileo showed an effect with time. For PiCCO, our findings are in accordance with the publications of Boyle and Hanzaoui.