Reliability of the cardiac output measurement with the indirect Fick-principle for CO2 during exercise

1980 ◽  
Vol 385 (1) ◽  
pp. 21-23 ◽  
Author(s):  
C. L. A. van Herwaarden ◽  
R. A. Binkhorst ◽  
J. F. M. Fennis ◽  
A. van't Laar
Keyword(s):  
Cardiac Output ◽  
Cardiac Output Measurement ◽  
Output Measurement ◽  
Fick Principle

Modern gold standard of cardiac output measurement – A simplified bedside measurement of individual oxygen uptake in the cath lab

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Georg Schmücker ◽  
Christof Burgdorf ◽  
Jan-Henrik Blohm ◽  
Mathias Bugno ◽  
Kathrin Meyer ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Oxygen Uptake ◽  
Real Time ◽  
Gold Standard ◽  
Cardiac Output Measurement ◽  
Heart Catheterization ◽  
Gas Analyzer ◽  
Output Measurement ◽  
Fick Principle ◽  
Metabolic Cart

Abstract Objectives Cardiac output (CO) measurements employing the direct Fick principle represent the gold standard in right-sided heart catheterization (RHC). The current widespread approach in hemodynamic workup however uses the indirect Fick principle with assumed values for oxygen uptake (VO2) leading to incorrect CO values in up to 25% of patients. We have tested a contemporary breath-by-breath gas analyzer that allows precise real-time measurements of VO2 with appropriate time and effort to serve the direct Fick principle. Methods By means of a small and mobile metabolic cart assembled with widely used components of a standard spiroergometer, we performed bedside measurements of individual VO2. In 33 unselected, consecutive patients with various indications for RHC we compared CO values derived from indirect vs. direct Fick calculations. Results In 28 of the 33 patients, VO2 measurements were completed with a plausible dataset within a median of 3.2 (interquartile range 2.8–6.2) min. In nine of the 28 patients, CO values based on measured VO2 values differed by more than 20% from CO calculations based on assumed VO2 values with value deviations scattering over a broad range in both directions (maximally +52% to minimally −46%). Conclusions The bedside measurement of VO2 for gold standard CO determination is technically feasible within a few min and can thus be easily included in any RHC protocol. As modern therapy for numerus indications demand a precise upfront measurement of hemodynamics, our method might help to correctly identify patients for costly therapies.

Non-Invasive Cardiac Output Measurement: Where Are We Now?

2018 ◽  
Vol 5 (4) ◽  
pp. 221-227
Author(s):  
Mingqiang Li ◽  
Longqiu Yang ◽  
Liwen Zhou ◽  
Jasmine Liu ◽  
Srikant Patel ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Cardiac Output Measurement ◽  
Output Measurement ◽  
Non Invasive

Automated Cardiac Output Measurement by Spatiotemporal Integration of Color Doppler Data

Circulation ◽  
1997 ◽  
Vol 95 (4) ◽  
pp. 932-939 ◽  
Author(s):  
Jing Ping Sun ◽  
Min Pu ◽  
Fetnat M. Fouad ◽  
Raymond Christian ◽  
William J. Stewart ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Color Doppler ◽  
Cardiac Output Measurement ◽  
Output Measurement ◽  
Doppler Data ◽  
Spatiotemporal Integration
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