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Revista médica de Chile

versão impressa ISSN 0034-9887

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ANDRESEN H, Max et al. Comparison of cardiac output measurement in critical patients using transesophageal Doppler or thermodilution: A preliminary report. Rev. méd. Chile [online]. 2005, vol.133, n.7, pp.761-766. ISSN 0034-9887.  http://dx.doi.org/10.4067/S0034-98872005000700002.

Background: Cardiac output can be measured non invasively by transesophageal Doppler. This is an alternative to measure it by thermodilution with a catheter in the pulmonary artery. Aim: To compare both methods of cardiac output measurement. Material and methods: Simultaneous measurement of cardiac output by transesophageal Doppler and thermodilution with a catheter in the pulmonary artery in four male critical patients, aged 60±12 years, hospitalized in a University Hospital. The Bland and Altman method to compare the concordance between two measurements, was used. Results: Forty measurements were performed. The results of both methods had a correlation coefficient of 0.98. According to the Bland and Altman method, the difference between both methods was -0.5 L with a precision of 0.52 L/min (95% confidence interval -1.51 to 0.52 L/min). Considering that a change between two sequential measurements is considered significant when the difference is more than 15%, both measurements agreed in 83% of cases, that there was a change in cardiac output. Conclusions:Transesophageal Doppler is a promising non invasive technique to measure cardiac output in critical care patients. It becomes a valid alternative to the thermodilution technique. This preliminary experience must be confirmed in a larger series

Palavras-chave : Cardiac output; Doppler ultrasonography; Thermodilution.

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