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Non-invasive ultrasonic cardiac output measurement in intensive care unit |
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| Authors: | Bernard I. Levy Didier M. Payen Alain Tedgui Michel Xhaard Malcolm B. McIlroy |
| Affiliation: | a INSERM Unite 141, 41 Bd de la Chapelle, 75010, Paris, France b Service de Reanimation, Hopital Henri Mondor, 94, Creteil, France c INSERM Unite 256, Hopital Broussais, 96 rue Didot, 75014, Paris, France d Cardiovascular Research Institute, University of California at San Francisco, San Francisco, CA 94143, U.S.A. |
| Abstract: | A non-invasive method for measuring cardiac output utilizing M-mode echography and pulsed Doppler ultrasound is described. Measurements were obtained in 26 of 29 randomly selected, mechanically ventilated patients. These values were compared with simultaneously measured cardiac outputs by thermodilution. There was a statistically significant linear relationship between Cardiac Output measured by Doppler (DCO) and Thermodilution (TDCO): DCO = 0.86 TDCO + 0.29 1/min (r = 0.96, N = 26, SEE = 0.45 1/min) over the range of 1.75-8.5 1/ min. DCO had the additional advantage of measuring peak flow velocity and maximal blood flow acceleration during early systole, indices of left ventricular pumping ability. Ultrasonic monitoring of cardiac output may be an important supplement to invasive methods in critical care. |
| Keywords: | Cardiac output Echography Intensive care Pulsed Doppler Spectral analysis Thermodilution Ultrasound Ventilated patients |
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