Comparison of noninvasive cardiac output measurements by transthoracic bioimpedance, partial carbon dioxide rebreathing, and transesophageal echocardiography with the thermodilution technique in beagle dogs

Comparison between two methods for cardiac output measurement in propofol‐anesthetized dogs: thermodilution and Doppler

“…This author asserted that the correlation increased with operator experience. According to the scale proposed by Santos (2007) for Pearson's correlation coefficient, the r-value registered by Yamashita et al (2005) and Freund (1987) indicated strong positive correlation, as observed in this study for CO DP and CO TD . So, considering only this analysis, it is possible to suggest that CO DP was a viable non-invasive method for determining CO.…”

“…The r 2 reported by Lazic et al (2003) was higher than observed in this study when analyzing CO DA . Yamashita et al (2005) obtained a correlation coefficient of 0.684 when comparing CO TD with transthoracic bioimpedance, and concluded that this method underestimated CO in sevoflurane anesthetized dogs.…”

“…Yamashita et al (2005) obtained a correlation coefficient of 0.991 between thermodilution and TED, and concluded that TED is a viable noninvasive method for determining CO in sevoflurane anesthetized dogs. Freund (1987) reported an average correlation of 0.85 and concluded that TED had a high correlation with thermodilution.…”