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

Cardiac index by thermodilution or transthoracic echocardiography in dogs at different hemodynamic states

“…In this study, the same method that exhibited excellent accuracy in the study of LOPES et al (2010) did not demonstrate satisfactory results. This discrepancy can be attributed to the difficulty in performing the examinations, which led to the low accuracy observed.…”

“…DAY et al (2007) reported that the mean differences varied between -0.47 and 0.35Lmin -1 depending on the region in which the flow rate was measured (aorta or pulmonary); however, these differences exhibited large deviations, which increased the agreement intervals and indicated a low agreement with TD. By contrast, LOPES et al (2010) reported with the measurement of CO by analysis of the pulmonary valve was more accurate, with a mean difference of -0.04Lmin and an error percentage of 54% in the analysis of the aortic valve. Authors reported that the divergence of data in the literature is due to differences in the level of experience of the examiner as well as the degree of reliability in evaluating the ultrasound views of the ventricular outflow area in question.…”

“…The methodologies used in this study and in the studies of DAY et al (2007), LOPES et al (2010), and PARK et al (2012 a particular clinical condition. Moreover, the present study observed the best results in the hypodynamicstate, possibly owing to ease identification of cardiac structures due to decreased heart rate.…”

“…In the available literature, the P-VTI method is considered the most accurate compared with TD; whereas, A-VTI did not exhibit adequate agreement (DAY et al, 2007;LOPES et al, 2010). Furthermore, Simpson's method appeared to be worse than the out flow methods (PARK et al, 2012).…”

“…LOPES et al (2010) reported a high correlation and adequate agreement between TD and transthoracic echocardiography using the VTI method in the pulmonary valve of dogs anesthetized with propofol, emphasizing the need to use accurate equipment and a trained operator to decrease variations and errors. However, the absence of hemodynamic interventions was one of the limitations of the study.…”