What question did this study set out to answer?

To evaluate cardiac output measured by an oesophageal Doppler device against thermodilution and assess the correlation between Doppler minute distance and thermodilution cardiac output in anesthetized dogs.

April 24, 2015Journal of Small Animal Practice

Evaluation of an oesophageal Doppler device for monitoring cardiac output in anaesthetised healthy normotensive dogs

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Authors

SCSusana CanfránUniversidad Complutense de Madrid RCRafael CedielUniversidad Complutense de Madrid ISIgnacio SándezUniversidad Europea

Discussion

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Implication

Prospective experimental study shows unacceptable agreement between esophageal Doppler and thermodilution cardiac output in anesthetized dogs, indicating Doppler cannot replace the standard.

Key Points

To evaluate cardiac output measured by an oesophageal Doppler device against thermodilution and assess the correlation between Doppler minute distance and thermodilution cardiac output in anesthetized dogs.
Conducted a prospective experimental study in six healthy adult beagle dogs (N=6).
Premedicated dogs with acepromazine and methadone, induced with propofol, maintained with isoflurane, and administered dopamine (3 µg/kg/min) to prevent hypotension.
Assessed minute distance, Doppler cardiac output, and thermodilution cardiac output across three end-tidal isoflurane concentrations (1.0%, 1.3%, and 2.0%).
Correlation between Doppler and thermodilution cardiac output was moderately good (r² = 0.582).
Correlation between Doppler-derived minute distance and thermodilution cardiac output was moderately good (r² = 0.658).
Limits of agreement between Doppler and thermodilution cardiac output reached ±39%, exceeding the acceptable clinical threshold of up to ±30%.

Cite This Study

Canfrán et al. (2015) studied this question.

synapsesocial.com/papers/6a71a048e36a167817e363cf https://doi.org/10.1111/jsap.12362

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Implication

Prospective experimental study shows unacceptable agreement between esophageal Doppler and thermodilution cardiac output in anesthetized dogs, indicating Doppler cannot replace the standard.