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Evaluation of an oesophageal Doppler device for monitoring cardiac output in anaesthetised healthy normotensive dogs
Author(s) -
Canfrán S.,
Cediel R.,
Sández I.,
CaroVadillo A.,
Gómez de Segura I. A.
Publication year - 2015
Publication title -
journal of small animal practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 67
eISSN - 1748-5827
pISSN - 0022-4510
DOI - 10.1111/jsap.12362
Subject(s) - medicine , acepromazine , cardiac output , anesthesia , isoflurane , beagle , propofol , hemodynamics , cardiology , heart rate , blood pressure
OBJECTIVES To compare cardiac output measured by oesophageal Doppler and by thermodilution monitoring and to correlate the Doppler cardiac output‐generated minute distance with thermodilution cardiac output in healthy anaesthetised beagle dogs. MATERIALS AND METHODS Prospective experimental study. Six healthy adult beagle dogs were pre‐medicated with intramuscular acepromazine (0 · 05 mg/kg) and methadone (0 · 3 mg/kg). Anaesthesia was induced with intravenous propofol (dose‐effect) and maintained with isoflurane in oxygen. Simultaneously, a constant rate infusion of dopamine (3 µg/kg/minute) was administered to the dogs to prevent hypotension. The minute distance, Doppler and thermodilution cardiac outputs were assessed at three different end‐tidal concentrations of isoflurane (1 · 0, 1 · 3 and 2 · 0%). RESULTS Correlation between Doppler and thermodilution cardiac output (r 2 = 0 · 582) and between minute distance and thermodilution cardiac output (r 2 = 0 · 658) were moderately good, but the limits of agreement between Doppler and thermodilution cardiac outputs were above the recommended values (±39%, for a recommended value up to 30%). CLINICAL SIGNIFICANCE Doppler and minute distance cannot be considered as an alternative method to thermodilution to monitor cardiac output in the healthy anaesthetised dog.