Why the study?
Does transoesophageal Doppler cardiac output measurement agree with the thermodilution method in patients undergoing elective cardiac surgery?
Does transoesophageal Doppler cardiac output measurement agree with the thermodilution method in patients undergoing elective cardiac surgery?
The Lawrence 3000 transoesophageal Doppler cardiac output monitor does not agree with the standard thermodilution method for measuring cardiac output during elective cardiac surgery.
Clinicians should not substitute Doppler for thermodilution cardiac output; leaves open need for further validation studies.
Transoesophageal Doppler cardiac output measurement was evaluated against the thermodilution method in eleven patients undergoing elective cardiac surgery. A total of 106 pairs of Doppler and thermodilution values were obtained. Cardiac output was measured over a range of 2.3 l.min-1. to 11.51 l.min-1. The mean difference between the Doppler and thermodilution measures was -1.0 l.min-1 (thermodilution minus Doppler). Standard deviction was 1.8 l.min-1. This is a significant difference. It is concluded that these techniques do not agree when measuring cardiac outputs.
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Stein et al. (1991) studied this question.
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