Intraoperative assessment of the Lawrence 3000 Doppler Cardiac Output Monitor.
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.
Stein
M S
MS
Department of Anaesthesia and Pain Management, Royal North Shore Hospital, Sydney, New South Wales, Australia.
Barratt
S M
SM
Purcell
G J
GJ
D002302:Cardiac Output / Q000502:physiology*; D006348:Cardiac Surgical Procedures; D015150:Echocardiography, Doppler / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D006801:Humans; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D013815:Thermodilution