Reproducibility of linear cardiac output measurement by doppler ultrasound alone

作者: F M McLennan , N E Haites , J D Mackenzie , M K Daniel , J M Rawles

DOI: 10.1136/HRT.55.1.25

关键词:

摘要: Inclusion of a pig aorta in an artificial circulation with pulsed blood flow allowed correlation minute distance, measured the by Doppler ultrasound, and absolute flow, timed blood-volume collection. The coefficient was 0.99 standard error prediction that 5.4% distance predicted at rate 5 litres per minute. horizontal between 95% confidence limits for single expressed as percentage 33%, this corresponded to range rates 1.65 could give rise same measurement. In 142 patients duplicate measurements were made repositioning ultrasound transducer recordings. mean difference paired readings, average (SD) each pair 5.4 (4.7)%. Thus, non-invasive measurement linear cardiac output is similarly reproducible vitro vivo compares favourably volumetric thermodilution.

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