Precision of umbilical artery Doppler studies. Intraobserver, interobserver, and biologic variability of fetal Doppler velocimetry.
RL Thomas, TC Peng, GS Eglinton… - Journal of ultrasound …, 1991 - Wiley Online Library
Journal of ultrasound in medicine, 1991•Wiley Online Library
The use of Doppler ultrasound to study fetal blood flow has become commonplace, despite
the lack of detailed evaluation of the testing tool for precision. In evaluation of 25 patients, no
significant intraobserver differences were found between readings on an individual
waveform, nor were there significant differences between different observers on individual
waveforms. Temporally separated waveforms within a 30‐minute window gave the greatest
variation. A multi‐way analysis of variance noted significant differences in this category only …
the lack of detailed evaluation of the testing tool for precision. In evaluation of 25 patients, no
significant intraobserver differences were found between readings on an individual
waveform, nor were there significant differences between different observers on individual
waveforms. Temporally separated waveforms within a 30‐minute window gave the greatest
variation. A multi‐way analysis of variance noted significant differences in this category only …
The use of Doppler ultrasound to study fetal blood flow has become commonplace, despite the lack of detailed evaluation of the testing tool for precision. In evaluation of 25 patients, no significant intraobserver differences were found between readings on an individual waveform, nor were there significant differences between different observers on individual waveforms. Temporally separated waveforms within a 30‐minute window gave the greatest variation. A multi‐way analysis of variance noted significant differences in this category only. This study confirmed the precision of measurements by a single observer and between observers. Only biological alterations over time displayed significant variability.
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