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Precision of umbilical artery Doppler studies. Intraobserver, interobserver, and biologic variability of fetal Doppler velocimetry.
Author(s) -
Thomas R L,
Peng T C,
Eglinton G S,
Strobino D M,
Johnson T R
Publication year - 1991
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.1991.10.4.201
Subject(s) - medicine , doppler effect , velocimetry , umbilical artery , doppler ultrasound , laser doppler velocimetry , ultrasound , blood flow , waveform , radiology , fetus , pregnancy , physics , quantum mechanics , astronomy , voltage , biology , optics , genetics
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.