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Examination of a low‐cost pocket Doppler device for fetal assessment
Author(s) -
Lockett M.,
Bisits A.,
Giles W.B.
Publication year - 1998
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.1998.11010044.x
Subject(s) - medicine , umbilical artery , polyhydramnios , doppler effect , diastole , obstetrics , ultrasound , waveform , cardiology , fetus , pregnancy , radiology , blood pressure , genetics , physics , quantum mechanics , astronomy , voltage , biology
The objective of this study was to evaluate a pocket Doppler device (Multi Dopplex II) for the waveform analysis of umbilical artery systolic/diastolic (S/D) ratios and resistance index (RI). A prospective, paired study was undertaken in a perinatal ultrasound unit in a tertiary referral hospital. Forty‐three high‐risk pregnant women beyond 16 weeks' gestation had fetal umbilical artery flow velocity waveforms recorded with both Multi Dopplex II and duplex Doppler devices and the waveform analyses were calculated. The Multi Dopplex II falsely indicated absent diastolic flow in two cases and failed to produce a flow velocity waveform in the presence of maternal obesity, poly‐hydramnios and some cases of anterior placenta ( n = 8). As well as this, the limits of agreement overall for both S/D ratio and RI were wide (for S/D ratio, −1.6 to 2.2 and for RI, −0.20 to 0.20). Even though the levels of agreement were better for the third trimester (for S/D ratio, −0.8 to 1.1 and for RI, −0.10 to 0.20), we concluded that the limits of agreement were too wide for clinical use. Copyright © 1998 International Society of Ultrasound in Obstetrics and Gynecology