Prediction of small for gestational age newborns using ultrasound estimated and actual amniotic fluid volume: Published data revisited

S.P. Chauhan, Pat Magann, Dorota Doherty, C.S. Ennen, A. Niederhauser, J.C. Morrison

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    5 Citations (Scopus)

    Abstract

    Background: Intrauterine growth restriction (IUGR) is a complex problem in modern obstetrics. The presence of oligohydramnios is reported as an important diagnostic and prognostic factor in the management of a pregnancy complicated by IUGR.Aim: To determine the predictive accuracy of sonographic and actual amniotic fluid volume (AFV) to identify small for gestational age (SGA; birthweight < 10%).Methods: Before amniocentesis, the single deepest pocket (SDP) and amniotic fluid index (AFI) were obtained. The AFV was determined using a diazo-dye reaction. Thresholds for AFI, SDP and AFV were estimated using receiver-operating curves analysis and areas under the curves were used to assess predictive accuracy of these indices. Likelihood ratios (LR) were obtained.Results: Among the 175 newborns, 16% had SGA. Compared to newborns with birthweight > 10%, all AFV indices were significantly lower (P = 0.001, P = 0.001 and P = 0.009 for AFI, SDP and AFV respectively) for SGA. The areas under the curves for all curves < 0.65 and the LR for all thresholds were < 5.0, reflecting poor diagnostic capabilities.Conclusions: Despite observed lower AFV indices in SGA, neither sonographic examination nor determination of AFV is a reliable predictor of suboptimal growth.
    Original languageEnglish
    Pages (from-to)160-164
    JournalAustralian and New Zealand Journal of Obstetrics and Gynaecology
    Volume48
    Issue number2
    DOIs
    Publication statusPublished - 2008

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