PMID: 15222517Jun 30, 2004Paper

Validity of antenatal diagnosis of intrauterine growth restriction by umbilical Doppler waveform index

Journal of the Medical Association of Thailand = Chotmaihet Thangphaet
Pharuhas ChanprapaphSitthicha Siriaree

Abstract

To evaluate the validity of systolic/diastolic (S/D) ratio of the umbilical artery in predicting intrauterine growth restriction (IUGR). Diagnostic test study. Maharaj Nakorn Chiang Mai Hospital, Chiang Mai University. Two hundred and twelve singleton pregnancies between 30 and 42 weeks' gestation with clinical suspicion of IUGR were recruited and followed-up between December 1st 1995 and June 30th 1998. They were sonographically examined for routine fetal biometry and S/D ratio of umbilical artery Doppler waveform measurement within 14 days of delivery. All of them had an accurate date of last menstrual period and were between 30-42 weeks' gestation. The umbilical artery S/D ratio was obtained by the same experienced sonographer, using the same ultrasound machine, Aloka 680EX, (Tokyo, Japan). The S/D ratio of 3 or greater was considered abnormal, predicting IUGR prenatally for every gestational week. IUGR was defined as low birth weight of less than the 10th percentile of the standard birth weight curve of Maharaj Nakorn Chiang Mai Hospital. Sensitivity specificity positive predictive value and negative predictive value. The prevalence of IUGR among the study group was 50.9%. The S/D ratio of 3 or greater for predicting of IUG...Continue Reading

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