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Korean Journal of Obstetrics & Gynecology 1999;42(10):2341-2347.
Published online January 1, 2001.
Diagnostic and Prognostic Value of Umbilical and Descending Thoracic Aorta Velocimetry.
Jae Kwan Lee, Jun Young Hur, Ho Suk Saw, Yong Kyun Park, Soo Yong Chough
Abstract
OBJECTIVES
Early diagnosis of intrauterine growth retardation is important to ensure optimal monitoring and delivery with the introduction of real-time and Doppler ultrasound systems, a noninvasive method of measuring human fetal blood flow has become available. The aim of this study is to compare blood flow velocity waveforms at the fetal descending aorta and umbilical artery in normal and in patients with pregnancy induced hypertension. METHODS: Using a combination of linear array real-time and pulsed Doppler ultrasound, blood flow velocity measurements were carried out at the fetal descending aorta and umbilical artery in 35 normal pregnancies and 18 cases of pregnancy induced hypertensive patients. RESULTS: The mean systolic/diastolic ratio of umbilical artery and aorta was significantly higher in PIH patients than in normal pregnancies(3.8 +/- 0.81 versus 2.97 +/- 0.52, p<0.05) and to predict perinatal morbidity, umbilical velocimetry is more sensitive than that of descending thoracic aorta. CONCLUSION: This study suggests that umbilical artery velocimetry could be used as a marker to predict adverse perinatal outcome.
Key Words: Doppler velocimetry, umbilical artery, thoracic aorta
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