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The application of doppler ultrasound to the study of fetal blood flow in perinatal medicine.
| Content Provider | CiteSeerX |
|---|---|
| Author | Stuart, B. Fitzgerald, D. E. Gray, P. |
| Abstract | Continuous wave (C/W) Doppler ultrasound is a non-invasive and inexpensive method of assessing both the fetal circulation in utero and the cerebral circulation of the newborn. We have used spectrum analysed C/W Doppler signals to study the feto-placental circulation in utero and the cerebral circulation of the new born particularly in relation to the development of intraventricular haemorrhage ( I V H). In normal pregnancy umbil ical arterial blood flow was found to be continuous with a significant diastolic flow component, indicating that placental vascular resistance was low. Analysis of the ratio of peak systolic flow (A) to end diastolic flow (B) at various gestat-ional ages showed that there was a progressive fall in placental resistance with advancing gestational age ( I). The mean A/B ratio at 16 weeks (5.3,SD+I.I) was significantly different (P<0.001) from that obtained at term (2. I.SD = 0.3). Fetal blood velocity waveform analysis in cases of retarded |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Doppler Ultrasound Perinatal Medicine Fetal Blood Flow Cerebral Circulation Feto-placental Circulation Fetal Circulation Fetal Blood Velocity Waveform Analysis Placental Resistance Gestational Age Peak Systolic Flow Intraventricular Haemorrhage Progressive Fall Sd I.i Placental Vascular Resistance Significant Diastolic Flow Component Inexpensive Method Diastolic Flow Mean Ratio Various Gestat-ional Age Doppler Signal Continuous Wave |
| Content Type | Text |
