Transvaginal pulsed Doppler velocimetry in fetal arteries
✍ Scribed by J. Deutinger; R. Rudelstorfer; P. Häusler; G. Bernaschek
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 478 KB
- Volume
- 246
- Category
- Article
- ISSN
- 0003-9128
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Pulsed ultrasonic Doppler velocimetry (20 MHz) (PUDVM) has evolved considerably in the last 10 years. Engineering development has resulted in a computer-controlled vessel-scanning instrument whose backscattered frequency shift spectra are analyzed using fast Fourier transforms (FFT). Benchtop and th
In a cross-sectional study, umbilical artery velocity waveforms were re- corded in 214 low-risk pregnancies a t 7 weeks to 16 weeks, menstrual age, by means of transvaginal color and pulsed Doppler ultrasonography. In all the cases studied, end diastolic velocities were absent until the 10th week. F