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- W2081734589 abstract "Knowledge of umbilical venous volume flow is important to discriminate between normal and abnormal fetal development. It is generally accepted that accurate assessment of umbilical blood flow is of the utmost importance. A wide range of gestational age releated volume flow data has been reported. To compare umbilical venous volume flow derived from color Doppler cineloops and volume flow derived from conventional spectral Doppler recordings. Colour Doppler cineloops of the free-floating loop of the umbilical cord were obtained with the Philips ATL HDI 5000 in 16 normal pregnancies between 20 and 40 weeks of gestation. Color Doppler mode is used to find the maximum velocity in the umbilical vein. A cineloop was recorded and the sample volume was placed in the spot showing the highest velocity. Peak velocity from the spectral Doppler recording was determined using High Q. Peak velocity from the colour Doppler cineloop was determined within a marked region using the research tool HDI_Lab. The cross sectional area of the umbical vein was determined using B-mode imaging and subsequently umbilical volume flow was calculated. Assuming a parabolic flow profile in the umbilical vein, the mean velocity is equal to half the peak velocity. The colour Doppler derived mean velocity of 59 (SD ± 10.8) mm/s is significantly (P = 0.04) higher than the spectral Doppler derived velocity of 54 (SD ± 9.5) mm/s. Umbilical blood flow derived from the mean flow multiplied by the cross sectional area is 114 ml/min (SD ± 69) and 104 ml/min (SD ± 58), respectively (P = 0.01) (student t test). These preliminary data suggests that colour Doppler derived umbilical venous volume flow is approximately 10% higher than spectral Doppler derived volume flow. This can be explained by less angle dependency of colour Doppler derived velocity." @default.
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- W2081734589 date "2004-08-01" @default.
- W2081734589 modified "2023-10-16" @default.
- W2081734589 title "P07.04: Comparison between colour Doppler-and spectral Doppler derived peak velocity in the umbilical vein" @default.
- W2081734589 doi "https://doi.org/10.1002/uog.1452" @default.
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