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  • Title: A preliminary study of fetal ductus venosus blood flow during the first stage of labor.
    Author: Krapp M, Denzel S, Katalinic A, Berg C, Germer U, Gembruch U.
    Journal: Arch Gynecol Obstet; 2002 Nov; 267(1):19-22. PubMed ID: 12410368.
    Abstract:
    OBJECTIVE: The measurement of fetal ductus venosus blood flow during labor by means of color Doppler sonography. METHODS: 26 women between 37 and 41 weeks of gestation were included in the study. At various stages of cervical dilation (<2 cm, 2-4 cm, 6- 8 cm, and fully dilated) blood flow velocity waveforms of the fetal ductus venosus during and between contractions were studied in fetuses with a negative non-stress test. The Pulsatility index for veins (PIV) and the Peak velocity index for veins (PVIV), respectively were calculated off-line. The mean+/-standard deviation between and during contractions were determined for descriptive analysis. RESULTS: Waveforms were visualized during 139 contractions and 159 episodes of uterine relaxation in 24 of 26 fetuses (92.3%) in normal labor. Three and more waveforms were recorded, in 59.0% during contractions (82/139) and in 57.9% between contractions (92/159), respectively. The mean PIV and PVIV values during contractions were 1.68+/-1.02 and 1.46+/-0.72, respectively. Between contractions the values were 0.49+/-0.21 for the PIV and 0.44+/-0.18 for the PVIV, respectively. CONCLUSION: Ductus venosus blood flow can be visualized in labor. Further studies are needed to establish normal values.
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