[PI index value in fetal ductus venosus blood flow at 11-14 weeks in normal course of pregnancy].

OBJECTIVE: Development of ultrasound diagnostic with Doppler examination allows early and and more precise assessement of fetal anatomy and well-being. DESIGN: Evaluation of blood flow parameters in fetal ductus venosus between 11 and 14 weeks of pregnancy was performed. MATERIAL AND METHODS: Fetal anatomy, nuchal translucency, nasal bone and ductus venosus blood flow has been studied with transabdominal probe in 225 consecutive fetuses according to Fetal Medicine Foundation recommendations. RESULTS: From total number of 225 cases finally ten women were excluded from analysis due to absent or reversed A-wave in DV blood flow. In remaining 215 cases mean value of PI was 0,94 (range 0,53-1,88), mean value of Vmax (S-wave) was 42,48cm/s (range 18,7-102,9cm/sek), and mean value of Vmin (A-wave)--11,91cm/s (range 1,13- 37,32 cm/sek). CONCLUSIONS: PI index value slightly decreased with increasing CRL. There was no differences in mean blood flow velocity with CRL for S-wave. A decrease in mean blood flow velocity with CRL was noted for A-wave.