Akademik Veri Yönetim Sistemi
Sabiad , cilt.6, sa.1, ss.10-16, 2023 (Hakemli Dergi)
Objective: The fetal basilary artery Doppler (BA-D) measurements could be an easier alternative method to middle cerebral artery Doppler at the first trimester for the prediction of early fetal anemia. Our aim is to test its feasibility and construct reference ranges of BA-D at the first trimester Materials and Methods: The study was analyzed retrospectively by using a transabdominal Doppler ultrasound which measured the fetuses at a crown-rump length (CRL) ranging from 45 to 81mm in 145 singleton pregnancies at the first trimester. The BA was imaged in the midsagittal plane, the pulse Doppler was placed just caudal to the anterior echogenic line of the brainstem, and the insonation angle was kept below 30°. The pulsatility index (PI) and peak systolic velocity (PSV) were also measured. Results: A total of 138 out of the 145 fetuses were included. The mean CRL was 60.5±10.6 mm (range: 45-81mm). The mean nuchal translucency (NT) was 1.51±0.46 mm. The PI and PSV varied significantly, with the gestational age, CRL, NT, biparietal diameter (p < 0.05), and regression models being constructed for each variable. The 5th, 50th, and 95th percentiles for the BA PI and PSV Doppler measurements at each gestational week were determined. Intraclass correlation coefficient for the BA PI and PSV measurements were 0.792 (95% CI=0.661-0.876; p<0.01) and 0.457 (95% CI=0.208-0.650; p<0.01), respectively. Conclusion: The BA PI and PSV values were determined during the first trimester sonography of healthy fetuses. Intraobserver reproducibility is acceptable for BA and should be supported by new studies for its use in the diagnosis of early fetal anemia.