ABSTRACT

Background: Doppler ultrasonography velocimetry of the fetal vessels is a well-known method for the evaluation of fetal well-being, especially in the assessment of small-for-gestational-age (SGA) fetuses at risk of adverse perinatal outcome. This study aimed to determine the Umbilical and Middle Cerebral Arteries mean Doppler indices values in the second and third trimester of normal singleton pregnancies among Yoruba women in Lagos, Lagos State, Nigeria. Materials and methods: A prospective cross-sectional research design was adopted in this study. Transabdominal color Doppler ultrasound was performed on each participant in the semi-recumbent position with a slight lateral tilt using a curved array 3.5-5.0MHz transducer to generate the umbilical and middle cerebral arteries Doppler indices by the researchers. Anthropometric variables were measured. Descriptive and inferential statistics were used for statistical analysis of the data. Results: The Umbilical artery (UA) Doppler indices are (PI= 1.314 ± 0.6575, RI = 0.7125± 0.167, and S/D ratio =3.07± 0.925). The Middle Cerebral artery (MCA) Doppler indices are (PI= 2.170 ± 1.631, RI = 0.8590± 0.4035 and S/D ratio = 4.14 ± 2.083). There were weak and negative statistically significant correlations between gestational age and umbilical artery Doppler indices (PI[r= -0.239, p = 0.001], RI [r= -0.297, p = 0.000] and S/D ratio [r= -0.470, p = 0.000]. There were weak and negative non-statistically significant correlations between gestational age and umbilical artery Doppler indices (PI[r= -0.022, p= 0.760], RI [r= -0.114, p = 0.106]. Conclusion: Normal mean values for the Doppler indices for UA and MCA of the Yoruba ethnic group in Lagos State have been determined. The Doppler indices decrease with increased gestational age. Both maternal age and body mass index have an influence on the Doppler indices of UA and MCA. Keywords: Doppler indices, umbilical artery, uterine artery
Publication date: 01/11/2021

https://ijbpas.com/pdf/2021/November/MS_IJBPAS_2021_6230.pdf

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https://doi.org/10.31032/IJBPAS/2021/10.11.6230