Ultrasonographic Estimation Of Fetal Gestational Age By Fetal Kidney Length, In Tertiary Care Centre Gwalior
Journal Title: National Journal of Medical and Dental Research - Year 2018, Vol 6, Issue 4
Abstract
In this study we evaluated ultrasonographically the kidney length for the assessment of gestational age and foetal growth and to compare this parameter with other routinely used parameters such as the BPD, FL. This cross-sectional study was done with 100 pregnant women with low risk pregnancy, ranging from 18-40 weeks of gestation at the Department of Radiodiagnosis and Department of Anatomy, G.R. Medical College, Gwalior (M.P.). The period of gestation was calculated by LMP and clinical examination. Further, for all these patients several geometric parameters i.e. biparietal diameter, femur length and kidney length were obtained and compared. The coefficient of correlation: BPD (R 2 =0.988, p value < 0.01) and SL (R 2 =0.962, p value < 0.001) were observed in the present study. They showed high degree of linear progressive relationship with gestational age. In situations where head shape is altered significantly, such as in breech presentation or transverse like, FL measurement offers better correlation than BPD. Femur length is very reliable and consistent marker of gestational age even when BPD cannot be relied upon, as in late third trimester, after the head is engaged and in cases of hydrocephalus, ancephaly and dolichocephaly. A statistically significant positive correlation was found between the kidney length and gestational age (R2=0.962) indicating it to be a reliable indicator of gestational age especially towards the third trimester. As kidney length is independent of foetal head, it can be a useful alternative parameter in conditions where the foetal head is not accessible as in third trimester deeply engaged head or when head is deformed due to overcrowding such as in multiple pregnancy. It is useful in conditions of femur length deformities along with skull deformity like achondroplasia etc.
Authors and Affiliations
Reeta Kushwah, Naveen Kushwah
Keywords
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