Abstract
Aims
Fetal growth restriction (FGR) may go undetected in the antenatal period with subjective clinical evaluation, and there is a growing propensity to perform a third-trimester scan, especially in the developed countries. The literature on the importance of the same in developing countries like ours, is scant. Hence, this study was undertaken to evaluate the role of routine third-trimester ultrasonography along with Doppler in predicting adverse perinatal outcome.
Methods
A prospective cohort study was conducted at a tertiary-care hospital, in which routine third-trimester ultrasonography was performed for 265 antenatal women, and included estimation of amniotic fluid index (AFI), estimated fetal-weight (EFW), and cerebroplacental ratio (CPR). Women were categorized as having normal parameters or having at least one abnormal parameter. Post-natal adverse perinatal outcomes including low birth-weight, hypoglycemia, poor Apgar scores, prolonged hospital stay, need for ventilatory support, neonatal asphyxia, neonatal sepsis and early neonatal death were recorded. Prediction analyses for sensitivity, specificity, positive and negative predictive values were done. Receiver Operating Characteristic (ROC) curves were plotted for threshold for each parameter for adverse outcome.
Results
Out of 260 women that were analyzed, 47.5% had no clinically identifiable risk factors, and 52.5% had at least one abnormal parameter. Sensitivity and negative predictive value for adverse outcome were highest for composite ultrasound finding (85.4% and 90.4% respectively). Specificity, positive predictive value and diagnostic accuracy were highest for CPR (97.8%, 86.7% and 76.9% respectively).
Conclusion
Routine third trimester ultrasonography, including Doppler, can help in risk-stratification of otherwise clinically low-risk pregnancies.
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Data availability
Data is available with the corresponding author on request.
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All authors contributed to study design and concept. PD wrote the first draft of the manuscript. All authors helped in data collection and preparation of the final manuscript to be submitted. The manuscript has been read and approved by all the authors, the requirements for authorship as stated earlier in this document have been met, and each author believes that the manuscript represents honest work.
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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Institute Ethics Committee of All India Institute of Medical Sciences, Bhubaneswar reference number IEC/AIIMS BBSR/PG Thesis/2018- 19/36 dated.
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Dasgupta, P., Singh, S., Begum, J. et al. Routine third trimester ultrasonography in predicting adverse perinatal outcomes: a prospective cohort study at a tertiary-care hospital in Eastern India. J Ultrasound 26, 777–784 (2023). https://doi.org/10.1007/s40477-022-00753-5
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DOI: https://doi.org/10.1007/s40477-022-00753-5