Part Of Isolated Polyhydramnios Can Be Explained By Renal Artery Doppler: A Prospective Case-Control Study

INTRODUCTION: To investigate the effect of renal artery Doppler (RAD) parameters on the increase in fetal urine production and identify potential associations with isolated polyhydramnios.
METHODS: This prospective case-control study was conducted at a single tertiary center. A total of 84 patients were included. Patients were grouped into patients with polyhydramnios and patients with normal AFI. RAD parameters were evaluated for each patient.. Spearman correlation coefficient was used. The “ROC” curve was used to determine the cut-off value for predicting isolated polyhydramnios.
RESULTS: A significant difference was observed in the systolic/diastolic ratio between the isolated polyhydramnios group and the control group (p=0.03). The cut-off value for renal artery S/D ratio in predicting isolated polyhydramnios was determined as 4.96 with 73% sensitivity and 58% specificity. In spearman correlation test, S/D ratio showed a moderate positive correlation with AFI.
DISCUSSION AND CONCLUSION: Isolated polyhydramnios is correlated with S/D, one of the RAD parameters. Based on the S/D ratio, we can say that isolated polyhydramnios is of renal origin.