Factors influencing abnormal umbilical artery blood flow S/D ratio and their effect on perinatal outcomes

Abstract

Objective To explore the factors influencing abnormal S/D ratio of umbilical artery blood flow and their effect on perinatal outcomes. Methods From January, 2017 to December, 2018, 50 pregnant women with abnormal umbilical artery blood flow (a study group) and 50 healthy pregnant women (a control group) were selected, and the clinical data were collected. The factors influencing abnormal S/D ratio of umbilical artery blood flow and their effect on perinatal outcomes were analyzed. Results There were statistical differences in hypertension disease, gestational diabetes mellitus, placenta thrombosis, abnormal umbilical cord (twining and torsion), and low fetal weight between the two groups (all P<0.05). The perinatal asphyxia rate, growth limiting rate, premature birth rate, and mortality in the study group were 30.00%, 16.00%, 28.00%, and 6.00%, which were significantly higher than those in the control group (12.00%, 4.00%, 28.0%, and 0.00%), with statistical differences in perinatal asphyxia rate, growth limiting rate, and premature birth rate (all P<0.05). Conclusion Hypertensive disorder complicating pregnancy, gestational diabetes mellitus, thrombus formation of placenta, abnormal umbilical cord (twining, torsion), and low fetal weight are all influential factors of abnormal umbilical artery blood flow S/D ratio, and at the same time increase the perinatal asphyxia, growth limiting rate, premature birth rate, and mortality, and affect the growth and development. Key words: Abnormal S/D ratio of umbilical artery blood flow; Perinatal; Outcomes