IntroductionConservative treatments with latency period have been used for the treatment of preterm premature rupture of membranes (PPROM) in clinical practice, we aimed to evaluate the role and potential influencing factors of latency period, to provide insights to the clinical treatment of PPROM.Material and methodsPPROM pregnant women treated in our hospital from January 1, 2015 to September 30, 2020 were included. PPROM patients were divided into 48～168h group and the >168h latency group, the characteristics and prognosis of this two groups were compared and analyzed. Logistic regression analyses were conducted to analyze the relevant influencing factors of latency period.ResultsA total of 131 PPROM patients were included. There were significant differences on the age, BMI, gestational age on admission, amniotic fluid volume before childbirth, and positive rate of cervical secretion culture between two groups (all p<0.05). Logistic regression analyses indicated that the latency period was shorter in the PPROM patients with age≥30y(OR0.048, 95%CI0.121~0.863) and gestational age≥32w on admission(OR0.463, 95%CI0.069~0.811), and the latency period was prolonged in the PPROM patients with BMI≥23kg/㎡(OR1.591, 95%CI1.134~1.944) and amniotic fluid volume≥6cm(OR2.129, 95%CI1.093~3.042) (all p<0.05). There were significant differences in the incidence of low birth weight and NRDS between 48~168h group and >168h group (all p<0.05).ConclusionsLatency period plays an important role in the PPROM, which is associated with the pregnant women's age, BMI, gestational week of rupture and amniotic fluid index.
120: The role of serial amniotic fluid volume measurements in pregnancies complicated by preterm premature rupture of membranes in predicting neonatal respiratory outcome
