Clinical Analysis Of Cervical Canal Length And Pregnancy Outcomes In Preterm Premature Rupture Of Membranes:A Report Of 83 Cases

Objective: To investigate the clinical value of measuring cervical canal length in preterm premature rupture of membranes.Methods: The clinical data of 83 patients with preterm premature rupture of membranes delivered in our hospital between June 2016 and 2017 December were retrospectively analyzed.Based on the measured cervical canal length,the patients were divided into cervical canal length > 25 mm group(group A),cervical canal length within 15-25 mm group(group B)and cervical canal length < 15 mm(group C).Duration from rupture of membranes to giving birth,incidence of membranitis,rate of maternal clinical infection,rate of neonatal infection and rate of surgical delivery were compared among the 3 groups,to investigate the correlations of different cervical canal lengths with giving birth,infection and dystocia.Results: 1.Maternal age,gestational weeks when rupture of membranes,and incidence of dystocia showed no statistically significant differences among the 3 groups(P > 0.05).incidence of complications of pregnancy(Gestational diabetes、Pregnancy induced hypertension、Pregnancy with uterine scar、Torsion of umbilical cord、Multiple pregnancy and Oligohydramnios)showed no statistically significant differences among the 3 groups(P > 0.05).2.Incubation period of the 3 groups presented statistically significant differences(P < 0.05).Moreover,with the shortening of cervical canal length in preterm premature rupture of membranes,the incubation period shortened.3.Incidence of membranitis,rate of maternal clinical infection and rate of neonatal infection in the 3 groups demonstrated statistically significant differences(P < 0.05).The rate of infection in the group A was lower than that in the group B and group C.Conclusion: 1.Short cervical canal length in preterm premature rupture of membranes is correlated with early giving birth.It has certain guiding significance for the use of tocolysis in clinical work and the timing of fetal lung maturation.2.The rate of maternal and infant infection in preterm premature rupture of membranes increases with the shortening of cervical canal length.Intrauterine infection can also shorten the cervical canal;therefore,measuring cervical canal length may be a means of monitoring intrauterine infection.3.Cervical canal length after preterm premature rupture of membranes does not affect final delivery mode and has no predictive value for dystocia.In clinical work,we should choose the optimal delivery mode for patients with preterm premature rupture of membranes based on the comprehensive consideration of clinical practice.