OC07.04: Adjusted cervical length for gestational age as predictor of urgent delivery in pregnancies complicated by placenta previa

Abstract

Oral communication abstracts cases respectively. The cervix was measured using three techniques between the external os (EO) and the internal cervical os (IO) (single straight line, two straight lines, tracing), and the same three techniques between the external os and the lower pole of the egg (LPE). All measurements were repeated to assess the intra and inter operator variability. The value of measurements to predict PTB was compared based on ROC curves. Results: Mean cervical length examined by the single-line, two-lines and trace, from the EO to the IO, approaches were 37.4 mm (+/−3.9 mm), 39.1 mm (+/−4.2 mm), and 39.1 mm (+/−4.3 mm) respectively. Mean cervical length examined by the single-line, two-lines and trace, from the EO to the LPE, approaches were 48.7 mm (+/−7.7 mm), 52.7 mm (+/−8.7 mm), and 54 mm (+/−9.2 mm) respectively. The three methods using the OI were the most useful to predict preterm birth before 34 week's gestation. The most discriminating was the tracing techniques (AUC = 0.85) with a cut off of 37 mm (Se = 87%, Sp = 70%). However intra-and inter-operator agreements were higher with LPE-based methods as compared to IO-based methods. Conclusions: Tracing and single line methods from EO to IO have greater potential to predict preterm birth before 37 weeks' gestation although they have lower reproducibility than LPE-based methods. OC07.02 Clinical significance of the presence of amniotic fluid 'sludge' in asymptomatic patients at low and high risk for spontaneous preterm delivery

Serial Change in Cervical Length for the Prediction of Emergency Cesarean Section in Placenta Previa

“…Another study also argued that a single measurement of CL is not sufficient to predict the outcome [ 13 ]. A recent study showed that CL in women with placenta previa is a useful predictor of emergency CS due to bleeding or labor, and improved its utility by using CL Z -scores adjusted for gestational age [ 17 ].…”