EP17.19: Predictive value of the risk of premature delivery by ultrasonographic measurement of cervical length

To evaluate the effectiveness of measuring the length of the cervical canal of the cervix by ultrasound in predicting spontaneous preterm delivery. This was a retrospective study of all women hospitalised for preterm labour with intact membranes and gestational age was between 28 and 34 weeks of amenorrhea (SA) determined by the date of last menstrual period and confirmed by ultrasound in the first quarter. Rimmed patients, patients who have not had ultrasonographic measurement of cervical length when admitted and the patients for whom prematurity was induced before 34 weeks were excluded. The cervical length threshold values less than 20 and 30mm respectively had a sensitivity of 38% and 88%, a specificity of 50% and 15%, a positive predictive value (PPV) of 30% and 42% and a negative predictive value (NPV) of 70% and 90% for the occurrence of delivery before 34 weeks of gestation. Our findings suggest that cervical length is not predictive of the risk of preterm delivery in symptomatic pregnancies with preterm labour. The interest of this review lies in its high VPN, to reassure the patient and avoid prolonged hospitalisations.