ABSTRACT
RESUMEN Objetivo : Comparar el ángulo uterocervical con la longitud cervical en la predicción de parto pretérmino inminente en pacientes sintomáticas. Diseño : Estudio de casos-controles. Institución. Hospital Central "Dr. Urquinaona", Maracaibo, Venezuela. Participantes : Pacientes con parto pretérmino en los siguientes 7 días (grupo A) y embarazadas con parto pretérmino más allá de los 7 días (grupo B). Métodos : Al momento del diagnóstico, las pacientes fueron evaluadas utilizando ecografía transvaginal y fueron seguidas hasta el parto. Principales medidas de resultado: Características generales, ángulo uterocervical, longitud cervical, parto pretérmino inminente y eficacia pronóstica. Resultados : Se incluyó 326 pacientes: 75 mujeres presentaron parto pretérmino inminente (grupo A) y 251 pacientes fueron consideradas como controles (grupo B). Las pacientes del grupo A presentaron valores significativamente más altos del ángulo uterocervical y más bajos de longitud cervical comparado con las pacientes del grupo B (p < 0,0001). El ángulo uterocervical mostró un valor de área bajo la curva de 0,864, mientras que el valor del área bajo la curva de la longitud cervical fue 0,985. La diferencia de la capacidad de discriminación entre las áreas bajo la curva de cada prueba fue significativa (p < 0,0001). Conclusión : El ángulo uterocervical no es superior a la longitud cervical en la predicción de parto pretérmino inminente en pacientes sintomáticas.
ABSTRACT Objective: To compare the uterocervical angle with the cervical length in the prediction of impending preterm delivery in symptomatic patients. Design: Case-control study. Institution: Central Hospital "Dr. Urquinaona", Maracaibo, Venezuela. Participants: Patients with preterm delivery within 7 days (group A) and pregnant women with preterm delivery beyond 7 days (group B). Methods: At the time of diagnosis, the patients were evaluated using transvaginal ultrasound and were followed until delivery. Main outcome measures: General characteristics, uterocervical angle, cervical length, impending preterm delivery, and prognostic efficacy. Results: 326 patients were included, 75 women presented impending preterm delivery (group A) and 251 patients were considered as controls (group B). The patients in group A had significantly higher values of the uterocervical angle and lower cervical length compared to the patients in group B (p <0.0001). The uterocervical angle showed an area under the curve of 0.864, while the value of the area under the curve of cervical length was 0.985. The difference in the discrimination ability between the areas under the curve of each test was significant (p <0.0001). Conclusion: The uterocervical angle is not greater than the cervical length in predicting impending preterm delivery in symptomatic patients.
ABSTRACT
Objective To explore the possibility and value of the anterior uterocervical angle ( ACA) and cervical length for prediction of preterm birth in second trimester with the transperineal ultrasound . Methods This study retrospectively reviewed the relevant medical records of single birth primiparas undergoing prenatal ultrasonographic evaluation in Wuxi People′s Hospital Affiliated to Nanjing Medical University from January 2016 to December 2016 . The pregnant women were divided into preterm group and term group according to the pregnancy outcomes ( with or without preterm birth) . The ACA and cervical length of these pregnancies were measured in the second trimester ( between 22 -24 weeks gestation) with the transperineal ultrasound . Results A total of 1064 pregnant women were enrolled in the study ,with 84 cases in preterm group ( 78 .9％ ,84/1064) and 980 cases in term group ( 92 .11％ ,980/1064) . Age of women in the two groups had no statistics difference( P =0 .86) . The mean ACA and cervical length of preterm group were ( 112 .48 ± 15 .83)° and ( 30 .94 ± 6 .32) mm ,and the mean ACA and cervical length of term group were (103 .52 ± 13 .78)° and (37 .28 ± 6 .74)mm ,there were statistically difference( P <0 .05) . The area under ROC curve of the ACA was 0 .882 ,of the cervical length was 0 .664 ,the corresponding cutoff value were 113°and 27 mm ,respectively . The sensitivity of the ACA and cervical length in predicting preterm birth were 86 .90％ and 71 .43％ ,the specificity were 75 .00％ and 62 .14％ ,the accuracy were 75 .94％ and 62 .66％ ,respectively . Conclusions The ACA is an objective and effective indicator to predict preterm birth in the second trimester with transperineal ultrasound . The diagnostic value of measuring the ACA is better than that of measuring the cervical length in the same period .