Ginecologia y obstetricia de Mexico · 2011
[Cervical length in predicting preterm labor].
Клиническое исследованиеСтатьяНазвание и аннотация: Перевод пока не подготовлен
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Serrano-Gómez Servando Germán, García-Morales Martha Patricia
Аннотация
BACKGROUND: Preterm birth is the birth occurring between 20-37 weeks gestation. Is responsible for 75% of neonatal mortality in infants without congenital malformations.
OBJECTIVE: To determine the prognostic factor of cervical length measurement in threatened preterm labor, in patients treated at a hospital in Veracruz, Mexico.
MATERIAL AND METHOD: Observational, prospective, longitudinal and descriptive study performed at the Obstetrics and Perinatology services of the Hospital General de Zona Núm. 71, IMSS, from May to December 2007.
INCLUSION CRITERIA: patients admitted to the obstetrics service with a diagnosis of preterm labor of 22 to 36 weeks, single gestation.
EXCLUSION CRITERIA: history of premature rupture of membranes, uterine malformation, stillbirth, pregnancies of fetuses with birth defects, carriers of cerclage and a history of cervical cone biopsy. The cervicometry was performed with 7-9 MHz vaginal transducer; increased risk of preterm delivery were considered in patients with cervical length < 25 mm, the existence of funnel was also assessed. We determined the sensitivity, specificity, positive predictive value and negative.
RESULTS: We studied 73 pregnant women diagnosed with preterm labor. The average age was 26.5 + 5.2 years. Fourteen (19.2%) patients had a history of income for preterm labor in previous pregnancies. In ten patients (10.7%), measurement of cervical length < 25 mm and the criterion of the number of weeks of preterm delivery (22-36) agreed (true positives); and 58 (79.5%) patients with cervical length > 25 mm and > or = 38 weeks gestation also agreed (true negatives).
CONCLUSIONS: The sensitivity to correctly predict preterm delivery was 71%, specificity of 98%, positive predictive value of 91% and negative predictive value of 94%, so the cervicometry is considered a useful tool for treatment and monitoring of preterm delivery.
OBJECTIVE: To determine the prognostic factor of cervical length measurement in threatened preterm labor, in patients treated at a hospital in Veracruz, Mexico.
MATERIAL AND METHOD: Observational, prospective, longitudinal and descriptive study performed at the Obstetrics and Perinatology services of the Hospital General de Zona Núm. 71, IMSS, from May to December 2007.
INCLUSION CRITERIA: patients admitted to the obstetrics service with a diagnosis of preterm labor of 22 to 36 weeks, single gestation.
EXCLUSION CRITERIA: history of premature rupture of membranes, uterine malformation, stillbirth, pregnancies of fetuses with birth defects, carriers of cerclage and a history of cervical cone biopsy. The cervicometry was performed with 7-9 MHz vaginal transducer; increased risk of preterm delivery were considered in patients with cervical length < 25 mm, the existence of funnel was also assessed. We determined the sensitivity, specificity, positive predictive value and negative.
RESULTS: We studied 73 pregnant women diagnosed with preterm labor. The average age was 26.5 + 5.2 years. Fourteen (19.2%) patients had a history of income for preterm labor in previous pregnancies. In ten patients (10.7%), measurement of cervical length < 25 mm and the criterion of the number of weeks of preterm delivery (22-36) agreed (true positives); and 58 (79.5%) patients with cervical length > 25 mm and > or = 38 weeks gestation also agreed (true negatives).
CONCLUSIONS: The sensitivity to correctly predict preterm delivery was 71%, specificity of 98%, positive predictive value of 91% and negative predictive value of 94%, so the cervicometry is considered a useful tool for treatment and monitoring of preterm delivery.