Natural History of Vasa Previa Across Gestation Using a Screening Protocol

Objectives The purpose of this study was to estimate the prevalence and persistence rate of vasa previa in at‐risk pregnancies using a standardized screening protocol. Methods We conducted a descriptive study of patients with a diagnosis of vasa previa from a single ultrasound unit between June 2005...

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Bibliographic Details
Published in:Journal of ultrasound in medicine 2014-01, Vol.33 (1), p.141-147
Main Authors: Rebarber, Andrei, Dolin, Cara, Fox, Nathan S., Klauser, Chad K., Saltzman, Daniel H., Roman, Ashley S.
Format: Article
Language:English
Subjects:
Adult
Female
Humans
Incidence
Male
Mass Screening - methods
Mass Screening - statistics & numerical data
Middle Aged
obstetric ultrasound
Pregnancy
prenatal diagnosis
Reproducibility of Results
Risk Assessment
Sensitivity and Specificity
Ultrasonography, Prenatal - methods
Ultrasonography, Prenatal - statistics & numerical data
Vasa Previa - diagnostic imaging
vasa previa migration
vasa previa screening
Young Adult
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Summary:Objectives The purpose of this study was to estimate the prevalence and persistence rate of vasa previa in at‐risk pregnancies using a standardized screening protocol. Methods We conducted a descriptive study of patients with a diagnosis of vasa previa from a single ultrasound unit between June 2005 and June 2012. Vasa previa was defined as a fetal vessel within 2 cm of the internal cervical os on transvaginal sonography. Screening for vasa previa using transvaginal sonography with color flow mapping was performed routinely in the following situations: resolved placenta previa, prior pregnancy with vasa previa, velamentous insertion of the cord in the lower uterine segment, placenta succenturiata in the lower uterine segment, and twin gestations. Results A total of 27,573 patients were referred to our unit for fetal anatomic surveys over the study period. Thirty‐one cases of vasa previa were identified, for an incidence of 1.1 per 1000 pregnancies. Twenty‐nine cases had full records available for analysis. Five patients (17.2%) had migration and resolution of the vasa previa. When the diagnosis was made during the second trimester (
ISSN:0278-4297
1550-9613
DOI:10.7863/ultra.33.1.141