Is neonatal risk from vasa previa preventable? The 20-year experience from a single medical center.
BACKGROUND
Vasa previa is a rare condition associated with neonatal morbidity and mortality that may be diagnosed prenatally using transvaginal sonography. The aim of this study was to assess the prenatal detection of vasa previa and its subsequent impact on neonatal outcomes in two 10-year periods (1988-1997 versus 1998-2007).


METHODS
Retrospective review of all cases of vasa previa. Data on obstetrical history, modes of conception, sonographic scans, delivery mode, and neonatal outcome were retrieved and recorded.


RESULTS
There were 19 pregnancies (21 neonates) with confirmed vasa previa (overall incidence of 1.7/10,000 deliveries). Vasa previa were diagnosed prenatally in 10 (52.6%) cases. In cases without prenatal diagnosis, there was a higher proportion of neonates with 1' Apgar score < or = 5 and cord blood pH <7 compared with cases diagnosed prenatally (66.7% versus 10%, p < or = 0.05, and 33.3% versus 0%, p < 0.05, respectively). The prenatal detection rate of vasa previa increased from 25 to 60% between the 2 time periods (p > 0.05), whereas perinatal mortality and 1' Apgar scores < or = 5 decreased from 25 to 0% and from 50 to 33.3% (p > 0.05).


CONCLUSIONS
Prenatal sonographic screening using targeted scans for vasa previa in women at risk or as part of routine mid-gestation scanning may significantly impact its obstetric manifestations.
Smorgick
Noam
N
Department of Obstetrics and Gynecology, Assaf Harofe Medical Center, affiliated with the Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
Tovbin
Yosef
Y
Ushakov
Fred
F
Vaknin
Zvi
Z
Barzilay
Bernard
B
Herman
Arie
A
Maymon
Ron
R
D000046:Academic Medical Centers; D000328:Adult; D005260:Female; D005313:Fetal Death / Q000517:prevention & control*; D006801:Humans; D007557:Israel; D008875:Middle Aged; D011247:Pregnancy; D012189:Retrospective Studies; D012307:Risk Factors; D018615:Ultrasonography, Doppler, Color / Q000379:methods; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014470:Umbilical Cord / Q000000981:diagnostic imaging*; D055949:Vasa Previa / Q000000981:diagnostic imaging* / Q000453:epidemiology; D055815:Young Adult