2016, Number 11
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ABSTRACTObjetive: We suggest an algorithm for an accurate and reproducible prenatal diagnosis of vasa previa.
Method: The diagnostic algorithm is based on placental morphology, its anatomical relationship with the low uterine segment and the type of cord insertion.
Results: We diagnosed 20 cases of vasa previa, 11 in singleton pregnancies and 9 in twins. The incidence detected was 1/1694 births. 10 cases were in vitro fertilization pregnancies. The average gestational age at the time of the ultrasound diagnosis was 25 weeks. 16 cases (80%) were classified as type I (velamentous insertion), 1 case (5%) as type II (bilobed placenta) and 3 cases (15%) as Twin type (velamentous cord insertion of second twin). The marginal or low insertion placenta was diagnosed in 7 cases (35%), and we found 3 bilobed placenta. All patients with the prenatal sonographic diagnosis of vasa previa were delivered by cesarean at a median gestational age of 35 weeks. All newborns were healthy.
Conclusion: This algorithm has let us easily diagnose vasa previa in our Hospital.
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