How do you diagnose vasa previa?

Vasa Previa is typically diagnosed during an ultrasound evaluation and most often best seen with transvaginal imaging. If Vasa Previa is present, the ultrasound will show a feta blood vessel either directly above or close next to the cervix.

What is differential diagnosis placenta previa?

If undiagnosed preoperatively, placenta previa may be diagnosed or confirmed at cesarean section. The differential diagnoses of placenta previa include abruptio placentae, local cervical lesions (polyps, carcinoma), circumvallate placenta, vasa previa or heavy show.

What are the causes of vasa previa?

The 2 main causes of vasa previa are velamentous insertions (where the cord inserts directly into the membranes, leaving unprotected vessels running to the placenta) (25–62%) and vessels crossing between lobes of the placenta such as in succenturiate or bilobate placentas (33–75%) (36, 56).

How do you rule out vasa previa?

If the placenta is a complete previa or is low-lying, a follow-up ultrasound is indicated to assess for vasa previa. If a vasa previa is suspected, a transvaginal ultrasound with pulsed wave Doppler may confirm the diagnosis.

What are differential diagnosis for antepartum hemorrhage in late pregnancy?

Overview

Differential diagnosis of antepartum bleeding
Condition	Onset	Pain
Placental abruption	Sudden Occurs most often in the third trimester	Usually mild to moderate abdominal pain
Placenta previa	Sudden Prior to rupture of membranes	Painless
Vasa previa	Sudden After rupture of membranes	Painless

What causes vasa previa in pregnancy?

Causes and risk factors One cause of vasa previa is an umbilical cord abnormality called velamentous cord insertion. This is when the umbilical cord goes into the membranes, resulting in vessels that are unprotected leading to the placenta. Another cause is bilobed placenta, where the placenta is in two pieces.

How is vasa previa diagnosed and treated?

Diagnosis and management of vasa previa. Vasa previa occurs when unprotected fetal blood vessels run through the amniotic membranes and traverse the cervix. Complications include fetal hemorrhage, exsanguination, or death. Diagnosis by ultrasound.

What is the pathophysiology of varicose veins (vasa previa)?

Vasa previa occurs when unprotected fetal blood vessels run through the amniotic membranes and traverse the cervix. Complications include fetal hemorrhage, exsanguination, or death.

Is vasa previa an antepartum hemorrhage?

Vasa previa is an extremely rare condition. Consequently it is not often considered in the differential diagnosis of antepartum or intrapartum hemorrhage. Rupture of a fetal vessel may lead to sudden fetal death from exsanguination; therefore, this condition should be suspected in any antepartum or intrapartum hemorrhage.