What is vasa previa

Vasa praevia, also spelled vasa previa, is a condition in which fetal blood vessels cross or run near the internal opening of the uterus. These vessels are at risk of rupture when the supporting membranes rupture, as they are unsupported by the umbilical cord or placental tissue. Risk factors include in vitro fertilization.Other names: Specialty: 

What is vasa previa pregnancy?

What is vasa previa? Vasa previa is an incredibly rare, but severe, complication of pregnancy. In vasa previa, some of the fetal umbilical cord blood vessels run across or very close to the internal opening of the cervix. These vessels are inside the membranes, unprotected by the umbilical cord or the placenta.

What is the origin of vasa previa?

In vasa previa, the origin of the cord is in the membranes near the placenta, so there is an area in the membranes where the blood vessels are not in the cord at all. Even worse, this area of the membranes containing the cord blood vessels is in front of the internal cervical os.

What is the treatment for vasa previa?

Vasa Previa Treatment. It is possible that your doctor will also recommend that you be hospitalized throughout your third trimester. Steroids are sometimes used to mature the lungs of the fetus in the event it must be delivered prematurely; amniocentesis can be used to determine whether this is necessary.

What are the risk factors of Vasa praevia?

These vessels are at risk of rupture when the supporting membranes rupture, as they are unsupported by the umbilical cord or placental tissue. Risk factors include low-lying placenta, in vitro fertilization. Vasa praevia occurs in about 0.6 per 1000 pregnancies.

What happens during vasa previa?

In vasa previa, membranes that contain blood vessels from the fetus to the placenta lie across or near the entrance to the birth canal (the opening of the cervix). When the membranes rupture (near the start of labor), these blood vessels can be torn.

How does vasa previa affect the fetus?

In vasa previa, membranes that contain blood vessels connecting the umbilical cord and placenta lie across or near the opening of the cervix—the entrance to the birth canal. Vasa previa may cause massive bleeding in the fetus and mother when the membranes around the fetus rupture, usually just before labor starts.

Can you have vasa previa without placenta?

Thank you for your reply, but according to the Merck Manual, the vasa previa condition can happen without involvement of the placenta. (See description below). Vasa previa occurs when membranes that contain fetal blood vessels connecting the umbilical cord and placenta overlie the internal cervical os.

What is vas Previa in pregnancy?

Vasa previa may be present if any of the following conditions exist: Velamentous cord insertion—an umbilical cord abnormality occurring in about 1–2 percent of pregnancies, in which the cord inserts into the fetal membranes and travels through them to the placenta, rather than inserting directly into the placenta