How does pregnant woman blood vessel preposition grow up?

summary

How does pregnant woman blood vessel preposition grow up? The incidence of anterior vessels ranged from 1 / 8333 to 1 / 1275, and the overall incidence was 1 / 2500., The incidence of velamentous placenta with vascular previa was 2% to 6%. It may not only cause fetal blood loss during delivery, but also cause fetal or neonatal death. At the same time, fetal malformations in the anterior vessels increase, such as urinary tract malformations, spina bifida, umbilical hernia, single umbilical artery and so on. It can be seen that velament placenta, bilobate placenta, accessory placenta, placenta previa, multiple pregnancy and IVF are the common risk factors of vascular previa, which should be paid attention to during pregnancy examination.

How does pregnant woman blood vessel preposition grow up?

There are two types of vascular previa. One is vascular previa, which occurs when the umbilical vessels are connected with the placenta through the fetal membrane when the placenta is attached in sail or edge; Another type is lobulated placenta or paraplacenta, the connection between the placenta blood vessels caused by vascular previa, known as type 2.

It should also be distinguished from umbilical cord, separation of Chorioamnion, marginal sinus of placenta, amniotic cord and venous sinus of uterus. Laser can be used to fuse the placenta previa blood vessels to avoid blood vessel rupture and bleeding.

With the increase of gestational age, 15% of the patients with vascular previa disappeared in the third trimester. For pregnant women with vascular previa, the length of cervical canal was measured to assess the risk of premature delivery and premature rupture of membranes. Before 28 weeks of gestation, color Doppler ultrasound was reexamined every 3-4 weeks to find out whether the vascular previa continued to exist and whether the cervical canal became shorter. After 28 weeks of gestation, color Doppler ultrasound was reexamined every 1-2 weeks.

matters needing attention

1. Regular prenatal examination, early detection of the disease, such as in the middle and late pregnancy to reduce activity, prevent constipation, do not do vaginal examination, anal examination, fetal maturity, selective cesarean section. 2. If the diagnosis is confirmed in the process of labor, the fetus is still alive and the fetal rate is still regular, cesarean section should be performed as soon as possible.