Fetal Environment And Maternal Complications Flashcards
A definitive placenta may not be seen until after:
10-12 weeks
Additional, smaller lobes separate from the main segment of placenta
Succenturiate lobe/ accessory lobe
- Abnormally shaped placenta, curled up edges.
- may lead to abruption, bleeding
Circumvallate placenta
Placenta thickness should not exceed:
4cm
Element of placenta closest to the fetus
Chorionic plate
Placental grading: uninterrupted chorionic plate and homogeneous
Grade 0
Placental grading: subtle indentations on the chorionic plate, small calcifications within placental substance
Grade 1
Placental grading: moderate indentations in chorionic plate with “comma-like” calcifications in placental substance
Grade 2
Placental grading: prominent indentations in chorionic plate that extend into the basal layer with diffuse echogenic and anechoic areas noted within the placental substance.
Grade 3
Placental grading:
Grade 0
Placental grading:
Grade 1
Placental grading:
Grade 2
Placental grading:
Grade 3
Placenta covering the internal os of cervix
Placenta previa
The placenta should be evaluated for previa after ___ weeks
20 weeks
Placenta covers internal os completely
Total/complete previa
Placenta partially covers internal os
Partial previa
Placenta lies at the edge of the internal os
Marginal previa
Placenta edge extends into lower uterine segment and is less than 2 cm from the internal os
Low lying placenta
Fetal vessels resting over the internal os
Vasa previa
Cord insertion associated with vasa previa:
Velamentous cord insertion
Premature separation of placenta from uterine wall
Placental abruption
Most severe placental abruption
Complete abruption
Type of placental abruption: development of retroplacental hematoma
Complete abruption