viva gross Flashcards
What is circumvallate placenta?
membranes folds on themselves with a layer of amnion and fibrin interposed
What is circummarginate placenta?
membrane reflects without ridge
What is circumchorialis?
membrane reflects before edge
what is velamentous insertion?
chord inserts into membrane and vessels traverse membrane
term length of chord
40-75 cm
diameter of chorda
after 29 weeks 16mm+/-2
coiling
2-4/10cm normal
knots
true or false
Amniotic rupture site significant
if its less than 5 cm from the edge
what is amnion nodosum?
multifocal areas of sq hyperplasia with hyper keratosis occur secondary to anhydromnios
What are craters indicate?
previous retro placental hemarrohage
formalin fixation increases placental weight by?
10-15%
red lesions in placenta
early infarct
hematoma
thrombi
chorangioma
pale lesions in placenta
old infarct
fibrin
avascular area
What is massive Sub chorial hematoma?
> 1 cm thick and 50% of fetal surface