viva gross Flashcards

1
Q

What is circumvallate placenta?

A

membranes folds on themselves with a layer of amnion and fibrin interposed

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2
Q

What is circummarginate placenta?

A

membrane reflects without ridge

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3
Q

What is circumchorialis?

A

membrane reflects before edge

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4
Q

what is velamentous insertion?

A

chord inserts into membrane and vessels traverse membrane

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5
Q

term length of chord

A

40-75 cm

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6
Q

diameter of chorda

A

after 29 weeks 16mm+/-2

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7
Q

coiling

A

2-4/10cm normal

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8
Q

knots

A

true or false

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9
Q

Amniotic rupture site significant

A

if its less than 5 cm from the edge

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10
Q

what is amnion nodosum?

A

multifocal areas of sq hyperplasia with hyper keratosis occur secondary to anhydromnios

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11
Q

What are craters indicate?

A

previous retro placental hemarrohage

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12
Q

formalin fixation increases placental weight by?

A

10-15%

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13
Q

red lesions in placenta

A

early infarct
hematoma
thrombi
chorangioma

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14
Q

pale lesions in placenta

A

old infarct
fibrin
avascular area

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15
Q

What is massive Sub chorial hematoma?

A

> 1 cm thick and 50% of fetal surface

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16
Q

marbled appearance of placenta

A

perivillous fibrin deposition