Rh disease & multifetal gestation Flashcards Preview

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Flashcards in Rh disease & multifetal gestation Deck (13)
1

Positive Rh (D) Ab screening consists of

serial Ab titres q2-4weeks

2

what can U/S show as indicator of hydrops?

visualizations of fetal bowel w/ small amts of intraabd fluid

3

what does the liley curve tell you?

fetal anemia

4

One dose of _____ Rhogam will cover ____ of fetal whole blood in maternal circulation

300mcg; 30ml

5

what test tells you the % fetal RBC in maternal circulation?

Kleihauer-Betke Test

6

incidence of multifetal gestation

1/90

7

division of the conceptus within 3 days of fertilization

Diamniotic/Dichorionic

8

division occurs between 4-8 days. Chorion has already begun to develop but amnion has not

Diamniotic/Monochorionic

9

1% of monozygotic gestations, division occurs between days 9-12 after development of both amnion and chorion so they share a common sac.

Monoamnionic/Monochorionic

10

division occurs incompletely

conjoined

11

dx of multifetal pregnancy

size > dates

12

does monochoriionic or dichorionic gestation have greater M & M?

monochorionic

13

what syndrome is due to arterio-venous anastomosis?

twin-twin transfusion syndrome