Placenta path I Flashcards Preview

Year2 Repro exam I > Placenta path I > Flashcards

Flashcards in Placenta path I Deck (42):
1

what is difference of fetal and maternal surface of placenta

fetal surface is flat
maternal has cotyledons

2

what is important about looking at placenta post delivery

look at the cotyledons of the maternal size to make sure there isnt anything missing that could still be in mother attached to uterus

3

what is important about looking at umbilical cord after birth

see how many aa/vv because if 2, 35% assoc with structural and chromosomal abnormalities

4

when does placental implantation take place after fertilization

1-2 weeks

5

what are the early functions needed for placental implantation

produce hCG to prevent loss of corpus luteum
re-model spiral aa for nutrition
anchoring villi
absorptive villi

6

what occurs to endometrium under unfluence of P after ovulation

becomes secretory and blood vessel rich in preparation for implantation of the blastocyst

7

where does exchange of fetal maternal blood take place

in the intervillous spacec between the choirionc villi surrounded by cytotrophoblasts and syncytiotrophoblasts

8

what happens to smooth muscle cells of the apiral aa in pregnancy

invaded by endovascular cytotophoblasts which create high P arteriole system and low R lacunar system for the blood to pool and exchange nutrients

9

abnormalities of the cytotrophoblasts can lead to what condition

preeclampsia

10

metabolic transfer between mom and fetus occurs through what cells

syncytiotrophoblasts

11

spontaneous abortions occur when

<12 weeks

12

risk factors for spont abortions

smoking
inc maternal age
previous spont abortion

13

what fetal factors could lead to spont abortion

chromosomal abnormalities
hydatidiform mole
neural tube defects

14

what maternal factors could lead to spont abortion

endocrine disorders
luteal phase defect
physica uterine abnormalities
systemic disorders
TORCH infections
blood type incompatibility

15

What are the TORCH pathogens

toxo, other, rubella, CMV, HSV

16

spont abortion in 1st trimester is usually due to what

chromosomal abnormality

17

spont abortion in 2nd trimester is usually due to what

mechanical

18

spont abortion in 3rd trimester is usually due to

fetoplacental unit

19

can you have bleeding during pregnancy that is okay

yes! painless usually

20

predisposing conditions to ectopic pregnancies

PID, appendicitis, endometriosis, previous surgery, IUDs

21

clinical Sx of ectopic pregnancies

severe abdominal pain: hematosalpinx
tubal rupture: intra-abdominal hemorrhage, shock

22

Dx ectopic pregnancy

beta hCG, US, laparoscopy

23

what is dichorionic diamnionic pregnancy

fraternal twins, each has on amnion, own chorion

24

what is dichorionic diamnionic fused pregnancy

fraternal that share septum of chorion

25

what is monochorionic diamnionic amnion

share chorion, separate amnion

26

what is monochorionic monoamnionic

share everything-- identical

27

if jelly roll of placenta shows amnion on either side of thick chorion know its what type pregnancy

di di, fraternal twins

28

if there is one chorion and 2 amnion on jelly roll of placenta

monozygous, identical twins

29

what condition of twins can lead to death of one or both fetuses

monochorionic because can have disproportionate sharing of fetal circulations

30

What is placenta previa

implantation in lower uterine segment

31

abruptio placenta

retroplacental hemorrhage

32

placenta accreta

placenta infiltrates in myometrium from lack of intervening decidua
placenta cannot detach after delivery

33

what is the most common cause of antepartum hemorrhage

placenta previa

34

how do we prevent antepartum hemorrhage in placenta previa

C section

35

Sx placenta previa

painless bleeding in 3rd trimester

36

Sx abruptio placenta

painful bleeding

37

significant complication of abruptio placenta

preeclampsia

38

bleeding from abruptio placenta requires what Tx

immediate delivery

39

loss of decidua basalis because placenta attached to myometrium is called what

placenta accreta

40

complication of placenta accreta

uterine rupture

41

what are the types of placenta accreta

accreta is most shallow
increta
percreta- deep

42

predisposing conditions for placenta acreta

endometrial scarring
previous C section
endometrial inflammation