Week 1 Maternal and Fetal Phy 3 of 4 Flashcards Preview

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Flashcards in Week 1 Maternal and Fetal Phy 3 of 4 Deck (76)
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1

When talking about circulation in the fetus, most of the oxygenated blood reaching the heart is because of what two veins?

umbilical vein and inferior vena cava.

2

Most of the oxygenated blood reaching the heart via the umbilical vein and inferior vena cava is diverted through the ? and pumped out the ? to the ?

diverted through the FORAMEN OVALE and pumped out the AORTA to the HEAD.

3

What four "products" are transferred from fetal circulation to mother circulation?

1.CO2
2.H2O
3.Hormones
4.Urea, waste products

"CHHU" like shoo :D

4

What seven "items" are transferred from mother circulation to fetal circulation?

1.O2
2.H2O, Electrolytes
3.Nutrients
4.Hormones
5.IgG
6.Drugs (alcohol)
7.Pathogens (TORCHES*)

5

When talking about the placental membrane and specifically fetal trophoblast, what layer is outer and what layer is inner?

syncytiotrophoblast is outer
cytotrophoblast (Langhans' cells) is inner

6

What are the three layers of the Placental membrane?

1.Fetal trophoblast
a.Cytotrophoblast (inner layer); make cells
b.Syncytiotrophoblast (outer invading layer; secrete HCG)

2.Fetal connective tissue

3.Endothelium of the fetal capillaries

7

What does a home pregnancy test detect?

HCG in urine

8

In relation to fetal circulation, deoxygenated blood is returned via what vein?

superior vena cava

9

In relation to fetal circulation, the deoxygenated blood that is returned via the superior vena cava is mostly pumped through which two arteries?

Pulmonary artery and ductus arteriosus

10

In relation to fetal circulation, the deoxygenated blood when it is pumped through the pulmonary artery and ductus arteriosus where does it then go?

to the feet and the umbilical arteries.

11

In relation to to fetal circulation, if you are thinking of deoxygenated blood- then what is the final or ultimate destination of this deoxygenated blood?

The feet and the umbilical arteries

12

Where is most of the oxygenated blood pumped out of ultimately when talking about fetal circulation?

pumped out the aorta (to the head.)

13

Am I talking about oxygenated or deoxygenated blood in fetal circulation below:

blood returned via the superior vena cava?

deoxygenated

14

Am I talking about oxygenated or deoxygenated blood in fetal circulation below:

reaching the heart via the umbilical vein and inferior vena cava?

oxygenated

15

Am I talking about oxygenated or deoxygenated blood in fetal circulation below:

diverted through the foramen ovale?

oxygenated

16

Am I talking about oxygenated or deoxygenated blood in fetal circulation below:

Pumped out the aorta to the head?

oxygenated

17

Am I talking about oxygenated or deoxygenated blood in fetal circulation below:

mostly pumped through pulmonary artery and ductus arteriousus?

deoxygenated

18

Am I talking about oxygenated or deoxygenated blood in fetal circulation below:

to the feet and the umbilical arteries?

deoxygenated

19

Fetal Circulation:

1. Oxygenated blood from placenta enters through what vein?

umbilical vein

20

Fetal Circulation:

2. Most of the blood bypasses fetal liver via ?

ductus venosus

21

Fetal Circulation:

2.(cont) once blood bypasses the fetal liver via the ductus venosus it mixes with deoxygenated blood in the ?

inferior vena cava

22

Fetal Circulation:

3. WHAT shunts blood from the right atrium (increased pressure) directly into the left atrium (decreased pressure)?

Foramen ovale

23

Fetal Circulation:

4. Blood is shunted away from what fetal structure?

fetal lungs (increased resistance)

24

Fetal Circulation:

5. WHAT connects pulmonary artery directly to aorta?

Ductus arteriosus

25

Fetal Circulation:

6. Deoxygenated blood returns to the placenta via the ?

umbilical arteries

26

Tell me the pathway of blood through fetal circulation (simple answers, this to this to this to this)

Umbilical vein to ductus venosus to inferior vena cava to right atrium to left atrium (through foramen ovale) to left ventricle to aorta to body

27

In relation to pathway of blood through fetal circulation, Some blood does not pass to left atrium (through foramen ovale), but enters the right ventricle and pumped into the pulmonary artery. If this occurs where does it go next?

From pulmonary artery blood passes to the aorta through ductus arteriosus bypassing lungs that are rock solid (infinite pulmonary resistance) during fetal life.

(how Mo worded it)

28

during fetal life why are the lungs hard as a rock?

due to atelactasis and hypoxic vasoconstriction

29

What does the umbilical arteries (2) do?

return deoxygenated blood from fetal internal iliac arteries to placenta

30

What does the umbilical vein do?

supplies oxygenated blood from placenta to fetus, drain into IVC via ductus venosus or liver.