Fetal Physiology Flashcards Preview

Jason's MD3 Women's > Fetal Physiology > Flashcards

Flashcards in Fetal Physiology Deck (29):
1

Where is most energy to fetus comes as?

-Glucose 50%
-Stored as glycogen starting at 36 weeks.
-Amino acids
-lactate
-acetate (Krebs)

2

Water content in newborn compared to preterm?

Less ECF
More ICF
More fat

3

Preterm baby allowed to lose how much weight at birth?

15%

4

How many umbilical veins/arteries?

1 vein
2 arteries

5

Fetal circulation:

Umbilical vein>ductus venous>IVC>RA>foramen Ovale>LA>LV>aorta

Anything that goes into RV and Pulmonary artery shunts to the aorta via Dustus arteriosus

Aorta to Internal iliacs>umbilical arteries

6

How to detect acidosis in fetus?

Fetal scalp lactate

7

In first breath

-Placenta removed
-Shunts close
-Pulmonary resistanceDrops dramatically
4. Parallel > series

8

P50 adult Hb is?

27mmHg

9

P50 fetal Hb O2?

20mmHg
More affinity: takes O2 from mom
-Alpha and Gamma

10

Fetal O2 sats in utero?

~lower, relative hypoxia

11

Normal colour born?

Blue

12

Born white?

Anaemia
Asphyxia

13

Baby's arts hit 90-100% when?

5 minutes

14

Haemoglobin of newborns?

~160
Nadir at 6weeks.

15

Patent ductus arteriosus why?

Giving O2 to babies, O2 closes, NSAIDS, panadol closes

Prostaglandin to keep it open

16

When alveoli develop?

~22 weeks

17

Fetal lung liquid is?

Made in lung

18

How is fetal lung liquid production stopped?

Switched off by adrenaline

19

C-section for fetal lungs?

Risk of transient tachypnoea of newborn/ Wet Lung

20

How is fetal lung fluid Ex pulsed?

Birth canal squeezed out
Lymphatic absorption
Pulmonary circulation

21

Effect of oligohydraminios?

Underdevelopment of lungs

22

Asphyxia in utero, consequences?

Myconeum aspiration

23

Surfactant

Reduces surface tension
Lipoprotein complex
DPPC - hydrophilic and phobic ends, they repel each other keeping it open

24

Hyaline membrane syndrome/ RDS?

Not enough surfactant

25

Stimuli to breath?

Light
Cold -face
Physical stim
Movement of air
position
Pain
Noises
Visual

26

What is head's paradoxical reflex? Positive pressure

Mask onto newborns times breathing.

Mask on adult, you stop breathing.

27

Polyhydramnios consequences. If not swallowing, why?

Esophageal atresia
Neurological probs
Fistula, tracheo

28

If fetus has renal a Genesis then?

Oligohydraminios

29

What is Potter's Syndrome?

Renal agenesis>Oligohydramnios>less lung development
Can't survive