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Flashcards in Neonatal Adaptation Deck (50)
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1

what is meconium?

dark green substance forming the first faeces of a newborn infant

2

what happens in meconium aspiration?

blocks with airway passages and causes an inflammatory response

3

name the functions of the placenta

fetal homeostasis
gas exchange
nutrient transport to fetus
waste transport from the foetus
acid base balance
hormone production
transport of IgG

4

3 shunts in the fatal circulation

ductus venosus
foramen ovale
ductus arteriolus

5

how much of the blood goes to the lungs?

7%

6

why does the blood need to be oxygenated by the mother?

lungs haven't expanded yet and are full of fluid

7

where is the ductus venous and what does it do?

before the liver and transports oxygenated blood to the foetus

8

where is the foramen ovale?

between the right and left atrium so that blood can pass through

9

what is the role of the ductus arteriosus?

takes the blood from the ventricles into the aorta so that it doesn't all go to the lungs

10

what is more hypoxic foetus or baby?

foetus

11

what is the role of the blood going to the lungs?

perfusion rather than oxygenation

12

what is produced in the 3rd trimester?

surfactant

13

what accumulates before birth?

glycogen in liver, muscle and the heart
brown fat between scapulae and around internal organs

14

what is swallowed and inhaled before birth?

amniotic fluid to fill the lungs and help them grow

15

which hormone is increased in the onset of labour?

catecholamines

16

what stops being synthesised on the onset of labour?

lung fluid

17

what does vaginal delivery do to help the lungs?

squeezes lungs to remove some fluid but the rest is removed by crying

18

is cord clamping delayed or immediate?

delayed

19

what happens to the pulmonary and systemic vascular resistances in transition?

pulmonary drops
systemic rises

20

what happens to the oxygen tension in transition?

rises

21

circulating prostaglandins increase in transition. T/F

false they drop

22

what happens to the ducts and foramen ovale in transition?

ducts constrict
foramen ovale closes

23

what contributes to the duct constriction?

increase in o2 sats
decrease in blood flow
decrease in prostaglandins

24

fate of the foramen ovale

closes or persists

25

fate of the foramen ovale

closes or persists as PFO in 10%

26

fate of the ductus arteriosus

becomes ligamentum arteriosus
can remain persistent but uncommon

27

fate of the ductus venosus

becomes ligamentum teres

28

what causes PPH?

poor transition eg solid lungs, no surfactant

29

what is the result of PPH?

shunts from foetal life remain so can be life threatening

30

how is PPH diagnosed?

pre and post ductal sat monitoring right hand and left foot - more than 3% difference