Perinatal Adaptation

Question 1

what is accumulated in the 3rd trimester to prepare for birth

Answer 1

glycogen
brown fat (around internal organs)
SC fat

Question 2

what else happens during 3rd trimester to prepare for brith

Answer 2

surfactant production

Swallowing amniotic fluid

Question 3

what happens to the circulatory system soon after the baby is born

Answer 3

Pulmonary vascular resistance drops 
Systemic vascular resistance rises 
Oxygen tension rises
Circulating prostaglandins drop
Duct constricts
Foramen ovale closes

Question 4

name the 3 shunts of the fetal circulation

Answer 4

Ductus venosus (shunt between umbilical vein + IVC) 
Foramen Ovale (door between right + left atria)
Ductus arteriosus

Question 5

what happens to the fetal shunts after birth

Answer 5

Foramen ovale closes
Ductus arteriosus becomes ligamentum arteriosus
Ductus venosus becomes ligamentum teres

Question 6

What happens if the cardio/resp system fails to adapt

Answer 6

persistent pulmonary hypertension of the new born (PPHN)

Question 7

management of persistent pulmonary hypertension of the newborn

Answer 7

Ventilation
Oxygen
Nitric oxide
Sedation

Question 8

what reflex helps a baby feed

Answer 8

rooting + suck reflex

Question 9

what happens to oxygen haemoglobin dissociation curve after birth

Answer 9

curve shift to the right

Question 10

how does physiological jaundice occur

Answer 10

Breakdown of fetal Hb
Conjugating pathways immature
rise in circulating unconjugated bilirubin
Not harmful unless very high levels