Flashcards in Fetal Physiology Deck (29):
Where is most energy to fetus comes as?
-Stored as glycogen starting at 36 weeks.
Water content in newborn compared to preterm?
Preterm baby allowed to lose how much weight at birth?
How many umbilical veins/arteries?
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
How to detect acidosis in fetus?
Fetal scalp lactate
In first breath
-Pulmonary resistanceDrops dramatically
4. Parallel > series
P50 adult Hb is?
P50 fetal Hb O2?
More affinity: takes O2 from mom
-Alpha and Gamma
Fetal O2 sats in utero?
~lower, relative hypoxia
Normal colour born?
Baby's arts hit 90-100% when?
Haemoglobin of newborns?
Nadir at 6weeks.
Patent ductus arteriosus why?
Giving O2 to babies, O2 closes, NSAIDS, panadol closes
Prostaglandin to keep it open
When alveoli develop?
Fetal lung liquid is?
Made in lung
How is fetal lung liquid production stopped?
Switched off by adrenaline
C-section for fetal lungs?
Risk of transient tachypnoea of newborn/ Wet Lung
How is fetal lung fluid Ex pulsed?
Birth canal squeezed out
Effect of oligohydraminios?
Underdevelopment of lungs
Asphyxia in utero, consequences?
Reduces surface tension
DPPC - hydrophilic and phobic ends, they repel each other keeping it open
Hyaline membrane syndrome/ RDS?
Not enough surfactant
Stimuli to breath?
Movement of air
What is head's paradoxical reflex? Positive pressure
Mask onto newborns times breathing.
Mask on adult, you stop breathing.
Polyhydramnios consequences. If not swallowing, why?
If fetus has renal a Genesis then?