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Flashcards in FETAL CIRCULATION Deck (3)
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1

what would happen to the O2 content in the pulmonary artery in a patient with PDA (oxygenated blood)

- obliteration of ductus arteriosus causing a detour or reversal of flow of blood causing LEFT TO RIGHT SHUNT
- normal flow should be low to high PA (deoxygenated blood) to AORTA (oxygenated blood) what happens is high to low AORTA (oxygenated blood) to PA (deoxygenated blood)
- causing LV as the main pump of blood to the aorta having 100% pressure
- decrease flow to the systemic circuit
- causing HYPOPERFUSION
- CAUSING AN INCREASE IN OXYGEN CONTENT because of the recirculation of oxygenated blood in the pulmonary artery

2

highest source of oxygen in the fetal circulation

- umbilical vessels 80%
- thru the placenta

3

main pump in the fetus

- RV systolic pressure 25mm Hg because lung is asleep