Review Note
Last Update: 10/08/2024 02:15 PM
Current Deck: SC1 Peds::Neonatology::Neonatal Physiology
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Text
The first breaths the baby takes expands the alveoli, therefore decreasing the {{c1::pulmonary vascular resistance}}.
This decrease in resistance causes a {{c1::fall in pressure}} in the right atrium.
At this point the left atrial pressure is smaller/greater?? {{c1::greater}} than the right atrial pressure, which squashes the atrial septum and causes functional closure of the {{c2::foramen ovale. }}
The {{c2::foramen ovale}} then structurally closes and becomes the {{c2::fossa ovalis. }}
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