Which option shows the correct sequence of events after atelectasis develops in respiratory distress syndrome of the newborn?
A) Increased pulmonary vascular resistance, atelectasis, hypoperfusion
B) Hypoxic vasoconstriction, right-to-left shunt hypoperfusion
C) Respiratory acidosis, hypoxemia, hypercapnia
D) Right-to-left shunt, hypoxic vasoconstriction, hypoperfusion

Question

Quizplus · Accepted Answer

Atelectasis results in a decrease in tidal volume,causing alveolar hypoventilation and hypercapnia.Hypoxia and hypercapnia cause pulmonary vasoconstriction,which increases intrapulmonary resistance and shunting.This results in hypoperfusion of the lung and a decrease in effective pulmonary blood flow.This selection is the only option that identifies the correct sequence of events.

Which Option Shows the Correct Sequence of Events After Atelectasis