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

Question

Quizplus · Accepted Answer

This 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. Increased pulmonary vascular resistance causes a partial return to fetal circulation, with right-to-left shunting of blood through the ductus arteriosus and foramen ovale .

Which of the Following Shows the Correct Sequence of Events