What are the major factors in the pathophysiology of RDS? 1. Qualitative surfactant deficiency 2. Increased alveolar surface area 3. Increased small airways compliance 4. Presence of the ductus arteriosus
a. 1 and 2 only
b. 1 and 3 only
c. 1, 3, and 4 only
d. 1, 2, 3, and 4
ANS: C
The major factors in the pathophysiology of RDS are qualitative surfactant deficiency, decreased alveolar surface area, increased small airways compliance, and the presence of the ductus arterio-sus.
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