Which of the following findings on the chest radiograph are typical for RDS? 1. Hyperinflation 2. Air bronchograms 3. Diffuse hazy infiltrates 4. Bilateral reticulogranular densities
a. 1 and 3 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 2, 3, and 4 only
ANS: D
Diffuse, hazy, reticulogranular densities with the presence of air bronchograms with low lung volumes are typical of RDS. The reticulogranular pattern is caused by aeration of respiratory bronchioles and collapse of the alveoli. Air bronchograms appear as aerated, dark, major bronchi surrounded by the collapsed or consolidated lung tissue.
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