FIGURE 7.

Differentiation between TTN and RDS. The infant above had a GA of 38 wk and was delivered by cesarean section; the infant had a birth weight of 2750 g. The infant started to experience progressive dyspnea soon after birth. The infant was diagnosed with RDS based on medical history and clinical and CXR manifestations. However, lung ultrasonography only showed pleural line abnormalities, white lung, pleural effusion, and A-line disappearance without lung consolidation. Therefore, the infant suffered from TTN rather than RDS. The clinical course of the infant was also consistent with TTN. CXR = chest radiography, GA = gestational age, RDS = respiratory distress syndrome, TTN = transient tachypnea of the newborn.