CXR of PPHN and BPD - USMLE Forums
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Old 11-30-2011
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X Ray CXR of PPHN and BPD

Hi all:

Can someone please explain why

a.) In persistent pulmonary hypertension of the newborn(PPHN), usually in chest x-ray pulmonary vascular markings are decreased initially in infants with idiopathic PPHN not caused by meconium aspiration syndrome(MAS) or perinatal asphyxia? In MAS or perinatal asphyxia, due to less oxygen, these two syndromes will not constrict their pulmonary arteries and thus decrease pulmonarty markings?

b.) In bronchopulmonary dysplasia(BPD), how can i differentiate the CXR from respiratory distress syndrome(RDS)?

Thank you for your patience!
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