Ning situation in which pulmonary vascular resistance fails to decrease following delivery. This results in ineffective oxygenation and may cause respiratory failure. PPHN is rare and occurs in about 1 to 2 per 1000 births Graves et al 1988, WalshSukys et al 2000. Meconium aspiration, neonatal asphyxia, cardiac malformations and sepsis are a few of the major causes of PPHN. Known threat aspects in
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