Background: Abnormal values of pulmonary function measurement (PFM) were described in the advanced form of broncho-pulmonary dysplasia (BPD); however, in the early stages of the disease PFM values still remain unclear. The purpose of our investigation was to test the hypothesis that PFM is helpful in the early diagnosis of BPD. Material/Methods: 73 mechanically ventilated infants with respiratory distress syndrome (RDS) (
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