Bronchopulmonary Dysplasia in Preterm Infants Born at Less Than 32 Weeks Gestation.
OBJECTIVE
Bronchopulmonary dysplasia (BPD) is a chronic pulmonary disorder affecting preterm infants. We studied the factors and echocardiographic evidence of early pulmonary hypertension (PH) associated with moderate or severe BPD.


METHODS
We retrospectively reviewed preterm infants who were born at <32 weeks gestation and admitted to the neonatal intensive care unit at the Children's Hospital of Zhejiang University School of Medicine between July 2013 and July 2015.


RESULTS
Forty-two preterm infants were enrolled in the study. All the patients received oxygen treatment for a mean of 62.5 ± 28.0 days. The grades of BPD were classified as follows: severe, 35.7%; moderate, 40.5%; and mild, 23.8%. The time of ventilator and oxygen supplementation was longer in infants who developed PH. Severe BPD was related to PH at 28 days.


CONCLUSIONS
These findings support the notion that early pulmonary vascular disease and long-term infection in preterm infants contributes to increased susceptibility for severe BPD.
The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China.
Yan-Ping
YP
Xu
bronchopulmonary dysplasia; prematurity
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