ObjectiveTo investigate the clinical value of pulmonary ultrasound score in predicting neonatalrespiratory distress syndrome（NRDS）combined with bronchopulmonary dysplasia（BPD）.MethodsA total of 158 childrenwith NRDS admitted to our hospital were selected for pulmonary ultrasound examination. Pulmonary ultrasound score wascalculated

and general clinical data of the children were collected.The children were divided into BPD group（n=71）and non-BPD group（n=87）according to whether they were combined with BPD. The differences in pulmonary ultrasound scores andclinical data between the two groups were compared.Receiver operating characteristic（ROC）curve was drawn to analyze thediagnostic efficacy of pulmonary ultrasound scores in predicting NRDS combined with BPD

and the correlation betweenpulmonary ultrasound scores and different treatment modality was analyzed.ResultsThere were statistically significantdifferences between the two groups in gestational age

birth weight

time of hospitalization

continuous positive airway pressurebreathing and mechanical ventilation time

and Apgar score（all P<0.05）.There were no statistically significant differences ingender

number of twins

time of conventional oxygen therapy

intrauterine infection and incidence of neonatal pneumoniabetween the two groups.The pulmonary ultrasound score of the BPD group was 39.15±4.26

which was higher than that of thenon-BPD group（26.23±5.89）

and the difference was statistically significant（P<0.001）.The area under the curve of pulmonaryultrasound score for predicting neonatal NRDS combined with BPD was 0.832.The diagnostic sensitivity

specificity

positivepredictive value and negative predictive value were 78.0%

89.0%

86.7% and 74.5% with a cutoff value of 37.There was apositive correlation between pulmonary ultrasound scores and respiratory therapy（r=0.47

P<0.05）.ConclusionPulmonary ultrasound scoring method can help predict whether children with NRDS are associated with BPD

and can provide reliableimaging evidence for their reasonable diagnosis and treatment.