Objective To explore the early diagnostic value of lung ultrasound in transient tachypnea in newborns（TTN）.Methods A total of 80 neonates with dyspnea admitted to neonatology department in our hospital were selected.According to the clinical diagnosis results

the neonates were divided into TTN group（n=57）and respiratory distress syndrome（RDS）group（n=23）.Lung ultrasonography and chest X-ray were performed on all neonates

and the results were compared.The clinical diagnosis results were used as the gold standard

the diagnostic efficiency of ultrasound and X-ray on TTN were compared.Results The proportions of abnormal pleural line

white lung sign

double lung point

alveolar interstitial syndrome and pulmonary consolidation between TTN group and RDS group showed no statistically significant differences. Taken clinical diagnosis results as the golden standard

and the sensitivity

specificity

positive predictive value

negative predictive value and accuracy of lung ultrasound in the diagnosis of TTN were 94.74%

95.65%

98.18%

88.00% and 95.00%

respectively. The sensitivity

specificity

positive predictive value

negative predictive value and accuracy of X-ray in the diagnosis of TTN were respectively 84.21%

82.61%

92.31%

67.86%

83.75%

respectively. The sensitivity

specificity

positive predictive value

negative predictive value of lung ultrasound in the diagnosis of TTN were higher than those of X-ray

but the differences were no statistically significant.The accuracy of lung ultrasound in the diagnosis of TTN was obviously higher than that of X-ray

and the difference was statistically significant（P<0.05）.Conclusion Lung ultrasound has significant value in the early diagnosis of TTN

which is worthy of clinical application.