Pulmonary Surfactant(PS) Therapy at High Altitude Area

The traditional concept believes that the etiology of neonatal respiratory distress syndrome (RDS) is immature development of lung,especially the surfactant synthesis system,and RDS is still one of the major causes of mortality and morbidity in newborns, especially premature infants\[1\].In recent years, using pulmonary surfactant replacement therapy (PS treatment) in the treatment of respiratory distress syndrome (RDS) is a major breakthrough in neonatal medicine \[2\].Combined with clinical practice and experience,and through Meta analysis of related randomized controlled trials (RCTs),it confirms that natural surfactant treatment can reduce mortality,the incidence of pulmonary air leaks (pneumothorax and interstitial lung emphysema),and the incidence of bronchopulmonary dysplasia (BPD) or 28-day-old mortality.For RDS in preterm infants whose gestation is \<35 weeks ,surfactant replacement therapy is also more effective than in nearly term and full term infants.Therefore, in the analysis of cases of different gestational age groups,the investigators should focus on the study of premature infants cases.Due to less relevant research for using PS treatment to cure newborn RDS in high altitude area,this retrospective study conducts statistics and analysis of recently three-year cases in some hospital of high altitude area,to explore the treatment effect of the high altitude region and the impact of altitude on the treatment.