Abstract
Objective This study aimed to compare the lung ultrasonography (LUS) scores after two different
natural surfactant administration as a parameter reflecting lung inflation.
Study Design Preterm infants of 32 gestational weeks and below who were diagnosed with respiratory
distress syndrome (RDS) were randomly assigned to be administered either poractant
alfa or beractant, prospectively. Serial LUS scans were obtained by an experienced
neonatologist in a standardized manner before and after (2 and 6 hours) surfactant
administration. The LUS scans were evaluated by protocols based on scores and lung
profiles.
Results Thirty-seven infants received poractant alfa and 36 received beractant. The baseline
characteristics and presurfactant LUS scores were similar in groups. The scores were
significantly decreased after surfactant administration in both groups (2 hours, p = < 0.001; 6 hours, p = < 0.001). LUS scores in poractant group were significantly lower than beractant
group when compared at each time point. At the end of 6 hours, the number of infants
with the normal profile was significantly higher in the poractant group (∼65%) than
the beractant group (22%).
Conclusion LUS is beneficial for evaluating lung aeration after surfactant treatment in preterm
infants with RDS. A better lung aeration can be achieved in the early period with
the use of poractant alfa.
Keywords
lung ultrasound - premature infants - respiratory distress syndrome - surfactant