severe coronavirus disease 2019 (COVID-19) with low respiratory compliance and poor
oxygenation as main characteristics and mortality rate of 50%–94%. Surfactants, including
surfactant protein D (SP-D), have a role in maintaining respiratory compliance. This study
aimed to analyze the relationship between serum SP-D levels with respiratory compliance
and ARDS in patients with critically ill COVID-19 pneumonia. Methods: This study was a …