There are two forms of respiratory distress syndrome:
ARDS, which is acute (or adult) respiratory distress syndrome Infant respiratory distress syndrome (IRDS), which is a complication of premature birth, also known as hyaline membrane disease (HMD)Also, respiratory distress can mean:
Shortness of breath Respiratory failureIn respiratory distress syndrome, and possibly other lung diseases, the immune system overreacts to trauma or infection. White blood cells called neutrophils flock to the lungs, releasing tissue-damaging enzymes.