Mnemonic : ARDS
A: Airway and Aspiration :
1- gastric aspiration .
2- Airway injury ( smoke inhalation , drowning ) .
R: Related lung infection :
1- Pneumonia.
2- Tuberculosis .
D: Direct lung injury :
1- Chest trauma .
2- Fat embolism .
3- Toxins inhalation ( ammonia ) .
S : Systemic causes :
1- Pancreatitis .
2- Sepsis .
3- Massive blood transfusion.