Diffuse alveolar damage (DAD): an acute lung condition with the presence of hyaline membranes.[2] These hyaline membranes are made up of dead cells, surfactant, and proteins.[2] The hyaline membranes deposit along the walls of the alveoli, where gas exchange typically occurs, thereby making gas exchange difficult. Acute respiratory distress syndrome (ARDS): a potentially life threatening condition where the alveoli are damaged thereby letting fluid leak into the lungs which makes it difficult to exchange gases and oxygenate the blood.[3] It is the general practice of the medical community to use the Berlin criteria to diagnose ARDS. All criteria must be present to make a diagnosis of ARDS.