Respiratory failure of sudden onset because of liquid in the lung area (pulmonary edema), following an abrupt rise in the permeability associated with typical barrier involving the capillary vessel into the lungs and environment sacs. The muscle tissue used in breathing are obligated to work much harder, causing labored and inefficient respiration. An abnormally low-level of oxygen within the bloodstream (hypoxemia) happens. The kinds of intense lung injury that could result in ARDS feature, but they are not limited to, aspiration of food or other items in to the lung area, breathing of a toxic substance, widespread infection for the lung area, blood infection (sepsis), and near-drowning. Treatment frequently requires temporary use of a mechanical ventilator to aid the individual inhale.