Pulmonary Agents Signs and Symptoms: Eye and airway irritation, dyspnea, chest tightness, and delayed pulmonary edema. Detection: Odor of newly mown hay or freshly cut grass or corn. There is no military detector for phosgene. Decontamination: Vapor: fresh air. Liquid: copious water irrigation. Management: Termination of exposure, ABCs of resuscitation, enforced rest and observation, oxygen with or without positive airway pressure for signs of respiratory distress, other supportive therapy as needed. OVERVIEW Inhalation of selected organohalides, oxides of nitrogen (NOx), and other compounds can result in varying degrees of pulmonary edema, usually after a symptom-fre