Platypnea–orthodeoxia syndrome: A dangerous detour of intermediate syndrome with organophosphorus poisoning

Dyspnea experienced in the upright position which is relieved in the supine position, is known as Platypnea. Accompanying desaturation in the arterial blood associated with Platypnea is known as orthodeoxia. Various causes of Platypnea orthodeoxia syndrome, such as hepatopulmonary syndrome, patent foramen ovale and atrial septal defects, are well described in the literature. However, a rather uncommon and underreported cause of Platypnea orthodeoxia syndrome is organophosphorus poisoning. We report a case series of three cases that were reported after ingestion of organophosphorus compounds and developed breathlessness later in the course of the hospital stay, which was diagnosed as Platypnea orthodeoxia syndrome resulting from organophosphorus poisoning. All three cases were treated with supportive management, incentive spirometry and respiratory physiotherapy and responded well to the treatment.