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Asphyxia or asphyxiation (from Ancient Greek "without" and , "squeeze" (throb of heart))〔(【引用サイトリンク】title=''Asphyxia'' Origin )〕 is a condition of severely deficient supply of oxygen to the body that arises from abnormal breathing. An example of asphyxia is choking. Asphyxia causes generalized hypoxia, which affects primarily the tissues and organs. There are many circumstances that can induce asphyxia, all of which are characterized by an inability of an individual to acquire sufficient oxygen through breathing for an extended period of time. Asphyxia can cause coma or death. ==Cause== Situations that can cause asphyxia include but are not limited to: the constriction or obstruction of airways, such as from asthma, laryngospasm, or simple blockage from the presence of foreign materials; from being in environments where oxygen is not readily accessible: such as underwater, in a low oxygen atmosphere, or in a vacuum; environments where sufficiently oxygenated air is present, but cannot be adequately breathed because of air contamination such as excessive smoke. Other causes of oxygen deficiency include but are not limited to: * Acute respiratory distress syndrome * Carbon monoxide inhalation, such as that from a car exhaust and the smoke's emission from a lighted cigarette: carbon monoxide has a higher affinity than oxygen to the hemoglobin in the blood's red blood corpuscles, bonding with it tenaciously, and, in the process, displacing oxygen and preventing the blood from transporting oxygen around the body * Contact with certain chemicals, including pulmonary agents (such as phosgene) and blood agents (such as hydrogen cyanide) * Drowning * Drug overdose * Exposure to extreme low pressure or vacuum to the pattern (see space exposure) * Hanging, specifically suspension or short drop hanging. * Self-induced hypocapnia by hyperventilation, as in shallow water or deep water blackout and the choking game * Inert gas asphyxiation * Ondine's curse, central alveolar hypoventilation syndrome, or primary alveolar hypoventilation, a disorder of the autonomic nervous system in which a patient must consciously breathe; although it is often said that persons with this disease will die if they fall asleep, this is not usually the case * Respiratory diseases * Sleep apnea * A seizure which stops breathing activity * Strangling 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「asphyxia」の詳細全文を読む スポンサード リンク
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