关于“体位窒息死”：Positional asphyxia, also known as postural asphyxia, is a form of asphyxia which occurs when someone's position prevents them from breathing adequately. A significant number of people die suddenly during restraint by police, prison (corrections) officers and health care staff.[1] Positional asphyxia may be a factor in some of these deaths.
Positional asphyxia is a potential danger of some physical restraint techniques,
People may die from positional asphyxia by simply getting themselves into a breathing-restricted position they cannot get out of, either through carelessness or as a consequence of another accident.
From wiki： http://en.wikipedia.org/wiki/Positional_asphyxia
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