what meets criterion for brain death?
Brain death is typically defined as the irreversible cessation of all brain activity, including brain stem activity. Each country and medical institution may have slightly different criteria for determining brain death, but generally, the following criteria must be met:
1. Absence of consciousness and responsiveness
2. Absence of brain stem reflexes, such as pupillary response to light or gag reflex
3. Absence of spontaneous breathing, as demonstrated by apnea test
4. Persistence of these criteria after a predetermined period of observation and testing
It is important to note that brain death must be diagnosed by a physician with expertise in neurology or critical care medicine, and usually requires confirmation by a second physician.