1, dying. Also known as the struggle period, it refers to the last stage of a person's struggle before he dies. Generally speaking, there are many facial depression, snoring from time to time, high blood pressure, blurred or disappeared consciousness, weakened, dull or disappeared body reflexes, decreased blood pressure, weakened pulse and breathing or periodic breathing. The duration of this period ranges from a few seconds to several hours or more.
2. Clinical death period. This is a short period before the death of living things. Explain that breathing and heartbeat stop, and all kinds of body reflexes completely disappear. On the surface, human life activities have stopped, but the weak metabolic process in the tissue is still going on, and life may be revived. This period is usually 5-6 minutes.
3. Biological death period. The life activities of various tissues and cells in the body stop and fall into an irreversible state, which goes through a process, first of all, the cerebral cortex, and then the whole central nervous system changes irretrievably, the functions of various organs and tissues in the body collapse, and the heartbeat and breathing stop. Artificial resuscitation can't succeed, the brain is deprived of oxygen for more than 5-6 minutes, the brain cells are necrotic, and the central nervous system function stops permanently.
Extended data:
Classification of causes of human death
1, the root cause of death is the original cause of death, such as the primary natural disease or violent factors that lead to death. In the case of death from natural diseases, the main causes of death are consistent with the main diseases, such as death from advanced malignant tumor and death from coronary heart disease and myocardial infarction. Death caused by violent death, such as mechanical injury, mechanical suffocation, etc.
2. The direct cause of death. If the root cause of death directly leads to death without intermediate links, then it is not only the root cause of death, but also the direct and only cause of death. The root cause of death is not direct, but the latter is the direct cause of death because of its secondary consequences or complications. The common direct causes of death in forensic medicine are infection, bleeding, embolism, poisoning and general failure.
3, auxiliary cause of death, natural diseases or injuries other than the main cause of death, which are not fatal in themselves, but play an auxiliary role in the death process. For example, patients with severe fatty liver died of alcoholism, alcoholism is the main cause of death, and fatty liver is the auxiliary cause of death. The patient with giant aneurysm died after being beaten. Aneurysm is the main cause of death, and boxing is the auxiliary cause of death.
4. Incentives, factors that induce the deterioration of the original potential diseases of the body and lead to death, including various mental and emotional factors, overwork, smoking, trauma, alcoholism, sexual intercourse, overeating, hunger, cold, etc. These factors are generally not fatal to healthy people, but for people with potential lesions in some important organs, they can induce disease deterioration and lead to death.
5, common cause of death, in the same case, two or more difficult to distinguish between primary and secondary causes of death together cause death and constitute the same * * *. Including: disease and disease die together, disease and violence die together, violence and violence die together.
Baidu encyclopedia-death
Baidu Encyclopedia-Death Process