Hello, there are three kinds

1. The dying stage

The dying stage is also called the fighting stage or the dying struggle stage. It is the struggle before death. final stage. During this period, severe disorders and failures occur in the body and vital organ functions. Initially, patients or victims often have depressed faces, snoring from time to time, and elevated blood pressure. Subsequently, difficulty in breathing, weakened heartbeat, drop in body temperature and blood pressure, confusion, incontinence of urine and feces, weakened, slowed or disappeared various reflexes, as well as coma, convulsions, etc. Finally, there is a gradual transition to clinical death.

2. Clinical death stage

If a person who is in a dying state is not treated in time or the rescue is ineffective, he will develop into the clinical death stage. This is a brief stage before biological death. During this period, the heart stops, breathing stops, and various reflexes disappear completely. Under normal circumstances, Chinese doctors diagnose death based on these three major signs, so it is called clinical death. For a person who is clinically dead, the body's vital activities have ceased from the outside, but weak metabolic activities within the body's tissues are still going on. Within 4 to 5 minutes or a little longer after cardiac arrest and respiratory arrest (nerve reflexes disappear generally earlier than cardiac arrest and respiratory arrest), a small amount of oxygen is retained in the body and the lowest living condition can be maintained. If an artificial ventilator is used , cardiac massage, pacemaker and other first aid measures, there is still a possibility of recovery.

3. Biological death period

Biological death refers to the cessation of important physiological functions of the entire body and its irreversible state. Its external symptoms are that the body gradually becomes cold, rigor mortis occurs, and corpse spots form.

Biological death is also a gradual process, starting with the necrosis of the cerebral cortex and brain cells, followed by the permanent cessation of the functions of the central nervous system, and finally the successive disintegration of the functions of various organs and tissues