How much blood loss will cause death

In life, many people are prone to bleeding when they are sick. For some accidents, whether it is a fall or a car accident, it is easy to cause excessive bleeding and cause death. In fact, blood is very important to the human body. When there is too much blood loss, if blood is not supplemented in time, it is easy to cause life metabolism without energy. So how much blood loss will cause death?

If acute blood loss reaches more than 30%, or more than 1000 ml, it may reach the limit of human compensation and endanger human life.

1An average adult body has about 4000 to 5000 ml of blood, which is equivalent to the capacity of a boiled water bottle. The clinical manifestations of acute blood loss depend on the amount and rate of blood loss, as well as the patient's original health status and age.

2 Most healthy young people can tolerate 500-1000 ml (equivalent to 10%-20% of blood volume) of blood loss, which rarely causes symptoms and does not lead to anemia, but about 5% of people develop symptoms due to "vasovagal reaction".

3 The amount of blood loss in a short period of time is between 1000 and 1500 ml (20% to 30% of the total blood volume). If the patient is a healthy young person with a stable mental state, he or she may not experience symptoms after a quiet rest and lying in the supine position, but cardiovascular symptoms may occur after activity.

4 If the amount of blood loss reaches 1500-2000ml (30%-40% of the total blood volume), obvious symptoms will appear even in the supine resting state: cold hands and feet, pale complexion, thirst, little urine, weak and rapid pulse, low blood pressure, and temporary loss of consciousness.

5 If the amount of blood loss exceeds 2000-2500 ml (40%-50% of the total blood volume), severe hemorrhagic shock may occur, which may lead to death if not handled properly. Patients with existing chronic diseases, infections, malnutrition, dehydration or anemia, and the elderly may suffer shock or death even if the amount of blood loss is less than the above.