The characteristics of blood perfusion in the three stages of shock are as follows: 1. In the early stage of shock, due to capillary spasm and contraction, it will lead to blood pooling in the capillaries, resulting in a large decrease in the amount of blood returned to the heart, at this time the characteristics of blood perfusion are mainly less perfusion, less flow, and less perfusion than flow, and there is insufficient peripheral blood supply. 2. In the shock stage, the patient’s whole body small vessels are bleeding spasm and contraction, which will lead to a large amount of blood pooling in the In the late stage of shock, the main characteristic of blood perfusion is no perfusion and no flow, which is due to the formation of a large amount of clotting, which will block the blood flow, and the patient will have multi-organ failure in this period, seriously endangering the patient’s The patient’s life is seriously endangered.