During the war, massive blood loss remains an important cause of early death in the wounded, such as the Vietnam War.
Blood has led to the death of lo% wounded. Therefore, timely and effective hemostasis, to save the life of the wounded, stabilize the injury, to create conditions for follow-up treatment is very important. Because the tourniquet has the advantages of fast, effective, convenient and easy to carry, it has an irreplaceable role in the hemostasis of the extremities of war wounds.
The use of tourniquet can be traced back to the Greeks hunting age, but the spiral tourniquet developed in 1718 was considered a milestone because it was the first official design and production well designated for use as the Hemostatic emperor. In World War II, the rubber hose tourniquet was widely used in the battlefield, saving many lives. The hemostatic principle of tourniquet is very simple, that is, the blockage of arteriovenous blood flow. However, the hemostatic effect and safety of different types of tourniquet are different, which is closely related to the structure of tourniquet. Previous studies have shown that the hemostatic effect of tourniquet is related to its width and pressure. The narrower the tourniquet, the greater the pressure of hemostasis, the wider the smaller, but when the width increases to a certain extent, the required pressure tends to be the same; when the tourniquet width >13cm, the required hemostasis pressure is close to the arterial systolic pressure of the site.