What is the function of a tourniquet?

The function of a tourniquet is to compress blood vessels. When applied properly, a tourniquet restricts blood flow to a specific area of the body, most commonly in cases of severe bleeding from a limb. This is a critical measure used to control hemorrhaging and prevent excessive blood loss, which can be life-threatening. The application of pressure works by constricting the blood vessels and minimizing the blood flow, thereby allowing for time to seek medical treatment.

In emergencies, when rapid intervention is required, a tourniquet can be applied to prevent the progression of blood loss. It is important to note that while a tourniquet can save lives, it should be used judiciously and only when necessary, as prolonged application can lead to tissue damage. Other choices, such as cleaning wounds, stabilizing fractures, and administering intravenous fluids, are related to different medical interventions and do not encompass the primary purpose of a tourniquet.