What is the main function of a tourniquet in emergency medical situations?

The primary function of a tourniquet in emergency medical situations is to stop bleeding, particularly in cases of severe limb injuries where traditional methods of hemorrhage control are insufficient. When applied correctly, a tourniquet compresses the blood vessels and tissues in the affected area, effectively restricting blood flow to the site of injury. This can be crucial in preventing exsanguination, which can lead to shock and potentially death if not addressed promptly.

In scenarios where there is significant trauma, such as those encountered in combat or severe accidents, maintaining control over bleeding is paramount. Applying a tourniquet can provide the time necessary for further medical intervention, such as surgery or advanced care, to take place without the risk of losing the patient's life due to uncontrolled hemorrhage. This life-saving tool is critical in emergency response and helps to stabilize the patient's condition during transport to a medical facility.