What is the primary purpose of using a tourniquet in medical emergencies?

The primary purpose of using a tourniquet in medical emergencies is to slow down blood loss. In scenarios involving severe bleeding, particularly from a limb, a tourniquet is applied to compress the blood vessels and dramatically reduce the flow of blood to the injury. This is critical in preventing exsanguination (severe blood loss), which can lead to shock or even death if not managed promptly.

Using a tourniquet effectively can buy valuable time for medical professionals to intervene and provide definitive treatment. While the tourniquet may not completely stop blood flow, its intent is to significantly decrease the rate of blood loss, allowing for a better chance of survival until further care can be provided. This is especially vital in cases of traumatic injuries, where controlling bleeding can be life-saving.