Which of the following describes the purpose of a tourniquet?

A tourniquet is a critical medical device specifically designed to control severe bleeding, particularly in cases of traumatic injuries where direct pressure has failed to stop the blood flow. When applied above the injury site, a tourniquet compresses the blood vessels, effectively restricting blood from reaching the area, which can help prevent life-threatening blood loss. This is especially important in situations where an individual is experiencing an extremity hemorrhage that may lead to shock or death if not addressed promptly.

While immobilizing a fracture is crucial in trauma care, it is not the primary function of a tourniquet. Similarly, providing oxygen to the patient is a role fulfilled by respiratory support and oxygen therapy, rather than a tourniquet. Preventing infection in open wounds is also essential, but this is typically managed through wound care and not through the application of a tourniquet. Thus, the primary purpose of a tourniquet is to control severe bleeding, making it a vital tool in emergency medical situations.