When should a tourniquet be applied?

A tourniquet should be applied when bleeding is life-threatening and cannot be controlled by direct pressure. This is crucial in emergency situations where severe hemorrhage may lead to significant blood loss, potentially resulting in shock or death if not addressed promptly. Direct pressure is often the first line of treatment for bleeding, but if that method fails and the bleeding is profuse, a tourniquet provides a means to quickly occlude blood flow to the affected area, thereby minimizing blood loss and preserving the victim's life until more definitive medical treatment can be administered.

In instances where bleeding is severe, using a tourniquet can be a lifesaving measure, particularly in situations such as traumatic injuries or amputations. Proper application of a tourniquet can significantly decrease the risk of mortality from exsanguination by controlling the bleeding effectively. Using it appropriately requires assessment of the situation, ensuring that it is utilized only when necessary to avoid unnecessary complications associated with its use.