What is the proper technique for applying a tourniquet?

The proper technique for applying a tourniquet is to place it above the injury site. This technique is crucial because tourniquets are designed to occlude blood flow to a limb with significant bleeding. By positioning the tourniquet above the injury, it effectively compresses the blood vessels that are supplying the injured area, thus preventing further blood loss and allowing for better chances of survival until advanced medical help can arrive.

Applying the tourniquet at the injury site would not achieve the necessary compression of the blood vessels that supply the limb, as it may not fully stop the bleeding. Similarly, placing it below the injury site would leave the injury still prone to heavy bleeding. Using a tourniquet loosely is also ineffective because a loose application would fail to provide the necessary pressure to control the hemorrhage, reducing its effectiveness in an emergency situation where rapid and decisive action is needed.