What should you do if a single tourniquet does not stop the bleeding?

Applying a second tourniquet above the first is the appropriate action if the first tourniquet fails to control the bleeding. The principle behind using multiple tourniquets is to create increased pressure on the affected limb to halt arterial blood flow effectively. When significant hemorrhaging occurs, a single tourniquet may not provide sufficient pressure or may not be correctly positioned to occlude the blood vessels completely.

By placing a second tourniquet higher on the limb, you can enhance the pressure further and improve the chances of stopping the bleeding. It is crucial to maintain constant monitoring of the patient while awaiting emergency medical services, as controlling severe bleeding is vital for survival.

In contrast, waiting for EMS to arrive may delay critical intervention, and removing the first tourniquet or changing its location could worsen the situation by allowing blood to flow again or failing to effectively manage the hemorrhage.