Which of the following actions is appropriate for managing life-threatening bleeding?

Using a tourniquet or hemostatic dressing is a critical intervention for managing life-threatening bleeding. These methods are designed to control severe hemorrhaging by applying direct pressure to the wound, restricting blood flow to the affected area. A tourniquet is specifically used when bleeding cannot be controlled by other means, such as direct pressure, and should be placed above the injury on the limb. Hemostatic dressings contain agents that promote clotting and can be especially effective in severe trauma cases where rapid blood loss poses significant risk to life.

In contrast, oral medications are not suitable for immediate management of acute bleeding, as they do not address the urgent need for hemostasis. Performing CPR, while essential in cardiac arrest situations, does not directly manage bleeding and is not appropriate in the context of a bleeding emergency. Waiting for emergency services can delay necessary life-saving interventions when immediate action is required to prevent shock or death from significant blood loss.