What is the most appropriate immediate action if initial direct pressure does not control severe bleeding?

When initial direct pressure fails to control severe bleeding, utilizing a tourniquet is the most appropriate immediate action. Tourniquets are effective because they can significantly reduce blood flow to the affected area, thereby minimizing blood loss in emergency situations where bleeding is profuse and life-threatening. They are designed to occlude arterial blood flow and are particularly useful in extremity injuries.

Applying another bandage over the first is not an effective method to address severe bleeding when direct pressure has already proven inadequate, as it may not apply sufficient pressure to control the bleeding.

Calling for advanced medical support is a necessary step in the overall management of a patient with severe bleeding, but it does not directly address the immediate need to control the hemorrhage. Time is critical in these situations, and priority must be given to methods that can stop the bleeding right away.

Transporting the patient is also important but should not be the primary action when severe bleeding is occurring. If bleeding is not controlled before transportation, the patient's condition could worsen significantly, leading to shock or even death.

Using a tourniquet is a recommended practice in trauma care for severe hemorrhage control, highlighted in current guidelines when direct pressure is ineffective.