What is the primary rationale behind using indirect pressure to control bleeding?

Using indirect pressure to control bleeding is primarily effective because it targets the blood vessels supplying the injury site without directly compressing the wound itself. When pressure is applied to the arteries located proximal to the site of bleeding, it helps to reduce blood flow to the injury, thereby preventing further blood loss. This method is particularly useful in situations where direct pressure may not be feasible or sufficient due to the nature of the injury or if there are multiple injuries causing significant blood loss.

While reducing pain for the casualty may occur as a secondary benefit, the primary goal of applying indirect pressure is focused on controlling hemorrhage. Although promoting quicker evacuation and allowing the casualty to move are important aspects of effective casualty care, they are not the primary rationale behind the practice of using indirect pressure specifically for bleeding control. The effectiveness in managing blood loss through controlling vascular flow demonstrates the significance of indirect pressure in trauma care.