What is a key step when using a windlass rod tourniquet?

The correct answer highlights the critical importance of stopping blood loss when using a windlass rod tourniquet. The primary purpose of a tourniquet is to apply sufficient pressure to the blood vessels and tissues in order to control severe bleeding from a limb. By twisting the rod until the bleeding stops, you ensure that enough pressure is applied to the area, effectively restricting blood flow and reducing the risk of exsanguination.

It's essential to monitor the patient's condition while applying the tourniquet, as the pressure needs to be sufficient but not excessive enough to cause further tissue damage. In emergency situations, time is of the essence, and achieving hemostasis—stopping the flow of blood—is a vital intervention that can save a life.