Which of the following is applied with the intent of stopping blood circulation?

The tourniquet is specifically designed to stop blood circulation by applying pressure to a limb. It is used in emergency situations where a major artery has been compromised, leading to life-threatening hemorrhage. When applied correctly, a tourniquet occludes blood flow beyond the point of injury, which can be critical in managing severe bleeding. This method is often used on extremities where control of arterial bleeding is necessary until further medical treatment can be given.

In contrast, other options like a pressure dressing and hemostatic dressing aim to control bleeding through different mechanisms, such as applying pressure to the wound or promoting clot formation, rather than completely halting circulation. A suction device is utilized for removing fluids or debris and does not affect blood circulation directly. The tourniquet serves a unique purpose in emergency medical care by effectively controlling severe bleeding and minimizing the risk of shock and death.