What technique is used as a last action to control serious bleeding?

Using a tourniquet is considered a last-resort technique for controlling serious bleeding, especially in cases where direct pressure and other methods have failed or are not adequate. A tourniquet is applied to the limb above the injury site to constrict blood flow, effectively stopping the bleeding by compressing the blood vessels. This method is particularly useful in life-threatening situations, such as traumatic injuries where rapid blood loss could lead to shock or death.

While direct pressure and elevation above the heart are often the first steps taken in managing bleeding, they may not be sufficient for severe cases. A pressure bandage can also help in controlling bleeding, but if the injury is catastrophic or the bleeding is not manageable with simpler techniques, the tourniquet serves as a critical and effective intervention to stabilize the patient until further medical assistance can be provided. Its use is supported by guidelines in emergency care, reflecting its importance in trauma situations involving severe hemorrhage.