Final answer:
In cases of life-threatening bleeding, immediately apply direct pressure to the site and elevate the area, if possible. Call for emergency services right away, and if necessary, and only as a last resort, use a tourniquet. Professional medical treatment should follow as soon as possible.
Step-by-step explanation:
When recognizing that an adult, child, or infant has life-threatening bleeding, it is essential to take immediate action to minimize blood loss and get professional help. The first step is to apply direct pressure to the bleeding site with a clean cloth or gauze to control the bleeding. If possible, elevate the affected area above the heart level to reduce blood flow to the injury. While managing the wound, call for emergency medical services or get someone else to do so, ensuring the injured individual gets professional medical attention as quickly as possible.
If the bleeding is severe and does not stop with direct pressure, then it may be necessary to use a tourniquet. Tourniquets should be used only if the bleeding is life-threatening and not controlled by other means and should be placed between the injury and the heart, about 2-3 inches above the wound, but not over a joint. Once the tourniquet is in place, professional medical help is crucial as improper use can lead to further injury.
In situations where there is a risk of significant blood loss (such as 500 ml or more), there may be a need for fluid resuscitation with appropriate access and fluids. However, this is something to be managed by medical professionals upon their arrival or in a hospital setting.