What should be done after you have applied a tourniquet to a casualty's arm for a severely bleeding wound?

After applying a tourniquet to a casualty's arm for a severely bleeding wound, the most appropriate action is to reassess the casualty's condition after reaching safety. This is crucial because after applying a tourniquet, ongoing assessment allows you to gauge the effectiveness of the intervention while also checking for any signs of shock or other critical issues in the casualty.

Reassessing helps to confirm that the tourniquet has successfully controlled the bleeding and to determine if any further actions are needed, such as additional interventions or preparing for evacuation. Ensuring that the casualty remains stable is essential during the response to traumatic injuries, and a thorough reassessment can provide vital information about their status.

One must also remember that the tourniquet is designed to be a temporary measure to control life-threatening bleeding, and subsequent medical care will be needed to address the injury. Thus, reaching safety before reassessing ensures the caregiver's safety as they attend to the casualty and could open up avenues for more comprehensive treatment if the situation permits.