In managing a patient from a head-on motor vehicle accident with an unstable hip, what is the PRIORITY intervention?

In the case of managing a patient from a head-on motor vehicle accident with an unstable hip, the priority intervention is the application of a pelvic binder. This is crucial because an unstable hip injury may indicate significant pelvic disruption or fractures, which can lead to life-threatening hemorrhage due to the rich vascular supply in the pelvic region.

The pelvic binder serves to compress the pelvis, reducing the space available for potential bleeding and stabilizing the injury. This intervention is critical in minimizing the risk of hemorrhagic shock, which can occur rapidly in such scenarios. By applying a pelvic binder, medical personnel can help control bleeding and maintain hemodynamic stability, which is vital in emergency care settings.

While administering IV fluids, inserting a second IV line, and possibly initiating a massive transfusion protocol are important considerations, they follow the immediate need to stabilize the pelvis. In emergent situations, addressing potential sources of internal bleeding takes precedence to ensure the patient's survival.