The halo device is a medical tool designed to stabilize and support the head and neck of patients with spinal injuries. It consists of a ring that encircles the head, connected to a vest that secures the device to the body. This immobilization helps prevent further injury during treatment and transport. Typically used in emergency situations, the halo device allows for safe movement and positioning of patients while ensuring that the spine remains aligned. It is often employed in hospitals and trauma centers, providing essential support during recovery and rehabilitation processes.