Why is a head immobilizer important in the transport of a patient with a suspected spinal injury?

A head immobilizer is crucial in the transport of a patient with a suspected spinal injury primarily because it prevents head movement. Maintaining the stability of the head reduces the risk of further injury to the spinal cord. In cases of spinal injuries, even slight movement can exacerbate damage, potentially leading to paralysis or other serious complications. By using a head immobilizer, medical personnel can ensure that the patient's head remains in a fixed position, thereby enhancing the safety of the transport process.

While other options might seem relevant to patient care, they do not directly address the immediate concern of protecting the spine in the context of a suspected spinal injury. Supporting the victim's arms, enhancing breathing, or keeping the patient warm does not specifically mitigate the risks associated with movement of the head, which is the primary reason for employing a head immobilizer.