What management step is appropriate for a patient who shows signs of hypoxia following head trauma?

Providing supplemental oxygen is the appropriate management step for a patient who shows signs of hypoxia following head trauma. Hypoxia, which is a deficiency of oxygen in the tissues, can lead to severe complications, especially after a head injury where cerebral perfusion and oxygenation are critical. Administering oxygen helps to ensure that the brain and other vital organs receive the necessary oxygen to function properly, which is especially important in the context of trauma where there can be compromised respiratory function or circulatory stability.

Ensuring adequate oxygenation can also help to reduce the risk of secondary injuries to the brain, which can occur if oxygen levels are not maintained. This action is part of the immediate management to stabilize the patient before further assessments or interventions take place.

While other options may be considered in broader contexts of trauma management, they do not address the immediate need to correct hypoxia, which is critical in this scenario. Administering fluids might be necessary in cases of shock but does not directly address hypoxia. Delaying transport to conduct further assessments could worsen the patient's condition if hypoxia is present. Likewise, restricting movement to protect the spine is relevant in spinal injuries but does not prioritize the treatment of hypoxia.