Final answer:
Arterial blood gases are the priority when using the airway, breathing, circulation approach to client care. They can provide information about oxygen saturation and acid-base balance, helping healthcare professionals assess a patient's respiratory and metabolic status.
Step-by-step explanation:
When using the airway, breathing, circulation approach to client care, the nurse should place priority on evaluating arterial blood gases to determine serum oxygen saturation and acid-base balance. Arterial blood gases can provide information about the levels of oxygen and carbon dioxide in the blood, as well as the pH and bicarbonate levels, which are crucial in assessing a patient's respiratory and metabolic status. By analyzing arterial blood gases, healthcare professionals can identify conditions such as acidosis or alkalosis and determine the appropriate interventions.