The nurse is assigned to care for two critical care clients. One client was admitted yesterday with pneumonia, is being mechanically ventilated and has an elevated temperature. The other client had a thoracotomy two days ago and is now complaining of incisional pain. Which intervention should the nurse implement first?

Rationale: A. Assess level of consciousness and vital signs for both clients: This action prioritizes airway, breathing, and circulation (ABCs) and ensures prompt identification of any deterioration in either client's condition. It provides critical data needed to safely proceed with further interventions such as administering medications or conducting full assessments. B. Administered pain medication to the client with incisional discomfort: While pain management is important, it is not the priority over initial assessment of both clients' status—especially the one on mechanical ventilation with an elevated temperature. C. Complete a head-to-toe physical assessment for the client with pneumonia: A full assessment is essential, but it is not the most immediate action. Checking vital signs and neurological status first can quickly reveal urgent issues that might require rapid intervention. D. Review the plan of care and the medications for both clients: This is necessary but should be done after determining the clients’ current conditions. Immediate physiological assessment takes precedence in critical care settings to prevent delays in interventions.