A client with a history of heart failure reports sudden onset of shortness of breath. The nurse notes crackles in the lung bases bilaterally and a oxygen saturation of 88% on room air. Which action should the nurse take immediately?

Question: A client with a history of heart failure reports sudden onset of shortness of breath. The nurse notes crackles in the lung bases bilaterally and a oxygen saturation of 88% on room air. Which action should the nurse take immediately?

Answer options:

• Administer a prescribed diuretic.
• Elevate the head of the bed to a semi-Fowler's position.
• Obtain a 12-lead electrocardiogram. ✅ Administer supplemental oxygen.

Correct answer: Administer supplemental oxygen.

Explanation: The client is experiencing acute dyspnea and hypoxemia. Administering supplemental oxygen is the most immediate intervention to improve oxygenation and alleviate respiratory distress. While other actions may be necessary, addressing oxygenation is the priority given the SpO2 of 88%.