After reviewing a client's chart, what is the best rationale for a nurse to monitor oxygen saturation in a post-operative hip arthroplasty patient?

• A. To prevent postoperative delirium
• B. To assess for potential embolism
• C. To monitor for pneumonia risk
• D. To manage pain levels

Answer: (C)

Monitoring oxygen saturation in a post-operative hip arthroplasty patient is particularly important as it helps assess the patient's respiratory function and risk of developing pneumonia. After surgery, patients may have decreased mobility and may not be able to take deep breaths, which can lead to impaired ventilation and increased risk for respiratory complications.

Pneumonia can occur post-operatively due to factors such as shallow breathing, accumulation of secretions, or lack of adequate coughing. By regularly checking the oxygen saturation levels, the nurse can identify any early signs of respiratory distress or hypoxemia, enabling timely interventions. Proper oxygen saturation levels indicate adequate lung function and effective oxygen exchange, which are critical for recovery in post-operative patients.

Although other factors, such as preventing delirium or managing pain, may be important in the overall care of the patient, the specific focus on oxygen saturation is closely linked to respiratory status and prevention of pneumonia in the post-operative setting.