When entering the room of a sedated postoperative client, which assessment requires immediate intervention by the nurse?

Rationale: A. Low intermittent suction prescribed for the nasogastric tube is turned off: While nasogastric suction helps prevent gastric distention and vomiting, turning it off temporarily is not immediately dangerous. This should be addressed but does not pose an urgent risk if the client is stable. B. The urinary catheter drainage bag is almost completely full of amber urine: Although the bag should be emptied to prevent backflow or tension on the catheter, amber urine is expected and not concerning. This is a routine task and does not indicate an urgent issue. C. Oxygen is being administered via nasal cannula at 4 L/min without humidification: Oxygen at this rate may cause nasal dryness if humidification is not used, but this does not create an immediate threat to client safety. It should be corrected, but it’s not the most critical concern. D. A Hemovac drain is partially full of serous drainage and is not compressed: The Hemovac must remain compressed to provide negative pressure for continuous drainage. If not compressed, fluid can accumulate at the surgical site, increasing infection and hematoma risk. This requires prompt correction to prevent postoperative complications.