The practical nurse (PN) is assigned to care for a client who had a left nephrectomy yesterday. Which finding should the PN report to the charge nurse immediately?

A. Complaints of nausea within 5 minutes after taking sips of water: Mild nausea postoperatively is common and can often be managed with antiemetics or slow oral intake. While it should be monitored, it does not require immediate escalation. B. Oral temperature 100° F (37.7°C) 30 minutes after taking an analgesic: A low-grade fever is not unusual after surgery due to inflammation or early postoperative response. It warrants observation but is not an urgent finding. C. Total urinary output of 20 mL for the past 2 consecutive hours: Oliguria after nephrectomy is a critical sign that may indicate impaired renal function or hypovolemia. Reporting this immediately allows timely intervention to prevent renal compromise and fluid-electrolyte imbalance. D. Pain in left flank surgical site described as 6 on a 10 point scale: Moderate pain is expected postoperatively and can be managed with prescribed analgesics. It does not require immediate reporting unless accompanied by other acute complications.