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?

Complaints of nausea within 5 minutes after taking sips of water.

Oral temperature 100° F (37.7°C) 30 minutes after taking an analgesic.

Total urinary output of 20 mL for the past 2 consecutive hours.

Pain in left flank surgical site described as 6 on a 10 point scale.