Final answer:
The nurse should assess for decreased urine output as a sign of Curling's ulcer in burn injuries.
Step-by-step explanation:
When assessing burn injuries for signs of curling's ulcer, the nurse should assess for decreased urine output as one of the symptoms. Curling's ulcer is a stress-related gastric ulcer that may occur in burn patients due to decreased blood flow to the stomach, leading to decreased gastric acid secretion and reduced urine production.