Final answer:
The first indication that a child's acute glomerulonephritis is improving is an increase in urine output.
Step-by-step explanation:
The best response by the nurse to parents who want to know the first indication that their child's acute glomerulonephritis is improving would be:
- An increase in urine output
When glomerulonephritis starts improving, the kidneys begin to function more effectively, resulting in an increased urine output. This is a positive sign as it indicates that the kidneys are starting to recover. Other signs of improvement may include a decrease in protein in the urine and a decrease in blood pressure.