Final answer:
The most important thing for a nurse to emphasize during discharge planning for a child after a sickle cell vasoocclusive crisis is an increased intake of fluids.
Step-by-step explanation:
The most important thing for a nurse to emphasize during discharge planning for a child after a sickle cell vasoocclusive crisis is an increased intake of fluids. This is because dehydration can worsen sickle cell symptoms and can trigger vasoocclusive crises. Drinking plenty of fluids helps to keep the blood hydrated and prevent the sickle-shaped red blood cells from sticking together and causing blockages in blood vessels.