A nurse in an emergency department is caring for an infant who has a 2-day history of vomiting and an elevated temperature. Which of the following should the nurse recognize as the most reliable indicator of fluid loss?

To calculate the daily fluid requirements for a child, you typically use the Holliday-Segar method, which provides guidelines based on the child's weight:

1. For the first 10 kg of body weight, you give 100 ml per kg.
2. For the second 10 kg of body weight, you give 50 ml per kg.
3. For any weight above 20 kg, you give 20 ml per kg.

First, convert the child's weight from pounds to kilograms. To do this, divide the weight in pounds by 2.2.

For a child weighing 33 pounds:

• The weight in kilograms is approximately 15 kg (33 divided by 2.2).

Now, calculate the fluid requirement:

• For the first 10 kg of the child's weight, you need 1000 ml (10 kg multiplied by 100 ml).
• For the remaining 5 kg, you need 250 ml (5 kg multiplied by 50 ml).

Adding these together, the total daily fluid requirement is 1250 ml.

So, the daily fluid requirement for a child weighing 33 pounds is 1250 ml.

Children with sickle cell anemia are prone to dehydration, which can worsen the sickling of red blood cells and trigger a sickle cell crisis. Therefore, it is essential to maintain good hydration to prevent crises. Offering fluids to the child multiple times every day helps to keep them well-hydrated.
Option B is not necessary unless there is a specific medical reason to restrict outdoor play. Regular play is essential for a child's physical and emotional development.
Option C is important, but it is not specific to discharge teaching after an acute crisis episode. Monitoring the child's temperature daily is essential to detect early signs of infection, which can be a trigger for sickle cell crises.
Option D is not recommended because applying cold compresses can cause vasoconstriction and may worsen pain in children with sickle cell anemia. Heat therapy, warm compresses, or a warm bath are more appropriate for pain relief during a sickle cell crisis. However, pain management should be discussed with the healthcare provider to ensure the most appropriate approach for the individual child's needs.