An 88 pound child with iron deficiency anemia has been prescribed ferrous fumarate 3 mg/kg/day PO three times daily. The medication is available in oral suspension of 100 mg/5 ml. The nurse is instructing the mother in measuring the correct dose. How many ml should the child receive for each dose?
The Correct Answer is ["2"]
Calculating the Ferrous Fumarate Dose
Problem: Administer ferrous fumarate 3 mg/kg/day PO three times daily to an 88-pound child. The available concentration is 100 mg/5 mL.
Steps:
Convert pounds to kilograms:
88 pounds x (1 kg / 2.20462 pounds) ≈ 39.9 kg
Calculate the daily dose:
3 mg/kg/day x 39.9 kg = 119.7 mg/day
Calculate the dose per administration (TID):
119.7 mg/day / 3 doses = 39.9 mg/dose
Set up a proportion:
We want to find the number of milliliters (mL) needed.
We know the desired dose (39.9 mg) and the concentration of the medication (100 mg/5 mL).
Proportion:
x mL / 39.9 mg = 5 mL / 100 mg
Cross-multiply:
100x = 199.5
Solve for x:
x = 199.5 / 100
x ≈ 2
Answer: The child should receive approximately 2 mL of ferrous fumarate oral suspension for each dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["160"]
Explanation
To prepare a 4-hour solution of Osmolite® 1/2 strength enteral formula at 80 ml/hour, the nurse will need to dilute the full-strength formula with a certain amount of water.
Step 1: Calculate the total volume of the 1/2 strength formula needed for 4 hours:
Total Volume = Infusion Rate (mL/hour) x Infusion Time (hours)
Total Volume = 80 mL/hour x 4 hours
Total Volume = 320 mL
Step 2: Determine the volume of full-strength Osmolite® needed:
Since the desired solution is 1/2 strength, we need to dilute the full-strength formula by half.
Volume of Full-Strength Osmolite® = Total Volume / 2
Volume of Full-Strength Osmolite® = 320 mL / 2
Volume of Full-Strength Osmolite® = 160 mL
Step 3: Calculate the volume of water needed to dilute the full-strength Osmolite®:
Volume of Water = Total Volume - Volume of Full-Strength Osmolite®
Volume of Water = 320 mL - 160 mL
Volume of Water = 160 mL
Therefore, the nurse should dilute the full-strength Osmolite® with 160 mL of water to prepare a 4-hour solution.
Correct Answer is ["2000"]
Explanation
To calculate the infusion rate of magnesium sulfate, we'll follow these steps:
1. Calculate the concentration of magnesium sulfate in the IV solution:
Magnesium Sulfate Concentration = Magnesium Sulfate (g) / Solution Volume (mL)
Magnesium Sulfate Concentration = 4 grams / 250 mL
Magnesium Sulfate Concentration = 16 mg/mL
2. Calculate the magnesium sulfate infusion rate in mg/hour:
Magnesium Sulfate Infusion Rate = Infusion Rate (mL/hour) x Magnesium Sulfate Concentration (mg/mL)
Magnesium Sulfate Infusion Rate = 125 mL/hour x 16 mg/mL
Magnesium Sulfate Infusion Rate = 2000 mg/hour
Therefore, the nurse should administer 2000 mg/hour of magnesium sulfate.
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