A nurse practitioner orders Medrol to be given 1.6 mg/ kg of body weight. Medrol is an anti-inflammatory administered as an intramuscular injection. If a child weighs 71.1 lb and the stock of Medrol is 20. mg/mL, how many milliliters does the nurse administer to the child?
Express your answer to two significant figures and include the appropriate units.
First, we need to convert the weight of the child from pounds to kilograms. We know that 1 lb is equal to 0.4536 kg. Therefore, the child's weight in kilograms is:
71.1 lb * 0.4536 kg/lb = 32.2 kg.
Next, we need to calculate the total dosage of Medrol that the child should receive. We can do this by multiplying the child's weight by the dosage ordered by the nurse practitioner:
32.2 kg * 1.6 mg/kg = 51.52 mg.
Since the stock of Medrol is in milligrams per milliliter, we can use this information to calculate the volume of Medrol that the nurse needs to administer. We can do this by dividing the total dosage by the concentration of the stock:
51.52 mg / 20 mg/mL = 2.576 mL.
Rounding to two significant figures, the nurse should administer 2.6 mL of Medrol to the child.
To find the number of milliliters that the nurse should administer to the child, we can follow these steps:
Step 1: Convert the weight from pounds to kilograms.
1 lb = 0.45 kg (approximately)
Therefore, the child weighs approximately 71.1 lb × 0.45 kg/lb = 31.995 kg.
Step 2: Calculate the total dosage required.
The nurse practitioner ordered a dosage of 1.6 mg/kg. Therefore, the required dosage for the child would be 1.6 mg/kg × 31.995 kg = 51.192 mg.
Step 3: Convert the dosage from milligrams to milliliters.
The stock concentration of Medrol is 20 mg/mL. To determine the volume of the medication needed, we can use the following calculation:
Volume (in mL) = Dosage (in mg) / Concentration (in mg/mL)
Therefore, the volume of medication required is 51.192 mg / 20 mg/mL = 2.56 mL.
Therefore, the nurse should administer approximately 2.56 mL of the Medrol medication to the child.