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A nurse has to administer IV ampicillin every 6 hours to a child who weighs 10.4 kg. The prescribed dose is 150 mg/kg/day.
What is the amount of ampicillin in one dose?

A.

390 mg

B.

27 mg

C.

1560 mg

D.

260 mg

Answer and Explanation

The Correct Answer is A

The amount of ampicillin in one dose is 390 mg.
 
This answer is correct because it is based on a series of multiplication and division calculations. The nurse should follow these steps to determine the amount of ampicillin in one dose:

1) Multiply the prescribed dose per kilogram per day by the child's weight in kilograms to get the total dose per day in milligrams, as follows:

150 mg/kg/day x 10.4 kg = 1560 mg/day

Therefore, the child needs 1560 mg of ampicillin per day.

2) Divide the total dose per day by the number of doses per day to get the amount of each dose in milligrams, as follows:

1560 mg/day / 4 doses/day = 390 mg/dose

Therefore, the amount of ampicillin in one dose is 390 mg.


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Related Questions

Correct Answer is D

Explanation

To find the milliliters to administer, you need to use the formula for dosage calculation:


Volume (mL) = Dose ordered (mg) / Dose available (mg) x Volume available (mL)


Since the dose ordered is 275 mg, the dose available is 500 mg, and the volume available is 2 mL, plug in these values into the formula:


Volume (mL) = 275 mg / 500 mg x 2 mL


Simplify and solve for the volume:


Volume (mL) = 1.1 mL


Therefore, the nurse should administer **1.1 mL** of Primaxin to the patient.

Correct Answer is B

Explanation

Dextrose 5% in water (D5W) is an IV fluid that contains **5 grams of dextrose** per 100 mL of water². To calculate how many grams of dextrose are in 500 mL of D5W, you can use a simple proportion:

5 g / 100 mL = x g / 500 mL

Cross-multiply and solve for x:

x = (5 g * 500 mL) / 100 mL

x = 25 g

Therefore, there are **25 grams of dextrose** in 500 mL of D5W.

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