A nurse is preparing to administer ampicillin 500 mg IM every 6 hr. Available is ampicillin 500 mg vial. The package insert instructs adding 1.8 mL of sterile water to yield ampicillin 250 mg/mL. How many mL should the nurse administer per dose?
(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation

The Correct Answer is ["2"]

To calculate the amount of ampicillin the nurse should administer per dose in milliliters (mL) for a 500 mg IM dose, we can use the following steps:

Given:

Ampicillin dose: 500 mg

Available concentration after reconstitution: 250 mg/mL

Volume of sterile water to be added: 1.8 mL

Step 1: Calculate the amount of ampicillin to be administered per dose in mL

First, we need to reconstitute the ampicillin vial to yield the desired concentration of 250 mg/mL.

The concentration after reconstitution is 250 mg/mL, and the total dose required is 500 mg. Therefore, the nurse needs to administer:

Volume = Ampicillin dose / Concentration

Volume = 500 mg / 250 mg/mL

Volume = 2 mL

Rounding to the nearest whole number:

Volume = 2 mL

Therefore, the nurse should administer 2 mL of the reconstituted ampicillin solution per dose.

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Free Nursing Study Resources

Correct Answer is ["8"]

Explanation

To calculate the amount of belimumab that the nurse should administer, we can use the following steps:

Convert the patient's weight from pounds to kilograms.

Multiply the patient's weight in kilograms by the dosage of belimumab (10 mg/kg) to find the total dosage required.

Determine the volume of the drug needed using the concentration of the available belimumab solution.

Given:

Patient's weight = 136 lb

Dosage of belimumab = 10 mg/kg

Available concentration of belimumab = 80 mg/mL

Let's calculate step by step:

Convert patient's weight from pounds to kilograms:

Patient's weight in kg = 136 lb × (1 kg / 2.2 lb) ≈ 61.8 kg

Calculate the total dosage required:

Total dosage = 10 mg/kg × 61.8 kg ≈ 618 mg

Determine the volume of the drug needed using the concentration of the available belimumab solution:

Volume of drug = Total dosage / Concentration of belimumab

Volume of drug = 618 mg / 80 mg/mL ≈ 7.7 mL

Rounding to the nearest whole number, the nurse should administer 8 mL of the belimumab.

Correct Answer is ["150"]

Explanation

To calculate the IV pump rate for the 0.9% sodium chloride 1,200 mL IV to infuse over 8 hours, we can use the following formula:

IV pump rate (mL/hr) = Total volume (mL) / Time (hr)

Using the given values:

Total volume = 1,200 mL

Time = 8 hours

Plugging these values into the formula:

IV pump rate = 1,200 mL / 8 hr

IV pump rate = 150 mL/hr

So, the nurse should set the IV pump to deliver 150 mL/hr to infuse the 1,200 mL of 0.9% sodium chloride over 8 hours.

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer belimumab 10 mg/kg via intermittent IV bolus to a client who weighs 136 lb. Available is belimumab 80 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["8"]

Explanation

A nurse is preparing to administer 0.9% sodium chloride 1,200 mL IV to infuse over 8 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["150"]

Explanation

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