The healthcare provider prescribes penicillin G benzathine 1,800,000 units intramuscular (IM) for a client with a bacterial infection. The prefilled syringe is labeled, "Penicillin G benzathine 1,200,000 units/2 mL." How many mL should the nurse administer to this client? (Enter numerical value only, rounded to the nearest whole number.)

Answer and Explanation

The Correct Answer is ["3"]

Concentration of penicillin G benzathine: 1,200,000 units/2 mL (given on the syringe label)

Prescribed dose: 1,800,000 units

We need to find the volume (in mL) that delivers the prescribed dose (1,800,000 units) considering the available concentration.

Dosage calculation:

To administer the prescribed dose, we need to find the volume that contains at least 1,800,000 units.

Since the available concentration is 1,200,000 units/2 mL, one prefilled syringe provides 1,200,000 units.

We can calculate the number of syringes needed to deliver the prescribed dose:

Number of syringes = Prescribed dose (units) / Concentration per syringe (units)

Number of syringes = 1,800,000 units / 1,200,000 units/syringe

Number of syringes = 1.5 (round up to 2 since a partial dose wouldn't be sufficient)

2 mL per syringe x 2 syringes = 4 mL

However, the prefilled syringes likely come in whole-number doses. Checking the available options:

A single prefilled syringe provides 1,200,000 units (which is not enough).

Two prefilled syringes would provide a total of 2,400,000 units (more than enough).

Therefore, to ensure at least the prescribed dose is administered, the nurse should administer 3 mL.

This is achieved by using one and a half (rounded up to two) prefilled syringes.

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Correct Answer is ["0.25"]

Explanation

Here's how to calculate the volume the nurse should administer after reconstituting the medication:

Reconstitution:

The medication vial is labeled "0.3 mg with 1.2 mL of sterile water." This means adding 1.2 mL of diluent will result in a total volume of 1.2 mL solution.

Important Note:

The concentration of the medication after reconstitution is not explicitly provided on the label.

We cannot directly calculate the volume to administer based solely on the prescribed dose (0.0625 mg) and the unknown concentration.

Scenario:

In real-world practice, nurses rely on the medication information sheet or the manufacturer's label for dilution instructions and the final concentration after reconstitution.

This information is crucial for calculating the accurate volume to administer the prescribed dose.

Assuming the medication information sheet specifies:

After reconstitution with 1.2 mL diluent, the final concentration is 0.25 mg/mL.

Calculation (based on the assumed concentration):

Prescribed dose: 0.0625 mg

Volume to administer (mL) = Dose (mg) / Concentration (mg/mL)

Volume to administer (mL) = 0.0625 mg / 0.25 mg/mL

Volume to administer (mL) = 0.25 mL (round to nearest hundredth)

Therefore, based on the assumed concentration after reconstitution (0.25 mg/mL), the nurse should administer 0.25 mL to the client.

Correct Answer is ["3600"]

Explanation

Here's how to calculate the maximum daily dose of acetaminophen for the child:

Calculate the maximum dose per administration:

Maximum dose per kg per administration = 15 mg/kg (given)

Child's weight = 40 kg (given)

Since this is a PRN medication (given as needed), we will calculate the maximum dose per administration based on the prescribed dosage.

Maximum dose per administration = 15 mg/kg/dose * 40 kg

Maximum dose per administration = 600 mg (round to nearest whole number)

Calculate the number of administrations in a 24-hour period (maximum):

Frequency: Every 4 to 6 hours PRN (given)

Since this is a PRN medication, we will assume the maximum frequency (every 4 hours) for calculating the maximum daily dose.

Number of administrations (maximum) = 24 hours / Frequency (hours/administration)

Number of administrations (maximum) = 24 hours / 4 hours/administration

Number of administrations (maximum) = 6 administrations

Calculate the maximum daily dose:

Maximum daily dose = Maximum dose per administration x Number of administrations (maximum)

Maximum daily dose = 600 mg/administration * 6 administrations

Maximum daily dose = 3600 mg

Therefore, the maximum daily dose the nurse should administer is 3600 mg.

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Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is ["0.25"]

Explanation

A child who weighs 40 kg receives a prescription for acetaminophen 15 mg/kg/dose PO every 4 to 6 hours PRN for fever. What is the maximum daily dose the nurse should administer? (Enter the numerical value only.)

Correct Answer is ["3600"]

Explanation

A client scheduled for coronary artery bypass surgery is to receive an intravenous (IV) infusion of 1 gram cefazolin in 50 ml 0.9% sodium chloride, USP over 30 minutes. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only, as a whole number.)

Heparin 5,000 units IV is prescribed as a loading dose, to be administered over 5 minutes for a client with thrombophlebitis. The vial is labeled, "10,000 units/mL." How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

A premature infant with a birth weight of 1,200 grams is receiving beractant 120 mg intratracheal every 6 hours. Single use vials of beractant are labeled, "100 mg/4 mL. How many mL should the nurse administer? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)

The healthcare provider prescribes acyclovir 800 mg by mouth (PO) every 6 hours for an adolescent with chicken pox. The medication is available in 400 mg tablets PO. How many tablets should the nurse administer to the client every 24 hours? (Enter the numeric value only)