The healthcare provider prescribes cyanocobalamin injection 100 mcg IM every 3 days for a client with pernicious anemia. The vial is labeled, "1 mg/mL." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation

The Correct Answer is ["0.1"]

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

1. Dose of cyanocobalamin (vitamin B12): 100 mcg

2. Concentration of cyanocobalamin in the vial: 1 mg/mL (given on the vial label)

We need to find the volume (in mL) that contains the prescribed dose (100 mcg) of cyanocobalamin.

Calculation:

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

Note: Since both the medication dose and concentration are given in mcg units, we can directly perform the calculation without converting units.

Volume to administer (mL) = 100 mcg / 1 mg/mL

Conversion:

1 mg is equal to 1000 mcg. Therefore, 1 mg/mL is the same as 1000 mcg/mL.

Volume to administer (mL) = 100 mcg / (1000 mcg/mL)

Volume to administer (mL) = 0.1 mL (round to nearest tenth as requested)

Therefore, the nurse should administer approximately 0.1 mL of the cyanocobalamin injection.

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Correct Answer is ["100"]

Explanation

Here's how to calculate the infusion rate (mL/hour) for the nurse to administer cefazolin:

We know:

Total volume of solution: 50 mL (given)

Dose of cefazolin: 1 gram (given) = 1000 milligrams (since 1 gram = 1000 milligrams)

Infusion duration: 30 minutes (given) = 0.5 hours (convert minutes to hours by dividing by 60)

We need to find:

Infusion rate (mL/hour)

Calculation:

Calculate the concentration of cefazolin in the solution (not required, but helpful to understand):

We aren't directly given the concentration, but we can see that 1 gram of cefazolin is delivered in 50 mL. Therefore, the concentration is:

Concentration = Dose (mg) / Volume (mL)

Concentration = 1000 mg / 50 mL

Concentration = 20 mg/mL

Calculate the infusion rate based on the total volume and duration:

Infusion rate (mL/hour) = Total volume (mL) / Infusion time (hours)

Infusion rate (mL/hour) = 50 mL / 0.5 hours

Infusion rate (mL/hour) = 100 mL/hour

Since we typically round infusion rates to whole numbers for ease of use with infusion pumps, the nurse should program the pump to deliver 100 mL/hour.

Correct Answer is ["0.5"]

Explanation

Here's how to calculate the volume (mL) of filgrastim the nurse should administer:

1. Client weight conversion:

Client weight: 132 pounds

Medication dosage is based on weight per kilogram (kg).

Conversion factor: 1 kg = 2.205 lbs

Client weight (kg): 132 pounds / 2.205 lbs/kg = 60 kg (round to nearest whole number)

2. Filgrastim dosage:

Prescribed dose: 5 mcg/kg/day (given)

3. Daily filgrastim amount:

Daily dose (mcg) = Dose (mcg/kg/day) x Client weight (kg)

Daily dose (mcg) = 5 mcg/kg/day * 60 kg

Daily dose (mcg) = 300 mcg (round to nearest whole number)

4. Filgrastim vial concentration:

The medication is available in 480 mcg/0.8 mL. This indicates the concentration of filgrastim in the vial is 480 mcg per 0.8 mL.

5. We need to find the volume (mL) to administer that provides the daily dose (300 mcg) based on the medication concentration (480 mcg/0.8 mL).

Volume to administer (mL) = Daily dose (mcg) / Concentration (mcg/mL)

Volume to administer (mL) = 300 mcg / (480 mcg/0.8 mL)

To perform the division accurately, we need the concentration in the same units (mcg/mL) for both the numerator and denominator.

We can achieve this by multiplying the vial concentration (480 mcg/0.8 mL) by a factor that converts the denominator (0.8 mL) to 1 mL.

Factor = 1 mL / 0.8 mL = 1.25 (since 1.25 x 0.8 mL = 1 mL)

Apply the factor to adjust the concentration in the denominator:

Adjusted concentration = 480 mcg/0.8 mL * 1.25 = 600 mcg/mL

Now, calculate the volume to administer:

Volume to administer (mL) = 300 mcg / (600 mcg/mL)

Volume to administer (mL) = 0.5 mL (round to nearest tenth as requested)

Therefore, the nurse should administer approximately 0.5 mL of filgrastim subcutaneously.

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The healthcare provider prescribes cyanocobalamin injection 100 mcg IM every 3 days for a client with pernicious anemia. The vial is labeled, "1 mg/mL." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

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Naxlex Comprehensive Predictor Exams

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.)

Correct Answer is ["100"]

Explanation

Correct Answer is ["0.5"]

Explanation

A client with an extrapyramidal reaction receives a prescription for diphenhydramine 35 mg IM. The medication is supplied as 50 mg/mL in a 1 mL prefilled single use syringe. How many mL should the nurse give? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)

The healthcare provider prescribes ganciclovir 375 mg intravenously (IV) every 12 hours to infuse over 90 minutes. The pharmacy delivers ganciclovir 375 mg in a 150 mL IV bag. How many mL/hour should the nurse program the infusion pump? (Enter a whole number only.)

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.)