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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.)
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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Related Questions

Correct Answer is ["0.8"]

Explanation

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

Concentration of epoetin alfa: 10,000 units/mL (given on the vial label)

Prescribed dose: 8,200 units

We need to find the volume (in mL) that contains the prescribed dose (8,200 units) of epoetin alfa.

Dosage calculation:

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

Volume to administer (mL) = 8,200 units / 10,000 units/mL

Volume to administer (mL) = 0.82 mL (round to nearest tenth as requested)

Therefore, the nurse should administer 0.8 mL.

Correct Answer is ["42"]

Explanation

Here's how to calculate the infusion rate (gtt/min) for the nurse to regulate:

1. Volume of azithromycin solution:

Volume = 500 mL (given)

2. Infusion duration:

Duration = 2 hours (given)

3. IV administration set gtt/mL:

Rate (gtt/mL) = 10 gtt/mL (given)

4. We need to find the rate (gtt/min) at which the solution should infuse to deliver the total volume (500 mL) over the specified duration (2 hours).

Steps:

a. Convert infusion duration from hours to minutes:

Duration (minutes) = Duration (hours) x Minutes per hour

Duration (minutes) = 2 hours * 60 minutes/hour

Duration (minutes) = 120 minutes

b. Calculate the total number of drops to be infused:

Total drops = Volume (mL) x Rate (gtt/mL)

Total drops = 500 mL * 10 gtt/mL

Total drops = 5,000 drops

c. Calculate the infusion rate (gtt/min):

Infusion rate (gtt/min) = Total drops / Duration (minutes)

Infusion rate (gtt/min) = 5,000 drops / 120 minutes

Infusion rate (gtt/min) = 41.67 gtt/min (round to nearest whole number as requested)

Therefore, the nurse should regulate the infusion at approximately 42 gtt/min.

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