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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 ["50"]

Explanation

First, we need to find out how many mL/hr the infusion pump is currently delivering.

Given:

The client is receiving 1,800 units/hour of heparin.

The available medication is 20,000 units/500 mL.

We can set up the proportion as follows:

1,800units/ xmL ​= 20,000units​/500mL

Solving for x gives us the volume in mL that the infusion pump is currently delivering per hour.

Cross-multiplying and solving for x:

X = 1,800units×500mL​/20,000units

After performing the calculation, we find that x equals 45 mL/hr.

Given that the healthcare provider prescribes an increase of 5 mL/hr in the IV rate, the nurse should set the infusion pump to deliver:

Newrate(mL/hr) = Currentrate(mL/hr) + Increase(mL/hr) = 45mL/hr+5mL/hr

After performing the calculation, we find that the new rate equals 50 mL/hr.

So, the nurse should set the infusion pump to deliver 50 mL/hr.

Correct Answer is ["3"]

Explanation

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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