A patient receives a prescription for warfarin 2 mg IM daily. The pharmacy delivers a vial labeled, warfarin 5 mg/single-use vial. The instructions read, reconstitute with 2.7 mL of sterile water for injection to yield 2 mg/mL. How many mL should the nurse administer? (Enter the numerical value only.)

Answer and Explanation

The Correct Answer is ["1 mL"]

First, we need to find out how many mg of warfarin are in one vial. Since the vial is labeled 5 mg/single-use, we can assume that it contains 5 mg of warfarin.

Next, we need to find out how many mL of solution are in one vial. Since the instructions say to reconstitute with 2.7 mL of sterile water for injection to yield 2 mg/mL, we can use the following formula:

Amount of solution= amount of water + amount of warfarin

Substituting the given values, we get:

Amount of solution = 2.7 + 5 =7.7 mL

Now, we need to find out how many mL of solution contain 2 mg of warfarin, which is the prescribed dose for the patient. We can use the following formula:

mL of solution = mg of warfarin/ concentration of warfarin

Substituting the given values, we get:

mL of solution = 2/2 = 1 mL

Therefore, the nurse should administer 1 mL of solution to the patient.

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Free Nursing Study Resources

Correct Answer is ["1200"]

Explanation

To find the answer, we can use the following formula:

(units of heparin) = (mL/hour) x (hours) x (units per mL)

Substituting the given values, we get:

(units of heparin) = (25) x (12) x (20,000 / 500)

Simplifying, we get:

(units of heparin) = (25) x (12) x (40)

(units of heparin) = 1200

Therefore, the client should receive 1200 units of heparin in 12 hours.

Correct Answer is ["8.3"]

Explanation

The correct answer is 8.3 hours. To find the answer, we can use the following formula:

(hours) = (mL of IV) / (mL/hour)

Substituting the given values, we get:

(hours) = (500) / (60)

Simplifying, we get:

(hours) = 8.333

(rounded hours) = 8.3

Therefore, the IV should infuse for 8.3 hours.

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Naxlex Comprehensive Predictor Exams

A patient with deep vein thrombosis (DVT) is receiving a continuous infusion of Heparin Sodium 20,000 Units in 5% Dextrose Injection 500 mL at the rate of 25 mL/hour. How many units of heparin should the client receive in 12 hours? (Enter numeric value only.)

Correct Answer is ["1200"]

Explanation

The nurse is initiating a 500 mL IV of normal saline at 60 mL/hour for a client with heart failure. How many hours should the IV infuse? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Correct Answer is ["8.3"]

Explanation

A client receives a prescription for amoxicillin 2 g/clavulanate 125 mg by mouth every 12 hours for 10 days. The medication is available in 1000 mg/62.5 mg extended release tablets. How many tablets should the nurse administer? (Enter numerical value only.)

A 4-year-old is admitted with croup and receives a prescription for a single dose of dexamethasone 0.6 mg/kg IM. The child weighs 35 pounds. How many mg should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest whole number.)

A patient is receiving a secondary infusion of azithromycin 500 mg in 500 mL of normal saline (NS) to be infused over 2 hours. How many mL/hour should the nurse program the infusion pump? (Enter numerical value only.)

The healthcare provider prescribes lamivudine oral solution 150 mg twice daily for a client who is HIV positive. The available bottle contains 240 mL of lamivudine labeled, "10 mg/mL." How many mL should the nurse administer in a 24 hour period? (Enter numeric value only.)