A patient is receiving an IV of esmolol 2.5 grams in 250 mL of D5W (dextrose 5% in water) infusing at 200 micrograms/kilogram/minute. The patient weighs 110 lb. What rate (in mL/hr) should the nurse program into the IV pump to deliver this dose?

45 mL/hr

60 mL/hr

75 mL/hr

90 mL/hr

Answer and Explanation

The Correct Answer is C

To calculate the rate (in mL/hr) at which the IV pump should be programmed to deliver the dose of esmolol, we can use the following formula:

Rate (mL/hr) = (Dose × Patient weight × 60) / (Concentration × Time)

Given:

Dose = 2.5 grams Patient weight = 110 lb Concentration = 250 mL

Time = 1 hour (since the dose is given per hour)

Converting the patient's weight from pounds to kilograms:

Patient weight = 110 lb ÷ 2.2046 = 49.9 kg

Substituting the values into the formula:

Rate (mL/hr) = (2.5 g × 49.9 kg × 60) / (250 mL × 1)

Simplifying the equation:

Rate (mL/hr) = (2.5 × 49.9 × 60) / 250

Rate (mL/hr) = 74.85

Rounding to the nearest whole number, the nurse should program the IV pump to deliver 75 mL/hr.

Therefore, the correct answer is c. 75 mL/hr.

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Correct Answer is A

Explanation

To find the rate in mL/hr, you need to calculate the following:

- The concentration of nitroglycerin in the IV solution in mcg/mL
- The infusion rate in mL/hr using the formula: Infusion rate (mL/h) = (Dose (mcg/min) x 60 min/h) / Concentration (mcg/mL)

First, convert the concentration of nitroglycerin from mg to mcg by multiplying by 1000:

125 mg x 1000 = 125,000 mcg

Then, divide the amount of nitroglycerin by the volume of the IV solution to get the concentration in mcg/mL:

125,000 mcg / 500 mL = 250 mcg/mL

Next, plug in the values into the formula for infusion rate:

Infusion rate (mL/h) = (42 mcg/min x 60 min/h) / 250 mcg/mL

Simplify and solve for the infusion rate:

Infusion rate (mL/h) = 10.08 mL/h

Therefore, the nurse should program the IV pump to deliver **10.1 mL/h** to infuse nitroglycerin at 42 mcg/minute.

A. 20 mL B. 60 mL C. 30 mL D. 10 mL

Correct Answer is B

Explanation

The nurse should administer 60 mL of the supplement in a day.

This answer is correct because it is based on a simple unit conversion and multiplication calculation. The nurse can convert 60 mEq to 20 mL by using the ratio given on the botle label, as follows:

30 mEq / 10 mL = 60 mEq / x mL

Cross-multiplying and solving for x gives:

x = 20 mL

Therefore, the nurse should administer 20 mL of the supplement to deliver 60 mEq of the medication to the patient. Since the order is for three times a day, the nurse should multiply 20 mL by 3 to get the total daily dose, which is 60 mL.

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A patient is receiving an IV of esmolol 2.5 grams in 250 mL of D5W (dextrose 5% in water) infusing at 200 micrograms/kilogram/minute. The patient weighs 110 lb. What rate (in mL/hr) should the nurse program into the IV pump to deliver this dose?

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Naxlex Comprehensive Predictor Exams

Nitroglycerin 125 mg diluted in 500 mL of D5W (dextrose 5% in water) is infusing at a rate of 42 mcg/minute for a patient with chest pain. What rate (in mL/hr) should the nurse program into the IV pump to deliver this dose? Round your answer to the nearest tenth.

Correct Answer is A

Explanation

A nurse is instructed to administer 60 mEq of an iron supplement to an anemic client three times a day. The iron supplement botle contains 30 mEq in 10 mL. How many milliliters of the supplement should the nurse administer in a day?

Correct Answer is B

Explanation

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