A physician orders Garamycin (gentamicin) 4 mg/kg/dose IV piggyback every 12 hours for a newborn weighing 7 lb, 11.2 oz. After reconstitution, the dosage is 20 mg/10 mL.
How many milliliters should the nurse administer to the patient?

1.4 mL

14 mL

7 mL

0.7 mL

Answer and Explanation

The Correct Answer is C

To answer this question, the nurse needs to perform the following steps:

1) Convert the patient's weight from pounds and ounces to kilograms, using the conversion factor of 1 pound = 0.45359237 kilograms¹². To do this, first convert the ounces to a fraction of a pound by dividing by 16, then add this fraction to the pounds, and then multiply by the conversion factor. For example:

7 lb, 11.2 oz = 7 + (11.2 / 16) lb
= 7.7 lb
= 7.7 × 0.45359237 kg
= 3.492 kg

2) Calculate the dose of Garamycin in milligrams, using the prescribed dose of 4 mg/kg and the patient's weight in kilograms. To do this, simply multiply the dose per kilogram by the weight in kilograms. For example:

4 mg/kg × 3.492 kg = 13.968 mg

3) Calculate the volume of Garamycin in milliliters, using the reconstituted dosage of 20 mg/10 mL and the dose in milligrams. To do this, use a proportion to find the unknown volume that corresponds to the known dose. For example:

20 mg / 10 mL = 13.968 mg / x mL Cross-multiply and solve for x: 20x = 139.68

x = 6.984 mL
x =7 mL

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Correct Answer is B

Explanation

One ﬂuid ounce is equal to **29.57353 milliliters**¹²³. To convert ﬂuid ounces to milliliters, you can multiply the value in ﬂuid ounces by 29.57353. For example, 1 ﬂuid ounce x 29.57353 milliliters = 29.57353 milliliters.

Therefore, to convert 100 ﬂ oz of ﬂuids to milliliters, you can multiply 100 by 29.57353. The answer is
**2957.353 milliliters**. This is the amount of ﬂuids that the nurse should provide to the client with renal calculi.

The other options are not correct because they do not match the calculated amount of ﬂuids that the client needs. Option a is wrong because it is too litle ﬂuids, which could result in dehydration or inadequate ﬂushing of the urinary tract. Option c is wrong because it is too much ﬂuids, which could result in ﬂuid overload or electrolyte imbalance. Option d is wrong because it is not a volume but a frequency, and it is also too litle ﬂuids for the client's condition.

A. 1.26 mL/hr B. 126 mL/hr C. 1260 mL/hr D. 12.6 mL/hr

Correct Answer is D

Explanation

To answer this question, we need to calculate the infusion rate in mL per hour by using the following formula²:

Infusion rate (mL/h) = Dose (mcg/kg/min) × Weight (kg) × 60 min/h × Volume (mL) / Concentration (mcg/mL)

In this case, the infusion rate is:

Infusion rate (mL/h) = 3 mcg/kg/min × 70 kg × 60 min/h × 250 mL / 2500 mg

We need to convert lb to kg by dividing by 2.2

Infusion rate (mL/h) = 3 mcg/kg/min × (154 lb / 2.2 kg/lb) × 60 min/h × 250 mL / 2500 mg

We need to convert mg to mcg by multiplying by 1000:

Infusion rte (mL/h) = 3 mcg/kg/min × (154 lb / 2.2 kg/lb) × 60 min/h × 250 mL / (2500 mg × 1000 mcg/mg)

We can simplify the equation by canceling out some units and numbers:

Infusion rate (mL/h) = 3 × 154 × 250 / (2.2 × 2500 × 1000)

We can use a calculator to get the final answer:

Infusion rate (mL/h) = 12.6363636363636 mL/h

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A physician orders Garamycin (gentamicin) 4 mg/kg/dose IV piggyback every 12 hours for a newborn weighing 7 lb, 11.2 oz. After reconstitution, the dosage is 20 mg/10 mL. How many milliliters should the nurse administer to the patient?

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Correct Answer is B

Explanation

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Correct Answer is D

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A physician orders Garamycin (gentamicin) 4 mg/kg/dose IV piggyback every 12 hours for a newborn weighing 7 lb, 11.2 oz. After reconstitution, the dosage is 20 mg/10 mL.
How many milliliters should the nurse administer to the patient?