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A nurse is caring for a 1-month-old infant who weighs 3500g and is prescribed a dose of cephazolin 50 mg/kg by intermittent IV bolus three times daily. How many mg should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do 3 m anot use a trailing zero.)

Answer and Explanation

The Correct Answer is ["175"]

Step 1: Convert the weight of the infant from grams to kilograms.

1 kilogram = 1000 grams

So, 3500 grams = 3500/1000 = 3.5 kilograms

Step 2: Calculate the dosage based on the infant's weight and the prescribed dose.

Dosage = Weight (kg) x Prescribed dose (mg/kg)

Dosage = 3.5 kg x 50 mg/kg

Dosage = 175 mg

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Correct Answer is B

Explanation

A) The nurse administers the prescribed dosage: Administering the prescribed dosage of 100 mg every 8 hours might seem appropriate at first glance, but it is crucial to evaluate whether this dosage falls within the recommended dosage range based on the child’s weight. Without checking the dosage range, there could be a risk of underdosing or overdosing.

B) The nurse determines the prescription is insufficient to achieve the desired effect: To evaluate this, calculate the total daily dosage based on the prescribed regimen and compare it to the recommended range. For a toddler weighing 20 kg, the recommended daily dosage range is 20 to 25 mg/kg/day. This equates to 400 mg to 500 mg per day (20 kg x 20 mg = 400 mg; 20 kg x 25 mg = 500 mg). The prescribed dosage is 100 mg every 8 hours, which totals 300 mg per day (100 mg x 3 doses). Therefore, the prescribed dosage falls below the recommended range, making it insufficient to achieve the desired therapeutic effect.

C) The nurse determines the prescription is above the recommended dosage range: This option is incorrect as the calculated daily dose of 300 mg is actually below the recommended range of 400 to 500 mg per day. Therefore, the prescription does not exceed the recommended dosage.

D) The nurse contacts the pharmacist to adjust the prescribed dosage: While it is important to contact the pharmacist or healthcare provider when there are concerns about dosage, in this scenario, the primary issue is that the dosage is insufficient rather than an adjustment made by the pharmacist. The nurse should first determine if the dosage falls within the recommended range before deciding to make contact for adjustments.

Correct Answer is ["100"]

Explanation

Here's how to calculate the IV pump rate:

1. Calculate the total infusion time in hours:
30 minutes / 60 minutes/hour = 0.5 hours

2. Calculate the infusion rate:
Total volume (mL) / Infusion time (hours) = Infusion rate (mL/hr)
50 mL / 0.5 hours = 100 mL/hr

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer amoxicillin 100 mg PO every 8 hr to a toddler who weighs 20 kg. The recommended dosage is 20 to 25mg/kg/day. Which of the following actions by the nurse is appropriate?

Correct Answer is B

Explanation

Correct Answer is ["100"]

Explanation

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