An infant who weighs 22 pounds receives a prescription for amoxicillin 20 mg/kg/day by mouth in divided doses every 8 hours. The bottle is labeled, "Amoxicillin for Oral Suspension, USP 250 mg per 5 mL." How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is necessary, round to the nearest tenth.)
The Correct Answer is ["1.3"]
1. Convert the infant's weight from pounds to kilograms. We can use the conversion factor 1 kg
= 2.2 lb. So, 22 lb x (1 kg / 2.2 lb) = 10 kg.
2. Calculate the total daily dose of amoxicillin for the infant. We can use the formula D = d x W, where D is the total daily dose, d is the dose per kg per day, and W is the weight in kg. So, D = 20 mg x 10 kg = 200 mg.
3. Calculate the single dose of amoxicillin for the infant. We can divide the total daily dose by the number of doses per day. Since the prescription is for every 8 hours, there are 3 doses per day. So, 200 mg / 3 = 66.67 mg.
4. Calculate the volume of amoxicillin suspension for the single dose. We can use the ratio of the concentration of the suspension, which is 250 mg per 5 mL. So, 66.67 mg x (5 mL / 250 mg) =
1.33 mL.
5. Round the volume to the nearest tenth= 1.3 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["9"]
Explanation
Here are the steps you can follow to calculate the infusion pump flow rate:
Step 1: Calculate the prescribed dose in mcg/min
- Dose per weight: 2 mcg/kg/min * 60 kg = 120 mcg/min
Step 2: Convert the concentration in the IV bag to mcg/mL
- Convert mg to mcg: 200 mg * 1000 mcg/mg = 200,000 mcg
- Concentration: 200,000 mcg / 250 mL = 800 mcg/mL
Step 3: Calculate the flow rate in mL/min
- Flow rate: 120 mcg/min / 800 mcg/mL = 0.15 mL/min
Step 4: Convert the flow rate to mL/hour
- Hour conversion: 0.15 mL/min * 60 min/hour = 9 mL/hour
Therefore, the nurse should program the infusion pump to deliver 9 mL/hour.
Correct Answer is B
Explanation
Administering a large volume of medication in a single injection is not recommended for infants as it can lead to discomfort, tissue trauma, and potential complications such as muscle fibrosis or nerve injury. Dividing the medication into two injections with volumes under 1 mL is a common practice for infants and can help minimize discomfort and complications.
In addition, the nurse should select an appropriate needle size and injection site based on the infant's size and age. A 22 gauge 1 1/2 inch (3.8 cm) needle is too large for an infant and may cause discomfort and tissue damage. The nurse should use a smaller gauge needle and choose an appropriate injection site, such as the vastus lateralis muscle in the thigh or the dorsogluteal muscle in the buttocks, based on the infant's age and size.
Finally, administering an injection into the deltoid muscle is not recommended for infants as this muscle is not fully developed until later in childhood. Using a quick dart-like motion to inject into the dorsogluteal site is also not recommended as it can cause tissue damage and discomfort. Instead, the nurse should use a slow, steady technique to administer the injection while ensuring the infant is held securely by the parent or another caregiver.
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