A child who weighs 55 pounds receives a prescription for isoniazid 10 mg/kg/day by mouth (PO) once a day.
The bottle is labeled, “Isoniazid Oral Solution, USP 50 mg per 5 mL.”. How many mL should the nurse administer? . .
The Correct Answer is ["25"]
Answer and explanation
Step 1 is to convert the child’s weight from pounds to kilograms since the dosage is prescribed in mg/kg. We know that 1 kg is approximately 2.2 lbs. So, the child’s weight in kg is 55 lbs ÷ 2.2 = 25 kg (rounded to the nearest whole number for simplicity).
Step 2 is to calculate the total daily dosage. The prescription is for isoniazid 10 mg/kg/day. So, the total daily dosage in mg is 10 mg/kg/day × 25 kg = 250 mg/day.
Step 3 is to calculate the volume of the oral solution to administer. The bottle is labeled, “Isoniazid Oral Solution, USP 50 mg per 5 mL.”. So, the volume in mL to administer is (250 mg/day ÷ 50 mg) × 5 mL = 25 mL. Therefore, the nurse should administer 25 mL of the Isoniazid Oral Solution, USP 50 mg per 5 mL, once a day.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
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Correct Answer is A
Explanation
Flaring of the nares is a sign of respiratory distress in children. It indicates that the child is working harder to breathe.
Choice B rationale
Bilateral bronchial breath sounds are normal and do not indicate acute respiratory distress.
Choice C rationale
Diaphragmatic respirations are normal in children and do not indicate acute respiratory distress.
Choice D rationale
A resting respiratory rate of 35 breaths/minute is within the normal range for a preschoolaged child and does not indicate acute respiratory distress.
Correct Answer is D
Explanation
Choice A rationale
While multiple gestation can cause an increase in maternal serum alpha-fetoprotein (MS-AFP) levels, it is not the most likely cause of an elevated MS-AFP level at 17 weeks.
Choice B rationale
Fetal hypoxia, or lack of oxygen to the fetus, is not typically associated with an increase in MSAFP levels.
Choice C rationale
Down syndrome is typically associated with lower, not higher, levels of MS-AFP891011.
Choice D rationale
An elevated level of MS-AFP at 17 weeks is most commonly associated with a neural tube defect. Neural tube defects are birth defects of the brain, spine, or spinal cord that occur during the first month of pregnancy.
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