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
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Hypoglycemia, or low blood sugar, is a concern in newborns, but it is not the most immediate concern within the first minutes after delivery.
Choice B rationale
While newborns do have certain bleeding tendencies due to immature clotting mechanisms, this is not the immediate priority in the first minutes after birth.
Choice C rationale
The priority issue that the nurse should address to ensure the newborn’s survival is heat loss.
Newborns are at high risk of heat loss and maintaining their body temperature is crucial. This is because they have a large body surface area relative to their weight and their temperature regulation mechanism is not fully developed.
Choice D rationale
Fluid balance is important in newborns, but it is not the immediate concern in the first minutes after birth. The initial focus is on establishing respiration and maintaining body temperature.
Correct Answer is D
Explanation
Choice A rationale
Obtaining blood cultures is not the first action to take in this situation. Blood cultures would be used to identify a bloodstream infection, which is not indicated by the client’s current symptoms.
Choice B rationale
Covering the lesion with a dressing is not the appropriate action. Herpes lesions are highly contagious, and covering them does not eliminate the risk of transmission during vaginal delivery.
Choice C rationale
Administering penicillin is not the appropriate action. Penicillin is an antibiotic used to treat bacterial infections, not viral infections like herpes.
Choice D rationale
Preparing for a cesarean section is the correct action. A cesarean section is recommended for women with active genital herpes lesions or prodromal symptoms at the time of labor to prevent transmission of the virus to the newborn during delivery.
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