A nurse is preparing to administer cefotaxime 100 mg/kg/day IM divided in equal doses every 6 hr to a school-age child who weighs 50 lb. Available is cefotaxime injection 300 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["1.9"]
To calculate the dosage of cefotaxime, first convert the child's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The child weighs 50 lb, which is approximately 22.7 kg (50 / 2.2). The prescribed dose is 100 mg/kg/day, so the total daily dose is 2,270 mg (100 mg/kg * 22.7 kg). This total daily dose should be divided into equal doses administered every 6 hours, which means 4 doses per day. Therefore, each dose will be 567.5 mg (2,270 mg / 4). With the medication available at a concentration of 300 mg/mL, divide the single dose by the concentration to find the volume per dose: 567.5 mg / 300 mg/mL = 1.89 mL. Rounded to the nearest tenth, the nurse should administer 1.9 mL per dose.
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Related Questions
Correct Answer is ["3.8"]
Explanation
To calculate the dosage of acetaminophen for the toddler, first convert the weight from pounds to kilograms, knowing that 1 kg equals 2.2 lbs. The toddler weighs 26.4 lbs, which is approximately 12 kg (26.4 lbs ÷ 2.2 lbs/kg). The prescribed dose is 10 mg/kg, so the toddler's dose is 120 mg (12 kg x 10 mg/kg). Since the available medication is 160 mg/5 mL, divide the dose needed by the concentration to find the volume: 120 mg ÷ (160 mg/5 mL) = 3.75 mL. Therefore, the nurse should administer 3.8 mL per dose, rounding to the nearest tenth.
Correct Answer is ["4.4"]
Explanation
To calculate the dosage of amoxicillin and clavulanate for the infant, we first convert the weight from pounds to kilograms, knowing that 1 pound is approximately 0.453592 kilograms. The infant weighs 16 pounds, which is roughly 7.25748 kilograms. The prescribed dose is 30 mg/kg/day, so for the infant, it would be 30 mg/kg/day * 7.25748 kg = 217.7244 mg/day. Since the medication is to be administered every 12 hours, the daily dose should be divided into two, resulting in 217.7244 mg/day / 2 = 108.8622 mg per dose. With the medication available in a concentration of 125 mg/5 mL, we calculate the volume per dose as (108.8622 mg * 5 mL) / 125 mg = 4.354488 mL per dose. Rounding to the nearest tenth, the nurse should administer 4.4 mL per dose.
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