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 ["10"]
Explanation
To administer the correct dose of methylphenidate, which is 10 mg, when the available oral solution concentration is 5 mg per teaspoon, the nurse needs to calculate the volume to administer. One teaspoon is equivalent to 5 milliliters (mL). Since the desired dose is 10 mg, and the available solution has a concentration of 5 mg per teaspoon, the nurse would need two teaspoons to make up the 10 mg dose. Therefore, the nurse should administer 10 mL of the methylphenidate oral solution.
Correct Answer is ["1"]
Explanation
The conversion of milliliters to teaspoons is a common calculation in medical dosing. For the administration of 5 mL of digoxin elixir PO, the equivalent in teaspoons would be approximately 1.01442 teaspoons. When rounding to the nearest whole number, as per medical dosing guidelines which often require precise measurements to ensure safety, the amount would be 1 teaspoon. It's important to use a leading zero if it applies to indicate less than one, and not to use a trailing zero as it could be mistaken for a larger dose. Therefore, the nurse should recognize that 5 mL is equivalent to 1 teaspoon.
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