A nurse is preparing to administer digoxin 12 mcg/kg/day PO to divide equally every 12 hr to a school-age child who weighs 66 lb. Available is digoxin elixir 0.05 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 ["3.6"]
To calculate the dosage of digoxin for the child, first convert the child's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The child weighs 66 pounds, which is approximately 30 kilograms (66 ÷ 2.2). The prescribed dose is 12 micrograms per kilogram per day, which equals 360 micrograms per day (12 mcg × 30 kg). Since the dose is divided every 12 hours, the child should receive 180 micrograms every 12 hours. The digoxin elixir is available at a concentration of 0.05 mg/mL, which is the same as 50 micrograms per milliliter. To find out how many milliliters to administer per dose, divide the dose in micrograms by the concentration: 180 mcg ÷ 50 mcg/mL equals 3.6 mL.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. A weight loss of 10% or more in infants within a short period is indicative of severe dehydration. The significant weight loss from 5 kg to 4.3 kg confirms this diagnosis.
B. The risk for fluid volume deficit would be noted if there were signs of potential dehydration, but in this case, the infant has already lost a significant amount of weight, confirming severe dehydration.
C. Failure to thrive is a diagnosis related to insufficient weight gain over time, rather than acute weight loss due to dehydration.
D. Malabsorption syndrome could contribute to chronic weight loss, but the acute loss in this case is more likely due to dehydration from diarrhea.
Correct Answer is C
Explanation
A. A stool fat content analysis can indicate malabsorption issues but is not definitive for cystic fibrosis.
B. Pulmonary function tests assess lung function but do not confirm cystic fibrosis.
C. The sweat chloride test is the primary diagnostic test for cystic fibrosis, as it measures the amount of chloride in sweat, which is elevated in this condition.
D. A sputum culture can help identify respiratory infections but does not confirm cystic fibrosis.
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