A nurse is preparing to administer potassium 0.4 mEq/kg/hr to a newborn who weighs 6.7 lb. Available is potassium 10 mEq in 0.9% sodium chloride 100 mL. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["12.2"]
To calculate the IV pump setting, first convert the newborn's weight from pounds to kilograms, knowing that 1 pound is equivalent to 0.453592 kilograms. The newborn weighs 6.7 pounds, which is approximately 3.039 kg (6.7 lb * 0.453592 kg/lb). Next, calculate the total amount of potassium needed per hour by multiplying the newborn's weight in kilograms by the prescribed dose: 0.4 mEq/kg/hr * 3.039 kg = 1.2156 mEq/hr. Since the available potassium is 10 mEq in 100 mL, this means there is 0.1 mEq/mL. To find out how many mL/hr to administer, divide the total mEq needed per hour by the concentration: 1.2156 mEq/hr ÷ 0.1 mEq/mL = 12.156 mL/hr. Rounded to the nearest tenth, the IV pump should be set to deliver 12.2 mL/hr.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
To calculate the correct dosage, the nurse needs to divide the total units prescribed by the concentration of units per milliliter available. In this case, 1,200,000 units prescribed divided by 600,000 units per mL results in 2 mL.
Correct Answer is ["0.75"]
Explanation
To administer the correct dose of enoxaparin, which is 75 mg, when the available injection concentration is 100 mg/mL, the nurse needs to calculate the volume of enoxaparin to be administered. The calculation is based on the formula: Volume = Dose / Concentration. So, for a dose of 75 mg and a concentration of 100 mg/mL, the calculation would be 75 mg / 100 mg/mL = 0.75 mL.
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