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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Related Questions
Correct Answer is ["133"]
Explanation
To calculate the infusion pump rate for a maintenance dose of magnesium sulfate, you need to determine how many milliliters per hour (mL/hr) will provide 4 grams (g) of magnesium sulfate per hour. Given that the pharmacy provides a 1-liter bag with 30 g of magnesium sulfate, this means there are 30,000 milligrams (mg) in 1,000 milliliters (mL) of solution. Since 1 g equals 1,000 mg, you need to administer 4,000 mg of magnesium sulfate per hour. To find the rate, divide the total amount of magnesium sulfate in the bag by the desired hourly dose: 30,000 mg divided by 4,000 mg per hour equals 7.5 hours of infusion time. Therefore, to administer the maintenance dose over one hour, you would set the infusion pump to 1,000 mL divided by 7.5 hours, which equals approximately 133.33 mL/hr = 133 mL/hr rounded off to the nearest whole number.
Correct Answer is ["4.8"]
Explanation
To calculate the IV pump setting for dobutamine administration, first determine the total mcg per minute for the newborn, which is 10 mcg/kg/min multiplied by the newborn's weight. For a 4 kg newborn, this would be 40 mcg/min. Next, convert the available dobutamine concentration to mcg/mL by dividing the total mg available by the volume in mL, resulting in 250 mg / 500 mL = 0.5 mg/mL, which is equivalent to 500 mcg/mL. Now, divide the newborn's required mcg/min by the concentration in mcg/mL to find the mL/min, which is 40 mcg/min / 500 mcg/mL = 0.08 mL/min. Finally, convert this to mL/hr by multiplying by 60, resulting in 4.8 mL/hr. After rounding to the nearest tenth, the IV pump should be set to deliver 4.8 mL/hr.
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