A nurse is preparing to administer ondansetron 4 mg IM to a client who reports nausea following a cesarean birth. Available is ondansetron injection 2 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["2"]
To administer the correct dose of ondansetron, which is 4 mg intramuscularly, the nurse needs to calculate the volume of ondansetron injection required based on the concentration provided. The available ondansetron injection has a concentration of 2 mg/mL. To find the volume needed to deliver 4 mg, the nurse should divide the ordered dose by the concentration of the drug: 4 mg divided by 2 mg/mL equals 2 mL.
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Related Questions
Correct Answer is ["63"]
Explanation
To calculate the infusion rate for the IV pump, the total volume of the IV fluid (250 mL) should be divided by the time over which the infusion is to take place (4 hours). This calculation results in an infusion rate of 62.5 mL/hr. Since the infusion pump cannot be set to a decimal, the rate is rounded to the nearest whole number, which is 63 mL/hr.
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.
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