A nurse is preparing to administer lidocaine 7 mg/min via continuous IV infusion to a client who is pregnant and has a ventricular arrhythmia. Available is lidocaine 1 g in dextrose 5% in water 250 mL. The nurse should set the IV pump to deliver how many mL/hr? (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 ["105"]
To calculate the IV pump setting, we need to convert the dosage from mg/min to mg/hr, and then find out how many mL/hr this corresponds to, given the concentration of the solution. First, multiply the ordered dose by 60 minutes to convert to an hourly rate: 7 mg/min * 60 min/hr = 420 mg/hr. Next, since we have 1 g of lidocaine in 250 mL, we convert 1 g to mg, which is 1000 mg. Now, we have 1000 mg in 250 mL, so we need to find out how many mL are needed for 420 mg. Using a proportion, we have 1000 mg/250 mL = 420 mg/x mL. Solving for x gives us x = (420 mg * 250 mL) / 1000 mg, which equals 105 mL. Therefore, the nurse should set the IV pump to deliver 105 mL/hr.
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Related Questions
Correct Answer is ["25"]
Explanation
To calculate the IV pump setting, you need to determine how many milliliters per hour will provide 1 gram of magnesium sulfate. With 40 grams of magnesium sulfate in 1000 mL, you have a concentration of 0.04 grams per mL. To administer 1 gram per hour, divide the desired dose (1 gram) by the concentration (0.04 grams/mL), which equals 25 mL. Therefore, the nurse should set the IV pump to deliver 25 mL per hour.
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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