The healthcare provider prescribes dobutamine 6 mcg/kg/min IV for a client who weighs 140 pounds. The IV bag contains dobutamine 250 mg in 250 mL dextrose 5% in water (DW). How many mL/hr should the nurse program the infusion pump to deliver? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["22.9"]
First, let’s convert the client’s weight from pounds to kilograms since the dosage is prescribed in mcg/kg/min. We know that 1 kg is approximately 2.2 lbs. So,
Weight in kg = 140 lbs/2.2 ≈ 63.64 kg
The prescribed dose is 6 mcg/kg/min. Therefore, the total dose for this client per minute would be:
Dose per minute=6 mcg/kg/min×63.64 kg = 381.84 mcg/min
We need to convert this to mcg/hr since we want the rate in mL/hr and our final concentration is in mcg/mL. There are 60 minutes in an hour, so:
Dose per hour = 381.84 mcg/min×60 = 22910.4 mcg/hr
The IV bag contains 250 mg of dobutamine in 250 mL of solution. This is equivalent to 250,000 mcg in 250 mL, or 1000 mcg/mL.
Finally, we can find the rate in mL/hr by dividing the dose per hour by the concentration:
Rate in mL/hr = 22910.4 mcg/hr / 1000 mcg/mL = 22.91 mL/hr
If rounding is required to the nearest tenth, the nurse should program the infusion pump to deliver 22.9 mL/hr.
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Related Questions
Correct Answer is ["0.25"]
Explanation
Here's how to calculate the volume the nurse should administer after reconstituting the medication:
Reconstitution:
The medication vial is labeled "0.3 mg with 1.2 mL of sterile water." This means adding 1.2 mL of diluent will result in a total volume of 1.2 mL solution.
Important Note:
The concentration of the medication after reconstitution is not explicitly provided on the label.
We cannot directly calculate the volume to administer based solely on the prescribed dose (0.0625 mg) and the unknown concentration.
Scenario:
In real-world practice, nurses rely on the medication information sheet or the manufacturer's label for dilution instructions and the final concentration after reconstitution.
This information is crucial for calculating the accurate volume to administer the prescribed dose.
Assuming the medication information sheet specifies:
After reconstitution with 1.2 mL diluent, the final concentration is 0.25 mg/mL.
Calculation (based on the assumed concentration):
Prescribed dose: 0.0625 mg
Volume to administer (mL) = Dose (mg) / Concentration (mg/mL)
Volume to administer (mL) = 0.0625 mg / 0.25 mg/mL
Volume to administer (mL) = 0.25 mL (round to nearest hundredth)
Therefore, based on the assumed concentration after reconstitution (0.25 mg/mL), the nurse should administer 0.25 mL to the client.
Correct Answer is ["8"]
Explanation
You can calculate the number of acyclovir tablets the nurse should administer every 24 hours using the following steps:
Daily Dosage: The medication is prescribed to be given every 6 hours, so to find the total daily dosage, we need to consider how many times it's administered in 24 hours:
Total Daily Doses = 24 hours / Dosage Frequency (every 6 hours)
Total Daily Doses = 24 hours / 6 hours/dose = 4 doses per day
Tablets per Dose: Since the prescribed dose is 800 mg and each tablet is 400 mg, we can find the number of tablets needed per dose:
Tablets per Dose = Prescribed Dose (mg) / Tablet Strength (mg/tablet)
Tablets per Dose = 800 mg / 400 mg/tablet = 2 tablets/dose
Total Tablets per Day: Now that we know the tablets needed per dose (2) and the total daily doses (4), we can find the total number of tablets for 24 hours:
Total Tablets per Day = Tablets per Dose x Total Daily Doses
Total Tablets per Day = 2 tablets/dose * 4 doses/day
Total Tablets per Day = 8 tablets
Therefore, the nurse should administer 8 tablets of acyclovir to the client every 24 hours.
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