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.)

Answer and Explanation

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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Free Nursing Study Resources

Correct Answer is ["1"]

Explanation

Here's the breakdown:

Prescribed dose: 2 mg midazolam (given)

Vial concentration: 4 mg/2 mL (label)

We need to find the volume containing the 2 mg dose considering the concentration.

Calculation:

Volume (mL) = Dose (mg) / (Concentration (mg/mL) / 2)

We divide the concentration by 2 because we need the volume that delivers 2 mg (half the concentration).

Volume (mL) = 2 mg / (4 mg/mL / 2)

Volume (mL) = 2 mg / 2 mg/mL

Volume (mL) = 1 mL

Therefore, the nurse should administer 1 mL of midazolam to deliver the prescribed dose of 2 mg.

Correct Answer is ["100"]

Explanation

The nurse should set the infusion pump to deliver the entire 150 mL over the course of 90 minutes.

First, convert the time from minutes to hours because the rate is required in mL/hr.

90 minutes is 1.5 hours (since 1 hour = 60 minutes).

Therefore, the IV pump should be set to deliver:

Rate(mL/hr)=Time(hr)Totalvolume(mL)=1.5hr150mL

After performing the calculation, we find that the rate equals 100 mL/hr.

So, the nurse should set the infusion pump to deliver 100 mL/hr. This is rounded to the nearest whole number as per the instructions.

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Naxlex Comprehensive Predictor Exams

A client receives a prescription for a single dose of midazolam 2 mg IV to be administer before a scheduled procedure. The vial is label, *4 mg/2 mL." How many mL should the nurse administer? (Enter numerical value only.)

Correct Answer is ["1"]

Explanation

The healthcare provider prescribes ganciclovir 375 mg intravenously (IV) every 12 hours to infuse over 90 minutes. The pharmacy delivers ganciclovir 375 mg in a 150 mL IV bag. How many mL/hour should the nurse program the infusion pump? (Enter a whole number only.)

Correct Answer is ["100"]

Explanation

The nurse is preparing a dose of ketorolac 12 mg IV using a 1 mL vial containing 30 mg/mL. How many mL should the nurse administer? (Enter numerical value only.)

A client with deep vein thrombosis (DVT) is receiving a continuous IV infusion of heparin sodium 20,000 units in 5% dextrose injection 500 mL at the rate of 25 mL/hour. How many units of heparin should the client receive in 12 hours? (Enter numeric value only.)

A client who weighs 154 pounds receives a prescription for levothyroxine 1.6 mcg/kg by mouth (PO) daily. The medication is available in 112 mcg scored tablets. How many tablets should the nurse administer? (Enter numerical value only.)

The healthcare provider prescribes a liter of normal saline IV to be infused over 9 hours for a client who is NPO. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number).

The healthcare provider prescribes 0.075 mg of levothyroxine PO daily. The medication is labeled, "50 mcg tablets." How many tablets should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)