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Order: dobutamine 5 mcg/kg/min

Patient's weight: 152 lb

Available: dobutamine 500 mg in 250 mL D5W

What is the flow rate in ml/hr? (Round to the nearest tenths)

A.

9 mL/hr

B.

103.5 mL/hr

C.

11 mu/hr

D.

10.4 mL/hr

Answer and Explanation

The Correct Answer is D

1. Convert patient weight from pounds to kilograms:

Patient weight (kg) = 152 lb x 0.453592 kg/lb = 68.94 kg

2. Calculate the desired dose in mcg/min:

Desired dose (mcg/min) = 5 mcg/kg/min x 68.94 kg = 344.7 mcg/min

3. Convert mcg/min to mg/min:

Desired dose (mg/min) = 344.7 mcg/min / 1000 mcg/mg = 0.3447 mg/min

4. Calculate the concentration of dobutamine in the solution:

Concentration (mg/mL) = 500 mg / 250 mL = 2 mg/mL

5. Calculate the flow rate in mL/min:

Flow rate (mL/min) = Desired dose (mg/min) / Concentration (mg/mL)

Flow rate (mL/min) = 0.3447 mg/min / 2 mg/mL = 0.17235 mL/min

6. Calculate the flow rate in mL/hr:

Flow rate (mL/hr) = 0.17235 mL/min x 60 min/hr = 10.341 mL/hr

7. Round to the nearest tenth:

Flow rate (mL/hr) = 10.3 mL/hr

Therefore, the correct answer is 10.4 mL/hr


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Related Questions

Correct Answer is D

Explanation

Convert the dosage to mcg per hour:

55 mcg/min × 60 min = 3300 mcg/hr

Determine the concentration of nitroglycerin available:

The concentration is 25 mg per 250 mL, which converts to 100 mcg/mL.

Calculate the flow rate in mL per hour using the dosage and concentration:

Flowrate(mL/hr)=(Dose(mcg/hr)/Concentration(mcg/mL))

(3300mcg/hr100mcg/mL)=33mL/hr

Correct Answer is C

Explanation

Let's calculate the dosage using the provided information.

Information from the label:

Bumetanide concentration: 0.25 mg/mL

Available volume: 10 mL vial

Order: Bumex (bumetanide) 1 mg IV daily

Calculation:

Determine the desired dose: 1 mg

Use the formula:

Desired dose (mg) / Available concentration (mg/mL) = Volume to administer (mL)

Substitute the values:

1 mg / 0.25 mg/mL = Volume to administer (mL)

Calculate:

Volume to administer = 4 mL

Therefore, the correct answer is C. 4 mL

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