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A Nitroglycerin drip is infusing at 3 mL/hr. the available solution is 50 mg of Nitroglycerin in 250 mL D5W. Calculate the following: mcg/hr

A.

600 mcg/hr

B.

500 mcg/hr

C.

700 mcg/hr

D.

550 mcg/hr

Answer and Explanation

The Correct Answer is A

Given:

Infusion rate: 3 mL/hr

Concentration of Nitroglycerin: 50 mg in 250 mL D5W (200 mcg/mL)

 

Step 1: Calculate the dose in mg/hr:

Dose (mg/hr) = Infusion rate (mL/hr) x Concentration (mg/mL)

Dose (mg/hr) = 3 mL/hr x 200 mcg/mL

Dose (mg/hr) = 600 mcg/hr


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Related Questions

Correct Answer is D

Explanation

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

Correct Answer is C

Explanation

To calculate:

1. Convert units:

1 oz = 30 mL

3 oz formula = 3 oz x 30 mL/oz = 90 mL

2 oz juice = 2 oz x 30 mL/oz = 60 mL

2. Calculate total oral intake:

Total oral intake = 10 mL (medication) + 90 mL (formula) + 60 mL (juice) = 160 mL

3. Calculate IV fluid intake:

IV fluid intake = 20 mL/hr x 8 hr = 160 mL

4. Calculate total fluid intake:

Total fluid intake = 160 mL (oral) + 160 mL (IV) = 320 mL

Answer: 320 mL

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