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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

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 D

Explanation

Convert ounces to millilitres (1 oz = 29.5735 mL):

6oz×29.5735mL/oz=177.441mL6

Calculate the frequency of doses per day:

The patient receives a dose every 4 hours, so in 24 hours, the number of doses is:

24hours/4hours/dose=6doses

Calculate the total volume for all doses:

177.441mL/dose×6doses=1064.646mL

Rounding to the nearest whole number=1080 mL

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