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Calculate the flow rate in ml/hr and gtt/min using the formula method 500 mL D5W in 6hr. Drop factor: 15 gtt/mL.

84 mL/hr and 20 gtt/min

70mL/hr and 15 gtt/min

65 mL/hr and 10 gtt/min

83 mL/hr and 21 gtt/min

Answer and Explanation

The Correct Answer is D

Given:

Volume of fluid: 500 mL

Infusion time: 6 hours

Drop factor: 15 gtt/mL

Formula for mL/hr:

Flow rate (mL/hr) = Volume (mL) / Time (hr)

Step 1: Calculate the flow rate in mL/hr:

Flow rate (mL/hr) = 500 mL / 6 hr

Flow rate (mL/hr) = 83.33 mL/hr

Formula for gtt/min:

Flow rate (gtt/min) = (Volume (mL) / Time (hr)) x Drop factor (gtt/mL) / 60 min/hr

Step 2: Calculate the flow rate in gtt/min:

Flow rate (gtt/min) = (500 mL / 6 hr) x 15 gtt/mL / 60 min/hr

Flow rate (gtt/min) = 83.33 mL/hr x 15 gtt/mL / 60 min/hr

Flow rate (gtt/min) = 1250 gtt/hr / 60 min/hr

Flow rate (gtt/min) = 20.83 gtt/min

Step 3: Round to the nearest whole number:

Flow rate (mL/hr) ≈ 83 mL/hr

Flow rate (gtt/min) ≈ 21 gtt/min

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Correct Answer is B

Explanation

Given:

Volume of fluid: 100 mL

Infusion time: 1 hour (60 minutes)

Drop factor: 10 gtt/mL

Formula:

Flow rate (gtt/min) = (Volume (mL) / Time (min)) x Drop factor (gtt/mL)

Step 1: Calculate the infusion rate in mL/min:

Infusion rate (mL/min) = Volume (mL) / Time (min)

Infusion rate (mL/min) = 100 mL / 60 min

Infusion rate (mL/min) = 1.67 mL/min

Step 2: Calculate the flow rate in gtt/min:

Flow rate (gtt/min) = Infusion rate (mL/min) x Drop factor (gtt/mL)

Flow rate (gtt/min) = 1.67 mL/min x 10 gtt/mL

Flow rate (gtt/min) = 16.7 gtt/min

Step 3: Round to the nearest whole number:

Flow rate (gtt/min) ≈ 17 gtt/min

A. 0.5 mL B. 250 mL C. 1.7 mL D. 2 mL

Correct Answer is D

Explanation

Given:

Ordered dose of antibiotic: 250 mg

Vial contains: 250 mg of antibiotic

Reconstitution volume: 1.7 mL of sterile water

Final volume after reconstitution: 2 mL

Step 1: Determine the concentration of the reconstituted solution:

Concentration (mg/mL) = Total amount of drug (mg) / Total volume (mL)

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

Concentration (mg/mL) = 125 mg/mL

Step 2: Calculate the volume to be administered:

Volume (mL) = Ordered dose (mg) / Concentration (mg/mL)

Volume (mL) = 250 mg / 125 mg/mL

Volume (mL) = 2 mL

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Calculate the flow rate in ml/hr and gtt/min using the formula method 500 mL D5W in 6hr. Drop factor: 15 gtt/mL.

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Naxlex Comprehensive Predictor Exams

Order: Levaquin 500 mg IVPB in 100 mL 0.9% NS q12h over 1 hr. Drop factor: 10 gtt/mL Determine rate in gtt/min.

Correct Answer is B

Explanation

The doctor orders 250 mg of an antibiotic. The stock supply is a vial of 250 mg of the drug. Directions say to reconstitute with 1.7 mL of sterile water to yield 2 mL of the drug. How many milliliters will you give for the correct dose?

Correct Answer is D

Explanation

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