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Calculate the rate in gtt/min for the following medications being administered IVPB.

Order: Doxycycline 25 mg IVPB D5W 50 mL over 1 hr. Drop factor: 15 gtt/mL

A.

6 gtt/min

B.

20 gtt/min

C.

25 gtt/min

D.

13 gtt/min

Answer and Explanation

The Correct Answer is D

Given:

Volume of fluid: 50 mL

Infusion time: 1 hour (60 minutes)

Drop factor: 15 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) = 50 mL / 60 min

Infusion rate (mL/min) = 0.83 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) = 0.83 mL/min x 15 gtt/mL

Flow rate (gtt/min) = 12.5 gtt/min

 

Step 3: Round to the nearest whole number:

Flow rate (gtt/min) ≈ 13 gtt/min


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Related Questions

Correct Answer is D

Explanation

Given:
Volume of fluid: 50 mL (DSW) + 10 mL (for reconstitution) = 60 mL
Infusion time: 45 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) = 60 mL / 45 min
Infusion rate (mL/min) = 1.33 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) = 1.33 mL/min x 10 gtt/mL
Flow rate (gtt/min) = 13.3 gtt/min

Step 3: Round to the nearest whole number:
Flow rate (gtt/min) ≈ 13 gtt/min

Correct Answer is D

Explanation

Given:
Ordered dose of Acyclovir: 12 mg/kg
Patient weight: 115 lbs
Concentration of Acyclovir: 100 mg/2 mL

Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 115 lbs * 0.453592 kg/lb = 52.16308 kg

Step 2: Calculate the total dose of Acyclovir:
Total dose (mg) = Ordered dose (mg/kg) x Patient weight (kg)
Total dose (mg) = 12 mg/kg x 52.16308 kg = 625.95696 mg

Step 3: Calculate the volume to be administered:
Volume (mL) = Total dose (mg) / Concentration (mg/mL)
Volume (mL) = 625.95696 mg / 100 mg/2 mL
Volume (mL) = 625.95696 mg x (2 mL / 100 mg)
Volume (mL) = 12.5191392 mL

Step 4: Round to the nearest tenth:
Volume (mL) ≈ 12.5 mL/dose

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