ATI LPN Pharmacology and Dosage Calculation Proctored Exam
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
Explanation & Rationale
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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