How many total drops would be delivered during an 8-hour infusion of 400 mL with a drop factor of 20 gtt/mL?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

How many total drops would be delivered during an 8-hour infusion of 400 mL with a drop factor of 20 gtt/mL?

Explanation:
The main idea here is that the drop factor tells you how many drops constitute one milliliter. To get the total drops for a given volume, multiply the volume by the drop factor: 400 mL × 20 gtt/mL = 8000 drops. The 8-hour duration isn’t needed to find the total number of drops, but it can be used to check the rate: the infusion would be 50 mL/hour, which equals 50 × 20 = 1000 drops/hour, or about 16.7 drops per minute. Over 8 hours, that also totals about 8000 drops.

The main idea here is that the drop factor tells you how many drops constitute one milliliter. To get the total drops for a given volume, multiply the volume by the drop factor: 400 mL × 20 gtt/mL = 8000 drops. The 8-hour duration isn’t needed to find the total number of drops, but it can be used to check the rate: the infusion would be 50 mL/hour, which equals 50 × 20 = 1000 drops/hour, or about 16.7 drops per minute. Over 8 hours, that also totals about 8000 drops.

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