An infusion set delivers 15 drops per ml. How many drops per minute are needed to give 100 ml in 30 minutes?
Answer and explanation
Correct answer: B. 50 drops/min
- Step 1: Drops per minute = volume x drops per ml / minutes. Step 2. 100 x 15 / 30 = 50. Answer: 50 drops/min. Why not the others: 200 drops/min: the drop factor was used as a divisor. 3.3 drops/min: this is ml per minute, the drop factor was left out. 100 drops/min: the result was doubled.
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