5. A physician orders D5W at 250mL over 6 hours and you are using a 20gtt/ mL IV administration set. What is the drop rate?
Answer : Drop rate = 14 drops per minute
Total volume to be infused = 250 ml
Time = 6 hours, (To convert time in minute multiply by 60, ie 6 × 60 = 360 minutes)
Drop factor = 20 gtt/ ml
To find drop rate use the following formula
Drop rate = × Drop factor
Drop rate = ×
Drop rate =
Drop rate = 13.888 drops/min (round the answer to nearest whole number as 14 gtt/ min)
Drop rate = 14 gtt/ min
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