GTT Dosage Calculations Questions And Answers
Calculate the IV flow rate in gtt/min for the following administrations, unless another unit of measure is stated. 1000 mL D5LR to infuse in 8 hr. Drop factor: 20 gtt/mL. How many gtt/min? correct answer: Answer: 42 gtt/min gtt/min= 20gtt/mL x 1000mL/8hr x 1hr/60min= 20gtt x 1000mL x 1hr= 20000 1mL x 8hr x 60min= 480 20000/480= 41.67 (round to whole #) 42 gtt/min 1000 mL LR to infuse in 10 hr. Drop factor: 20 gtt/mL correct answer: Answer 33 gtt/min gtt/min= 20 gtt/mL x 1000mL/10hr x 1hr/60min= 20gtt x 1000mL x 1 hr= 20000 1mL x 10hr x 60 min= 600 20000/600= 33.33 (round to whole #) 33 gtt/min A unit of packed cells (250mL) to infuse in 4 hr. Drop factor: 20gtt/min correct answer: Answer: 21 gtt/min gtt/min= 20gtt/mL x 250mL/4hr x 1hr/60min= 20gtt x 250mL x 1 hr= 5000 1mL x 4 hr x 60 min= 240 5000/240= 20.833 (round to whole #) 21 gtt/min 2L D5LR @ 150 mL/hr. Drop factor: 15gtt/mL correct answer: Answer: 38 gtt/min gtt/min= 15gtt/mL x 150ml/hr x 1hr/60min= 15gtt x 150mL x 1 hr= 2250
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