High School

900 mL of RL is infusing at a rate of 80 gtt/min (80 macrodrops/min). The drop factor is 15 gtt/mL. How long will it take for the IV to infuse? (Express time in hours and minutes.)

Answer :

To determine the time it would take for 900 mL of RL to infuse at 80 gtt/min with a drop factor of 15 gtt/mL, the volume and drop factor are multiplied, then divided by the rate. This calculation results in an infusion time of approximately 2 hours and 9 minutes.

To calculate the infusion time, we need to determine the total volume to be infused and the rate at which the infusion pump is set. Given that the volume is 900 mL and the drop factor is 15 gtt/mL, we can use the following formula:

Time (minutes) = (Volume (mL) imes Drop factor (gtt/mL)) / Rate (gtt/min)

Using the provided information:

Time (minutes) = (900 mL imes 15 gtt/mL) / 80 gtt/min
Time (minutes) = 13500 gtt / 80 gtt/min
Time (minutes) = 168.75 minutes

To express the time in hours and minutes, we convert 168.75 minutes:

Hours: 168.75 minutes \/ 60 minutes/hour = 2 hours

Minutes: 168.75 minutes % 60 = 8.75 minutes, which can be rounded to 9 minutes.

Therefore, the IV will take approximately 2 hours and 9 minutes to infuse.