Rationale: Determine the total volume to be infused. The nurse is preparing to administer 150 mL of dextrose 5% in water (DW). Calculate the infusion rate in mL/min. The infusion time is 3 hours, which is equivalent to 3 x 60 = 180 minutes. Infusion rate = Total volume / Infusion time = 150 mL / 180 min = 0.83 mL/min Apply the drop factor to find the drip rate in gtt/min. Drop factor of the tubing is 10 gtt/mL. Drip rate = Infusion rate (mL/min) x Drop factor (gtt/mL) = 0.83 mL/min x 10 gtt/mL = 8.3 gtt/min Round the drip rate to the nearest whole number. Drip rate = 8 gtt/min