A nurse is preparing to administer lactated Ringer's 75 mL/hr by continuous IV infusion. The drop factor on the manual IV tubing is 20 gtt/mL. The nurse should set the IV flow rate to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Infusion rate in mL/hr = 75 mL/hr. Drop factor of the IV tubing = 20 gtt/mL. Convert the infusion rate from mL/hr to mL/min. Infusion rate in mL/min = 75 mL/hr / 60 min/hr = 1.25 mL/min. Calculate the IV flow rate in gtt/min. IV flow rate (gtt/min) = Infusion rate (mL/min) × Drop factor (gtt/mL) = 1.25 mL/min × 20 gtt/mL = 25 gtt/min.