A nurse is preparing to administer 0.45% NaCl 250 mL IV to infuse over 90 minutes. The drop factor of the manual IV tubing is 15 gtt/mL. What is the flow rate in gtt/min? (Round to the nearest whole number & fill in the blank with the numerical value only)

Total volume to be infused = 250 mL Total infusion time = 90 minutes Drop factor = 15 gtt/mL Calculate the flow rate in drops per minute (gtt/min): Flow rate (gtt/min) = (Total volume (mL) × Drop factor (gtt/mL)) / Total infusion time (minutes) = (250 mL × 15 gtt/mL) / 90 minutes = 3750 gtt / 90 minutes = 41.666... gtt/min Round to the nearest whole number: Rounded flow rate = 42 gtt/min