A client receives a prescription for heparin 320 units/hour. The available solution is labeled Heparin Sodium 20,000 Units in 5% Dextrose Injection 500 mL. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)

Calculation: Determine the concentration of heparin in the IV solution in units/mL: Heparin concentration (units/mL) = Total heparin units / Total volume of solution (mL) = 20,000 units / 500 mL = 40 units/mL Identify the prescribed infusion rate in units per hour: = 320 units/hour Calculate the infusion rate in mL per hour: Infusion rate (mL/hour) = Prescribed rate (units/hour) / Heparin concentration (units/mL) = 320 units/hour / 40 units/mL = 8 mL/hour