The healthcare provider prescribes an IV solution of regular insulin 100 units in 250 mL of 0.45% saline to infuse at 12 units/hour. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)

Given: Total insulin in solution: 100 units Volume of solution: 250 mL Infusion rate: 12 units/hour Step 1: Determine the concentration of insulin in the solution: Concentration (units/mL) = Total insulin (units) / Volume of solution (mL) Concentration (units/mL) = 100 units / 250 mL Concentration (units/mL) = 0.4 units/mL Step 2: Calculate the infusion rate in mL/hr: Infusion rate (mL/hr) = Infusion rate (units/hr) / Concentration (units/mL) Infusion rate (mL/hr) = 12 units/hr / 0.4 units/mL Infusion rate (mL/hr) = 30 mL/hr