A nurse is preparing to administer regular insulin 5 units/hr by continuous IV infusion. Available is regular insulin 100 units in 0.9% sodium chloride 1,000 mL. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Calculation: Determine the total units of insulin available: Available insulin: 100 units Determine the total volume of the solution: Total volume: 1000 mL Calculate the concentration of the insulin solution in units per milliliter: Formula: Concentration (units/mL) = Total units / Total mL = 100 units / 1000 mL = 0.1 units/mL Determine the desired dose of insulin per hour: Ordered dose: 5 units/hr Calculate the IV pump flow rate in mL/hr: Formula: Flow rate (mL/hr) = Desired dose per hour (units/hr) / Concentration (units/mL) = 5 units/hr / 0.1 units/mL = 50 mL/hr