Order: Humulin regular IV to infuse at 12 units/hr. The IV solution is available as Humulin regular insulin IV 250 units in 250 mL of 0.9% NS. At what rate in mL/hr should the IV infuse? Round to the nearest tenths place where applicable and enter numeric value only (no commas or labels) ________ mL/hr

Step 1 is to calculate the concentration of the insulin solution in units/mL Units per mL = Total units ÷ Total mL 250 ÷ 250 = 1 unit/mL Step 2 is to calculate the flow rate in mL/hr mL/hr = Units per hour ÷ Units per mL 12 ÷ 1 = 12 mL/hr Step 3 is to round to the nearest tenth 12 = 12.0 Answer: 12.0