A client is to receive 10 mcg/min nitroglycerine IV. The concentration of solution is 50 mg in 250 mL D5W. At what rate (mL/hr) will the nurse set the pump? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Calculation: Calculate the concentration of the solution in micrograms (mcg) per milliliter (mL). Convert the total milligrams (mg) of nitroglycerine to micrograms (mcg): 50 mg x 1,000 mcg/mg = 50,000 mcg Concentration = Total mcg / Total mL = 50,000 mcg / 250 mL = 200 mcg/mL. Determine the required flow rate in mL per minute (mL/min). Flow rate (mL/min) = Ordered dose (mcg/min) / Concentration (mcg/mL) = 10 mcg/min / 200 mcg/mL = 0.05 mL/min. Convert the flow rate from mL per minute to mL per hour (mL/hr). Flow rate (mL/hr) = Flow rate (mL/min) x 60 min/hr = 0.05 mL/min x 60 min/hr = 3 mL/hr.