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 Calculating Flow Rates for Intravenous Medications and Duration of Flow Exercises

Be sure to answer in numbers only (use decimals when necessary).

 1 . The prescriber ordered acyclovir sodium 5 mg/kg/hr IV. The directions are as follows: Add 500 mg (10 mL) to 100 mL 5% D/W. Calculate the flow rate in milliliters per hour for a patient who weighs 160 pounds. mL/h. 2 . A patient is to receive 600 units of heparin per hour. The drop factor is 60 microdrops per milliliter. The order states that 12,500 units of heparin are to be added to 250 milliliters of 5% D/W. How many microdrops per minute will you infuse? µgtt/min. 3 . A patient has an IV of 1000 milliliters of 5% D/W. The flow rate is 36 drops per minute. If the drop factor is 10 drops per milliliter, how many hours will it take this IV to finish? h (answer in decimals). 4 . An infusion of 1000 milliliters of lactated Ringer’s solution is infusing at a rate of 17 drops per minute. If the drop factor is 15 drops per milliliter, how long will the infusion take? h (answer in decimals). 5 . How many hours will an IV of 1000 milliliters of 5% D/W infuse if the order is for 125 milliliters per hour? h. 6 . The thrombolytic enzyme streptokinase (Streptase) has been ordered intravenously, 1,500,000 units over 60 minutes in 50 milliliters of 0.9% NS. What will the flow rate be in microdrops per minute? µgtt/min. 7 . The prescriber has ordered 250 milliliters of 5% D/W with 250 milligrams of esmolol hydrochloride (Brevibloc) at a rate of 10 micrograms per kilogram per minute IV. What will the flow rate be in milliliters per hour if the patient weighs 75 kilograms? mL/h. 8 . If an IV is infusing at a rate of 80 microdrops per minute, how many milliliters per hour will your patient receive? mL/h. 9 . The label reads 20 mg/mL. The medication order reads: Solu-Medrol 1 g in 250 mL 5% D/W, 50 mg/hr. How many milliliters per hour will your patient receive IV? mL/h. 10 . The prescriber has ordered 500 milliliters of 5% D/W with 500 milligrams of lidocaine IV and your patient, who weighs 80 kilograms, must receive 20 micrograms per kilogram per minute. What will the flow rate be in milliliters per hour? mL/h. 11 . The prescriber ordered 250 mL 5% D/W with 12,500 u heparin. This is to be infused at a rate of 900 units per hour. Calculate the flow rate in milliliters per hour. mL/h. 12 . Reconstitute with 11.5 mL and add 5,000,000 units of penicillin to 50 milliliters of 5% D/W; infuse in 30 minutes. The drop factor is 15 drops per milliliter. Calculate the flow rate. gtt/min. 13 . You have an order for pentamidine isethionate (Pentam 300), 300 milligrams in 250 milliliters of 5% D/W at a rate of 2.5 milligrams per minute IV. What is the flow rate in drops per minute if the drop factor is 15 drops per milliliter? gtt/min. 14 . An infusion of 500 milliliters of lactated Ringer’s solution was started at 1 p.m. The flow rate is 25 drops per minute, and the drop factor is 15 drops per milliliter. How long will it take for this IV to finish? h. 15 . A loading dose of the bronchodilator aminophylline (Aminophyllin) is ordered at 0.18 milligram per kilogram per minute IV. The patient weighs 70 kilograms. What will the flow rate be if 500 milligrams of aminophylline is added to 250 milliliters of 5% D/W? The drop factor is 10 drops per milliliter. gtt/min.

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