Practice problems
| # | Question |
|---|---|
| 1 | How many g of sodium chloride are required to prepare a bag of 500 ml NS for intravenous infusion? |
| 2 | How many g of dextrose are required to prepare a bag of 750 ml D5W for intravenous infusion? |
| 3 | Calculate the infusion time for volume of 1700 ml infusing at a rate of 30 ml/hr. |
| 4 | Calculate the infusion time in minutes for a volume of 500 mL infusing at 50 gtt/min with an infusion set of 20 gtt/mL. |
| 5 | A volume of 500 mL is to infuse at 75 mL/hr using an IV set with drop factor of 20 gtt/mL. The infusion was started at 21:35. Calculate : a) gtt/min; b ) infusion time; c) completion time |
| 6 | A solution containing 46ml of antibiotic is added to 180ml of 5 % dextrose injection. The infusion is to be administered over 2 hours. If the administration set delivers 15 drops/ml, at what rate, in drops per minute, should the flow be adjusted to administer the infusion over the designated time interval? |
| 7 | A patient, admitted with a head injury, has an order to start 1000cc of D5NS at 358ml/hour. The IV tubing has a calibration of 60 gtt/ml. What is the drip rate? |
| 8 | A physician ordered: Penicillin G Potassium 4000000 units IV in 800ml D5W to infuse over 8 hours. The penicillin vial states: Penicillin G Potassium 20000000 units and to reconstitute dilute with 72 mL of D5W to yield 250000 units per mL. Drop Factor for the administration set is 60gtts/ml. a) How much penicillin should be added to the 800 mL of D5W? b) What should be the drip rate? c) What is the volume occupied by the powder? |
| 9 | A patient is to receive 40 mg of drug in 250 mL of a large volume parenteral fluid. a) What would be the correct flow rate in mL/min to deliver 9 mg per hour? b) If the IV administration set is calibrated to deliver 20 drops/mL what would be the correct drip rate (to the nearest whole number)? |
| 10 | 1500 units/hr of heparin have been ordered. The pharmacy has a bag of IV fluid with 25000 units of heparin in 500 ml D5W. What is the flow rate in ml/hr? |
| 11 | Heparin comes premixed in a bag which contains 25000units in 500ml. If a standard infusion rate for a patient is 12 units/kg/hr, how many milliliters/hour will a 236 pound male receive? |
| 12 | A drug comes at a concentration of 0.60 mg/ml. If a patient is doses at 13 mcg/kg/min, calculate the required rate of infusion for this solution in ml/hr for a patient that weighs 77 kg. |
| 13 | An order reads furosemide (Lasix) 25 mg IV push. You have on hand 10 mg/ 1 ml . How much should you draw into the syringe? |
| 14 | You have on hand diazepam (Valium) 5 mg/mL. You need to administer 7 mg IV push stat. to a patient having a seizure. How much should you draw into the syringe? |
| 15 | A pediatric patient received 85 ml of an infusion at 34 drops/minute with administration set that delivered 60 drops/ml. Calculate the duration of the infusion in hours. |
| 16 | A vial contains 5 g of powdered drug. The label states that when 10 ml of diluent are added, the solution which results contains a drug concentration of 480 mg/ml. a) What is the volume of injection occupied by the powder? b) How many milliliters of diluent should be added to the vial for a medication order that calls for a drug concentration of 300 mg/ml? |
| 17 | A physician has written an order to begin dopamine at 6 mcg/kg/min for a 264 pound patient.A standard dopamine drip is 400 mg in 500 ml D5W. Please calculate an infusion rate in ml/hr for this patient. |
Answers
The Answer to question 1 is: 4.50 grams
The Answer to question 2 is: 37.50 grams
The Answer to question 3 is: 56 hours and 40 minutes
The Answer to question 4 is: 200 minutes
The Answer to question 5 is: a)25 drops/min; b)6.7 hours; c)4:17
The Answer to question 6 is: 28 drops/min
The Answer to question 7 is: 358 gtt/min
The Answer to question 8 is: a)16 ml b)102 gtt/min c)8.00 ml
The Answer to question 9 is: 0.94 ml/min; 19 gtt/min
The Answer to question 10 is: 30 ml/hr
The Answer to question 11 is: 25.7 ml/min
The Answer to question 12 is: 41708.33 ml/hr
The Answer to question 13 is: 2.5 ml
The Answer to question 14 is: 1.40 ml
The Answer to question 15 is: 2.50 hrs
The Answer to question 16 is: a) 0.42 ml; b) 16.25 ml
The Answer to question 17 is: 54.0 ml/hr