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 250 ml D5W for intravenous infusion? |
| 3 | Calculate the infusion time for volume of 1650 ml infusing at a rate of 30 ml/hr. |
| 4 | Calculate the infusion time in minutes for a volume of 220 mL infusing at 22 gtt/min with an infusion set of 15 gtt/mL. |
| 5 | A volume of 750 mL is to infuse at 150 mL/hr using an IV set with drop factor of 10 gtt/mL. The infusion was started at 21:35. Calculate : a) gtt/min; b ) infusion time; c) completion time |
| 6 | A solution containing 24ml of antibiotic is added to 580ml of 5 % dextrose injection. The infusion is to be administered over 2 hours. If the administration set delivers 20 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 322ml/hour. The IV tubing has a calibration of 60 gtt/ml. What is the drip rate? |
| 8 | A physician ordered: Penicillin G Potassium 9000000 units IV in 800ml D5W to infuse over 6 hours. The penicillin vial states: Penicillin G Potassium 1000000 units and to reconstitute dilute with 3.8 mL of D5W to yield 250000 units per mL. Drop Factor for the administration set is 15gtts/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 160 mg of drug in 500 mL of a large volume parenteral fluid. a) What would be the correct flow rate in mL/min to deliver 2 mg per hour? b) If the IV administration set is calibrated to deliver 15 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 20000 units of heparin in 500 ml D5W. What is the flow rate in ml/hr? |
| 11 | Heparin comes premixed in a bag which contains 20000units in 500ml. If a standard infusion rate for a patient is 15 units/kg/hr, how many milliliters/hour will a 262 pound male receive? |
| 12 | A drug comes at a concentration of 1.90 mg/ml. If a patient is doses at 1 mcg/kg/min, calculate the required rate of infusion for this solution in ml/hr for a patient that weighs 92 kg. |
| 13 | An order reads furosemide (Lasix) 20 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 30 mg IV push stat. to a patient having a seizure. How much should you draw into the syringe? |
| 15 | A pediatric patient received 95 ml of an infusion at 45 drops/minute with administration set that delivered 60 drops/ml. Calculate the duration of the infusion in hours. |
| 16 | A vial contains 1 g of powdered drug. The label states that when 3.4 ml of diluent are added, the solution which results contains a drug concentration of 250 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 150 mg/ml? |
| 17 | A physician has written an order to begin dopamine at 2 mcg/kg/min for a 235 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: 12.50 grams
The Answer to question 3 is: 55 hours and 0 minutes
The Answer to question 4 is: 150 minutes
The Answer to question 5 is: a)25 drops/min; b)5.0 hours; c)2:35
The Answer to question 6 is: 101 drops/min
The Answer to question 7 is: 322 gtt/min
The Answer to question 8 is: a)36 ml b)35 gtt/min c)0.20 ml
The Answer to question 9 is: 0.10 ml/min; 2 gtt/min
The Answer to question 10 is: 37.5 ml/hr
The Answer to question 11 is: 44.7 ml/min
The Answer to question 12 is: 968.42 ml/hr
The Answer to question 13 is: 2 ml
The Answer to question 14 is: 6.00 ml
The Answer to question 15 is: 2.11 hrs
The Answer to question 16 is: a) 0.60 ml; b) 6.07 ml
The Answer to question 17 is: 16.0 ml/hr