Practice problems
| # | Question |
|---|---|
| 1 | How many g of sodium chloride are required to prepare a bag of 50 ml NS for intravenous infusion? |
| 2 | How many g of dextrose are required to prepare a bag of 50 ml D5W for intravenous infusion? |
| 3 | Calculate the infusion time for volume of 200 ml infusing at a rate of 75 ml/hr. |
| 4 | Calculate the infusion time in minutes for a volume of 360 mL infusing at 26 gtt/min with an infusion set of 15 gtt/mL. |
| 5 | A volume of 2250 mL is to infuse at 175 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 56ml of antibiotic is added to 500ml 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 92ml/hour. The IV tubing has a calibration of 60 gtt/ml. What is the drip rate? |
| 8 | A physician ordered: Penicillin G Potassium 16000000 units IV in 300ml D5W to infuse over 24 hours. The penicillin vial states: Penicillin G Potassium 5000000 units and to reconstitute dilute with 4.7 mL of D5W to yield 750000 units per mL. Drop Factor for the administration set is 20gtts/ml. a) How much penicillin should be added to the 300 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 190 mg of drug in 1000 mL of a large volume parenteral fluid. a) What would be the correct flow rate in mL/min to deliver 1 mg per hour? b) If the IV administration set is calibrated to deliver 10 drops/mL what would be the correct drip rate (to the nearest whole number)? |
| 10 | 1600 units/hr of heparin have been ordered. The pharmacy has a bag of IV fluid with 12500 units of heparin in 250 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 15 units/kg/hr, how many milliliters/hour will a 242 pound male receive? |
| 12 | A drug comes at a concentration of 1.20 mg/ml. If a patient is doses at 15 mcg/kg/min, calculate the required rate of infusion for this solution in ml/hr for a patient that weighs 49 kg. |
| 13 | An order reads furosemide (Lasix) 35 mg IV push. You have on hand 20 mg/ 2 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 50 drops/minute with administration set that delivered 60 drops/ml. Calculate the duration of the infusion in hours. |
| 16 | A vial contains 2 g of powdered drug. The label states that when 6 ml of diluent are added, the solution which results contains a drug concentration of 300 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 250 mg/ml? |
| 17 | A physician has written an order to begin dopamine at 2.5 mcg/kg/min for a 131 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: 0.45 grams
The Answer to question 2 is: 2.50 grams
The Answer to question 3 is: 2 hours and 40 minutes
The Answer to question 4 is: 208 minutes
The Answer to question 5 is: a)58 drops/min; b)12.9 hours; c)10:29
The Answer to question 6 is: 70 drops/min
The Answer to question 7 is: 92 gtt/min
The Answer to question 8 is: a)21 ml b)4 gtt/min c)1.97 ml
The Answer to question 9 is: 0.09 ml/min; 1 gtt/min
The Answer to question 10 is: 32 ml/hr
The Answer to question 11 is: 33.0 ml/min
The Answer to question 12 is: 0.61 ml/hr
The Answer to question 13 is: 3.5 ml
The Answer to question 14 is: 1.40 ml
The Answer to question 15 is: 1.70 hrs
The Answer to question 16 is: a) 0.67 ml; b) 7.33 ml
The Answer to question 17 is: 11.2 ml/hr