Medical Calculations Review for Nurses
This set of image-guided practice questions covers various IV calculations, including IV bolus administration, hourly infusion rates, drip rates, and infusion duration. Test your competency in calculating medication dosages and infusion rates to enhance your proficiency as a nurse.
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IV Calculations Please checker speaker notes for directions.
IV Bolus Order: lorazepam 1.5mg IV bolus now. Available: lorazepam 4mg/ml The nurse should administer _________ ml IV bolus now ?ml ?ml 1 ml 1 ml 4 mg 1.5 mg 1.5 mg = = 0.375 0.375 0.375 ml (0.38ml) round to the nearest tenth
IV Bolus Order: methylprednisolone 80 mg IV bolus now Available: methylprednisolone 20mg/ml The nurse should administer _____ ml IV bolus now ?ml ?ml 1 ml 1 ml 20 mg 80 mg 80 mg = = = 80 80 20 4 ml 4 ml 4 ml
Hourly Infusion Rate Order: 1000 ml D5W to infuse over 8 hours Hourly rate: ________________ ? ? Ml Ml Hr = = = 1000 ml 1000 ml 8 hr = = 125 ml 125 ml hr 125 ml/hr
Hourly Infusion Rate Order: 60 ml D5W to infuse over 15 minutes. Hourly rate: ___________ ? ? Ml Ml/ /Hr Hr 60 ml 60 ml 15 min 60 min 60 min 1 hr = 3600 = 3600 = 15 240 ml/ 240 ml/hr hr
Calculating Drip Rates Order: Normal saline at 75 ml/hr Drip Factor: 60 gtt/ml Drip Rate: ____________ gtt/min ? ?gtt gtt/mi n n /mi 60 60 gtt gtt 75 ml 75 ml 1 1 hr hr = = 4500 4500 = = 75 75 gtt gtt/min /min Ml Hr 60 min = 60 75 gtt/min
Calculating Drip Rates Order: 100 ml Normal saline to infuse over 45 min. Drip factor: 20 gtt/ml Drip rate _________ gtt/min ? ? Gtt Gtt/min /min 20 20 gtt gtt 100 ml 100 ml = = 2000 2000 = = 44.44 44.44 44 44 gtt gtt/min /min Ml 45 min = 45 44.44 (44 gtt/min) Round to the nearest tenth.
Duration of Infusion 750 ml bag of Normal Saline is to infuse at 100 ml/hr. How long will the bag last? ? ? Hrs Hrs 1 1 hr hr 100 ml 750 ml 750 ml = = 7.5 7.5 hrs hrs 7.5 hrs. ( 7 hrs, and 30 minutes)
Duration of Infusion 320 ml of packed RBC s is to infuse at 100 ml/hr. How long will the transfusion last? ? ? Hrs Hrs 1 1 hr hr 100 ml 320 ml 320 ml = = 3.2 hours 3.2 hours 3.2 hours ? Minutes = 0.2 * 60= 12 minutes 3 hours and 12 minutes is how long it will take for the RBC s to infuse.
