Mock clinical calculations exam 1. Pethidine 60mg is ordered/ Stock ampules contain 100mg in 2ml. calculate the volume to be drawn up for injection? 60mg/ 100mg x 2ml= 1.2ml 2. Gentamycin 360 mg is prescribed. Gentamycin is available as 80mg/2ml. How many mls will you draw up? 360mg/ 80mg x2ml= 9ml 3. A child weighing 18kg is prescribed penicillin. The recommended dose is 50mg/kg/day. The child will have 4 doses in one day. What is the child's total daily dose? 18kg x 50mg/kg/day =900mg/ day What is the amount to be given 6 hourly? 900mg/ 4doses= 225mg/ dose 4. The patient is charted 15mg/kg/day. The patient weighs 75kg. a) How much is the total dose per 24 hours? 75kg x 15mg/kg/day= 1125mg/ day b) How many mg will the patient receive every 8 hours? 1125mg/ 3doses= 375mg/ dose 5. How many ml/hr would a patient receive if they were to have 1500ml of fluid infused over 6 hours? 1500mg/ 6hours= 250ml/ hr 6. Your patient is prescribed a 1500ml infusion of Sodium Chloride 0.9% with 40 mmols of Potassium to be given over 12 hours. Using a standard giving set, calculate the drops per minutes AND the ml/hr he will receive? 1500ml/ 12 hours =125ml/ hr 125ml/hr / 60mg=2.08ml/ min 2.08ml/min x 20drops/ml= 42dpm (41.66 rounded up)
7. Your patient is prescribed a 2000ml infusion of Sodium Chloride 0.9% 8 hours. Using a standard giving set, calculate the drops per minutes AND the ml/hr he will receive? 2000ml / 8hrs= 250ml/hr 250ml/hr / 60 mins= 4.2ml/min 4.2ml/min x 20drop/ml= 83dpm 8. Your patient is prescribed a 1000ml of fluid to be given over 3 hours. Using a standard giving set, calculate the drops per minutes AND the ml/hr he will receive? 1000ml/ 3hrs= 333ml/hr 333ml/hr / 60min= 5.55ml/ min 5.55ml/min x 20drops/ml= 111dpm 9. 20,000 units of Heparin is added to 500ml of 0.9% Saline. Dose prescribed is 100 units per hour. Calculate the rate of infusion in ml/hr 20000units / 500ml = 40 units/ ml 100units/hr / 40units/ml = 2.5ml/hr 10. Your client weighs 60kg. The doctor has ordered a single dose of 2 mg/kg of Medication G. This medication is provided as 60mg in 2 ml. Calculate the volume to be administered. 60kg x 2mg/kg= 120mg 60mg / 2ml= 30mg/ml 120mg / 30mg/ml= 4ml 11. Miss K weighs 60kg. She is to have 6mg/kg of Medication L. The stock available is 120mg/5ml. Calculate the volume to be administered. 60kg x 6mg/kg= 360mg 120ml/ 5ml= 24mg/ml 360mg / 24mg/ml= 15ml 12. The PCA machine holds 50ml, containing 500mg of Medication P. The doctor has ordered a bolus dose of 50mg. Calculate the volume to be delivered. 500mg / 50ml = 10mg/ml 50mg / 10mg/ml = 5ml
13. IV therapy is ordered for Mr R. He is to have 2 litres of 0.9% Saline over 12 hours. Assuming the giving set delivers 20 drops per ml, calculate the rate of infusion in drops per minute. 2000ml / 12hours= 167ml/ hr