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Med Math practice

 

Sample Problems for Basic Dosage Calculation

 

1. Order: Amoxicillin 0.25 g p.o. every 8 hours.

Available: Amoxicillin 125mg tablets.

How many tablets will the nurse give per dose?

 

2. Order: Zofran 8 mg PO TID.

Available: Zofran in a 100mL bottle labeled 4 mg/tsp.

How many mL will the nurse administer for each dose?

 

3. Order: Morphine gr 1/10

Available: Morphine 10mg/mL

How many mL will the nurse give?

 

Sample Problems for Pediatric Dose Calculation Based on Weight and BSA

4. Give Fortaz 50 mg/kg p.o. t.i.d. to a child who weighs 25.5 kg. Fortaz is available in an oral

suspension labeled 100mg/mL. How many mL would the nurse administer per dose?

 

 

5. Give Ceclor 45 mg/kg/day p.o. in 3 divided doses for a patient who weighs 66 pounds. A 75 mL

stock medication is labeled Ceclor 125mg/mL. How many mL would the nurse administer per

dose?

 

Sample Problems for I.V. Drip Rate Calculations and Infusion Times

8. LR 125 mL/hr via gravity flow using tubing calibrated at 15 gtt/mL. Calculate the flow rate.

 

 

9. One liter NS to infuse over 24 hours using a microdrip (gravity flow). Calculate the flow rate.

 

 

10.At the change of shift you notice 200 mL left to count in the I.V. bag. The I.V.is infusing at 80

mL/hr. How much longer will the I.V. run? (Express your answer in hours and minutes.)

 

 

11.Keflin 2 gin I00 mL DsW IVPB over 20 minutes. The I.V. tubing is 15 gtt/mL. Calculate the

flow rate.

 

 

Sample Problems for Continuous l.V. Heparin Drip Calculations

 

12.The physician writes an order for heparin 900 units/hr. The label on the I.V. bag reads: Heparin

10,000 units in 500 mL D5W. How many mL/hr will deliver the correct dose?

 

 

 

13._Administer Heparin 1,000 units/hr from an l.V. bag mixed 40,000 units in 1 L DsW. How many

mL/hr will deliver the correct amount of heparin?

 

 

14.The patient’s heparin is infusing at 28 mL/hr on an infusion pump. The bag of fluid is mixed

20,000 units of heparin in 500 mL D5W. What hourly dose of heparin is the patient receiving?

 

 

15.The patient’s heparin drip is infusing at 11 mL/hr on an infusion pump. The bag of fluid is mixed

25,000 units of heparin in 250 mL DsW. What hourly dose of heparin is the patient receiving?

 

 

Sample Problems for Critical Care Calculations for I.V. Infusions Calculating the ml /hr Rate

 

16.Give Regular insulin by continuous I.V. infusion at 20 units/hr. The solution is 250 mL NS with

100 units of Regular insulin. What rate on the infusion pump will deliver the correct dose?

 

 

17.Administer a Tbeophylline drip at 40 mg/hr 1.V. The solution is 250 mL DsW +Theophylline 500

mg. What rate on the infusion pump will deliver the correct dose per hour?

 

 

18.Give Tridil 15mcg/minute. Tridil is mixed 50 mg in 500 mL DsW. What rate on the infusion

pump will deliver the correct dose?

 

19.Give propofol 10mcg/kg/minute. The infusion is mixed propofol 250 mg in 250 mL DsW. The

patient weighs 168pounds. What rate on the infusion pump will deliver the correct dose?

 

20. Give Nitroprusside 5 mcg/kg/minute via continuous infusion for a patient weighing 205 lbs.

Nitroprusside is available in a solution of 200 mg in 250 mL D5W. What rate on the infusion pump

will deliver the correct dose?

 

21. Tridil is infusing at 15mL/hr on an infusion pump. The drug is mixed 50 mg in 500 mL DsW.

How many mcg/minute is the patient receiving?

 

 

22. A lidocaine drip is infusing at 30 mL/hr on an infusion device. The drug is mixed 2 g in 500 mL

DsW. How many mg/minute is the patient receiving?

 

 

 

23. Aminophylline is infusing at 30mL/hr. The drug is mixed 250 mg in 500 mL D5W. How many

mg/hr is the patient receiving?

 

SCIENCE
HEALTH SCIENCE
NURSING
NURS 120

 

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