MEDICATION CALCULATION TEST REVIEW Makeba Felton, RN, MSN, FNPC, WHNP Academic Counselor Fall, 2006

WHY IS THIS IMPORTANT?? PATIENT SAFETY COMPETENCY AS A NURSING STUDENT/ NURSE SMALL MISTAKES= BIG PROBLEMS

What to Review?? Handout Abbreviations (front cover of book) Conversions Medication dosages IV flow rates Heparin infusions IV drip rates

ABBREVIATIONS ac pc hs ou od q sq STAT tid bid qid mcg gtt IM

CONVERSIONS 1g= 1000 mg 1mg= _____ mcg 1mL= ____cc 1 L= 1000 mL 1tsp=5 mL 1T= _____ mL 1mL= ____cc 1 c = ____mL 1gr= _____mg 1oz= 30mL

MEDICATION DOSAGES RATIO AND PROPORTION…. DOSAGE DESIRED DOSAGE VOLUME ________________ X _______________ STOCK WEIGHT STOCK VOLUME (available)

MEDICATION DOSAGES 1. Order: 35 mg drug for your patient Available: 40 mg per 2.5ml What amount do you give….. Answer:____________

MEDICATION DOSAGES Order: 0.45mg for your patient Available: Tablets labeled 0.3mg What amount do you give….. Answer:____________

MEDICATION DOSAGES Order: 50mg IM of a drug Available: 80 mg per mL What amount do you give….. Answer:____________

MEDICATION DOSAGES Theophylline elixir 120 mg po bid. You have Theophylline elixir in 80 mg/15 mL solution available. How much will you give?? ________________

FORMULA….for drops per minute IV FLOW RATES FORMULA….for drops per minute x gtt = amount of solution x drop factor 1min time in min

Formula… volume in minutes IV FLOW RATES Formula… volume in minutes x gtt = Amount of solution x drop factor 1 min time in minutes

IV FLOW RATES Formula for volume per hour infusion… x mL = amount of solution (mL) 1 hour time in hours

IV FLOW RATES You need to administer D5W at 100mL/hr. The tubing drop factor is 10 gtt/ min. At what rate in gtt/min should the fluid be regulated at?? __________________

IV FLOW RATES 6. You need to administer 500 mL of D5W over 4 hours. Your drop factor is 15 gtt/min. Calculate the IV flow rate in gtt/min. ____________

IV FLOW RATES 7. How long will it take for 150 mL of solution to infuse at 25 mL/ hr?? ______________

IV FLOW RATES 8. A client is receiving 1000mL of D5LR at 100mL/ hr. How many hours will it take for the IV to infuse?? _________________

Units available = Units ordered HEPARIN INJECTIONS Formula… Units available = Units ordered in 1 mL x amount

HEPARIN INJECTIONS 9. You are to administer 2500 units of heparin. What you have available is 10,000 units/ mL. How much heparin do you administer?? __________________

HEPARIN INFUSIONS Formula… Units of heparin in sol’n = x units amount of sol’n hep rate of infusion is in

HEPARIN INFUSION You are to infuse 1200 units of heparin per hour of NS containing 20,000 units of heparin. What is the rate of infusion?? ______________