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Practice Math Calculations 1. You need to administer a 3 mg dose of a medication, on hand is 4 mg/ml. How much do you need to draw up? 2. 375 mg of a liquid medication is ordered. You have available 125mg per 5ml, how much do you pour? 3. 25 mg of a medication is ordered IV; the vial is labeled 5 mg/2 ml. How many mls will you give? 4. An order reads for 0.1 mg of a medication to be given pre-op; available solution is 0.4 mg/2 ml. How much will you give? 5. The physician orders 1.25 mg of a medication daily for your patient. The only available tablet strength is 0.625 mg. What amount will you give? 6. Motrin 0.6g is ordered; available tablets contain 600 mg. How many tablets will you give? 7. 0.5 mg of a medication is ordered; available tablets contain 0.25 mg per tablet. How many tablets will you give? 8. Convert 7.5 grams to milligrams. Converting Pounds to Kilograms30 lb = _____________15 lb 5 oz = _________7 ? lb = ____________22 lb = _____________4 lb 5 oz = __________75 lb = _____________10 ? lbs = __________Pediatric Dosage CalculationsProblem 1Child weighs 33 lbsPhysician order: Augmentin 150 mg po q 8 hoursInformation from drug guide: children < 40 kg receive 6.7 to 13.3 mg/kg q 8 hoursConvert 33 lbs to kg ________Calculate low and high dose _______ low dose _______ high doseIs the dose in the safe range? ___________The medication comes Augmentin 125 mg / 5 mLHow many mL would you need to draw up to equal 150 mg? _________Problem 2Child weighs 16 lb 10 ozPhysician order: Lasix 15 mg po bidInformation from drug guide: The initial dose of Lasix (furosemide) for infants or children is 2 mg / kg / dose.If initial dose works dosage may be increased to 1 or 2 mg / kg / dose (maintenance dose).Doses greater than 6 mg / kg / day are not recommended.Convert 16 lb 10 oz to kg ________Calculate initial and high dose _______ initial dose _______ high doseIs the dose in the safe range? ___________The medication comes: Furosemide 10 mg/mL How many mL would you need to draw up to equal 15 mg? _________Answer Sheet: 1. 0.75 cc 2. 15 ml 3. 10 ml 4. 0. 5ml 5. 2 tabs 6. 1 tab 7. 2 tabs 8. 7500 mg Converting1. 13.63 kg 2. 15.31 lb = 6.95 kg 3. 7.25 lb = 3.29 kg 4. 10 kg 5. 4.31 lb = 1.95 kg 6. 34.09 kg 7. 4.77kgAnswer problem 1:15 kgLow dose 100.5 mg (6.7 x 15 kg)High dose 199.5 mg (13.3 x 15 kg)Safe range (100.5 mg to 199.5 mg) 150 mg is a safe dose.You would give 6 mL Calculation 125 mg = 150 mg = 750 or 150125 X 5 =6ml 5 mL x mL 125 xAnswer Problem 216.62 pounds to 7.556 kg or 7.56 kgSingle dose of Lasix 7.56 kg x 2 mg = 15.12 mg/doseHigh range daily dose 7.56 kg x 6 mg = 45.36 mg/doseIs the dosage of 15 mg bid or 30 mg / day safe? = yes How many mL? 1.5 mL Calculation: 10 mg = 15 mg or 1510 X 1=1.5ml 1 mL x mL ................
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