NU371 WEEK 5 HESI PRACTICE TEST: DOSAGE CALCULATIONS ASSIGNMENT QUIZ AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

NU371 WEEK 5 HESI PRACTICE TEST: DOSAGE CALCULATIONS ASSIGNMENT QUIZ AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED Terms in this set (45) A client with coronary artery disease receives a prescription for clopidogrel (Plavix) 300 mg PO. The medication is available in 75 mg tablets. How many tablets should the nurse administer? o 4 · Using the formula, Desired/Have: 300 mg/75 mg = 4 tablets A client experiencing ventricular tachycardia receives a prescription a continuous infusion of dextrose 5% in water (D5W) 1000 ml with lidocaine (Xylocaine) 2 grams at a rate of 4 mg per minute. The nurse should program the infusion pump to deliver how many ml/hour? o 120 · First convert solution gram/ml to milligrams/ml: 2 gm/1000 ml = 2000 mg/1000 ml = 2 mg/mlNext calculate the number of mg/hour for the dose: 4 mg X 60 minutes = 240 mg/hour Next calculate the number of ml/hour needed to administer 240 mg/hour: 2000 mg: 1000 ml :: 240 mg : X ml 2000/240 = 1000/X X = 120 ml/hour Oxytocin (Pitocin) 4 milliunits/minute IV is prescribed for a client with an ineffective contraction pattern. To administer the prescribed dosage, the nurse adds 20 units of oxytocin to Ringer's Lactate 1,000 ml . The infusion pump should be set to deliver how many ml/hour. o 12 · 4 milliunits/min x 1 unit/1000 milliunits x 1000 ml/20 units x 60 min/hr = 240,000/20,000 = 12 ml/hour The healthcare provider prescribes a continuous infusion of dextrose 5% in water with isoproterenol (Isuprel) 2 mg in 500 ml at a rate of 5 mcg/minute for a client with cardiac arrhythmia. The nurse should program the infusion pump to deliver how many ml/hour? o 75 · First using the known conversion 1 mg = 1000 micrograms. Next, calculate the number of micrograms in solution: 1mg = 1000 mcg :: 2 mg = 2000 mcg Then calculate how many ml of solution contain 5 mcg dose/minute: 2000 mcg : 500ml :: 5 mcg : X ml 2000/5 :: 500/X X = 1.25 ml/minute Calculating ml/hour: 1.25 ml x 60 minutes = 75 ml/hour Amoxicillin 500 mg PO every 8 hours is prescribed for a client with an infection. The drug is available in a suspension of 125 mg/5ml. How many ml should the nurse o 20 ml. · 500 : X :: 125 : 5 125X = 2,500 administer with each dose? o 20 ml. o 4 ml. o 100 ml. o 10 ml. X = 20 ml The healthcare provider prescribes phytonadione (AquaMEPHYTON) 250 mcg IM to be administered to an infant within 1 hour of admission to the nursery. A 0.5 ml ampule labeled 2 mg in 1 ml is available. The nurse should administer how many ml? o 0.13 · Change mcg to mg, 1000 mcg = 1 mgUse ratio and proportion to calculate the dose: 2 mg : 1 ml :: 0.25 mg : X ml2X = 0.25 mgX = 0.125 =0.13 ml The nurse is preparing to administer vancomycin (Vancocin) 750 mg in 250 ml of Dextrose 5% in Water (D5W)over 75 minutes. The secondary infusion pump should be programmed to administer how many ml/hour? o 200 · 250 ml of the antibiotic is to infuse over 75 minutes or 1.25 hours 250 ml divided by 1.25 hour equals = 200 ml/hour A client who weighs 65 kg is receiving an infusion of Dextrose 5% in Water (D5W) 250 ml with dopamine 400 mg at 12 ml/hour. How many mcg/kg/minute is the client receiving? o 4.9 · Using the formula, mg/ml x 1000 ml x ml/hour / 60 / kg = mcg/kg/minute 400/250 x 1000 x 12 / 60 / 65 = 4.9 mcg/kg/minuteThe solution on hand is 1.6 mg/ml x 12 hours = 19.2 mg 19.2 mg x 1000 mcg = 19,200 mcg / 65 kg = 295.38 / 60 minutes = 4.92 = 4.9 A client with acute decompensated heart failure (HF) is to receive an IV infusion of 0.9% normal saline with inamrinone (Inocor) 0.1 grams/100 ml at a rate of 8 mcg/kg/minute. The client' s current weight is 183 lbs. The nurse should program the infusion pump to deliver how many ml/hour? o 40 · First convert the weight into kilograms: 183 pounds/2.2 kg = 83 kg Next calculate the number of mcg/kg/minute: 8 x 83 = 664 mcg/min Calculate the number of mcg/hour: 664 x 60 minutes = 39,840 mcg/hour Now calculate the number of ml/hour needed to administer 39,840 mcg/hour: 100,000 mcg : 250 ml :: 39,840 mcg : X = 100,000/39,840 :: 250/X and 100,000X = 3,984,000 X = 39.84 (rounded to) 40 ml/hour A client with a Trichomonas vaginalis infection receives a prescription for metronidazole (Flagyl) 1 gram. The medication is available in 500 mg tablets. How many tablets should the nurse administer? o 2 · 1 gram = 1000 mg 1 tablet :: 500 mg = X tablets :: 1000 mg X = 1000/500 = 2 tablets A client with Parkinson's disease is receiving benztropine (Cogentin) 3.5 mg PO twice daily. The medication is available in 0.5 mg tablets. How many tablets should the nurse administer for each dose? o 7 · Using D/H: 3.5 mg / 0.5 mg = 7 tablets The healthcare provider prescribes an intermittent infusion of nafcillin (Unipen) 800 mg IV for a pediatric client. The drug is dispensed in a concentration of 250 mg/ml, and the recommended infusion concentration is 40 mg/ml. When adding the prescribed dose to the volume control device, how many ml of IV solution should the nurse add to dilute? o 16.8 · First, calculate the amount of milliliters of medication needed to provide 800 mg of nafcillin. Prescribed dose (800 mg) divided by dose on hand (250 mg/ml) equals 3.2 mlNext, determine the recommended concentration using equivalent fractions. 800 mg/X = 40 mg/1 ml40X = 800 = 20 ml (the total volume at the recommended concentration)20 ml (total volume) minus the 3.2 ml (800 mg dose) equals an additional 16.8 ml of fluid to be added to the volume control device to obtain the recommended concentration. A client who has preeclampsia receives a prescription for an IV infusion of 0.9% normal saline with magnesium sulfate 4 gram/250 ml to be infused at a rate of 125 ml/hour. The nurse should administer how many mg/hour of magnesium sulfate? o 2000 · To calculate the amount of medication being delivered each hour: First convert grams to mg: 1 gram = 1000 mg :: 4 grams = 4000 mgNext calculate number of mg delivered/hour4000 mg : 250 ml :: X mg : 125 ml4000/X :: 250/= 250XX = 2000 mg/hour