Dosage Calculations Assignment Quiz

A client who had a small bowel resection two weeks ago is receiving 3/4 strength Ensure feedings 275 ml every 4 hours via nasogastric tube. Full strength Ensure is available in a 240 ml can. The nurse should use how many ml of Ensure to prepare the feeding? (Enter numeric value only. Round to nearest whole number if needed.) - Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275 = 0.75 x 275 = 206 Ensure 206 ml Ensure + 69 ml water = 275 ml (75% solution) A client admitted to the unit from the emergency room receives a prescription for an IV infusion of 0.9% sodium chloride 1,000 ml at 750 ml/4 hours. The IV administration set delivers 60 gtts/ml. The nurse should regulate the infusion to deliver how many gtts/minute? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - First convert hours to minutes: 4 hours x 60 = 240 minutesUsing formula Volume/Time x gtt factor: 750 ml/240 min = 3.125 x 60gtts = 187.5 (rounding to) 188 gtts/minute The nurse is preparing a tube feeding of Ensure 280 ml (50% solution). Full strength Ensure is available in a 240 ml can. The nurse should use how many ml of Ensure to prepare the feeding? (Enter numeric value for only. If rounding is required, round to nearest whole number.) - Using the formula D/H (Desired % / % on Hand) x Total volume desired: 50/100 x 280ml = 0.5 x 280 ml = 140 ml Ensure + 140 ml water = 280 ml (50% solution) A client scheduled for a stress echocardiogram is to receive an IV infusion of Dextrose 5% in Water (D5W) with dobutamine (Dobutrex) 0.5 grams/250 ml at a rate of 1,200 mcg/minute. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - First calculate the number of mcg/hour: 1,200 x 60 minutes = 72,000 mcg/hourNext calculate the number of ml/hour needed to administer 72,000 mcg/hour500,000 mcg : 250 ml :: 72,000 mcg : X500,000 / 72,000 :: 250 / X500,000X = 18,000,000X = 36 ml/hour 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? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - 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/hourNext calculate the number of ml/hour needed to administer 240 mg/hour: 2000 mg: 1000 ml :: 240 mg : X ml2000/240 = 1000/XX = 120 ml/hour 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? (Enter numeric value only. If rounding is required, round to the nearest tenth.) - 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. The nurse programs an IV infusion pump of Ringer's Lactated 1,000 ml with oxytocin (Pitocin) 40 units to be delivered at 15 ml/hour. How many milliunits/minute is the client receiving? (Enter numeric value only, whole number.) - Convert units to milliunits, 40 x 1,000 = 40,000 milliunits. Using D/H x Q = 15 ml/hour: X/40,000 milliunits x 1,000 ml = 15 ml/hour (60 minutes) X/40 =15/60 60X = 600 X = 10 Fill in the blank 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? (Enter numeric value only. If rounding is required, round to the nearest hundredth.) - 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