HESI Dosage Calculations Practice Exam |Questions and Verified Answers| 2023/2024 Update
Q: The nurse is preparing to administer Hepatitis B Vaccine, Recombinant (Energix-B) 5 mcg IM to a school-aged child. The vaccine is labeled, 10 mcg/ml. How many ml should the nurse administer? (Enter nume...
HESI Dosage Calculations Practice Exam |Questions and Verified Answers | 2023/2024 Update Q: The nurse is preparing to adminis ter Hepatitis B Vaccine, Recombinant (Energix -B) 5 mcg IM to a school -aged child. The vaccine is labeled, 10 mcg/ml. How many ml should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth). Answer: 1 or 0. 5 Use ratio and proportion, 5 mcg : X ml :: 10 mcg : 1ml 10X = 5 X = 0.5 ml Q: A client's daily PO prescription for aripiprazole (Abilify) is increased from 15 mg to 30 mg. The medication is available in 15 mg tablets, and the client already received one tablet today. How many additional tablets should the nurse administer so the client receives the total newly prescribed dose for the day? (Enter numeric value only.) Answer: 1 30 mg (total dose) - 15 mg (dose already administered) = 15 mg that still needs to be administered. Using the Desired/Have formula: 15 mg/15 mg = 1 tablet Q: At the end of the shift, the nurse is recording the fluid balance for a client receiving a continuous gastrostomy tube (GT) feeding. Based on the client's records, how many ml should the nurse record for the total fluid balance (intake - output) for the shift that started at 0700 and ended at 1900? (Enter numeric value only.) (Click on each image as set for additional information.) Answer: 695 The tube feeding is administered at 75 ml/hour for 11 hours (0700 - 1800) and then turned off for one hour because the residual is greater than 200 ml. 11 hours x 75 ml/hr = 825 ml. Three doses of 20 ml of me dication are administered, with 10 ml of water used to flush the GT before and after each dose. 20 ml x 3 doses = 60 ml; 10 ml (flush) x 2 x 3 doses = 60 ml; so 825 ml + 60 ml + 60 ml = 945 ml. 250 ml of residual is removed and not replaced. 945 ml - 250 m l = 695 ml total fluid balance (Intake - output). Q: The nurse is administering a 250 milliliter (ml) intravenous solution to be infused over 2 hours. How many ml/hour should the nurse program the infusion pump? (Enter numeric value only.) Answer: 125 250 ml : 2 hours = X ml : 1 hour 250 = 2X X = 250 divided by 2 = 125 ml/hr Q: The nurse is preparing to administer 0.25 mg of bumetanide (Bumex) IV. The medication is available in a vial labeled 1 mg/4 ml. How many ml of medication should the nurse ad minister? (Enter numeric value only.) Answer: 1 Using the Desired/Have x Volume formula: Desired = 0.25 mg Have = 1 mg Volume = 4 ml 0.25 mg/1 mg x 4 ml = 1 ml Q: A client with hypertension receives a prescription for carteolol (Cartel) 7.5 mg PO daily. The drug is available in 2.5 mg tablets. How ma ny tablets should the nurse administer? (Enter numeric value only.) Answer: 3 Using D/H: 7.5 mg / 2.5 mg = 3 tablets Q: The healthcare provider prescribes trimethoprim -sulfamethoxazole (Bactrim -DS Oral Suspension) 120 mg BID for a child with bronchit is. The Bactrim bottle is labeled 200 mg/5ml. How many ml should the nurse administer at each dose? (Enter numeric value only.) Answer: 3 Using the formula D/H x Q, 120/200 x 5 = 3 ml Q: A 180 -pound adult male is admitted to the Emergency Center after receiving thermal burns to 60 percent of his body. Using the Parkland formula of 4 ml/kg/24 hours, the client should receive how many ml of fluid during the first 24 hours? (Enter numeric value only. If rounding is required, round to the nearest whole number.) Answer: 19632 Using the Parkland formula, the client's fluid requirements for the first 24 hours after injury: 4 ml lactated Ringer's solution x Body weight (in kilograms) x Percen t burn. Convert 180 pounds to kg = .2 = 81.8 kg 4 ml x 81.8 kg x 60 = 19632 ml over the first 24 hours. Q: The healthcare provider prescribes acetazolamide (Diamox) 600 mg/m2/day divided into 3 doses. The nurse calculates the child's body surface area (BSA) as 0.7 m2. How many mg should the child receive per dose? (Enter numeric value only.) Answer: 140 Using the child's BSA, 0.7 m2, calculate the mg/dose, 600 mg x 0.7 m2 = 420 mg/day/3 doses = 140 mg/dose Q: A loading dose of acetylcysteine (Mucomyst) 8 grams, which is available as a 20% solution (200 mg acetylcysteine per ml) is prescribed by nasogastric tube for a client with acetaminophen toxicity. How many ml of diluent should be added to the medication to obtain a 1:4
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