HESI DOSAGE CALCULATIONS PRACTICE EXAM

PDF Download

HESI DOSAGE CALCULATIONS PRACTICE EXAM

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -50 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: A client receives a prescription for azithromycin (Zithromax) 500 mg PO x 3 days. Azithromycin is available as 250 mg scored tablets. How many tablets should the nurse administer per dose? (Enter numeric value only.

Answer:

2 Using the formula, D/H 500 mg/250 mg = 2 tablets Question 2: A client with type 2 diabetes is receiving metformin (Glucophage) 1 gram PO twice daily. The medication is available in 500 mg tablets. How many tablets should the nurse administer? (Enter numeric value only.)

Answer:

2 Using the known equivalent, 1 gram = 1000 mg, the nurse should first convert the dose to the same unit of measurement, which is 1 gram = 1000 mg. Using the formula, Desired / Available x 1 tablets: 1000 mg / 500 mg x 1 = 2 tablets Question 3: A client receives a prescription for an intravenous infusion 0.45% sodium chloride 500 ml to be infused over 6 hours. 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.)

Answer:

83

Calculate using Volume/Time: 500 ml/6 hours = 83.3 ml/hour

Question 4: The healthcare provider prescribes a continuous intravenous infusion of dextrose 5% and 0.45% sodium chloride with KCl 20 mEq/1000 ml to be delivered over 8 hours. 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.)

Answer:

125

Using the formula volume/time: 1000 ml/8 hours = 125 ml/hour

Question 5: A client with cardiogenic shock weighs 220 lb and is receiving dopamine at the rate of 3 mcg/kg/minute. The solution strength available is dopamine 400 mg in 250 ml of D5W. The nurse should set the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer:

11.3 First, convert pounds to kg, 220 lb : X = 2.2 lb : 1 kg = 100 kg. Next, calculate the dosage per minute, 3 mcg/kg/min x 100 kg = 300 mcg/min. Convert mcg/min to mcg/hour, 300 mcg/min x 60 min=18,000 mcg/hour. Convert mcg/hr to mg/hour, 18,000 mcg/hr = 18.0 mg/hour. Calculate the rate, 400 mg : 250 ml = 18 mg : X ml 400X = 4500 X = 11.25 = 11.3 ml. So, 18 mg/11.3 ml should be infused at 11.3 ml/hour.Question 6: The nurse notes that a client is receiving an oxytocin (Pitocin) infusion via a pump that is programmed to deliver 30 ml/hour. The available solution is Ringer's Lactated 1,000 ml with Pitocin 20 units. How many milliunits/minute is the client receiving? (Enter numeric value only.)

Answer:

10 Convert units to milliunits, 20 x 1,000 = 20,000 units. Using D/H x Q = 30 ml/hour X/20,000 units x 1,000 ml = 30 ml/hour (60 minutes) X/20 =30/60, reduce X/2 = 1/2, and 2X = 20, so X = 10 milliunits/minute OR 20/1,000 = 0.02 1000 : 0.02 :: 30 : X = 0.6 :: 1,000X X = 600 and 600/60 = 10 milliunits/minute.Question 7: The healthcare provider prescribes acetaminophen elixir (Tylenol elixir) 600 mg PO q6 hours for an adult client experiencing pain associated with maxillofacial surgery. The bottle is labeled 500 mg/15 ml. How many ml should the nurse administer? (Enter numeric value only.If rounding is required, round to the nearest tenth.)

Answer:

18

Using the formula D/H x Q: 600 mg/500mg x 15 ml = 18 ml

Question 8: A child with a urinary tract infection is receiving Cephalexin (Keflex) 100 mg suspension PO QID. Keflex oral suspension is labeled 125 mg in 5 ml. How many ml should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer:

4 Using the formula Desired/Have available x Quantity: 100/125 x 5 = 500/125 = 4 ml

Question 9: A client who has a sinus infection is receiving a prescription for

amoxicillin/clavulanate potassium (Augmentin) 500 mg PO q8 hours. The available form is 250 mg amoxicillin/125mg clavulanate tablets. How many tablets should the nurse administer for each dose? (Enter numeric value only.)

Answer:

2

Using Desired/Available formula: 500 mg/250 mg x 1 tablet = 2

Question 10: A client scheduled for surgery is to receive an IV infusion of 0.9% sodium chloride with prochlorperazine edisylate (Compazine) 10 mg/50 ml over 30 minutes. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only.)

Answer:

100 Calculate: 50 ml : 30 minutes :: X ml : 60 minutes 50/X :: 30/60 3000 = 15X X = 100 ml Question 11: A client with septic shock receives a prescription for dextrose 5% in water with dopamine (Intropin) 0.6 grams/250 ml at a rate of 5 mcg/kg/minute. The client's weight is 148 lbs.The nurse should set the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

Answer:

8 First convert the weight into kilograms: 148 pounds/2.2 kg = 67 kg. Next calculate the number of mcg/kg/minute: 5 x 67 x 1 minute = 335 mcg/min. Calculate the number of mcg/hour: 335 x 60 minutes = 20,100 mcg/hour. Now calculate the number of ml/hour needed to administer 20,100 mcg/hour: 600,000 mcg : 250 ml :: 20,100 mcg : X ml 600,000/20100 :: 250/X 600,000X = 5,02500 X = 8.375 (rounded to) 8 ml/hour.Question 12: A healthcare provider prescribes a continuous infusion of 0.9% sodium chloride with pancuronium (Pavulon) 25 mg/250 ml at a rate of 0.1 mg/kg/hr for a client with coronary artery bypass grafting. The client weighs 78 kg. 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 tenth.

Answer:

78 First calculate the number of mg the client will receive in 1 hour: 0.1 mg x 78 kg = 7.8 mg/hour. Next calculate the number of ml containing 7.8 mg of medication: 25 mg : 250 ml :: 7.8 mg : X 25 mg/ 7.8 mg :: 250 ml/X 25X = 1950 X = 78 ml/hour.Question 13: 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 administer? (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 Question 14: The healthcare provider prescribes an IV solution of 5% dextrose in water with magnesium sulfate 4 gram/50 ml to be infused over 30 minutes for a client with preeclampsia.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.)

Answer:

100 To calculate the rate of infusion for ml/hour: 50 ml: 30 minutes :: X ml : 60 minutes 50 ml / X ml :: 30 min / 60 min 3000 = 30X X = 100 ml/hour Question 15: A client is receiving alprazolam (Xanax) 0.75 mg PO BID for anxiety. Alprazolam is available in 0.5 mg scored tablets. How many tablets should the nurse administer? (Enter numeric value only.)

Answer:

1.5

Using the conversion of 1 gram = 1000 mg: 0.1 gram = 100 mg 100 mg = 1 capsule

Question 16: The nurse is preparing to administer Hepatitis B Vaccine, Recombinant (Energix-B)

• 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:

• or 0.5

Use ratio and proportion, 5 mcg : X ml :: 10 mcg : 1ml 10X = 5 X = 0.5 ml