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hesi practice
HESI Dosage Calculations Practice Exam, Hesi
Pharmacology Review
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 medication 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 ml = 695 ml total fluid balance
(Intake - output).
,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
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
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 many tablets should the nurse administer? (Enter numeric
value only.) - ✔✔ANSWER ✔✔-3
Using D/H: 7.5 mg / 2.5 mg = 3 tablets
,The healthcare provider prescribes trimethoprim-
sulfamethoxazole (Bactrim-DS Oral Suspension) 120 mg BID for
a child with bronchitis. 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
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 Percent 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.
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
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 concentration? (Enter numeric value
only. If rounding is required, round to the nearest whole
number.) - ✔✔ANSWER ✔✔-120
8 grams = 8,000 mg prescribed dose. Using the formula, D/H x
Q, 8,000 mg / 200 mg x 1 ml = 40 ml of the 20% solution. Dilute
the 40 ml to a 1:4 concentration for administration using ratio
and proportion, 1 : 4 solution :: 40 ml : X X= 160 ml total
volume to administer. Subtract total volume of 160 ml - 40 ml
of 20% concentration = 120 ml diluent is added to obtain a 1:4
concentration.