Exam (elaborations)
Hesi Dosage Calculations
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- HESI Dosage Calculations Practice
Hesi Dosage Calculations
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Hesi Dosage CalculationsA male client receives a prescription for ondansetron hydrochloride (Zofran) 4
mg IV to prevent postoperative nausea after an inguinal hernia repair. The
medication is available in 2 mg/ml. How many ml should the nurse administer?
(Enter numeric value only.)
Use ratio and proportion, 4 mg : X ml = 2 mg : 1 ml 2X = 4 X = 2 - correct
answer-Use ratio and proportion, 4 mg : X ml = 2 mg : 1 ml 2X = 4 X = 2
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 numeric value
only. If rounding is required, round to the nearest tenth). - correct answer-Use
ratio and proportion, 5 mcg : X ml :: 10 mcg : 1ml 10X = 5 X = 0.5 ml
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 asset for additional information.) -
correct 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 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).
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 the numeric value only. If rounding is required, round to the
nearest whole number.) - correct 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 the
numeric value only.) - correct answer-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 the numerical
value only. If rounding is required, round to the whole number.) - correct
answer-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.
A child who weighs 55 pounds receives a prescription for atovaquone with
proguanil (Malarone Pediatric) 125 mg/50 mg PO daily. A drug reference
states that children 11 to 20 kg should receive 1 pediatric tablet daily; 21 to 30
kg should receive 2 pediatric tablets daily; 31 to 40 kg should receive 3
pediatric tablets daily; and greater than 40 kg should receive 1 adult tablet
daily with food. The drug is available as atovaquone 62.5 mg/proguanil 25 mg
pediatric tablets. How many tablets should the nurse administer? - correct
answer-Calculate each drug component dose, using the formula, D/H 125 mg
/ 62.5 mg (atovaquone) = 2 combined with 50 mg / 25 mg (proguanil) = 2. The
child should receive 2 tablets.
A child who is scheduled for a kidney transplant receives a prescription for
basiliximab (Simulect) 20 mg IV 2 hours prior to surgery. The medication is
available in a 20 mg vial that is reconstituted by adding 5 ml sterile water for
injection, and administered in a 50 ml bag of normal saline over 30 minutes.
The nurse should program the infusion pump to deliver how many ml/hour?
(Enter the numeric value only.) - correct answer-After reconstituting the
medication vial, the nurse adds the 5 ml of medication to the 50 ml of sterile
water to result in a 55 ml volume to infuse in 30 minutes. Using the formula,
Volume/Time = 55 ml / 0.5 hours = 110 ml/hour
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