Dosage Calculations - Questions And
Answers
A 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 =
4X=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
Answers
A 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 =
4X=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
