HESI Dosage Calculations Practice Exam
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1. A client with cardiogenic shock 11.3
weighs 220 lb and is receiv-
ing dopamine at the rate of First, convert pounds to kg, 220 lb : X = 2.2 lb : 1
3 mcg/kg/minute. The solution kg = 100 kg. Next, calculate the dosage per minute, 3
strength available is dopamine mcg/kg/min x 100 kg = 300 mcg/min. Convert mcg/min
400 mg in 250 ml of D5W. to mcg/hour, 300 mcg/min x 60 min=18,000 mcg/hour.
The nurse should set the infu- Convert mcg/hr to mg/hour, 18,000 mcg/hr = 18.0
sion pump to deliver how many mg/hour. Calculate the rate, 400 mg : 250 ml = 18 mg
ml/hour? (Enter numeric value : X ml 400X = 4500 X = 11.25 = 11.3 ml. So, 18 mg/11.3
only. If rounding is required, round ml should be infused at 11.3 ml/hour.
to the nearest tenth.)
2. A client with hypertension who 3.5
weighs 72.4 kg is receiving an infu-
sion of nitroprusside (Nipride) 50 Calculate the mg/hour infusing, 50 mg : 250 ml = X :
mg in D5W 250 ml at 75 ml/hour. 75 ml 250X = 3750 and X = 15 mg/hour. Next, con-
How many mcg/kg/minute is the vert mg/hr to mcg/hour, 15 mg/hour = 1 mg / 1000
client receiving? (Enter numeric mcg = 15,000 mcg/hour, then divide by 60 min = 250
value only. If rounding is required, mcg/minute. Lastly, 250 mcg/72.4 kg/min = 3.45 = 3.5
round to the nearest tenth.) mcg/kg/minute.
3. A client who weighs 70 kg 1.9
is receiving a dopamine solu-
tion of 800 mg/500 ml normal To change ml/hour to mcg/kg/minute, use the formula:
saline at 5 ml/hour. How many desired rate (5 ml/hour) / volume available (500 ml)
mcg/kg/minute is the client receiv- x dose available (800 mg) = 8 mg/hour. Next, convert
ing? (Enter numeric value only. If milligrams/hour to mcg/kg/minute: mg (8) x 1000 / kg
rounding is required, round to the (70) / 60 minutes = 1.904 = 1.9 mcg/kg/minute.
nearest tenth.)
4. A client is receiving an IV solution Convert grams to mg, 1 gram equals 1,000 mg. Using
of sodium chloride 0.9% (Normal ratio and proportion - 1,000 mg : 250 ml :: X mg : 1ml
, HESI Dosage Calculations Practice Exam
Study online at https://quizlet.com/_519zf3
Saline) 250 ml with amiodarone 250X= 1,000 so X = 4 mg/ml is the solution concentration
(Cordarone) 1 gram at 17 ml/hour. of amiodarone. The infusion rate (ml/hour) x concentra-
How many mg/minute of amio- tion (mg/ml) divided by 60 minutes/hour 17 ml/hour x
darone is infusing? (Enter numeric 4 mg/ml = 68/60 = 1.13 = 1.1 mg/minute.
value only. If rounding is required,
round to the nearest tenth.)
5. A client who weighs 176 pounds 100
is receiving an IV infusion with es-
molol hydrochloride (Brevibloc) at Convert pounds to kg by dividing 176 pounds by 2.2
48 ml/hour. The IV solution is la- pounds = 80 kg. Convert the IV concentration from mg
beled with the concentration of to mcg. 1 mg : 1000 mcg :: 10 mg : 10,000 mcg. Infusion
Brevibloc 10 mg/ml. How many rate (48 ml/hour) x concentration (10,000 mcg/ml) di-
mcg/kg/minute is the client receiv- vided by 60 minutes/hour x 80 kg = 48 x 10,000 divided
ing? (Enter numeric value only.) by 60 x 80 = 480, = 100 mcg/kg/minute.
6. The nurse is preparing the 95
change-of-shift report for a client
who has a 265 ml secondary in- 85 ml x 2 hours = 170 ml has infused. 265 ml (total
fusion that was started 2 hours amount to be infused) - 170 ml (amount infused) = 95
ago at a rate of 85 ml/hour via an ml remain to be infused.
infusion pump. The nurse should
report that how many ml remain
to be infused by the on-coming
nurse? (Enter numeric value only.)
7. A male client receives a prescrip- 2
tion for ondansetron hydrochlo-
ride (Zofran) 4 mg IV to prevent Use ratio and proportion, 4 mg : X ml = 2 mg : 1 ml 2X =
postoperative nausea after an in- 4 X = 2
guinal hernia repair. The medica-
tion is available in 2 mg/ml. How
, HESI Dosage Calculations Practice Exam
Study online at https://quizlet.com/_519zf3
many ml should the nurse admin-
ister? (Enter numeric value only.)
8. The nurse is preparing to admin- 1 or 0.5
ister Hepatitis B Vaccine, Recom-
binant (Energix-B) 5 mcg IM to a Use ratio and proportion, 5 mcg : X ml :: 10 mcg : 1ml
school-aged child. The vaccine is 10X = 5 X = 0.5 ml
labeled, 10 mcg/ml. How many ml
should the nurse administer? (En-
ter numeric value only. If rounding
is required, round to the nearest
tenth).
9. A client's daily PO prescription for 1
aripiprazole (Abilify) is increased
from 15 mg to 30 mg. The medica- 30 mg (total dose) - 15 mg (dose already administered)
tion is available in 15 mg tablets, = 15 mg that still needs to be administered. Using the
and the client already received one Desired/Have formula: 15 mg/15 mg = 1 tablet
tablet today. How many additional
tablets should the nurse adminis-
ter so the client receives the total
newly prescribed dose for the day?
(Enter numeric value only.)
10. At the end of the shift, the nurse 695
is recording the fluid balance for a
client receiving a continuous gas- The tube feeding is administered at 75 ml/hour for 11
trostomy tube (GT) feeding. Based hours (0700 - 1800) and then turned off for one hour
on the client's records, how many because the residual is greater than 200 ml. 11 hours x
ml should the nurse record for the 75 ml/hr = 825 ml. Three doses of 20 ml of medication
total fluid balance (intake - output) are administered, with 10 ml of water used to flush the
for the shift that started at 0700 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 +
Study online at https://quizlet.com/_519zf3
1. A client with cardiogenic shock 11.3
weighs 220 lb and is receiv-
ing dopamine at the rate of First, convert pounds to kg, 220 lb : X = 2.2 lb : 1
3 mcg/kg/minute. The solution kg = 100 kg. Next, calculate the dosage per minute, 3
strength available is dopamine mcg/kg/min x 100 kg = 300 mcg/min. Convert mcg/min
400 mg in 250 ml of D5W. to mcg/hour, 300 mcg/min x 60 min=18,000 mcg/hour.
The nurse should set the infu- Convert mcg/hr to mg/hour, 18,000 mcg/hr = 18.0
sion pump to deliver how many mg/hour. Calculate the rate, 400 mg : 250 ml = 18 mg
ml/hour? (Enter numeric value : X ml 400X = 4500 X = 11.25 = 11.3 ml. So, 18 mg/11.3
only. If rounding is required, round ml should be infused at 11.3 ml/hour.
to the nearest tenth.)
2. A client with hypertension who 3.5
weighs 72.4 kg is receiving an infu-
sion of nitroprusside (Nipride) 50 Calculate the mg/hour infusing, 50 mg : 250 ml = X :
mg in D5W 250 ml at 75 ml/hour. 75 ml 250X = 3750 and X = 15 mg/hour. Next, con-
How many mcg/kg/minute is the vert mg/hr to mcg/hour, 15 mg/hour = 1 mg / 1000
client receiving? (Enter numeric mcg = 15,000 mcg/hour, then divide by 60 min = 250
value only. If rounding is required, mcg/minute. Lastly, 250 mcg/72.4 kg/min = 3.45 = 3.5
round to the nearest tenth.) mcg/kg/minute.
3. A client who weighs 70 kg 1.9
is receiving a dopamine solu-
tion of 800 mg/500 ml normal To change ml/hour to mcg/kg/minute, use the formula:
saline at 5 ml/hour. How many desired rate (5 ml/hour) / volume available (500 ml)
mcg/kg/minute is the client receiv- x dose available (800 mg) = 8 mg/hour. Next, convert
ing? (Enter numeric value only. If milligrams/hour to mcg/kg/minute: mg (8) x 1000 / kg
rounding is required, round to the (70) / 60 minutes = 1.904 = 1.9 mcg/kg/minute.
nearest tenth.)
4. A client is receiving an IV solution Convert grams to mg, 1 gram equals 1,000 mg. Using
of sodium chloride 0.9% (Normal ratio and proportion - 1,000 mg : 250 ml :: X mg : 1ml
, HESI Dosage Calculations Practice Exam
Study online at https://quizlet.com/_519zf3
Saline) 250 ml with amiodarone 250X= 1,000 so X = 4 mg/ml is the solution concentration
(Cordarone) 1 gram at 17 ml/hour. of amiodarone. The infusion rate (ml/hour) x concentra-
How many mg/minute of amio- tion (mg/ml) divided by 60 minutes/hour 17 ml/hour x
darone is infusing? (Enter numeric 4 mg/ml = 68/60 = 1.13 = 1.1 mg/minute.
value only. If rounding is required,
round to the nearest tenth.)
5. A client who weighs 176 pounds 100
is receiving an IV infusion with es-
molol hydrochloride (Brevibloc) at Convert pounds to kg by dividing 176 pounds by 2.2
48 ml/hour. The IV solution is la- pounds = 80 kg. Convert the IV concentration from mg
beled with the concentration of to mcg. 1 mg : 1000 mcg :: 10 mg : 10,000 mcg. Infusion
Brevibloc 10 mg/ml. How many rate (48 ml/hour) x concentration (10,000 mcg/ml) di-
mcg/kg/minute is the client receiv- vided by 60 minutes/hour x 80 kg = 48 x 10,000 divided
ing? (Enter numeric value only.) by 60 x 80 = 480, = 100 mcg/kg/minute.
6. The nurse is preparing the 95
change-of-shift report for a client
who has a 265 ml secondary in- 85 ml x 2 hours = 170 ml has infused. 265 ml (total
fusion that was started 2 hours amount to be infused) - 170 ml (amount infused) = 95
ago at a rate of 85 ml/hour via an ml remain to be infused.
infusion pump. The nurse should
report that how many ml remain
to be infused by the on-coming
nurse? (Enter numeric value only.)
7. A male client receives a prescrip- 2
tion for ondansetron hydrochlo-
ride (Zofran) 4 mg IV to prevent Use ratio and proportion, 4 mg : X ml = 2 mg : 1 ml 2X =
postoperative nausea after an in- 4 X = 2
guinal hernia repair. The medica-
tion is available in 2 mg/ml. How
, HESI Dosage Calculations Practice Exam
Study online at https://quizlet.com/_519zf3
many ml should the nurse admin-
ister? (Enter numeric value only.)
8. The nurse is preparing to admin- 1 or 0.5
ister Hepatitis B Vaccine, Recom-
binant (Energix-B) 5 mcg IM to a Use ratio and proportion, 5 mcg : X ml :: 10 mcg : 1ml
school-aged child. The vaccine is 10X = 5 X = 0.5 ml
labeled, 10 mcg/ml. How many ml
should the nurse administer? (En-
ter numeric value only. If rounding
is required, round to the nearest
tenth).
9. A client's daily PO prescription for 1
aripiprazole (Abilify) is increased
from 15 mg to 30 mg. The medica- 30 mg (total dose) - 15 mg (dose already administered)
tion is available in 15 mg tablets, = 15 mg that still needs to be administered. Using the
and the client already received one Desired/Have formula: 15 mg/15 mg = 1 tablet
tablet today. How many additional
tablets should the nurse adminis-
ter so the client receives the total
newly prescribed dose for the day?
(Enter numeric value only.)
10. At the end of the shift, the nurse 695
is recording the fluid balance for a
client receiving a continuous gas- The tube feeding is administered at 75 ml/hour for 11
trostomy tube (GT) feeding. Based hours (0700 - 1800) and then turned off for one hour
on the client's records, how many because the residual is greater than 200 ml. 11 hours x
ml should the nurse record for the 75 ml/hr = 825 ml. Three doses of 20 ml of medication
total fluid balance (intake - output) are administered, with 10 ml of water used to flush the
for the shift that started at 0700 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 +
