HESI Dosage Calculations Exam, Hesi
Pharmacology Review
. 1. 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.)
. Correct Responses: "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.
.
. 2.A client with hypertension who weighs 72.4 kg is receiving an
infusion of nitroprusside (Nipride) 50 mg in D5W 250 ml at 75 ml/hour.
How many mcg/kg/minute is the client receiving? (Enter numeric value
only. If rounding is required, round to the nearest tenth.)
. Correct Responses: "3.5"Calculate the mg/hour infusing, 50 mg : 250
ml = X : 75 ml 250X = 3750 and X = 15 mg/hour. Next, convert mg/hr to
mcg/hour, 15 mg/hour = 1 mg / 1000 mcg = 15,000 mcg/hour, then divide
by 60 min = 250 mcg/minute. Lastly, 250 mcg/72.4 kg/min = 3.45 = 3.5
mcg/kg/minute.
.
. 3. A client who weighs 70 kg is receiving a dopamine solution of 800
mg/500 ml normal saline at 5 ml/hour. How many mcg/kg/minute is the
client receiving? (Enter numeric value only. If rounding is required, round
to the nearest tenth.)
. Correct Responses: "1.9"To change ml/hour to mcg/kg/minute,
use the formula: desired rate (5 ml/hour) / volume available (500 ml) x
dose available (800 mg) = 8 mg/hour. Next, convert milligrams/hour to
mcg/kg/minute: mg (8) x 1000 / kg (70) / 60 minutes = 1.904 = 1.9
mcg/kg/minute.
.
,. 4. A client is receiving an IV solution of sodium chloride 0.9%
(Normal Saline) 250 ml with amiodarone (Cordarone) 1 gram at 17 ml/hour.
How many mg/minute of amiodarone is infusing? (Enter numeric value only.
If rounding is required, round to the nearest tenth.)
. Correct Responses: "1.1, 1"Convert grams to mg, 1 gram equals 1,000
mg. Using ratio and proportion - 1,000 mg : 250 ml :: X mg : 1ml 250X= 1,000
so X = 4 mg/ml is the solution concentration of amiodarone. The infusion
rate (ml/hour) x concentration (mg/ml) divided by 60 minutes/hour 17
ml/hour x 4 mg/ml = 68/60 = 1.13 = 1.1 mg/minute.
.
. 5. A client who weighs 176 pounds is receiving an IV infusion with
, esmolol hydrochloride (Brevibloc) at 48 ml/hour. The IV solution is labeled
with the concentration of Brevibloc 10 mg/ml. How many mcg/kg/minute is
the client receiving? (Enter numeric value only.)
. Correct Responses: "100"Convert pounds to kg by dividing 176
pounds by 2.2 pounds = 80 kg. Convert the IV concentration from mg to
mcg. 1 mg : 1000 mcg :: 10 mg : 10,000 mcg. Infusion rate (48 ml/hour) x
concentration (10,000 mcg/ml) divided by 60 minutes/hour x 80 kg = 48 x
10,000 divided by 60 x 80 = 480, = 100 mcg/kg/minute.
.
. 6. The nurse is preparing the change-of-shift report for a client who
has a 265 ml secondary infusion that was started 2 hours ago at a rate of
85 ml/hour via an infusion pump. The nurse should report that how many
ml remain to be infused by the on-coming nurse? (Enter numeric value
only.)
. Correct Responses: "95"85 ml x 2 hours = 170 ml has infused. 265
ml (total amount to be infused) - 170 ml (amount infused) = 95 ml remain
to be infused.
.
. 7.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.)
. Correct Responses: "2"Use ratio and proportion, 4 mg : X ml = 2 mg :
1 ml 2X = 4 X = 2
.
. 8. 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 Responses: "0.5, 1"Use ratio and proportion, 5 mcg : X ml ::
10 mcg : 1ml 10X = 5 X = 0.5 ml
.
. 9. A client's daily PO prescription for aripiprazole (Abilify) is
increased from 15 mg to 30 mg. The medication is available in 15 mg tablets,
and the client already received one tablet today. How many additional
tablets should the nurse administer so the client receives the total newly
prescribed dose for the day? (Enter numeric value only.)
. Correct Responses: "1"30 mg (total dose) - 15 mg (dose
already administered) = 15 mg that still needs to be administered.
Using the Desired/Have formula: 15 mg/15 mg = 1 tablet
Pharmacology Review
. 1. 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.)
. Correct Responses: "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.
.
. 2.A client with hypertension who weighs 72.4 kg is receiving an
infusion of nitroprusside (Nipride) 50 mg in D5W 250 ml at 75 ml/hour.
How many mcg/kg/minute is the client receiving? (Enter numeric value
only. If rounding is required, round to the nearest tenth.)
. Correct Responses: "3.5"Calculate the mg/hour infusing, 50 mg : 250
ml = X : 75 ml 250X = 3750 and X = 15 mg/hour. Next, convert mg/hr to
mcg/hour, 15 mg/hour = 1 mg / 1000 mcg = 15,000 mcg/hour, then divide
by 60 min = 250 mcg/minute. Lastly, 250 mcg/72.4 kg/min = 3.45 = 3.5
mcg/kg/minute.
.
. 3. A client who weighs 70 kg is receiving a dopamine solution of 800
mg/500 ml normal saline at 5 ml/hour. How many mcg/kg/minute is the
client receiving? (Enter numeric value only. If rounding is required, round
to the nearest tenth.)
. Correct Responses: "1.9"To change ml/hour to mcg/kg/minute,
use the formula: desired rate (5 ml/hour) / volume available (500 ml) x
dose available (800 mg) = 8 mg/hour. Next, convert milligrams/hour to
mcg/kg/minute: mg (8) x 1000 / kg (70) / 60 minutes = 1.904 = 1.9
mcg/kg/minute.
.
,. 4. A client is receiving an IV solution of sodium chloride 0.9%
(Normal Saline) 250 ml with amiodarone (Cordarone) 1 gram at 17 ml/hour.
How many mg/minute of amiodarone is infusing? (Enter numeric value only.
If rounding is required, round to the nearest tenth.)
. Correct Responses: "1.1, 1"Convert grams to mg, 1 gram equals 1,000
mg. Using ratio and proportion - 1,000 mg : 250 ml :: X mg : 1ml 250X= 1,000
so X = 4 mg/ml is the solution concentration of amiodarone. The infusion
rate (ml/hour) x concentration (mg/ml) divided by 60 minutes/hour 17
ml/hour x 4 mg/ml = 68/60 = 1.13 = 1.1 mg/minute.
.
. 5. A client who weighs 176 pounds is receiving an IV infusion with
, esmolol hydrochloride (Brevibloc) at 48 ml/hour. The IV solution is labeled
with the concentration of Brevibloc 10 mg/ml. How many mcg/kg/minute is
the client receiving? (Enter numeric value only.)
. Correct Responses: "100"Convert pounds to kg by dividing 176
pounds by 2.2 pounds = 80 kg. Convert the IV concentration from mg to
mcg. 1 mg : 1000 mcg :: 10 mg : 10,000 mcg. Infusion rate (48 ml/hour) x
concentration (10,000 mcg/ml) divided by 60 minutes/hour x 80 kg = 48 x
10,000 divided by 60 x 80 = 480, = 100 mcg/kg/minute.
.
. 6. The nurse is preparing the change-of-shift report for a client who
has a 265 ml secondary infusion that was started 2 hours ago at a rate of
85 ml/hour via an infusion pump. The nurse should report that how many
ml remain to be infused by the on-coming nurse? (Enter numeric value
only.)
. Correct Responses: "95"85 ml x 2 hours = 170 ml has infused. 265
ml (total amount to be infused) - 170 ml (amount infused) = 95 ml remain
to be infused.
.
. 7.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.)
. Correct Responses: "2"Use ratio and proportion, 4 mg : X ml = 2 mg :
1 ml 2X = 4 X = 2
.
. 8. 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 Responses: "0.5, 1"Use ratio and proportion, 5 mcg : X ml ::
10 mcg : 1ml 10X = 5 X = 0.5 ml
.
. 9. A client's daily PO prescription for aripiprazole (Abilify) is
increased from 15 mg to 30 mg. The medication is available in 15 mg tablets,
and the client already received one tablet today. How many additional
tablets should the nurse administer so the client receives the total newly
prescribed dose for the day? (Enter numeric value only.)
. Correct Responses: "1"30 mg (total dose) - 15 mg (dose
already administered) = 15 mg that still needs to be administered.
Using the Desired/Have formula: 15 mg/15 mg = 1 tablet
