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HESI Dosage Calculations Practice Test QUESTIONS AND
DETAILED ANSWERS | 100% VERIFIED CORRECT | GRADE
A+
A client who has a gastrostomy feeding tube is receiving 3/4 strength
Ensure 240 ml every 6 hours. Full strength Ensure is available in a 240
ml can. The nurse should use how many ml of Ensure to prepare the
feeding? (Enter numeric value only. If needed, round to the nearest
whole number.) ......ANSWER......180
240 ml Ensure : 1 :: X ml Ensure : 0.75 240/X : .75 X = 240 x 0.75 =
180 ml Ensure + 60 ml water = 240 ml
0.9% normal saline with inamrinone (Inocor) 0.1 grams/100 ml is
prescribed for a client with heart failure. The medication is to be
delivered at a rate of 400 mcg/minute. The nurse should program the
infusion pump to deliver how many ml/hour? (Enter numeric value only.
If rounding is required, round to the nearest whole number.)
......ANSWER......24
First calculate the number of mcg/hour: 400 mcg x 60 minutes = 24000
mcg/hour. Next calculate the number of ml/hour needed to
administer 24,000 mcg/hour: 100,000 mcg: 100ml :: 24,000 mcg : X
100,000/24,000 :: 100/X 100,000X = 2,400,000 X = 24 ml/hour.
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A client experiencing cardiogenic shock receives a prescription for an IV
infusion of 0.9% normal saline with milrinone (Primacor) 10 mg in 100
ml at a rate of 46 mcg/minute. The nurse should program the infusion
pump to deliver how many ml/hour? (Enter numeric value only. If
rounding is required, round to the nearest whole number.)
......ANSWER......28
First calculate the number of mcg/hour: 46 mcg x 60 minutes = 2760
mcg/hour. Next calculate the number of ml/hour needed to
administer 2760 mcg/hour: 10,000 mcg : 100 ml :: 2760 mcg : X 10,000
/ 2760 :: 100 / X 10,000X = 276000 X = 27.6 (rounded to) 28 ml/hour.
A client with septic shock receives a prescription for dextrose 5% in
water with dopamine (Intropin) 0.6 grams/250 ml at a rate of 5
mcg/kg/minute. The client's weight is 148 lbs. 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 whole number.)
......ANSWER......8
First convert the weight into kilograms: 148 pounds/2.2 kg = 67 kg.
Next calculate the number of mcg/kg/minute: 5 x 67 x 1 minute = 335
mcg/min. Calculate the number of mcg/hour: 335 x 60 minutes =
20,100 mcg/hour. Now calculate the number of ml/hour needed to
administer 20,100 mcg/hour: 600,000 mcg : 250 ml :: 20,100 mcg : X
ml 600,000/20100 :: 250/X 600,000X = 5,02500 X = 8.375 (rounded to)
8 ml/hour.
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A client with type 2 diabetes is receiving metformin (Glucophage) 1
gram PO twice daily. The medication is available in 500 mg tablets. How
many tablets should the nurse administer? (Enter numeric value only.)
......ANSWER......2
Using the known equivalent, 1 gram = 1000 mg, the nurse should first
convert the dose to the same unit of measurement, which is 1 gram =
1000 mg. Using the formula, Desired / Available x 1 tablets: 1000 mg /
500 mg x 1 = 2 tablets
A client with Mycobacterium avium complex (MAC) is receiving an
infusion of 5 % dextrose in water with amikacin (Amikin) 0.572
grams/100 ml every 12 hours. The nurse prepares the dose of amikacin
using a vial labeled, 250 mg/ml. How many ml should the nurse add to
the infusion? (Enter numeric value only. If rounding is required, round
to the nearest tenth.) ......ANSWER......2.3
First convert gram to milligram: 1 gm = 1000mg .572 gram x 1000 =
572 mg. Next use the formula D/H x Q: 572/250 x 1 = 2.288 (rounded
to) 2.3 ml.
A client with pericardial effusion has phrenic nerve compression
resulting in recurrent hiccups. The healthcare provider prescribes
metoclopramide (Reglan) liquid 10 mg PO q 6 hours. Reglan is available
as 5 mg/5 ml. A measuring device marked in teaspoons is being used.
How many teaspoons should the nurse administer? ......ANSWER......2
HESI Dosage Calculations Practice Test QUESTIONS AND
DETAILED ANSWERS | 100% VERIFIED CORRECT | GRADE
A+
A client who has a gastrostomy feeding tube is receiving 3/4 strength
Ensure 240 ml every 6 hours. Full strength Ensure is available in a 240
ml can. The nurse should use how many ml of Ensure to prepare the
feeding? (Enter numeric value only. If needed, round to the nearest
whole number.) ......ANSWER......180
240 ml Ensure : 1 :: X ml Ensure : 0.75 240/X : .75 X = 240 x 0.75 =
180 ml Ensure + 60 ml water = 240 ml
0.9% normal saline with inamrinone (Inocor) 0.1 grams/100 ml is
prescribed for a client with heart failure. The medication is to be
delivered at a rate of 400 mcg/minute. The nurse should program the
infusion pump to deliver how many ml/hour? (Enter numeric value only.
If rounding is required, round to the nearest whole number.)
......ANSWER......24
First calculate the number of mcg/hour: 400 mcg x 60 minutes = 24000
mcg/hour. Next calculate the number of ml/hour needed to
administer 24,000 mcg/hour: 100,000 mcg: 100ml :: 24,000 mcg : X
100,000/24,000 :: 100/X 100,000X = 2,400,000 X = 24 ml/hour.
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A client experiencing cardiogenic shock receives a prescription for an IV
infusion of 0.9% normal saline with milrinone (Primacor) 10 mg in 100
ml at a rate of 46 mcg/minute. The nurse should program the infusion
pump to deliver how many ml/hour? (Enter numeric value only. If
rounding is required, round to the nearest whole number.)
......ANSWER......28
First calculate the number of mcg/hour: 46 mcg x 60 minutes = 2760
mcg/hour. Next calculate the number of ml/hour needed to
administer 2760 mcg/hour: 10,000 mcg : 100 ml :: 2760 mcg : X 10,000
/ 2760 :: 100 / X 10,000X = 276000 X = 27.6 (rounded to) 28 ml/hour.
A client with septic shock receives a prescription for dextrose 5% in
water with dopamine (Intropin) 0.6 grams/250 ml at a rate of 5
mcg/kg/minute. The client's weight is 148 lbs. 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 whole number.)
......ANSWER......8
First convert the weight into kilograms: 148 pounds/2.2 kg = 67 kg.
Next calculate the number of mcg/kg/minute: 5 x 67 x 1 minute = 335
mcg/min. Calculate the number of mcg/hour: 335 x 60 minutes =
20,100 mcg/hour. Now calculate the number of ml/hour needed to
administer 20,100 mcg/hour: 600,000 mcg : 250 ml :: 20,100 mcg : X
ml 600,000/20100 :: 250/X 600,000X = 5,02500 X = 8.375 (rounded to)
8 ml/hour.
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A client with type 2 diabetes is receiving metformin (Glucophage) 1
gram PO twice daily. The medication is available in 500 mg tablets. How
many tablets should the nurse administer? (Enter numeric value only.)
......ANSWER......2
Using the known equivalent, 1 gram = 1000 mg, the nurse should first
convert the dose to the same unit of measurement, which is 1 gram =
1000 mg. Using the formula, Desired / Available x 1 tablets: 1000 mg /
500 mg x 1 = 2 tablets
A client with Mycobacterium avium complex (MAC) is receiving an
infusion of 5 % dextrose in water with amikacin (Amikin) 0.572
grams/100 ml every 12 hours. The nurse prepares the dose of amikacin
using a vial labeled, 250 mg/ml. How many ml should the nurse add to
the infusion? (Enter numeric value only. If rounding is required, round
to the nearest tenth.) ......ANSWER......2.3
First convert gram to milligram: 1 gm = 1000mg .572 gram x 1000 =
572 mg. Next use the formula D/H x Q: 572/250 x 1 = 2.288 (rounded
to) 2.3 ml.
A client with pericardial effusion has phrenic nerve compression
resulting in recurrent hiccups. The healthcare provider prescribes
metoclopramide (Reglan) liquid 10 mg PO q 6 hours. Reglan is available
as 5 mg/5 ml. A measuring device marked in teaspoons is being used.
How many teaspoons should the nurse administer? ......ANSWER......2
