Deck 4: Math Review and Dosage Calculations

Question 1

Match the correct metric conversion value with the corresponding household measure.

A) 10 milliliters equal 1 tablespoon
B) 5 milliliters equal 1 teaspoon
C) 1 grain equals 60 milligrams
D) 1500 milliliters equal 1.5 liters

Answer 1

5 milliliters equal 1 teaspoon

Question 2

Recall the definition of an improper fraction,and identify the correct numerical equivalent.

A) 3/5
B) 2/4
C) 1/3
D) 5/5

Answer 2

5/5

Question 3

Determine the correct dose of a drug to be administered at a dosage of 15 mg/kg for a patient who weighs 55 pounds and is 8 years old.

A) 125 mg
B) 250 mg
C) 375 mg
D) 425 mg

Answer 3

375 mg

Question 4

Select the correct number of drops per minute to be administered for a 500-ml Lactated Ringers IV given over 2 hours using an administration set labeled 15 drops per ml.

A) 32.5 drops/minute
B) 62.5 drops/minute
C) 40 drops/minute
D) 75 drops/minute

Question 5

Carry out the necessary calculations in order to administer the required number of tablets to a patient with an order for 60 mg of a drug that is available in 30-mg tablets.How many tablets will you administer?

A) 2 tablets
B) 1.5 tablets
C) 1 tablet
D) 0.5 tablet

Question 6

Carry out the necessary calculations to determine the number of teaspoons that should be administered for a dosage of 50 mg if you have the drug available in a concentration of 10 mg/ml.

A) 0.5 teaspoon
B) 1 teaspoon
C) 1.5 teaspoons
D) None of these are correct.

Question 7

Match the set of examples to the definition of a ratio.

A) 2.1, 3.5, 2.9
B) 1:5, 4:10, 10:100
C) The 3 in 3/4 or the 9 in 9/11
D) All of these are correct.

Question 8

You are reviewing dosage calculations with a new employee,and you summarize the dosage calculations based on weight as:

A) The amount of drug in mg ordered per unit of weight in kg.
B) The amount of drug in mg ordered per unit of weight in lb.
C) The amount of drug in ml ordered per unit of weight in kg.
D) None of these are correct.

Question 9

In summarizing the factors that affect IV solutions,you conclude that:

A) IV drug solutions must be free of organisms.
B) IV drug solutions must be compatible with all of the ingredients.
C) IV drug solutions must be adjusted to a targeted pH range.
D) All of these are correct.

Question 10

Carry out the necessary metric,apothecary,or household conversions to determine how many milliliters of cough syrup a nurse will give to a patient each day if the nurse is instructed to give the patient 2 teaspoons of cough syrup four times a day.

A) 20 ml
B) 30 ml
C) 40 ml
D) 50 ml

Question 11

Use Fried's rule to determine the necessary dose of drug Y routinely ordered for adults as 2 teaspoons every 4 hours.The child is 3.5 years old and weighs 36 pounds.

A) 2.8 ml
B) 2.6 ml
C) 2.4 ml
D) 2.2 ml

Question 12

Carry out the necessary calculations in order to administer the required number of tablets to a patient with an order for 0.25 mg of digoxin,which is available in 250-mcg tablets.How many tablets will you administer?

A) 2 tablets
B) 1.5 tablets
C) 1 tablet
D) 0.5 tablet

Question 13

Which unit of measure in the metric system is used to determine liquid volume?

A) Meter
B) Liter
C) Gram
D) Grain

Question 14

Match the set of examples to the definition of a numerator.

A) 13.14, 33.58, 21.92
B) 2:5, 1:4, 5:8
C) The 1 in 1/4, 4 in 4/11, 5 in 5/25
D) All of these are correct.

Question 15

Select the correct number of drops per minute to be administered for a 1200-ml IV given over 5 hours using an administration set labeled 10 drops per ml.

A) 400 drops/minute
B) 240 drops/minute
C) 40 drops/minute
D) 4 drops/minute

Question 16

Identify the term that refers to the liquid portion of a solution that is capable of dissolving another substance?

A) Solute
B) Solution
C) Solvent
D) None of these are correct.

Question 17

An example of a weight in volume (W/V) solution would contain:

A) A given weight of drug in a definite weight of solvent so that the final solution is 100 parts by weight
B) A definite volume of solute added to enough water so that the final solution is 100 parts by volume
C) A given weight of solute in enough solvent so that the final solution contains 100 parts by volume
D) None of these are correct.

Question 18

Use a recommended dose of 10 mcg/kg to calculate the loading dose of digoxin for a patient weighing 143 pounds.

A) 600 mcg
B) 625 mcg
C) 650 mcg
D) 675 mcg

Question 19

Use metric system equivalents to select the term that is equal to 3 grams.

A) 3000 milligrams
B) 5 grains
C) 0.003 kilograms
D) All of these are correct.

Question 20

Use Clark's rule to determine the necessary dose of a drug routinely ordered for adults as 300 mg.The child is 5 years old and weighs 40 pounds.

A) 50 mg
B) 60 mg
C) 70 mg
D) 80 mg

Question 21

Select the volume that you will need to add to a 50-ml IV bag in order to administer 15 mg of famotidine (Pepcid) to a patient.The Pepcid is supplied as 1 gram,which will be mixed in enough water to make 100 ml of final solution (W/V).

A) 1.2 ml
B) 1.5 ml
C) 1.6 ml
D) 1.8 ml

Question 22

Select the volume that you will need to add to a 100-ml IV bag in order to administer 100 mg of ampicillin intravenously to the patient.The ampicillin is supplied as 1 gram powder for injection,which will be mixed in enough water to make 10 ml of final solution (W/V).

A) 1 ml
B) 1.2 ml
C) 1.6 ml
D) 0.1 ml

Question 23

Select the volume needed to dispense 500 mg of vancomycin in 500 ml of D5W.The IV is to be administered over 2 hours.Vancomycin is available as 5 grams,which will be mixed in enough water to make 100 ml of final solution (W/V).

A) 10 ml
B) 15 ml
C) 20 ml
D) 25 ml

Question 24

Select the correct volume of the drug required to administer a dosage of 8 mg/kg for a patient who weighs 66 lbs and is 10 years old.The drug is available as a 2-gram,which will be mixed in enough water to make 100 ml of final solution (W/V).

A) 12 ml
B) 20 ml
C) 37 ml
D) 42 ml

Question 25

Select the correct dose of a drug to be administered at a dosage of 10 mg/kg for a patient who weighs 44 pounds and is 6 years old.The drug is available as a 500-mg,which will be mixed in enough water to make 100 ml of final solution (W/V).

A) 125 mg
B) 200 mg
C) 375 mg
D) 425 mg

Question 26

A stock bottle of liquid medication contains 8 ounces.The bottle was opened on Monday and patient A received 4 doses of 1 teaspoon,patient B received 2 doses of 1 tablespoon,and patient C received 2 doses of 1½ teaspoons.Select the correct volume that remains in the stock bottle of liquid medication.

A) 150 ml
B) 200 ml
C) 175 ml
D) None of these are correct.

Question 27

Select the volume that will have to be added to an IV bag in order to administer a recommended dose of 2 mg/kg of a drug that is supplied as 2 gram,which will be mixed in enough water to make 100 ml of final solution (W/V).The patient weighs 220 pounds.

A) 25 ml
B) 40 ml
C) 10 ml
D) 50 ml

Question 28

You receive an order for a loading dose of phenobarbital 5 mg/min to run in over 2.5 hours intravenously for your patient.The total IV volume in the bag is 250 ml.Using 15 drops per milliliter,select the correct number of drops per minute that will be administered to the patient.

A) 25.5 drops/minute
B) 50.5 drops/minute
C) 40.5 drops/minute
D) None of these are correct.

Question 29

Select the volume that will be administered to the patient in order for the patient to receive 90 mg of meperidine (Demerol).The Demerol is to be administered intramuscularly (IM).Demerol is supplied as a 5 percent solution (W/V).

A) 1.2 ml
B) 1.4 ml
C) 1.6 ml
D) 1.8 ml

Question 30

Select the correct volume of the drug required to administer a dosage of 5 mg/kg for a patient who weighs 88 pounds and is 12 years old.The drug is available as a 1-g,which will be mixed in enough water to make 100 ml of final solution (W/V).

A) 12 ml
B) 20 ml
C) 37 ml
D) 42 ml