Deck 4: Math Review and Dosage Calculations

Question 1

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

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

Answer 1

5/5

Question 2

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/min
B) 240 drops/min
C) 40 drops/min
D) 4 drops/min

Answer 2

40 drops/min

Question 3

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

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

Answer 3

80 mg

Question 4

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

A) Solute
B) Plasma
C) Solvent
D) None of these

Question 5

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/min
B) 62.5 drops/min
C) 40 drops/min
D) 75 drops/min

Question 6

While summarizing the factors that affect IV solutions,it can be concluded that:

A) IV drug solutions must be free of contamination.
B) IV drug solutions must constitute drugs and solutions that are chemically compatible.
C) IV drug solutions must be adjusted to a targeted pH range.
D) all of these are correct.

Question 7

Which of the following units in the metric system is used to measure liquid volume?

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

Question 8

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

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

Question 9

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

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

Question 10

You are reviewing dosage calculations with a new employee.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.

Question 11

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

Question 12

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 13

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 should you administer?

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

Question 14

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

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

Question 15

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

A) The 13 in 13.14, 33 in 33.58, and 21 in 21.92
B) The 5 in 2:5, 4 in 1:4, and 8 in 5:8
C) The 1 in 1/4, 4 in 4/11, and 5 in 5/25
D) All of these

Question 16

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 17

Use metric system equivalents to select the quantity equal to 3 g.

A) 3000 mg
B) 50 grains
C) 0.003 kg
D) All of these

Question 18

Identify from the following the correct metric conversion value with its corresponding household measure.

A) 10 ml = 1 tablespoonful
B) 5 ml = 1 teaspoonful
C) 1 grain = 60 mg
D) 1500 ml = 1.5 l

Question 19

A sample 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.

Question 20

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 21

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 500 mg in powder form,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 22

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 is left in the stock bottle of liquid medication.

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

Question 23

Melissa is 4 years old and weighs 50 pounds.She is prescribed an antibiotic to treat a throat infection.The regular adult dosage is 200 mg per day.What is the dosage that Melissa should receive?

A) 33 mg
B) 66 mg
C) 99 mg
D) 111 mg

Question 24

Select the correct volume of a 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 tablet,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 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 in powder form 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 26

A physician prescribes 2 teaspoons of a drug per day.The drug is available in a concentration of 2 mg/ml.How many milliliters of the drug should be administered per day?

A) 2 ml
B) 4 ml
C) 5 ml
D) 8 ml

Question 27

A drug order for a patient contains 200 mg of the drug to be administered intravenously over two hours.The concentration of the solution is 2 mg/ml.The administration set is labeled 10 drops per ml.Determine the IV infusion rate.

A) 6.5 drops per minute
B) 8.3 drops per minute
C) 9 drops per minute
D) 11.3 drops per minute

Question 28

Select the volume of a drug that should be administered to a patient in order for the patient to receive 90 mg of meperidine (Demerol).The meperidine 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 29

Laura visits her physician with complaints of a sore throat.The physician diagnoses an infection and prescribes a syrup to ease the discomfort.The prescribed dosage is 1 tablespoon of syrup,thrice every day.Determine the daily dosage using metric system equivalents.

A) 15 ml
B) 45 ml
C) 50 ml
D) 75 ml

Question 30

You receive an order for a loading dose of phenobarbital 5 mg/min to run intravenously for your patient in over 2.5 hours.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 drops/min
B) 50 drops/min
C) 40 drops/min
D) None of these

Question 31

Select the volume required to dispense 500 mg of vancomycin in 500 ml of D5W (5% dextrose in water).The IV is to be administered over 2 hours.Five grams of vancomycin is 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 32

Select the volume of famotidine solution that you will need to add to a 50-ml IV bag in order to administer 15 mg of famotidine (Pepcid)to a patient.One gram of Pepcid will be mixed in enough water to make 100 ml of the final solution (W/V).rev: 01_31_2015_QC_CS-5906

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

Question 33

A drug order contains 500 mg of a drug to be administered every day.The drug is available as 200-mg tablets.How many tablets should be administered per day?

A) 1 tablet
B) 2 tablets
C) 2.5 tablets
D) 3.5 tablets

Question 34

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 in powder form,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 35

Select the correct volume of a 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 in 2-g tablets,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