Question 1

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

Accepted Answer

Fractions whose values are equal to or greater than 1 (the numerator is equal to or greater than the denominator) are called improper fractions.

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.

Accepted Answer

Step 1: Determine the total number of drops. Total number of drops = 10 drops/ml F1F1F1S1F1F1F10 1200 ml = 12000 drops. Step 2: Divide the total number of drops by the total number of minutes to find the number of drops per minute. The number of drops per minute = 12000 drops / (5 F1F1F1S1F1F1F10 60) minute = 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.

Accepted Answer

Clark's rule: weight of child /150 lb F1F1F1S1F1F1F10 adult dose = child's dose. 40 lb/150 lb F1F1F1S1F1F1F10 300 mg = 80 mg.

Question 4

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

Accepted Answer

A solution is a homogeneous mixture of two or more substances. The liquid portion of the solution is known as the solvent, and the substance dissolved within the solvent is the solute.

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.

Accepted Answer

Step 1: Determine the total number of drops. Total number of drops = 15 drops/ml F1F1F1S1F1F1F10 500 ml = 7500 drops. Step 2: Divide the total number of drops by the total number of minutes to find the number of drops per minute. The number of drops per minute = 7500 drops / (2 F1F1F1S1F1F1F10 60) minute = 62.5 drops/min.

Question 6

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

Accepted Answer

The IV drug infusion solutions must be prepared under aseptic conditions, the drugs and solutions mixed must be chemically compatible, and often the infusion solution must be adjusted to a specific pH value.

Question 7

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

Accepted Answer

The units of measure for the metric system are meter (length), gram (weight), and liter (volume).

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.

Accepted Answer

Step 1: Determine the dosage. 10 mg/ml = 50 mg/X; 10X = 50 mg; X = 50 mg/10 mg per ml; X= 5 ml. Step 2: Determine the number of teaspoons that should be administered to deliver a dosage of 5 ml. 1 teaspoonful = 5 ml.

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.

Accepted Answer

Fried's rule: age in months/150 F1F1F1S1F1F1F10 average adult dose = child's dose. 42/150 F1F1F1S1F1F1F10 10 ml = 2.8 ml.

Question 10

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

Accepted Answer

Drug dosages are sometimes administered on a body weight basis, for example, in mg/kg. This may require conversion of pounds to kilograms (1 kg = 2.2 lb).

Question 11

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

Accepted Answer

Ratio is the relationship of one number to another expressed by whole numbers (1:5) or as a fraction (1/5).

Question 12

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

Accepted Answer

Step 1: Convert pounds to kilograms. 143 lb/2.2 lb/kg = 65 kg. Step 2: Determine how many micrograms are required. 10 mcg/kg F1F1F1S1F1F1F10 65 kg = 650 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?

Accepted Answer

Step 1: Determine the number of tablets needed by setting up a fraction based on desired dosage/available dosage. 60 mg/30 mg (1 tablet) = 2 tablets.

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.

Accepted Answer

The first step is to convert the weight in pounds to kilograms. 1 kg:2.2 lb = X:55 lb. Solving for X, X = 25 kg. The next step is to determine how many milligrams of drug are required. The amount of drug required = 15 mg/kg F1F1F1S1F1F1F10 25 kg = 375 mg.

Question 15

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

Accepted Answer

A fraction is composed of two numbers, a numerator and a denominator. The numerator is the top number of a fraction. It indicates how many parts are being referred to.

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?

Accepted Answer

Step 1: Convert 0.25 mg to mcg using metric conversion. 0.25 mg F1F1F1S1F1F1F10 1000 = 250 mcg. Step 2: Determine the number of tablets needed by setting up a fraction based on desired dosage/available dosage. 250 mcg/250 mcg (1 tablet) = 1 tablet.

Question 17

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

Accepted Answer

Weight conversion measures: 1 kilogram (kg) = 1000 grams (g); 1 gram (g) = 1000 milligrams (mg); 1 milligram (mg) = 1000 micrograms (mcg); 1 grain (gr, apothecary system) = 60.0 mg.

Question 18

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

Accepted Answer

Approximate household measures: 60 drops (gtt) = 1 teaspoon (tsp); 1 teaspoonful (tsp) = approximately 5.0 ml; 1 tablespoonful (tbsp) = approximately 15.0 ml; 2 tablespoons (tbsp) = approximately 1 fluid ounce (oz); 1 measuring cup = approximately 8 fluid ounces (oz).

Question 19

A sample of a weight in volume (W/V)solution would contain:

Accepted Answer

Weight in volume solutions contain a given weight of solute (drugs, salts) in enough solvent so that the final solution contains 100 parts by volume.

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.

Accepted Answer

Step 1: Calculate the total number of teaspoons administered in one day. 2 tsp F1F1F1S1F1F1F10 4 = 8 tsp daily. Step 2: Multiply the number of teaspoons per day by number of milliliters per teaspoon. 8 tsp F1F1F1S1F1F1F10 5 ml/tsp = 40 ml.

Quiz 4: Math Review and Dosage Calculations