Calculations

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Match the terms

body surface area = a measure for dosage calculated from the height and weight of a person and measured in square meters concentration = the strength if a solution as measured by its weight to volume or volume to volume denominator = the bottom (or right) number in a fraction; it indicates how many parts the whole is divided into drip rate = the measurement for IV flow rate; the number of drops per minute

Match the terms

conversions = the change from one unit of measure to another so that both amounts are equal flow rate = the rate ( in mL/hour or mL/min) at which a solution is administered; also known as rate of administration least common denominator = smallest possible denominator for an equivalent fraction so that two fractions can be added or subtracted an have the same denominator milliequivalent (mEq) = the unit of measure for electrolytes in a solution

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nomogram = a chart showing relationships between measurements numerator = the top (or left) number in a fraction; it indicates how many parts of the whole exist positional notation = a system used in Roman numerals whereby the position of a numeral signifies its value qs ad = adding a sufficient quantity of an ingredient to make the prescribed amount

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reciprocal = two different fractions that equal 1 when multiplied together total parenteral nutrition = administration of all nutrients intravenously; also known as hyperalimentation valence = the number of positive or negative charges on an ion variable = an unknown value in a mathematical equation Signup and view all the answers

The doctor ordered 1/2 gr codeine. How many milligrams is this equivalent to?

32.4 mg Signup and view all the answers

If the temperature in the refrigerator is 45 degrees F, to the nearest whole degree, what is the temperature in Celsius

7 Signup and view all the answers

A solution of haloperidol contains 2 mg/mL of active ingredient. How many grams would be in 240 mL of this solution?

0.48 g Signup and view all the answers

The physician orders ferrous sulfate 300 mg po qd. You have on the shelf ferrous sulfate 220 mg/5 mL. How many mL are required for one dose?

6.8 mL Signup and view all the answers

Using the information in question before, approximately how many mL are required to fill a 30 day supply?

205 mL Signup and view all the answers

What volume of a 25 mg/mL solution is needed to deliver a 20 mg dose?

0.8 mL Signup and view all the answers

A patient is taking 2 teaspoonfuls of sucralfate suspension four times a day. How much suspension will the patient use in 72 hours?

4 oz Signup and view all the answers

Phos-Flur rinse contains sodium fluoride 0.044% (w/v). How many mg of sodium fluoride are in a 10 mL dose?

4.4 mg Signup and view all the answers

If 0.44 mg of sodium fluoride is equal to 0.2 mg of fluoride, how many mg of fluoride are in 2.2 mg of sodium fluoride?

1 mg Signup and view all the answers

You have an ampule of digoxin injection that contains 500 mcg in 2 mL. What volume is needed to deliver a dose of 0.125 mg?

0.5 mL Signup and view all the answers

The doctor changes a prescription for 150 mL of amoxicillin 250 mg/5 mL to 250 mg chewable tablets. How many chewable tablets should be dispensed?

30 tablets Signup and view all the answers

If the dose of a drug is 500 mg and the drug is available as 400 mg/5 mL, how many teaspoonfuls are needed for the required dose?

1.25 teaspoonfuls Signup and view all the answers

How many tablets should be dispensed if a prescription is written as follows: Tabs iss b.i.d for 10 days

30 tablets Signup and view all the answers

How many ounces of medication is needed to last eight days if the dose of medication is one and one-half teaspoonfuls four times a day?

8 oz Signup and view all the answers

How many 4 oz bottles can be filled from a gallon of Coke Syrup?

32 bottles Signup and view all the answers

Oral polio virus vaccine should be stored in a temperature not to exceed 46 F. What is the temperature in Celsius?

7.8 C Signup and view all the answers

A prescription reads for erythromycin 100 mg every six hours for 10 days. You have on hand erythromycin 250 mg/5 mL. How much erythromycin is needed for one dose?

2 mL Signup and view all the answers

You have an IV that needs MgSO4 10 mEq. You have on hand a bottle of MgSO4 4 mEq/mL. How much MgSO4 do you need to inject into the IV bag?

2.5 mL Signup and view all the answers

You have an order for 20% dextrose 500 mL. You have a 1000 mL bag of dextrose 70%. How much of the dextrose 70% do you need to use to make dextrose 20 % 500 mL? How much sterile water do you need?

143 mL and 357 mL Signup and view all the answers

How much hydrocortisone powder is needed to compound 60 g of hydrocortisone cream 1%?

600 mg Signup and view all the answers

An IV contains 5 mg of drug per mL and the patient needs to receive 50 mg per hour. What is the infusion rate in mL/hr?

10 mL/hr Signup and view all the answers

The infusion rate pf an IV is over 12 hours. The total volume is 1000 mL. What would the infusion rate be in mL per minute?

1.4 mL/min Signup and view all the answers

How many mL of 70% alcohol should be mixed with 20% alcohol to prepare 50mL of 50% alcohol?

30 mL Signup and view all the answers

A child's dose for cefadroxil is 30 mg/kg body weight once a day for 14 days. What is the smallest bottle that will provide enough medication to last 14 days if the child weighs 44 pounds?

100 mL bottle of 500 mg/5 mL Signup and view all the answers

Calculations - CH 6

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Questions and Answers

Match the terms

Match the terms

Match the terms

Match the terms

The doctor ordered 1/2 gr codeine. How many milligrams is this equivalent to?

If the temperature in the refrigerator is 45 degrees F, to the nearest whole degree, what is the temperature in Celsius

A solution of haloperidol contains 2 mg/mL of active ingredient. How many grams would be in 240 mL of this solution?

The physician orders ferrous sulfate 300 mg po qd. You have on the shelf ferrous sulfate 220 mg/5 mL. How many mL are required for one dose?

Using the information in question before, approximately how many mL are required to fill a 30 day supply?

What volume of a 25 mg/mL solution is needed to deliver a 20 mg dose?

A patient is taking 2 teaspoonfuls of sucralfate suspension four times a day. How much suspension will the patient use in 72 hours?

Phos-Flur rinse contains sodium fluoride 0.044% (w/v). How many mg of sodium fluoride are in a 10 mL dose?

If 0.44 mg of sodium fluoride is equal to 0.2 mg of fluoride, how many mg of fluoride are in 2.2 mg of sodium fluoride?

You have an ampule of digoxin injection that contains 500 mcg in 2 mL. What volume is needed to deliver a dose of 0.125 mg?

The doctor changes a prescription for 150 mL of amoxicillin 250 mg/5 mL to 250 mg chewable tablets. How many chewable tablets should be dispensed?

If the dose of a drug is 500 mg and the drug is available as 400 mg/5 mL, how many teaspoonfuls are needed for the required dose?

How many tablets should be dispensed if a prescription is written as follows: Tabs iss b.i.d for 10 days

How many ounces of medication is needed to last eight days if the dose of medication is one and one-half teaspoonfuls four times a day?

How many 4 oz bottles can be filled from a gallon of Coke Syrup?

Oral polio virus vaccine should be stored in a temperature not to exceed 46 F. What is the temperature in Celsius?

A prescription reads for erythromycin 100 mg every six hours for 10 days. You have on hand erythromycin 250 mg/5 mL. How much erythromycin is needed for one dose?

You have an IV that needs MgSO4 10 mEq. You have on hand a bottle of MgSO4 4 mEq/mL. How much MgSO4 do you need to inject into the IV bag?

You have an order for 20% dextrose 500 mL. You have a 1000 mL bag of dextrose 70%. How much of the dextrose 70% do you need to use to make dextrose 20 % 500 mL? How much sterile water do you need?

How much hydrocortisone powder is needed to compound 60 g of hydrocortisone cream 1%?

An IV contains 5 mg of drug per mL and the patient needs to receive 50 mg per hour. What is the infusion rate in mL/hr?

The infusion rate pf an IV is over 12 hours. The total volume is 1000 mL. What would the infusion rate be in mL per minute?

How many mL of 70% alcohol should be mixed with 20% alcohol to prepare 50mL of 50% alcohol?

A child's dose for cefadroxil is 30 mg/kg body weight once a day for 14 days. What is the smallest bottle that will provide enough medication to last 14 days if the child weighs 44 pounds?

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