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Dimensional Analysis. Chapter 5. Units. Measures the drug in terms of action No symbol for units. Sample problems - Answers. Express the unit dosage in numerals and symbols: Three hundred and fifty thousand units. 350,000 units Twenty-five hundred units. 25,000 units Sixty units.

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units
Units
  • Measures the drug in terms of action
  • No symbol for units
sample problems answers
Sample problems - Answers
  • Express the unit dosage in numerals and symbols:
  • Three hundred and fifty thousand units.
    • 350,000 units
  • Twenty-five hundred units.
    • 25,000 units
  • Sixty units.
    • 60 units
percentage measures
Percentage (%) measures
  • Percentage means parts per hundred.
  • No space between the # and the %
    • 1% not 1 %
  • The greater the percentage strength, the stronger the solution or ointment.
sample question
Sample Question
  • Which is stronger, a 3% solution or a 6% solution?
    • 3%
    • 6%
which of the following is the correct abbreviation for units
Which of the following is the correct abbreviation for “units”?
  • Un
  • U
  • UN
  • Ut
  • None of the above
percentage measures1
Percentage (%) measures
  • In solution, percent represents the number of grams of drug per 100 mL of solution.
    • 100 mL of a 1% solution will contain 1 g of drug
sample questions
Sample Questions
  • 100 mL of a 1% solution will contain how many grams of drug?
    • 1 g
  • 100 mL of a 2.5% solution will contain how many grams of drug?
    • 2.5 g
  • 100 mL of a 10% solution will contain how many grams of drug?
    • 10 g
convert to fraction
Convert % to fraction
  • To change percentage to fraction by 100
    • 5% =
what is the fraction of 60
What is the fraction of 60%
  • 60
  • 6
  • 0.6
  • 0.06
  • None of the above
120 ml of a 5 4 solution will contain how many grams of drug
120 mL of a 5.4% solution will contain how many grams of drug?
  • 6.45 g
  • 64.5 g
  • 645 g
  • None of the above
  • I’m so lost I have no idea!
milliequivalent meq measures
Milliequivalent (mEq) measures
  • Number of grams of drug contained in 1 mL of a solution
  • Who cares?
    • Not you
  • What do I need to know
    • -mEq = milliequivalent
sample questions1
Sample Questions:
  • Express the milliequivalent dosages in numbers and symbols:
  • Fifteen milliequivalents
    • 15 mEq
  • Twenty-five milliequivalents
    • 25 mEq
  • Forty-two milliequivalents
    • 42 mEq
ratio measures
Ratio Measures
  • Parts of drug per parts of solution
  • 1:500
    • 1 part drug to 500 parts solution
  • 1:20
    • 1 part drug to 20 parts solution
  • A solution that is 1 part drug and 10 parts solution is written:
    • 1:10
slide22

If I take 1 bottle of alcohol & add it to 2 bottles of soda

    • 1:2 ratio
    • How drunk would one glass of this spiked punch make you?
slide23

If I take 1 bottle of alcohol & add it to 5 bottles of soda

    • 1:5 ratio
    • How drunk would one glass of this spiked punch make you?
    • Which would make you more drunk 1:2 or 1:5?
ratio measures1
Ratio Measures
  • The less solution a drug is dissolved in, the stronger the solution.
    • A ratio of 1:2 is much stronger than 1:5
    • A ration of 1:5 is much stronger than a 1:500
identify the strongest solution
Identify the strongest solution:
  • A) 1:20
  • B) 1:200
  • C) 1:2
identify the strongest solution1
Identify the strongest solution:
  • A) 1:50
  • B) 1:20
  • C) 1:100
identify the strongest solution2
Identify the strongest solution:
  • A) 1:1000
  • B) 1:4000
  • C) 1:3000
household apothecary measures
Household & Apothecary measures
  • Ounce
  • Abbreviation: oz
household apothecary measures1
Household & Apothecary measures
  • Ounce
  • Metric equivalent: 30 mL
    • 1 oz = 30 mL
  • How many milliliters in 3 oz?
    • 90 mL
    • mL
household apothecary measures2
Household & Apothecary measures
  • Tablespoon
  • Abbreviation: T, TBS, Tbsp
  • Metric equivalent: 15 mL
    • 1 Tbsp.= 15 mL
  • How many milliliters in 3 Tbsp?
    • 45 mL (3 x 15 = 45)
    • = 45mL
household apothecary measures3
Household & Apothecary measures
  • Teaspoon
  • Abbreviation: t, TSP, tsp
  • Metric equivalent: 5 mL
    • So 1 tsp = 5 mL
  • How many milliliters in 3 tsp?
    • 15 mL (3 tsp x 5 mL = 15 mL)
household apothecary measures4
Household & Apothecary measures
  • Drop
  • Abbreviation: gtt (gtts)
  • Metric equivalent: 1 mL
    • So 1 gtt = 1 mL
  • How many milliliters in 3 gtts?
    • 3 mL (3 x 1 = 3)
household apothecary measures5
Household & Apothecary measures
  • Grain
  • Abbreviation: gr
  • Metric equivalent: 60 mg
    • 1 gr = 60 mg
  • How many milligrams in 3 gr?
    • 180 mg (3 x 60 = 180)
  • (For grains see page 306 of your text book)
how many ml in 5 teaspoons
How many mL in 5 teaspoons?
  • 5 mL
  • 10 mL
  • 15 mL
  • 25 mL
  • None of the above
how many ml in 25 drops
How many mL in 25 drops?
  • 25 mL
  • 50 mL
  • 75 mL
  • 100 mL
  • None of the above
the doctor says to give 2 oz but you only have a ml cup how much do you give in ml
The doctor says to give 2 oz, but you only have a mL cup. How much do you give in mL?
  • 2 mL
  • 15 mL
  • 30 mL
  • 60 mL
  • None of the above
how many milligrams in 3 grains
How many milligrams in 3 grains?
  • 50 mg
  • 100 mg
  • 150 mg
  • 200 mg
  • None of the above
how many milliliters in 1 tablespoon
How many milliliters in 1 tablespoon?
  • 5 mL
  • 10 mL
  • 15 mL
  • 25 mL
  • None of the above
2 8 ml of a 5 7 solution will contain how many grams of drug round to the nearest tenth
2.8 mL of a 5.7% solution will contain how many grams of drug? (Round to the nearest tenth)
  • 2.8 g
  • 5.7 g
  • 0.1 g
  • 0.2 g
  • None of the above
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