1. Introduction to Medical Math

2. Identify Components of the Household System of Measurement.
Less accurate system of measurement
Primarily used by patient who take medications at home. Practitioners responsibility to assure consumer is taking the correct dose
Necessary for practitioners to know equivalents from “pharmacy language” to every day common household terms

3. Conversions
Conversion factors are needed in order to change one unit to another unit.
Household measurement can be converted into metric units. Remember household measurement is everything you use normally such as feet, inches, yard, pound, ounce, cup, etc….
Metric measurement is anything that deals with gram, liter, or meter. Hint: King Henry acronym - KHD (GML) DCM

4. Conversion Examples Household to Metric
Standard teaspoon = 4-5 ml
1 tbsp = 15 ml
1 cup = 30ml
60 gtt. = 5 ml
3 teaspoon = 15 ml

5. English Measurements Inches, yards Length
Cups, Pints, Quarts, gallons Volume
Pounds, ounces Weight

6. Conversion Examples Metric to Household
1 kg = 2.22 lbs
2.54 cm = 1 in.
1 L = 1 qt
240 ml = 8 oz

7. Test Your Gray Matter
Which of the following is a unit in the household system of measurement? tbl, cm, ml, or mg
Which of the following healthcare workers would most likely use the metric system in their daily routine? Housekeeping, Pharmacist, Admission Clerk or Marketing Director.

8. Metric System
About 1670 a Frenchman developed a system of measurement organized according to the decimal system.
It has been adopted in every other country except the USA.
In prescription and administration of drugs, a working knowledge of metrics is important.

9. Metric System
Most commonly used system in measurement , easy to use since based on parts and multiples of 10.
Greek and Latin prefixes indicate what multiple is used : milli-
centi-
deci-
micro-
kilo-etc.

10. Metric
Meter (m) Length
Gram (g or gm) Weight
Liter (L or l) Volume

11. Fun Fact!
A gram of venom from the king Cobra is so deadly that it could kill 150 people.

12. Metric Symbols Meaning Prefix Symbol 1000 units Kilo k
100 units hecto h
10 units deka da
1 unit base unit m / l / g
0.1 unit deci d
0.01 unit centi c
0.001 unit milli m

13. Conversion Factors These items will either be given to you or you
willhave to remember the conversion factor. You
must learn these conversions and be able to recall
them from your memory.
Examples:
1 inch (in) = 2.5 centimeters (cm)
1 meter (m) = 39.4 inches (in)
1 kilogram (kg) = 2.2 pounds (lb)

14. Setup for Conversion problem
Convert 154 pounds to
Kilograms.
Conversion factor =
2.2lbs = 1kg
Step 1: 154 times 1 = 154
Step 2: 154 divided by 2.2
Step 3: 6.8 kgs
The answer is in kgs because lbs
cancel out.
154 lbs
1kg
2.2 lbs

15. Practice Items use conversion chart
196 pounds = ________kg
157 pounds = ________kg
61 kilograms = ________ lb
1.8 m = ________in
157.5 cm = ________in
72 in = ________cm
5’11” = ________cm

16. Test your Gray Matter!
Which of the following metric prefixes means that the measurement is smaller than the base unit? Milli, Hecto, Kilo, or Deka
The metric unit that measures weight or mass is: Gram, Meter, Liter, or Pint
Mr. Shuback walked 22 meters down the hall with his walker. He asked you how many feet he accomplished? What would you tell him? 42, 54, 68, or 72

17. Which of the following is NOT a measure in the household system
Which of the following is NOT a measure in the household system? Milliliter, Ounce, Gallon, or Teaspoon
The system of measurement based on multiples of 10 is known as: The household system, The conversion system, The metric system, or The algebraic system
The appropriate abbreviation for the metric term “kilogram” is: k, kg, kgm, or kilogr
David was measured to be 6ft. 2 in. tall. How many centimeters tall is he? 74 cm, 148 cm, 188cm, or 222cm

18. All of the following are metric units EXCEPT: Meter, Liter, Quart, or Gram
A man weighs 172 lbs. What is his weight in kgs? 100 kg, 81 kg, 78.2 kg or 60 kg
How many kg equal to 1350 mg? .1350, 1.350, 13.50, or 135.0

19. Fahrenheit and Celsius Temperature Conversion
Convert 32 oF (freezing point of water) to degrees Celsius
C = F- 32
1.8
Step One 32-32
Answer : 00 = C

20. Follow a two-step procedure to convert Celsius to Fahrenheit
Multiply 1.8 times degrees Celsius
Add 32.
Convert 200 C to degrees Fahrenheit
F = (1.8)(20) + 32 = 680 F

21. Practice
26.50 C ______ 0F
410 C ______0F
00 F ______0C
350 F ______0C

22. Test Your Gray Matter!
A patient is admitted to ICU with a rectal temperature of 104 degrees F. What would his temperature be in Celsius? 39 degrees C, 40 degrees C, 40.5 degrees C, or 41.5 degrees C.
The freezing point of water on the Celsius scale is : 32 degrees, 212 degrees, 100 degrees, or 0 degrees
Normal Body temperature is 98.6 degrees F, What is this in Celsius? 35 degrees, 36 degrees, 37 degrees, or 38 degrees

23. Karen has a temperature of 102. 8 degrees F. What is this in Celsius
Karen has a temperature of degrees F. What is this in Celsius? 37.8, 38.5, 39.3, or 40.1
A patient has a temperature of 101 degrees F. What is it in Celsius? 36.5, 38.3, 39, or 40.2

24. Roman Numerals One I Twenty XX Two II Thirty XXX Three III Fifty L
Four IV One hundred C
Five V
Six VI
Seven VII
Eight VIII
Nine IX
Ten X

25. Volume Equivalent 30cc (ml) = one ounce One drop(gtt) = 15 cc (ml)
5 cc (ml) = one teaspoon
15 cc (ml) = one tablespoon
One pint = 500cc
One quart = 1,000cc
One Kiloliter = 1,000cc

26. Test Your Gray Matter!
Mrs. Smith drank 240 cc of milk, 75cc of orange juice, and 120cc of coffee. How much did Mrs. Smith drink in all? 335cc, 325cc, 425cc, or 435cc
Jamie, a 2 month old, was given 75cc of Amoxil a day for 10 days for an ear infection. How many ounces did the pharmacist dispense? 2, 3, 4, or 5
The physician ordered Keflex 1 gm IV q8hrs. How many mgs would the patient receive in 24 hours? 1000 mg, 2000 mg, 3000 mg, or 4000 mg

27. Kim drank 1 pint of orange juice. How many cc’s did she drink
Kim drank 1 pint of orange juice. How many cc’s did she drink? 500cc, 400cc, 300cc, or 200cc
Blanco’s IV intake was 2500cc. How many Liters is this? 1.5 liters, 2 liters, 2.5 liters, 3 liters
Mary voided 240cc urine. How many ounces did she void? 5 oz, 6 oz, 8 oz, 9 oz

28. The patient drank ½ of a 12 oz drink. How many cc is this
The patient drank ½ of a 12 oz drink. How many cc is this? 150cc, 180cc, 210cc or 240cc
How many ounces are in three cups? 18 oz, 24 oz, 30 oz, or 36 oz.
Which of the following is equal to 3 liters? 6 quarts, 10 pints, 1000 ml, or 3000cc

29. How many cc’s are there in 3 tsp? 5 cc, 10 cc, 15cc, or 20cc
How many gtts are in 5 mls? 25, 50, 75, or 100
Which of the following is NOT equal to 1 Liter? 1 qt, 2 pt, 8 cups, or 1000cc

30. Let the fun begin.