Calculations I Flashcards
What are some of the different ways that drugs can be measured?
- Weight [g, mg, kg…]
- Volume [L, mL…]
- Concentrations [% strength, ratio, PPM]
What does 1 Teaspoon equal in Milliliters?
Common Conversion
- 5 mL
What does 1 Tablespoon equal in milliliters?
Common Conversion
- 15 mL
What does 1 fl oz equal in Milliliters?
Common Conversion
- 30 mL
What does 1 cup equal in both Ounces and Milliliters?
Common Conversion
- 8 oz
- 240 mL
What does 1 pint equal in both Ounces and Milliliters?
Common Conversion
- 16 oz
- 480 mL
What does 1 Quart equal in both Pints and Milliliters?
Common Conversion?
- 2 Pints
- 960 mL
What does 1 Gallon equal in both Quarts and Milliliters?
Common Conversion
- 4 Quarts
- 3840 mL
What does 1 Kilogram equal in Pounds?
Common Conversion
- 2.2 Pounds
What does 1 Ounces equal in Grams?
Common Conversion
- 28.4 g
What does 1 Pound equal in both Grams and Ounces?
Common Conversion
- 454 g
- 16 oz
What does 1 grain equal in Milligrams?
Common Conversion
- 65 mg
Example Questions:
A prescription reads: “take 2 tsp PO Q6H x 7 days”. How many milliliters must be dispensed to complete 7 days of therapy?
- 280 mL
Example Question:
If 1 ounces = 30 mL, how many Milliliters of sterile water will remain after 50 mL are used from a 16 ounce bottle?
- 430 mL
What is the most important thing to note about rounding during calculations?
- 5, 6, 7, 8, 9 = ROUND UP
- 0, 1, 2, 3, 4 = ROUND DOWN
Example Question:
A pediatric patient is receiving 5.25 mL of a drug every 4 hours. How many Milliliters will need to be required for the entire day? Round to the nearest whole number.
- 32 mL
Example Questions:
A patient requires 410.9 mg of a drug daily. The daily dose will be divided for BID administration. How many milligrams will the patient receive BID? Round to the nearest whole number?
- 205 mg BID
Example Question:
Enoxaparin 56.5 mg was ordered for a patient. The hospital rounds enoxiparin doese to the nearest 10 mg. What dose should be dispensed?
Why?
- 60 mg
- Rounding the Tenth spot
Example Question:
A patient is 5’2” tall. What is her height in centimeters? Round to the nearest whole number.
- 157 cm
What are Prooptions and what is important to know about setting up the equation?
- Two Fractions that are set equal with one variable having a X in its spot
- The units for the numberator MUST match and the units for the Demonator mUST match [(1 Apple/2 Peach) = (X Apple/5 Peach)]
What are Dimensonal Analysis and what is important to know about setting up this equation?
- What we were taught in school
- 1000 mg x (1g / 1000 mg) x ….
Example Question:
A patient weights 176 pounds. What is the patients wieght in Kilograms
Work it both ways: Proportion and Dimensional Anaylsis
- 80 kg
Example Questions:
How many Milliliters are in 5 liters?
- 5000 mL
Example Question
How many Decliters are equal to 200 Milliliters
- 2 dL