Chapter 6 Flashcards
What is a conversion factor?
A ratio used to change one unit to another without changing the value of the original measurement.
How many milliliters (mL) are in 1 teaspoon (tsp)?
1 tsp = 5 mL.
How many milliliters (mL) are in 1 tablespoon (Tbsp)?
1 Tbsp = 15 mL.
How many milliliters (mL) are in 1 ounce (oz)?
1 oz = 30 mL.
How many milliliters (mL) are in 1 cup (c)?
1 cup = 240 mL.
How many milliliters (mL) are in 1 pint (pt)?
1 pint = 480 mL.
How many milliliters (mL) are in 1 quart (qt)?
1 quart = 960 mL.
How many milliliters (mL) are in 1 gallon (gal)?
1 gallon = 3,840 mL.
How many grams (g) are in 1 kilogram (kg)?
1 kg = 1,000 g.
How many milligrams (mg) are in 1 gram (g)?
1 g = 1,000 mg.
How many micrograms (mcg) are in 1 milligram (mg)?
1 mg = 1,000 mcg.
Convert 1 pound (lb) to grams (g).
1 lb = 454 g.
Convert 2.2 pounds (lb) to kilograms (kg).
2.2 lb = 1 kg.
How many centimeters (cm) are in 1 inch (in)?
1 inch = 2.54 cm.
What is Dimensional Analysis (DA)?
A method used to convert between units by setting up fractions that cancel out unwanted units.
What is Ratio and Proportion (R&P)?
A method where two ratios are set equal to each other, and you solve for the unknown using cross-multiplication.
What is the main advantage of using Dimensional Analysis (DA)?
DA can be used for both single-step and multistep conversions and helps keep track of units.
Convert 10 mL to teaspoons (tsp) using Dimensional Analysis (DA).
1 tsp = 5ml / 10ml = 2 tsp
Convert 30 mL to tablespoons (Tbsp).
30 mL = 2 Tbsp.
Convert 240 mL to cups (c).
240 mL = 1 cup.
How many milliliters (mL) are in 8 ounces (oz)?
8 oz = 240 mL.
What is the conversion factor between pounds (lb) and kilograms (kg)?
2.2 lb = 1 kg.
How many grains (gr) are in 1 gram (g)?
1 gr = 60-65 mg (depending on medication).
How many grains (gr) of aspirin equal 325 mg?
325 mg ≈ 5 gr.
Convert 1 minim to drops (gtt).
1 minim ≈ 1 drop (gtt).
How many fluid drams (ʒ) are in 1 fluid ounce (fl oz) in the apothecary system?
1 fl oz = 8 fluid drams (ʒ).
Convert 1 pound (lb) to grams (g) using the apothecary system.
1 lb (apothecary) = 373 g.
How many milligrams (mg) are in 1 grain (gr) of codeine?
1 gr = 60 mg of codeine.
Convert 1 fluid ounce (fl oz) to tablespoons (Tbsp).
1 fl oz = 2 Tbsp.
Convert 3 teaspoons (tsp) to milliliters (mL).
3 tsp = 15 mL.
Convert 1 ounce (oz) to grams (g) using the household system.
1 oz = 30 g.
Convert 5 feet to centimeters (cm).
5 feet = 152.4 cm.
What is a measurable amount?
The quantity of medication that can be accurately measured using the available device.
Why are conversions between systems approximations?
Differences between systems, medication viscosity, and the size of the device used for dosing create approximations.
How many minims are in 1 drop (gtt)?
1 minim ≈ 1 drop (gtt).
How many milliliters (mL) are in 1 fluid dram (ʒ)?
1 fluid dram = 3.7-5 mL (varies).
What is the conversion factor between grains (gr) and milligrams (mg) for aspirin?
1 gr = 65 mg for aspirin.