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HS140: Pharmacology
Chapter 7: Measurement Systems & their Equivalents
| Term | Definition |
|---|---|
| Apothecary | pharmacist or druggist |
| Apothecary system | one of the oldest measurement systems used to calculate drug orders; based on grains and drams |
| Dram | Unit of measure for liquid volume in the apothecary system |
| Grain | Basic unit of measure for solid weight in the apothecary system; compared with one grain of wheat or rice |
| Gram | Basic unit of measure for solid weight in the metric system |
| Household system | System of measurement that uses common kitchen measuring devices |
| Liter | Basic measurement unit of volume (liquid or gas) in the metric system |
| Meter | Basic measurement unit of length in the metric system |
| Metric system | Measurement system based on powers of 10, considered to be the international standard for scientific and industrial measurements; uses grams, liters, meters |
| Milliequivalent | Weight of a drug (usually in milligrams) in a volume (usually liters) of solution |
| Minim | Smallest unit of volume (liquid) in the apothecary system; approximately a drop in household measure |
| Unit | Basic quantity used when calculating desired dosages to indicate the strength of a particular medication; the unit is unique for each drug, based on the drug's strength in a basic measurement system (e.g. grain, gram, milligram) |
| Metric system is also known as | SI "Systeme International" or English measurement system, it is based on the decimal system and is the international standard for scientific and industrial measurements. |
| The three basic units of measure "metric system" | Gram, liter and meter |
| In medical applications, wight usually references | mass (such as the weight of a pathology specimen) or a solid (such as the amount of medication in a tablet or solid (such as the amount of medication in a table or capsule of medicine |
| Volume usually references | a liquid or a gas |
| Length reference | distance |
| kilo= | 1000 units |
| hecto= | 100 units |
| deka | 10 units |
| base unit= | meter, gram, liter |
| deci= | 0.1 (tenths of one unit) |
| Centi= | 0.01 hundredths of one unit |
| milli | 0.001 thousandths of one unit |
| Micro= | 0.000001 millionths of one unit |
| Mnemonic memory phrase | Kids Hates Dogs Because Dogs Chase Mailmen "many many" Mailmen |
| meter to millimeter 1 m= | 1000 mm |
| Meter to centimeter 1 m= | 100 cm |
| Centimeter to millimeter 1 cm= | 10 mm |
| When solving a problem, if you are: GIVEN the smaller unit | divide to find the answer |
| When solving a problem, if you are: GIVEN the larger unit | multiply to find the anser |
| The basic unit of volume in the metric system is | liter |
| Liter to milliliter 1 L= | 1000 mL |
| The base unit used to measure weight (mass) in the metric system is the | gram |
| kilogram to gram 1 kg= | 1000 g |
| Gram to milligram 1 g= | 1000 mg |
| Milligram to microgram 1 mg= | 1000 mcg |
| Liquid volume 60 minims = | 1 fluid dram (f3) |
| Solid weight 60 grains = | 1 dram |
| Liquid volume 8 fluid drams (f3 viii)= | 1 fluid once (f3i) |
| The apothecary basic unit of measure for solid weight is the | grain (gr) 1 grain = approximately the weight of 1 grain of wheat or rice |
| The household measuring system is called | US Customary System of Measurement |
| 1 pound (lb) is | 16 oz |
| 1 teaspoon | 60-75 gtts (drops) |
| 1 tablespoon (T) | 3 t |
| 1 ounce | 2 T |
| 1 cup | 8 oz |
| 1 pint | 2 c; 16 oz |
| 1 quart | 2 pt; 4 c; 32 oz |
| 1 gallon | 4 qt; 8 pt; 16 c; 128 oz |
| 1 foot | 12 in |
| 1 yard | 3 ft; 36 in |
| Milliequivalent aka mEq/L or mEq/mL, mEq/tab,or mEq/cap | pertains to the amount of a solute contained in a solution |
Created by:
adlb2014