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# CH 13 Pharm Calc

### Pharmacy Math

alligation the relative amounts of solutions of different percentages from a mixture of a given strength
apothecary system an early English system of weight and liquid measure
body surface area (BSA) the measurement of the height and weight of the patient to establish an estimate of his or her body
grain a base unit of weight in the apothecary system
gram a base unit of weight in the metric system
international system of units (SI) commonly known as the Metric System of weights and measures
liter a basic unit of volume used to measure liquids in the metric system
meter the basic unit of length used to measure the distance in the metric system
Metric System a sytem of weights based on the meter (length), the gram (weight), and the liter (volume)
nomogram a chart that uses the weight and height (size) of the patient to calculate his or her body surface area
percentage a percent number representing an amount per hundred, e.g., 5 percent represents 5 parts per hundred. It is expressed as follows: Percentage (%) = No. of parts/100 parts x 100
piggyback refers to a small-volume IV solution (25 - 250 mL) that is run into an existing IV line over a brief period of time (e.g., 50 mL over 15 minutes)
proportion is formed when two ratios are equal (or proportional) to one another, e.g., 1/2 = 5/10
ratio the relationship between two quantities, e.g., 1:10 or 1/10 is is read as one part in 10 parts, one in ten, or one-tenth
Created by: Goldilox