metric & household measurements bcc pharmacy tech
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Metric & Household Measurements
BCC Pharmacy Tech
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Metric Measurements Metric system=system of choice for dealing
with weights and measures in the calculations of drug dosages
Decimal system 0.5 0.75 0.007
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Certain prefixes identify multiples of 10 that are being used.
4 most common; micro, milli, centi, kilo Prefixes can be used with any of the base
units weight (gram), volume (liter) or length (meter)
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Weight 1,000,000 mcg=1 g 1,000 mcg = 1 mg 1000 mg =1 g 1000 g = 1 kg
Volume 1000 mL = 1 L 1 cc = 1mL
Length 1 m = 1,000 mm or 100 cm 1 cm = 10 mm or 0.01 m 1 mm = 0.1 cm or 0.001 m
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Example 300 mg equals how many grams?
100 mg: 1 g:: _____ mg: _____ g
1000 mg: 1 g :: 300 mg: __x__ g
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More Practice 2.5 L equals how many milliliters? 180 mcg equals how many grams? 15 mm equals how many centimeters?
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Household Measurements Household measures are not accurate enough
for the nurse to use in the calculation of drug dosages in the hospital.
Metric equivalents are used. I & O or intake and output
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Metric Household Equivalents Metric Measure = Household Measure
5 mL = 1 tsp 15 mL = 1 Tbsp 30 mL = 1 oz 240 mL = 1 standard measuring cup 1 kg or 1000 g = 2.2 lb 2.5 cm = 1 in 1 foot = 12 inches
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Example 1 ½ cups equals how many milliliters? 1 cup : 240 mL :: 1 cup : 240 mL :: _____ cups : _____mL 1 cup : 240 mL :: 1 ½ cups : __x__ mL
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More Practice 35 kg equals how many pounds? 18 inches equals how many centimeters?
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To do Memorize the tables of metric and household
measurements. Study material on forming proportions for the
calculations problems relating to these measurements.
Complete the worksheet Check your answers Evaluate your learning