Measurements, Mathematical Conversions, Dosage Calculations Flashcards
Micro-
Base Unit: divide 1,000,000
Decimal Value/Whole Number: 0.000001
Milli-
Base Unit: divide 1,000
Decimal Value/Whole Number: 0.0001
Centi-
Base Unit: divide 100
Decimal Value/Whole Number: 0.01
Base Unit
1
1
Kilo-
Base Unit: x 1,000
Decimal Value/Whole Number: 1,000
Apothecary Measurements
15 grains=1,000 mg
1 minim=1 drop
1 dram=60 minims
Household
15 drops (gtt)
Apothecary: 15 to 16 minims
Metric: 1mL
Household
1 teaspoon (tsp)
Apothecary: 1 dram
Metric: 5mL
Household
1 tablespoon (tbsp)
Apothecary: 4 drams
Metric: 15mL
Household
1 fluid ounce (oz), 2 tbsp
Apothecary: 8 drams, 1oz
Metric: 30mL
Household
1 cup
Apothecary: 8oz
Metric: 240mL
Household
1 pint
Apothecary: 1 pint
Metric: 480mL (about 500mL)
Household
1 quart
Apothecary: 1 quart
Metric: 960mL (about 1L)
Household
1 gallon
Apothecary: 1 gallon
Metric: 3,830mL (about 1 gallon)
Household
2.2 pounds (lb)
Apothecary: 2.2 lb
Metric: 1 kilogram (kg)
gram to mg
mg to mcg
1 gram=1,000 mg
1mg=1,000 mcg
0.088 mg convert to mcg
0.088 x 1,000=88 mcg
66 lb convert to kg
66 lb/ 2.2 lb =30 kg
15 mL convert to tsp
15=5x=3 tsp
50 mL convert to cap
50=25x=2 cap
HINT
desired over have x quantity=Xq
5 mg/kg/day divided into 4 doses for 88 lb child, available in meds 12.5 mg in 5mL
88=2.2X=40kg=5mg x 40kg=200/4=50mg/dose
5x50=12.5X=20mL
Body Surface Area
BSA
calculates the dose for children under 12
BSA of child m^2/1.7 m^2 x adult dose = child’s dose
BSA of 0.7 and adult dose of 50mg=0.7m^2/1.7m^2 x 50mg =20.5 mg
