Sunday, October 26, 2008
Intro to Med Math

Order of operations

PEMDAS
Parenthesis
Exponents
Mult
Div
Add
Sub

(Please Excuse My Dear Aunt Sally)

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lb/2.2= KG so 125lbs = 125/2.2=56.81

1ml = 1cc

% Solutions

% = G/100ml

Eg.
3% = 3G/100ml
First convert to your dose (mg in this case)
So… 3000mg/100ml reduce to 30mg/1ml


Bolus Calcs
Desired Dose/Dose On Hand = Volume to Admin or DD/DOH=VTA

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Some Conversions

• °C = (°F – 32) ÷ 1.8 For example: (68°F-32) ÷ 1.8 = (36) ÷ 1.8 = 20°C
• °F = (°C x 1.8) + 32 For example: (20°C x 1.8) + 32 = (36) + 32 = 68°F

g = gram
kg = kilogram (1,000g)
mg = milligram (¹/_1,000g)
mcg or µg = microgram (¹/_1,000,000g)

L or l = litre (or liter in US)
cl = centilitre (¹/₁₀₀ L)
ml = millilitre (¹/₁₀₀₀ L)
µl = microlitre (¹/_1,000,000 L)

2. kilo- hecto- deka- [unit] deci- centi- milli-

3. Each step is ten times or one-tenth as much as the step on either side

4. So… kilo(1000)- hector(100)- deka(10)- [unit] deci (1/10)- centi (100)- milli(1/1000)- micro(¹/_1,000,000)

See the rest here… http://www.purplemath.com/modules/metric.htm

Another good way to remember metric units

• King Henry Doesn’t [Usually] Drink Chocolate Milk