Medical math Flashcards
kilo
1,000
hecto (hector is 100)
100
deka
10
deci
0.1
centi (centurian)
0.01
milli
0.001
micro (the number)
0.000001
prefix pneumonic (KHDDCMM)
Kitty Hawk Doesn’t Drink Canned Milk Much - kilo, hecto, deka, deci, centi, milli, micro
abbreviation for gram
g
abbreviation for milliliter
mL
abbreviation for liter
L
converting smaller to larger
move decimal point 3 spaces to left
converting larger to smaller
move decimal point 3 spaces to right
1 kg is how many grams
1000
1 gram is how many milligrams
1000
1 mg is how many micrograms
1000
1 liter is how many millilters
1000
1 millilter is how many liters
0.001
1 meter is how many centimeters (you need 100 cents for the meter)
100
1 millimeter is how many meters (this is also 1000)
0.001
teaspoon is how many mL (Milli likes 5 teaspoons)
5 mL
a tablespoon is how many mL
15 mL
a measuring cup is how many ounces
8 oz
1 inch = how many cm
2.5 cm
1 ounce is how many mL
30 mL
1 pt is how many ounces
16 oz
1 qt is how many ounces
32 oz
1 cup is how many oz
8 oz
16 oz is how many lbs
1 lb
2.2 lb is how many kg
1 kg (1000 g)
1 in is how many cm
2.5 cm
larger to smaller conversion, you need to…
multiply
to convert from smaller to larger, you need to…
divide
dimensional analysis
use a fraction and cancel the one you don’t want
conversion factor method
1 kg = 2.2 lb, just divide.
ratio and proportion (the ratio is mean)
1 kg: 2.2 lbs = x kg: 110 lbs i.e means and extremes
1 pint is how many ounces
16 oz
1 pint is how many ml (500 milis are pint sized)
500 ml
1 ounce is how many tablespoons
2 tablespoons
1 pt is how many mL
500 mL
1 qt is how many pts
2 pt
1 qt is how many mililiters?
1000 ml (really 960)
converting C to F (they multiply first)
multiply and then add
convert F to C (the subtract first in the US)
subtract and then divide
the formula method (the formula at DQ)
D/H x Q = X
dimensional analysis method
ratio
1 cc is how many mL?
1
how many mL in one gram? (Millie wants a gram for $10)
10 mL
0.015 as percent
1.5 percent - remember just move the decimal 2 places to the right
2 is what percent of 600
2 divided by 600, answer times 100 = .33%
find percent how? 20 is what % of 100
20 divided by 100, answer times 100 = 20
a client weights 275 before dieting, and 250 after dieting. What is the percent of change?
25 lbs divided by 275, answer times 100 = 9%
roman numerals acronym
lovely cats don’t meow (LCDM) 50, 100, 500, 1000)
insulin is never given in what measurement?
mL, it’s always given in units
1 centimeter is how many mm?
10 mm
pound is how many ounces?
16
.4 pounds to ounces
multiply .4 times 16 (16 oz in a lb)
how many ounces in a kilogram? (Kill 35 ounces)
35.27
how many tsp in 1 T?
3 tsp in 1 T
is miligrams or grams smaller?
milligram is smaller
is gram or kilogram bigger?
kilogram
king henry died drinking chocolate milk micro
kilo, hecto, deca, deci, centi, and milli
rapid acting insulin label
has nothing on it
R on insulin label (Robin is not short)
short acting insulin
N on insulin label (intermediate is normal)
intermediate acting
nothing on label but subcutaneous only
long acting insulin
gtt is a drop, therefore CANNOT…
be a decimal, always round up
smallest unit of measure is…
drop
1 tablespoon is how many teaspoons?
3
1 oz is how many tablespoons?
2
1 pint is how many cups?
2
1 quart is how many cups?
4 cups
1 cup is how many milliliters? (Millie made $240 off of one cup)
240
normal saline .9% is..
2 tsp salt in 4 cups of water
acetic acid (.25%)
3 tablespoons of white vinegar in 4 cups of water
one cup is how many OUNCES
8 oz
mEq is…
milliequivalent
end my epi
outer to inner
5 1/4 - find the ratio
21:4 change it to an improper fraction first - 21/4
5 1/4 - find the percentage
change to improper fraction - 21/4 - then find decimal - 5.25 - then multiply by 100 - 525%
how many mg in a grain? (grainy sight at 60)
60 mg
1 minim (mini drop)
1 drop
how many mL in a dram? (dramarama at 4)
4 mL
in apothecary, symbol is placed where?
in front - gr 7 1/2
in apothecary, fractions are expressed as…
fractions or roman numerals
how many mg in a grain? Milli is also grainy at 60
60 (but measurements are not exact, it’s actually 64)
flow rate just means…
gtt/min
IV tubing Calibration
requires 10, 15, or 20gtt to equal 1mL - routine for adult IV
mini-microdrop set
- Used when more exact measurement needed
- commonly used in pediatric patients
- Requires 60gtt to equal 1mL
