Skills USA Medical Math

I

1

V

5

X

10

L

50

C

100

D

500

M

1000

1 mL = ? cc

1 cc

1 oz = ? g

28.35 g

16 oz = ? g

454 g

1 kg = ? oz

35.27 oz

2.2 lb = ? kg

1 kg

1 gtt = ? ML

0.0667 mL

15 gtt = ? mL

1 mL

1 tsp = ? mL

5 mL

3 tsp = ? mL

15 mL

1 oz = ? mL

30 mL

8 oz = ? mL

240 mL

1 pt = ? mL

480 mL

2 pt = ? qt

1 qt

2 pt = ? mL

960 mL

Convert Fahrenheit to Celsius

C = (F-32) * 5/9

Convert Celsius to Fahrenheit

F= 1.8°C + 32 or F = 9/5°C +32

1 gr = ? mg

60 mg

weight- grain (basic unit) abbreviation

gr

weight- dram abbreviation

dr or 3*

weight- ounce abbreviation

oz or 3*(loop at the end of the 3)

weight- pound abbreviation

lb

weight- 1 oz = ? dr = ? gr

16 dr, 437.5 gr

weight- 1 lb = ? oz = ? gr

16 oz, 7000 gr

volume- minim (basic unit) abbreviation

M or m*

volume- fluidram abbreviation

fl dr

volume- fluid ounce- abbreviation

3*(loop at the end of the 3)

volume- pint abbreviation

pt

volume- quart abbreviation

qt

volume- gallon abbreviation

gal

pt i = ? oz

16 oz

qt i = ? oz

32 oz

qt i = pt ?

ii (2)

5 mL = ? dr = ? tsp

1 dr, 1 tsp

15 mL = ? dr = ? T

4 dr, 1 T

30 mL = ? fl oz = ? T

1 fl oz, 2 T

240 mL = ? fl oz = ? cup(s)

8 fl oz, 1 cup

480 mL = ? fl oz = ? pt

16 fl oz, 1 pt

960 mL = ? fl oz = ? qt(s)

32 fl oz, 1 qt

calculating dosages

dose on hand (H)/quantity on hand (Q) = desired dose (D)/quantity desired (X)

calculating dosages formula

D/H x Q = X (desired dose (D) divided by dose on hand (H) multiplied by quantity on hand (Q) equals quantity desired (X)

calculating oral liquid dosages formula

D x H/Q = X (desired dosage (D) x dose on hand (H)/quantity on hand (Q) = quantity desired (X)

Intradermally injection

within skin

subcutaneously injection

into fatty tissue under skin

intramuscular injection

IM: into the muscle

intravenous injection (IV)

into the vein

calculations for medication in a vial

D/H x V

ordered: gentamicin 60 mg IM

on hand: gentamicin 80 mg/2 mL in a vial

60/80 x 2 = 120/80 = 1.5 mL

clark's rule & formula

more accurate than young's or fried's rule (uses average adult weight, considered to be 150 lb) pediatric dose = child's weight in lbs/150 lb x adult dose

young's rule & formula

used for children older than 1 year of age, pediatric dose = child's age in years/child's age in years + 12 x adult dose

fried's rule & formula

estimating dose of medication for infants younger than 1 year of age,

child's age in months/150 lb x average adult dose

1 mg = ? mcg

1000 mcg

1 g = ? mg = ? mcg

1000 mg = 1,000,000 mcg

1 qt = ? liter(s) = ? mL

1 liter, 960 mL

IV flow rates infusion formula

mL/hr (always represented in mL/hr!)

drip rate formula

flow rate (mL/hr) X drop factor (gtt/mL) X time conversion (1 hr/60 mins) = Drip rate (gtts/min)

tube feeding formulas

mL in can/x = strength

if needed to dilute in water, subtract the product from the equation above by the mL in the can.

mEq formula

(mg/MW) x valence, MW means molecular weight or mass

1 inch = ? cm

2.54 cm

1 kilometer = ? meters, ? miles

1,000 meters, 0.62 miles

1 lb = ? oz

16 oz (weight)

formula to find mg in mEq equation

mg = mEq x MW/Valence

formula to find mg/ml in a mEq equation

mg/mL = mEq/mL x MW/ Valence

1 kg = ? grams

1000 grams

3 feet (1 yd) = ? meters

.914 meters

a foot = ? meters

.3048 meters

1 meter = ? inches ? feet

39.37 inches, 3.281 feet

1 oz = ? kg

0.028 kg

10 centiliters = ? deciliters

1 deciliter

10 deciliters = ? liter(s)

1 liter

1 dr = ? mL

3.75 mL

1 mile = ? feet = ? meters = ?kilometers

5280 feet, 1609 m, 1.609 km

1 meter = ? cm = ? mm

100 cm, 1000 mm

10 mm = ? cm

1 cm

% given (w/v)

w = weight (g) v = volume (mL)

convert g to mg

percentage dose to prescribed dose formula

prescribed dose/drug concentration x volume the dose is in

body surface m^2 formula

m^2 = the square root of lb x in/3,131