Math Calculations Flashcards
Common Conversions
ug - kg
- 1000 ug = 1 mg
- 1000 mg = 1 g
- 1000 g = 1 kg
Common Conversions
cm - km
- 1 m = 100 cm
- 1 km = 1000 km
Temperature
Convert C to F
- C = (F - 32) x 5/9
- F = C x 9/5 + 32
- freezing point: 0 C or 32 F
- boiling point: 100 C or 212 F
Weight Conversion
- 1 kg = 2.2 lb
- 1 ton = 1000 kg
Dose Definitions
- Dose: amount measured
- Dosage: amount per weight of animal
- Concentration: calculated by manufacturer
Solution Definitions
- Solution: mixture of substances
- Solvent: capable of dissolving
- Solute: dissolves in liquid
- Dilution: reduction of concentration
- Diluent: agent that dilutes
Calculate Percent Stength of a Solution
Division based on what given
* v/v (two volumes)
* w/v (weight and volume)
* w/w (two weights)
* turn decimal produced into a percent
Concentration Example
w/v
Number of grams per 100 mL of solution
* 5% concentration = 5 grams per 100 mL
Concentrations
as Ratios
1: 100
* 1 g / 100 mL
* 1%
Calculating Strength of
Diluted Solutions
C2 x V2 = C1 x V1
* C2 and V2 are desired concentrations and volumes
* C1 and C2 are current stock concentrations and volumes
* percents can stay as percents / whole numbers
Calculate PPM
Parts Per Million
* 1 g solute per 1,000,000 mL
* turn % into g/mL
* cross multiply with x / 1,000,000 mL
Drip Rate
Formula
- Volume (mL) x drops/mL
- Divide top by time (seconds)
- Answer best in drops / min
CRI
Constant Rate Infusions
* given when IV drugs are administered over long periods
CRI
Formula
M = (D x W x V) / R
* M = drug amount in ug or mg to be added
* D = dosage ( ug/kg/min or mg/kg/min)
* W = body weight (kg)
* V = volume of base solution (mL)
* R = infusion rate (mL/min)
Veterinary Drug
Labels
Caution label to say restriction to be used on or by the order of a vet
