Mathematics and Calculations for the Veterinary Anesthetist

 



1. Right Patient

2. Right Agent

3. Right Dose

4. Right Route

5. Right Time

6. Right Technique

7. Right Documentation

The Basics: Metric System


Conversion of units requires the use of a “conversion factor,” which is any equivalent equation in which the known and the unknown units are involved (Tables 3.13.4) (Bill 2000). You must set up a proportion of values on either side of the equation.


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Cross-multiply and divide.


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50 pounds = 22.7 kg


Table 3.1. Weight.























Unit Fraction Symbol
Kilogram 1000 grams kg
Gram 1000 milligrams g
Milligram 1/1000 of a gram mg
Microgram 1/1,000,000 of a gram μcg or μg

Table 3.2. Weight.


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Table 3.3. Volume.


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Table 3.4. Common unit conversions.



















1 kilogram = 2.2 pounds
1 teaspoon = 5 mL
1 tablespoon = 15 mL
1 grain = 60 mg

Percentages


Percent can be expressed as “out of 100” or “for every 100.” For example: 25% can be written as


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The decimal point can be moved two places to the left to achieve the same calculation.


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Agent strength as percent solution


Agents with the dose listed as a concentration percent represent grams in 100 mL.


Lasix as a 5% solution has a concentration of 50 mg/mL.


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Lidocaine as a 2% solution has a concentration of 20 mg/mL.


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The decimal point can be moved one place to the right in any percent solution to discern the mg/mL concentration.

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Aug 12, 2017 | Posted by in SUGERY, ORTHOPEDICS & ANESTHESIA | Comments Off on Mathematics and Calculations for the Veterinary Anesthetist
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