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Formulas
temp conversions and pediatric doses
Question | Answer |
---|---|
Farenheit to Celsius | °C = (F°-32)÷1.8 |
Celsius to Farenheit | F°=(1.8C)+32 |
Young's Rule *knowing the child's age in years - 1 year of age to 12 years of age | (age of child/age of child + 12) x (average adult dose) |
Clark's Rule *knowing the child's weight in pounds | (weight of child / 150) x (average adult dose) |
Fried's Rule *infants up to 12 months | (age in months / 150) x (adult dose) |
Clark's Rule | being phased out because the average adult now weighs more than 150 lbs |
Tech alert for pediatric doses | if the manufacturer has a suggested amount for a pediatric dose, that dose should always be used! |
pediatric doses | age is no longer considered a valid criterion for determining pediatric dosing, but a tech should still be aware of the formulas |
tech alert | pediatric dosing rules are approximate answers and should not be used with medications that have a narrow therapeutic range - one in which there is little difference between therapeutic and toxic levels |
calculating medication doses by body surface area (BSA) | an amount per square meter (m2) provide the most accurate determination of therapeutic doses because they are based on weight and height |
BSA calculations | often used for pediatric patients, elderly persons, and when dosing toxic medications such as chemotherapeutics |