Podcast
Questions and Answers
What is the equivalent of 1 fluid dram (fl dr) in milliliters (mL)?
What is the equivalent of 1 fluid dram (fl dr) in milliliters (mL)?
A patient weighs 66 pounds and needs a medication with a dose of 2 mg/kg. What is the desired dose?
A patient weighs 66 pounds and needs a medication with a dose of 2 mg/kg. What is the desired dose?
A pediatric patient has a height of 100 cm and weighs 20 kg. What is their body surface area (BSA) in square meters?
A pediatric patient has a height of 100 cm and weighs 20 kg. What is their body surface area (BSA) in square meters?
A medication has a strength of 250 mg per tablet. If the desired dose is 1000 mg, how many tablets should the patient take?
A medication has a strength of 250 mg per tablet. If the desired dose is 1000 mg, how many tablets should the patient take?
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A pediatric patient is 5 years old and needs a medication with an adult dose of 200 mg. What is the dosage using Clark's rule?
A pediatric patient is 5 years old and needs a medication with an adult dose of 200 mg. What is the dosage using Clark's rule?
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What is the formula to calculate the total dose of a medication?
What is the formula to calculate the total dose of a medication?
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A patient needs a medication with a dose of 0.5 mg/kg, and the patient weighs 40 kg. What is the desired dose in milligrams?
A patient needs a medication with a dose of 0.5 mg/kg, and the patient weighs 40 kg. What is the desired dose in milligrams?
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What method is used to convert between different units of measurement, such as milligrams to micrograms?
What method is used to convert between different units of measurement, such as milligrams to micrograms?
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A medication has a concentration of 50 mg/mL, and the desired dose is 200 mg. How much fluid should the patient receive in milliliters?
A medication has a concentration of 50 mg/mL, and the desired dose is 200 mg. How much fluid should the patient receive in milliliters?
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What method is used to convert between different forms of the same medication, such as tablet to liquid?
What method is used to convert between different forms of the same medication, such as tablet to liquid?
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Study Notes
Medication Conversions
-
Unit conversions:
- 1 teaspoon (tsp) = 5 milliliters (mL)
- 1 tablespoon (tbsp) = 15 mL
- 1 fluid dram (fl dr) = 4 mL
-
Weight conversions:
- 1 pound (lb) = 0.45 kilograms (kg)
- 1 kilogram (kg) = 2.2 pounds (lb)
-
Ratio and proportion:
- Used to convert between different measurement systems
- Example: If 2 tablets = 1000 mg, how many tablets = 2500 mg?
Dosage Formulas
-
Desired dose formula:
- Desired dose (DD) = (Weight in kg) x (Dose in mg/kg)
-
Ordered dose formula:
- Ordered dose (OD) = (DD) / (Dose on hand in mg/unit)
- ** Dosage calculation formula:**
- Dosage = (DD) / (Strength of medication in mg/unit)
Pediatric Dosing
-
Body surface area (BSA) method:
- Used for pediatric patients to calculate dosage based on body surface area
- BSA (m²) = √(Height in cm x Weight in kg) / 3600
-
Clark's rule:
- Used for pediatric patients to calculate dosage based on age
- Dosage = (Age in years + 1) / (Age in years + 7) x Adult dose
-
Young's rule:
- Used for pediatric patients to calculate dosage based on age
- Dosage = (Age in years / (Age in years + 12)) x Adult dose
Medication Conversions
- 1 teaspoon (tsp) is equal to 5 milliliters (mL)
- 1 tablespoon (tbsp) is equal to 15 mL
- 1 fluid dram (fl dr) is equal to 4 mL
- 1 pound (lb) is equal to 0.45 kilograms (kg)
- 1 kilogram (kg) is equal to 2.2 pounds (lb)
- Ratio and proportion are used to convert between different measurement systems
Dosage Formulas
- The desired dose formula is: Desired dose (DD) = (Weight in kg) x (Dose in mg/kg)
- The ordered dose formula is: Ordered dose (OD) = (DD) / (Dose on hand in mg/unit)
- The dosage calculation formula is: Dosage = (DD) / (Strength of medication in mg/unit)
Pediatric Dosing
- The body surface area (BSA) method is used to calculate dosage based on body surface area
- BSA (m²) is calculated as: √(Height in cm x Weight in kg) / 3600
- Clark's rule is used to calculate dosage based on age: Dosage = (Age in years + 1) / (Age in years + 7) x Adult dose
- Young's rule is used to calculate dosage based on age: Dosage = (Age in years / (Age in years + 12)) x Adult dose
Dosage Calculations
Dosage Formulas
- Desired Dose Formula: calculates the desired dose in mg by multiplying the weight in kg by the dose in mg/kg, then dividing by the frequency in times/day.
- Total Dose Formula: calculates the total dose in mg by multiplying the desired dose in mg by the frequency in times/day.
- Fluid Dosage Formula: calculates the amount of fluid in mL by dividing the desired dose in mg by the concentration in mg/mL.
Medication Conversions
Ratio and Proportion Method
- used to convert between different units of measurement (e.g., mg to mcg).
- involves setting up a proportion with the known values and solving for the unknown value.
Unit Analysis Method
- used to convert between different units of measurement (e.g., mL to L).
- involves dividing the given quantity by the conversion factor to obtain the desired unit.
Equivalent Dose Method
- used to convert between different forms of the same medication (e.g., tablet to liquid).
- involves calculating the equivalent dose based on the strength and amount of the medication.
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Description
Practice converting between different units of measurement and calculate dosages using formulas. Units include teaspoons, milliliters, pounds, and kilograms. Learn and apply ratio and proportion concepts.
