Table of Contents
For continuous infusions, calculate the rate in drops per minute:
Drop rate = (Volume in mL × Drop factor) / Time in minutes
10. Calculating Adjusted Body Weight
Used for obese patients to avoid overdose:
Adjusted BW = Ideal Body Weight + 0.4 × (Actual Body Weight – Ideal Body Weight)
Mastering these calculations helps pharmacy techs ensure safe and effective medication dispensing. Regular practice and verification are key to proficiency.
BMI helps assess patient health status:
BMI = (Weight in kg) / (Height in m)²
9. Calculating Infusion Rates
For continuous infusions, calculate the rate in drops per minute:
Drop rate = (Volume in mL × Drop factor) / Time in minutes
10. Calculating Adjusted Body Weight
Used for obese patients to avoid overdose:
Adjusted BW = Ideal Body Weight + 0.4 × (Actual Body Weight – Ideal Body Weight)
Mastering these calculations helps pharmacy techs ensure safe and effective medication dispensing. Regular practice and verification are key to proficiency.
BSA is often used to calculate chemotherapy doses. The Mosteller formula is:
BSA (m²) = √[(height (cm) × weight (kg)) / 3600]
7. Calculating Pediatric Dosages
Pediatric doses are often based on weight or BSA. Always verify calculations with current guidelines.
8. Calculating Body Mass Index (BMI)
BMI helps assess patient health status:
BMI = (Weight in kg) / (Height in m)²
9. Calculating Infusion Rates
For continuous infusions, calculate the rate in drops per minute:
Drop rate = (Volume in mL × Drop factor) / Time in minutes
10. Calculating Adjusted Body Weight
Used for obese patients to avoid overdose:
Adjusted BW = Ideal Body Weight + 0.4 × (Actual Body Weight – Ideal Body Weight)
Mastering these calculations helps pharmacy techs ensure safe and effective medication dispensing. Regular practice and verification are key to proficiency.
Determine how many mL of fluid to administer per hour:
Flow rate (mL/hr) = Total volume (mL) / Time (hours)
6. Body Surface Area (BSA) Calculations
BSA is often used to calculate chemotherapy doses. The Mosteller formula is:
BSA (m²) = √[(height (cm) × weight (kg)) / 3600]
7. Calculating Pediatric Dosages
Pediatric doses are often based on weight or BSA. Always verify calculations with current guidelines.
8. Calculating Body Mass Index (BMI)
BMI helps assess patient health status:
BMI = (Weight in kg) / (Height in m)²
9. Calculating Infusion Rates
For continuous infusions, calculate the rate in drops per minute:
Drop rate = (Volume in mL × Drop factor) / Time in minutes
10. Calculating Adjusted Body Weight
Used for obese patients to avoid overdose:
Adjusted BW = Ideal Body Weight + 0.4 × (Actual Body Weight – Ideal Body Weight)
Mastering these calculations helps pharmacy techs ensure safe and effective medication dispensing. Regular practice and verification are key to proficiency.
Pharmacy technicians play a crucial role in ensuring patients receive the correct medication and dosage. Mastering pharmaceutical calculations is essential for accuracy and safety. Here are the top 10 calculations every pharmacy tech should know.
1. Converting Units
Converting between units such as milligrams (mg), grams (g), milliliters (mL), and liters (L) is fundamental. Remember the basic conversions:
- 1 g = 1000 mg
- 1 L = 1000 mL
- 1 kg = 1000 g
Always double-check conversions to prevent dosage errors.
2. Calculating Dosages Based on Weight
Many medications are prescribed based on patient weight, typically in mg/kg. The formula is:
Dosage = (Dose per kg) × (Patient weight in kg)
3. Percentage Calculations
Percentages are used to prepare solutions or determine drug concentrations. To find the percentage:
Percentage (%) = (Part / Whole) × 100
4. Dilution Calculations
When preparing a diluted solution, use the formula:
C1 × V1 = C2 × V2
5. IV Flow Rate Calculations
Determine how many mL of fluid to administer per hour:
Flow rate (mL/hr) = Total volume (mL) / Time (hours)
6. Body Surface Area (BSA) Calculations
BSA is often used to calculate chemotherapy doses. The Mosteller formula is:
BSA (m²) = √[(height (cm) × weight (kg)) / 3600]
7. Calculating Pediatric Dosages
Pediatric doses are often based on weight or BSA. Always verify calculations with current guidelines.
8. Calculating Body Mass Index (BMI)
BMI helps assess patient health status:
BMI = (Weight in kg) / (Height in m)²
9. Calculating Infusion Rates
For continuous infusions, calculate the rate in drops per minute:
Drop rate = (Volume in mL × Drop factor) / Time in minutes
10. Calculating Adjusted Body Weight
Used for obese patients to avoid overdose:
Adjusted BW = Ideal Body Weight + 0.4 × (Actual Body Weight – Ideal Body Weight)
Mastering these calculations helps pharmacy techs ensure safe and effective medication dispensing. Regular practice and verification are key to proficiency.