1. Medication
Administration

2. Medical Mathematics
Part 3

3. Part Three Topics
 Metric system conversions
 Systems of measure
 Medical calculations

4. Metric System
 Three fundamental units
 Grams—Mass
 Meters—Distance
 Liters—Volume

5. Conversion Between Prefixes

7. Medical Calculations

8. Desired Dose
 Specific quantity of medication
needed.
 Most doses expressed as weight:
 Grams.
 Milligrams.
 Micrograms.
 May be standard or based on body
weight.

9. Dosage and Volume on Hand
 The amount of drug available in
a solution.
 Concentration is the weight per
volume.

10. Calculating Medication Doses
Volume to be Administered =
volume on hand (desired dose)
dosage on hand

11. Calculating Infusion Rates
Medicated Infusions
Drops/minute=
Volume on hand x drip factor x desired dose
Dosage on hand

12. Calculating Infusion Rates
Fluid Volume Over Time
drops/minute =
Volume to be administered (drip factor)
Time in minutes

13. Dosage and Infusion Rates
in Pediatric Patients
Exact flow rates are critical in pediatric
patients since they cannot tolerate
over- or under doses.

14. Part Three Summary
 Metric system conversions
 Systems of measure
 Medical calculations