Division 1 Introduction to Advanced Prehospital Care

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Division 1Introduction to AdvancedPrehospital
Care
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Chapter 7 Intravenous Access and Medication
AdministrationPart 3Medical Mathematics
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Topics

• Metric System Conversions
• Systems of Measure
• Medical Calculations

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Metric System

• Three fundamental units
• GramsMass
• MetersDistance
• LitersVolume

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Conversion Between Prefixes
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Medical Calculations
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Desired Dose

• Specific quantity of medication needed
• Most doses expressed as weight
• Grams
• Milligrams
• Micrograms
• May be standard or based on body weight

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Dosage and Volume on Hand

• The amount of drug available ina solution.
• Concentration is the weight pervolume.

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Calculating Medication Doses

• Volume to be administered
• Volume on hand (desired dose)
• Dosage on hand

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Calculating Infusion Rates

• Medicated Infusions
• Drops/minute
• Volume on hand x drip factor x desired dose
• Dosage on hand

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Calculating Infusion Rates

• Fluid Volume Over Time
• Drops/minute
• Volume to be administered (drip factor)
• Time in minutes

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• Exact flow rates are critical in pediatric
  patients since they cannot tolerate over- or
  under doses.

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Summary

• Metric System Conversions
• Systems of Measure
• Medical Calculations