Numeracy for Nursing Practice

SI Unit Conversions (grams, milligrams, etc.)

• SI Unit Conversions (grams, milligrams, etc.)

  In this section, we will cover how to calculate with units of measure within the same system. You will learn about the relationship between units of measure in the metric system - kilograms, grams, milligrams and micrograms, and how to convert between them quickly and easily.

  This skill is very important for avoiding drug errors. An incorrectly placed decimal point could potentially lead to a 10, 100 or even 1000 times overdose or underdose - with potentially fatal implications for the patient.
  

  
  

  The Rules
  

  
  

  
  

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    The Strategies

    1. Moving the Decimal Point

    
    

    The following link takes you to the website of Queen's University Belfast; one of the very best online resources for student nurses. A clearly explained screencast walks you through the 'moving the decimal point' method, and the interactive questions allow you to test your skills.

    Queen's University Belfast - Conversions for Drug Calculations.

    
    
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    2. Place Value Charts
    

    Screencast - Place Value Charts 1

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    Place Value Charts (cont.)
    

    Using a Place Value Chart 2

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    The Tools

    Further resources to help you develop your skills.
    

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    Test Yourself - Unit Conversions File

    3.4 MB

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    Place Value Slide Rule Kit Folder

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    This folder contains all the documents and information you need to make your own effective slide rule for working out unit conversions.

    1. Print the document

    2. Laminate the document (recommended so you can wipe clean and use again)

    3.Score or cut along the dotted lines

    4. Insert the strip into the slot

    5. Job done!

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    Interactive Gattegno Chart File

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    You can use this chart to consolidate your understanding of positional notation (place value). Change the digits in the number, and watch the relevant chart sections light up.
    

    
    

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    The Quiz

    
    

    Once you've decided which strategy works best for you, test your skills with this interactive quiz.
    

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    SI Unit Conversions - Test Yourself Quiz

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