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===Capnograph===
===Capnograph===
[[Image:Capnograph.jpg|Center]]
<center>
{| border="1" cellpadding="6"
|-style="background:#B0E0E6; color:black"
!'''Stage'''
!'''Represents'''
|-
|<font color=#0C1A5D> '''A''' </font>
|Exhalation of Carbon Dioxide from dead space.
End tidal carbon dioxide should be zero at this point
|- style="background:#F0F8FF; color:black"
|<font color=#0C1A5D>'''B''' </font>
|Start of phase 1 - The beginning of the respiratory upstroke.
|-
|<font color=#0C1A5D>'''C''' </font>
|End of phase 1 and the beginning of the expiratory plateau.
|- style="background:#F0F8FF; colour:black"
|<font color=#0C1A5D>'''D''' </font>
|End of the expiratory plateau.
This is the maximum end tidal carbon dioxide level.
It is the beginning of the inspiration and phase 4.
|-
|<font color=#0C1A5D>'''E''' </font>
|End of inspiration.
End tidal carbon dioxide should reach zero at this point.
|-
|}
</center>
# Phase 1 is the inspiratory baseline and indicates inspired carbon dioxide, therefore should be zero.
# Phase 1 is the inspiratory baseline and indicates inspired carbon dioxide, therefore should be zero.
# Phase 2 is the expiratory upstroke and indicates the alveoli and conducting airway carbon dioxide levels.
# Phase 2 is the expiratory upstroke and indicates the alveoli and conducting airway carbon dioxide levels.