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→Pressure and Mask Pressure
===Pressure and Mask Pressure===
The pressure graph shows the pressure as it varies over time. The mask pressure graph shows the pressure at the mask on a breath by breath basis.
[[File:OSCAR pressure.png]]
Zooming in shows how the mask pressure is a high resolution chart sampled 25 times per second, while the pressure is only sampled once per second. Depending on your machine settings there may be several traces shown - usually the pressure in inhale (IPAP) and on exhale (EPAP).
[[File:OSCAR pressure detail.png]]
===Flow Limitation===
===Leak Rate===
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