DISPLAY F EATURES
VF8 DELTA/DELTA XL/KAPPA 21-21
Pressure/Volume Loops
Pressure/Volume loops illustrate changes in compliance, resistance and work of
breathing. A mechanical breath plots counter-clockwise, while a spontaneous breath
plots clockwise. Inspiration starts at a point defined by baseline pressure and the
volume level at the beginning of inspiration; loops show corresponding Dynamic
Compliance (Cdyn) values (see page 21-16).
Flow/Volume Loops
Flow/Volume loops report mechanical and
spontaneous breaths the same way. Inspiration
begins at the origin and moves upward and left to
right (clockwise). Expiration plots below the
horizontal axis and progresses right to left in a return
to the origin. The Flow/Volume loop display shows
the corresponding PEF value (see illustration on
page 21-16).
Displaying Loops
1. Open the Paw or Vent setup menu (see page
21-11).
2. Click on
PV Loop (on PAW menu) to display pressure/volume loop.
3. Click on
FV Loop (on Vent menu) to display flow/volume loop.
The following illustration shows a pressure/volume loop. Click on the control keys at
the bottom of the screen to change loop settings.
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