Instructions for use – Infinity Acute Care System – Monitoring Applications VG6.n
425
External devices – Servo-i ventilator
Viewing loops
Loops offer important information about the
response of the patient to mechanical ventilation.
You can review loops on two pages:
Pressure/volume and Flow/volume.
Pressure-volume loops illustrate changes in
compliance, resistance, and work of breathing. A
mandatory breath plots counterclockwise, while a
spontaneous breath plots clockwise. Inspiration
starts at a point defined by baseline pressure and
the volume level at the beginning of inspiration.
Flow-volume loops also report mechanical and
spontaneous breaths. Inspiration begins at the
origin and moves upward and clockwise. Expiration
plots below the horizontal axis and progresses
counterclockwise to the original starting point.
To view loops
1
Select the
Sensor parameters...
button on the
main menu bar.
2
Select the
Ventilator
tab. If you cannot see the
tab, select the following two symbols located in
the upper right corner of the dialog:
–
symbol
–
display filter button
3
Select the
PV Loop
tab to view pressure-
volume loops or select the
FV Loop
tab to view
flow-volume loops.
4
Select the
Loops
tab to view all loops in one
dialog.
5
Select the
Loop draw
button at the bottom of
the page to choose how many loops are drawn
on top of each other before the screen is
cleared.
6
Select the
Save reference
button at the bottom
of the page if you want to save a loop for future
analysis and comparison.
NOTE
In neonatal mode, ventilator loops are not avail-
able on the Cockpit.
NOTE
Depending on which devices are connected to the
Cockpit, two
Ventilator
tabs may be displayed. If
you select the
Ventilator
tab and the selected
page has the message
Medibus.X ventilator de-
vices
displayed as a header, you have selected
the wrong
Ventilator
tab).
