5.3 Settings
5.3.1 Trigger functionality
5
Trigg. Flow
-2
Trigg. Pressure
Trigger sensitivity determines the level of
patient effort needed to trigger the ventilator
to inspiration.
Trigger sensitivity can be set as flow triggering
(settings above zero) or pressure triggering
(settings below zero). Normally flow triggering
is preferable as this enables the patient to
breathe with less effort.
The sensitivity is set as high as possible
without self-triggering. This ensures that
triggering is patient initiated and avoids
auto-cycling by the ventilator.
Important: In NIV it is not possible to set
trigger sensitivity.
-20 10
06
Trigg. Pressure Trigg. Flow
WHITE GREEN RED
The trigger sensitivity bar has different colors
based on the setting. A green bar indicates a
normal setting for flow triggering. The risk of
self-triggering increases when the bar is red.
A white bar indicates pressure triggering.
If the trigger sensitivity is set too high, a self
triggering (auto-triggering) condition may be
reached. This condition can also be reached
if there is leakage in the breathing system, e.g.
if an uncuffed endotracheal tube is used.
Triggering will then be initiated by the system
and not by the patient. This should always be
avoided by decreasing the trigger sensitivity.
56
SERVO-s VENTILATOR SYSTEM V8.0, User's Manual
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