Measuring Ventilation Parameters
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IMT Analytics AG
If you are setting a trigger for the first time, it is important to know the characteristic of
the signal that will be used for the trigger (flow or pressure). It is therefore advisable to
analyse that characteristic with the FlowLab software first. Graphically, it is then very
easy to decide where the triggers should be placed.
In the following we will now show a few examples that also point to potential problems.
9.5.1 Flow curve downstream of the Y-piece
This example shows a flow curve downstream of the Y-piece. The standard triggers
(> 3 L/min / < -3 L/min) can be used in this case without any problems.
In such a situation it is important to ensure that the trigger is signifi-
cantly above the noise of the baseline or else false triggering can be
caused.
9.5 Finding the correct trigger
values
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