Standard Temperature and Pressure. The gas flow rate and volumes are displayed in
terms of what the gas flow rate and volume would be if the gas was 21 °C and
1 atmosphere (101.3 kPa) of pressure.
Body Temperature and Pressure Saturated. The gas flow rate and volumes are
displayed in terms of what the gas flow rate and volume would be if the gas was changed
to 37 °C, the actual pressure, and also saturated with water vapor.
Body Temperature and Pressure Dry. The gas flow rate and volumes are displayed in
terms of what the gas flow rate and volume would be if the gas was changed to 37 °C,
but maintaining the actual pressure.
User Standard Temperature and Pressure. The gas flow rate and volumes are
displayed in terms of what the gas flow rate and volume would be if the gas was at the
temperature and pressure conditions specified by the user.
Breath Triggers
Triggers are used to detect the start of the inspiratory and expiratory breath cycles. Triggers can be
based on the flow rate, pressure, or from a TTL voltage signal. The Flow Analyzer can
automatically detect the breath using the flow rate. You can also manually set your own start and end
trigger values using the flow rate or low pressure.
Access the Triggers screen by pressing on the currently selected trigger or the gear icon from the
dashboard of the
Flow Analyzer. Triggers can also be accessed through the Menu by
selecting Settings and then the Triggers and Averaging option.
Flow Rate – Auto Triggers
The Certifier Flow Analyzer default is to trigger automatically using the flow rate. Under most
circumstances, it is recommended to use the Auto Trigger feature. In Auto Trigger mode, the Certifier
Flow Analyzer will use the flow rate to detect the waveform and automatically assign the start of the
inspiratory phase and expiratory phase for each breath. Note that the Graph Screen can display
trigger timing indicators so that you may see the approximate values that the Certifier Flow Analyzer is
using for triggers.
If two flow modules are connected (ex. 4081 and 4082), the 4081 high flow will always control triggers.
If both connected flow modules are the same model (ex. two 4081s or two 4082s), then the flow
module connected to the A port will control triggering. An asterisk (*) will be displayed before the serial
number in the module card of the flow module that is controlling the triggers.
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