TSI Incorporated Certifier FA Plus, Operator'S Manual

Page: 37 / 63

2: Setup and Operation 27
2.3.7 Flow Triggering
If auto-triggering is not providing reasonable results, consider using either manual flow
or manual pressure triggering. To use manual flow triggering, select the flow radio
button and uncheck the "Auto-Triggering" checkbox. Similarly, to use manual pressure
triggering, select the pressure radio button. For a breath to be detected, trigger settings
must be set appropriately for the waveform of interest. There are two suggested
methods for determining the appropriate start and end trigger values: 1) switch the
Certifier FA Plus Test System to the graphing screen and observe the flow or pressure
readings at the start and the end of inspiration and 2) observe the flow and pressure
wave form from the ventilator being tested. For robust flow and pressure triggering
always set the "End Trigger" level lower than the "Start Trigger". For example, a manual
flow trigger setting may be +5 L/min for a start trigger and -5 L/min for an end trigger
setting. These numbers can be optimized based upon your specific application.