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TTV (Volume targeting) of backup breaths in CPAP.
When the user selects TTV the PIP control becomes the MAX PIP control. The
Max PIP control allows the user to set the maximum pressure at which a volume
limited backup breath is delivered. In TTV the volume that the machine delivers is
the limiting factor.
Note: On discontinuing TTV the ventilator defaults to a safe PIP level of 5
mbar above the set PEEP level, irrespective of what the user has set. The
User will then have to reset the PIP to the required level.
The inspiratory time Ti will change to Max Ti as the delivered volume limits the
backup breath rather than the inspiratory time. The actual inspiratory time (Ti
Meas.) will be displayed in the lung mechanics and measurement panel and
parameter window.
Step 6. Set the Breath Detection threshold for Apnoea settings. The threshold is found
in the flow waveform window. (This waveform will not appear when operating
without a flow sensor).
Step 7. Set the High and Low Tidal Volume alarm thresholds. These thresholds are
found in the Tidal Volume waveform window. (This waveform will not appear
when operating without a flow sensor).
Step 8. If required, set the minute volume alarms. The alarm thresholds are found by
selecting the minute volume graph . Once set the user can revert to the
default waveform display.
Note: The user cannot set the high and low minute volume alarms when the
flow sensor is not connected.
Breath
Detection
Low
Tidal Volume
High
Tidal Volume
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