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Interactive and limiting controls in PTV.
The user needs to be aware that the following controls interact.
The PEEP control interacts with the PIP control. When increasing the PEEP
pressure, the PIP pressure will track accordingly if initially below the starting
PEEP level.
The PIP control is limited by the PEEP. The user cannot decrease the PIP level
below the PEEP level. The PEEP parameter control displays a warning stating
the limiting pressure.
TTV (Volume targeting) of all triggered and mechanical breaths in PTV.
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
machine 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 8. 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).
Breath
Detection
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