inspiration termination is set to 30% then the ventilator will stop
inspiration when the flow decelerates to a level equal to 30% of the
measured peak inspiratory flow. The lower the setting the longer the
inspiratory time and conversely, the higher the setting the shorter the
inspiratory phase.
If the spontaneous inspiratory effort does occur within the delay
period, the ventilator delivers pressure controlled breaths with the
preset inspiratory pressure to bring the breath rate up to the
minimum rate. The delay period calculation is 60 s/minimum rate +
([60 s/minimum rate] - previous measured breath period).
The inspiratory support pressure and the inspiratory pressure
settings are linked at the start of each case. When the inspiratory
support pressure setting is changed, the inspiratory pressure setting
is automatically adjusted to match the inspiratory pressure setting.
The link can be broken by changing the Pinsp setting through the
Vent Mode
menu during the case.
Spontaneous breaths that occur during this mode are indicated by a
color change in the waveform.
CPAP + PSV settings:
• Psupport
• PEEP
• Flow Trigger
• End of Breath
• Pmax
• Pinsp
• Minimum RR
• Tinsp
• Rise Rate
AB.91.041
1
2
3
T
I
1. Paw
2.
PEEP
3. Time
Figure 11-10 • CPAP + PSV waveform
Aisys CS²
11-34 2067226-001
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