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Carestation
620/650/650c (A1)
11-34
setting for Exit Backup is 2. When Exit Backup is set to Off, the user
must reselect the PSVPro mode to reactivate PSVPro. Upon
returning to PSVPro the ventilator immediately begins providing
pressure supported breaths to the patient using the established
settings.
Spontaneous breaths that occur during this mode are indicated by a
color change in the waveform.
CPAP + PSV mode
Continuous positive airway pressure + pressure support ventilation
mode is used on spontaneously breathing patients. This mode of
ventilation provides a constant support pressure once the ventilator
senses that the patient has made an inspiratory effort. In this mode,
the clinician sets the Pressure support (Psupport) and PEEP levels.
The patient establishes the rate, inspiratory flow, and inspiratory
time. The tidal volume is determined by the pressure, lung
characteristics, and patient effort.
CPAP + PSV uses an inspiration termination level that establishes
when the ventilator will stop the pressure supported breath and cycle
to the expiratory phase. The inspiration termination level is user
adjustable from 5 to 75%. This parameter sets the percent of the
peak inspiratory flow that the ventilator uses to end the inspiratory
phase of the breath and to cycle into the expiratory phase. If the
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
2076152-001
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