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PSVPro mode
M1145956
11 Specifications and Theory of Operation
PSVPro is pressure supported ventilation with apnea backup.
PSVPro is a spontaneous mode of ventilation that provides a
constant 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.
PSVPro 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.
An apnea backup mode is provided in the event the patient stops
breathing. When setting this mode the clinician adjusts the inspiratory
pressure (Pinsp), respiratory rate (RR) and the inspiratory time
(Tinsp). As long as the patient is triggering the ventilator and the
apnea alarm does not activate, the patient will get pressure-
supported breaths and the ventilator will not deliver machine breaths.
If the patient stops triggering the ventilator for the set apnea delay
time, the apnea alarm will activate and the ventilator will automatically
switch to the backup mode that is SIMV-PC mode. Once in this mode
the ventilator will begin delivering machine Pressure Control breaths
at the inspiratory pressure level, inspiratory time and rate that the
user has set. If, during this mode, the patient takes spontaneous
breaths in between the machine breaths, the patient will receive
pressure supported breaths.
PSVPro mode settings:
•
Psupport
•
PEEP
•
Trig Window
•
Flow Trigger
•
End of Breath
•
Pmax
•
Backup Time
•
Pinsp
•
RR
•
Tinsp
•
Rise Rate
•
Exit Backup
11-21
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