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4.1
Treatment Modes
This section describes the ventilating modes of the Vivo 2.
4.1.1
PCV+A — Pressure Controlled Ventilation (Assisted)
In PCV+A mode, the ventilation is controlled by set values for pressure, inspiratory
time, and rise time.
The inspiration is started by either of the following triggers:
•
•
The inspiration stops and the expiration starts by either of the following triggers:
•
•
4.1.2
PSV — Pressure Support Ventilation
In the PSV mode, the patient's spontaneous breathing is assisted by the ventilator. The
patient controls the start of inspiration through the inspiratory trigger and the start of
exhalation by the expiratory trigger.
The set pressure is used as a target pressure, if the flow is decreased to the expiratory
trigger level before the set pressure is reached, the expiration starts.
When an inspiration is started either when the patient triggers a breath, or when the
breath rate setting initiates an inspiration in case of a prolonged apnea, the ventilator
delivers a flow up to a certain preset pressure limit. In case of a patient-initiated breath,
the patient continues the breath for as long as they wish and cycles off when a percent-
age of drop in peak inspiratory flow (expiratory trigger) has been reached.
Doc. 007229 D-3
PSV
X
Ramp Down
Ramp
X
Pressure
Humidifier
X
X
Heated
Circuit
(1) Without Target Volume
(2) With Target Volume
The patient actively takes a breath.
The interval set by the breath rate, if the patient does not actively trigger a breath.
The inspiration time expires.
The High Pressure Alarm limit is reached.
PCV
S
S/T
+A
X
X
X
X
X
X
X
X
X
X
X
X
Treatment Functions and Settings
T
CPAP
X
X
X
X
X
X
X
X
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