Breas Vivo 45 LS User Manual page 75

5.4.4.9 VCV – Volume Controlled Ventilation
In the VCV mode the ventilation is controlled by the Vivo 45 LS. This is done with the
preset tidal volume, breath rate, inspiratory time, and rise time settings set by the
operator.
The inspiration stops and an expiration starts in two cases:
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5.4.4.10 VCV(A) – Assisted Volume Controlled Ventilation
In the VCV(A) mode the ventilation is controlled by the Vivo 45 LS, but the patient has
the possibility to start a breath through the inspiratory trigger. This patient triggered
breath will be delivered with the inspiratory time, rise time and tidal volume setting set
by the operator.
5.4.4.11 VCV-SIMV – Volume Controlled Ventilation with Synchronized
Intermittent Mandatory Ventilation
In the VCV-SIMV mode, the Vivo 45 LS synchronizes mandatory volume-controlled
breaths with the patient's breathing efforts.
In this mode, the ventilator delivers mandatory volume-controlled breaths with a preset
breath frequency defined as the SIMV Rate. The SIMV Rate setting determines the
length of the SIMV cycle.
For each SIMV cycle, there is an initial mandatory period in which the patient may trig-
ger one mandatory breath. This mandatory period is always 80% of the SIMV cycle time.
If the patient does not trigger a breath during this period, the ventilator will deliver one
mandatory breath automatically in the end of the period.
Between the mandatory breaths, the patient may trigger spontaneous breaths until the
next SIMV cycle begins. The ventilator will respond to the patient's inspiration efforts
with additional pressure support breaths. The inspiratory pressure of these support
breaths is defined by the SIMV Support Pressure, together with the settings for Rise
Time and Expiratory Trigger. The default value for SIMV Support Pressure is the
Inspiratory pressure set in PCV or PSV.
After a mandatory breath, Vivo 45 LS will always wait at least one second before a new
mandatory breath can be initiated in the following SIMV cycle.
5.4.4.12 VCV-MPV– Volume Controlled Ventilation with Mouth-Piece Ventilation
The VCV-MPV mode is tailored specifically for those patients that use a mouthpiece
interface together with volume controlled ventilation.
Mouthpiece ventilation is intended for adult patients who are able to initiate breaths
with the mouthpiece circuit.
Doc. 007301 K-1
The inspiratory time expires.
The limit for the high pressure alarm is reached.
How to Use the Vivo 45 LS
User manual
75