Breas VIVO 65 User Manual page 70

VCV-SIMV – Volume Controlled Ventilation with Synchronized Intermittent
Mandatory Ventilation
In the VCV-SIMV mode, the Vivo 65 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 trigger
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 manda-
tory 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 addi-
tional 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.
VCV-MPV – Volume Controlled Ventilation with MouthPiece Ventilation
The VCV-MPV mode is tailored specifically for those patients that uses mouthpiece inter-
face together with volume controlled ventilation.
In MPV breath mode it is possible to set Breath Rate to zero so that breaths are only initi-
ated when the patient triggers them using the mouthpiece. PEEP setting is not available
but always set to Off so that no air blows from the mouthpiece when no breaths are
delivered.
As the patient is not always connected to the ventilator several of the surveillance functions
are not working in the same way as in other modes:
• Disconnection alarm is not available in MPV mode.
• Low Pressure alarm is only active during breaths.
• Apnea alarm is possible to set to longer times and is an important mean of surveillance
to make sure that the patient gets ventilation support regularly.
When switching to MPV mode all alarms, except from High/Low Pressure Alarms, are
automatically switched off to avoid false alarm triggering (when changing between profiles
the alarm settings does not change to Off, but stays as defined in the profiles)
WARNING!
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CPAP – Continuous Positive Airway Pressure
In CPAP mode the ventilator is applying a continuous positive pressure to the airways. The
flow will automatically be adjusted to maintain the set CPAP level. CPAP mode can only be
used when a leakage circuit is selected.
68 How to Use the Vivo 65
User manual
The alarm levels must be assessed and adjusted considering the patients condition
and treatment settings.
MPV breath mode shall be used with a mouthpiece interface only.
MPV breath mode shall not be used with ventilator dependent patients.
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