Maquet SERVO-air, Руководство пользователя

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Note: In the minute volume configuration,
the tidal volume is determined by dividing
the minute volume by the SIMV rate.
The breath cycle time is the length of the
mandatory breath in seconds and is the same
as the duration of an SIMV period.
In SIMV, the very first breath is always a
mandatory one.
If the patient triggers a breath during the SIMV
period, the breath delivered is a mandatory
one. If the patient fails to trigger a breath
within the first 90 % of the SIMV period, a
mandatory breath is delivered.
Note: If the ventilator system is configured
for setting the inspiration time, an I:E ratio
of 1:2 will be used to estimate the breath
cycle time.
The spontaneous/Pressure Support breaths
are defined by setting the level for Pressure
Support above PEEP (PS above PEEP).
5.9.1 SIMV in detail
• This combination of controlled and
supported ventilation allows for preset
mandatory breaths that are synchronized
with the patient's breathing.
• If there is no trigger attempt within a time
window equal to 90 % of the set breath
cycle time, a mandatory breath is delivered
(the breath cycle time is the total time for
one mandatory breath).
• The mandatory breath is defined by the
basic settings (mode of ventilation, breath
cycle time, respiratory pattern and
volumes/pressures).
• The spontaneous/supported breaths are
defined by the setting for PS.
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SERVO-air Ventilator System v2.2, User's Manual
| 5 | Ventilation modes |