WM 68071 05/2021
MEDUMAT Standard
2
EN 159
7 Description of the modes
The S-IPPV mode is used for volume-controlled ventilation with
a variable mandatory minute volume. Throughout the entire
expiratory phase, a trigger is active which enables the patient to
trigger a new mechanical breath. This means the patient has the
option of increasing the respiratory rate and therefore the minute
volume and adapting these to his/her needs. As a rule this mode is
used on patients who have inadequate spontaneous breathing.
Ventilation in the S-IPPV mode corresponds to ventilation in the
IPPV mode with the difference that it is possible to synchronize
ventilation with the patient's efforts to inhale. Since the setting for
the respiratory rate is lower, the patient can trigger mandatory
mechanical breaths spontaneously. A trigger window extending
throughout the expiratory time is available for this synchronization.
When the maximum ventilation pressure (pMax) is achieved, the
device maintains the pMax up until the end of the inspiration time
and then switches to expiration. As such, the set tidal volume is
possibly not fully applied if the maximum ventilation pressure
(pMax) is achieved during inspiration.
Pressure
Time
S-IPPV
pMax
1/Freq. (set)
Mechanical ventilation
Synchronized mechanical
ventilation
1/Freq. (current)
Trigger time slot
ΔT
p
Plateau
PEEP
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