Synchronized Intermittent Mandatory Ventilation (Simv) - Dräger Babylog 8000 plus Instructions For Use Manual

Synchronized Intermittent Mandatory Ventilation (SIMV)

SIMV combines synchronised ventilation with spontaneous
breathing. In contrast to SIPPV, support is not provided for
each spontaneous inspiration, but only for a sufficient number
to ensure that ventilation is executed with the set frequency.
Between the ventilation strokes, the patient can breathe
spontaneously, but receives no support from the ventilator.
In each time interval with the length T
neous inspiration triggers a ventilation stroke with the length T
Any further spontaneous inspiration during this period is
ignored. The ventilation strokes thus have the irregular rhythm
of spontaneous breathing, but their average frequency is the
same as the set frequency value.
Triggering is carried out in the same way as for SIPPV.
The shape of the ventilation stroke is adjusted as for
IPPV/IMV.
In SIMV mode, the ventilation frequency can be adjusted just
as in IPPV/IMV mode. Triggered mandatory ventilation strokes
alternate with spontaneous-breathing phases without support,
during which the patient must do all the breathing work.
By extending T , it is thus possible to transfer an increasing
E
proportion of the total breathing work from the ventilator to
the patient.
If the patient stops breathing, ventilation in IPPV/IMV mode is
started.
SIMV is suitable for patients with sufficient spontaneous
breathing. Weaning can be carried out by gradually increasing
T and lowering the inspiratory pressure.
E
+T , the first sponta-
I E
.
I
Paw
P
insp
PEEP
TI
Flow
Vtrig
Description
Ventilation mode
t
t
Vtrig
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