Ventilator Safety Features; Behaviour During Lack Of Fresh-Gas - Dräger Fabius plus Instructions For Use Manual

Ventilator Safety Features

– High pressure safety relief valve (A)
– Negative pressure safety relief valve (B)
– Ventilator chamber pressure sensor

Behaviour during Lack of Fresh-Gas

Background
Due to a very low fresh-gas flow or an excessive
leakage in the breathing system, a lack of fresh gas
can occur. This can be recognised by observing the
gradual emptying breathing bag.
NOTE
The user should then take action to resolve this, for
example by increasing the fresh-gas flow.
Fabius plus behaviour in case of no action
taken by the user
– breathing bag gradually empties completely
– after two more strokes the alarm »FRESH GAS
LOW« and additional alarms occurs
– the ventilator absorbs its reserve volume since
it is not supplied with sufficient fresh gas.
As long as a lack of fresh gas exists, the safety
valve (B) for ambient air is opened during expira-
tion.
CAUTION
If remedial actions are omitted, ambient air will be
taken in which will dilute the fresh gas.
The concentration of (e.g.) oxygen or other
anesthetic gases will decrease.
Advantages: Even in extreme cases emergency
ventilation with limited V
shutdown of the ventilator does not occur.
Instructions for Use Fabius plus SW 3.n
is possible. A "sudden"
T
Operation
A B
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