Using the ventilator 29
The patient valve is designed to enable spontaneous
breathing in case of equipment failure.
When is the alarm set off?
An alarm signal is given as soon as any one of the
aforementioned functional failures occurs. The rele-
vant LED starts to flash and an acoustic signal
sounds.
Simultaneous disconnection and drop in oxygen
pressure will initially set off only the < 2,7 bar O
2
alarm.
Stenosis alarm
Actual ventilation pressure exceeds the level set with
regulator knob max. ventilation pressure.
Up to Serial No. 7699 MEDUMAT Standard switches to expiration immedi-
ately if the maximum ventilation pressure is exceeded.
This does not affect the set frequency. Old appliances
(up to serial no.7699) that have been given a new
board in the course of repairs or servicing behave in
the same way as appliances from serial no. 7700 on-
wards.
From Serial No. 7700 MEDUMAT Standard briefly switches to expiration
whenever the maximum ventilation pressure is ex-
ceeded but tries to continue inspiration in the same
inspiration phase.
If the maximum ventilation pressure is exceeded for
a second time during the same inspiration phase, the
device finally switches to expiration and vents the
patient tube system completely. The next inspiration
starts with the following ventilation stroke according
to the frequency selected. The frequency is not
affected.
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