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Oxylog 1000
Function Description
3.4.5
Stenosis Alarm
The stenosis alarm (Paw high) warns of a high airway pressure in the patient
branch. The stenosis alarm is triggered under the following conditions:
–
The patient's airways are blocked
–
The ventilation hose is kinked
–
The lung compliance is reduced
–
The patient "fights" the ventilator
If the ventilation pressure is equal to or higher than 10 mbar, but the alarm
limit (30 mbar to 60 mbar) is pre-set lower, the 3/2-way valve (DMR8) is not
triggered. The 3/2-way valves (DMR12 and DMR13) vent through the 3/2-
way valve (DMR8).
If the ventilation pressure exceeds the pre-set alarm limit, the 3/2-way valve
(DMR8) activates the 3/2-way valves (DMR12 and DMR13). The 3/2-way
valve (DMR13) activates the “Paw high” indicator (Z3) and the 3/2-way valve
(DMR14) activates the alarm generator (L1). At the same time the 3/2-way
valve (DMR8) switches the 3/2-way valve (DMR18). The vent valve (EV)
opens the supply gas path to atmosphere. This condition persists until the
next inspiratory phase.
Figure 7
Flow chart of the Oxylog 1000: Stenosis alarm
DMR8
DMR12
DMR13
Z3
DMR14
EV
DMR18
L1
Содержание Oxylog 1000
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