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Flow chart of self-test in anaesthesia ventilator (cont.)
Test blocks:
7
F
A Fresh gas occluded
8
F
A Leak > 10 L/min
9
F
A BAG/Fresh gas hose?
F
A Fresh gas occluded!
F
A Breath. syst. defective
10
End of self-test
Control pressure test
Valve and roller diaphragm
test
> 5 L/min
Subsystem 1/2 (IPPV)
Leak < 1.5 L/min at
30 mbar?
I
IPPV leakage test
Leak IPPV
[ mL ]
A
< 175
> 175
I
MAN leakage test
Subsystem 3
(breathing bag / fresh gas line)
Leak < 300 mL/min
at 20 mbar
Breathing system
Test valve function
I
Standby
A
Interface
F
A
Service 118
A
Service 119
A
Service 115
A
Valve disc defective
F
A
Roller diaphr. defective
F
A
Subsystem 1/2 leak
F
A
Valve inspection?
F
A
Subsystem 1 leak
F
A
Subsystem 2 leak
F
A
Valve inspection?
F
A
Subsystem 1 leak
F
A
Subsystem 2 leak
F
A
Subsystem 3 leak
A
Leak .... mL / min
F
A
Fresh gas occluded!
F
A
Valve inspection?
F
A
APL 30 mbar!
F
APL → Man.!
A
F
A
Subsystem 1/2 leak
F
Description
Self-test
Leak eliminated?
A
Leak accepted?
Leak eliminated?
A
Leak accepted?
165
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