5.5.5 Breathing Circuit Schematic
NOTE
1. To protect the expiratory limb of the
breathing circuit, and the spirometer, use a
breathing circuit bacterial filter (4), and a
heat and moisture exchanger (6) at the
patient Y-piece.
CAUTION
Replacement/Disposal - always follow the
instructions supplied with the filter or heat
and moisture exchanger.
Always renew components at the
recommended interval.
2. Follow the instructions in the relevant user
manual for connection to analysers and
monitors.
3. Ventilator connections shown are for AV-S
with spirometry and oxygen monitor.
4. For A200SP, refer also to the user
documentation supplied with the absorber.
5.5.6 System Low Pressure Leak Test
Connect the CGO outlet on the machine to
the fresh gas inlet of the A200SP absorber.
NOTE
This machine must be fitted with a breathing
system complying with approved design
parameters, at the selection of the qualified
practitioner.
The breathing system components do not
constitute part of the machine but
connections between the machine and
breathing system should be verified as
follows:
1. Fit a patient circuit to the inspiratory
connector (1) and expiratory connector
(2) on the absorber, and a breathing
bag to the bag arm connector (3).
2. Set the bag/ventilator switch (4) on the
absorber to ‘Bag’
3. Close the adjustable pressure limiting
(APL) valve (5), and occlude the patient
connection port on the patient circuit.
Press the oxygen flush valve button on
the front of the machine briefly.
Check that the reservoir bag inflates
and the manometer (6) indicates
approximately 40 cmH
2O.
PRE-USE CHECKS
27
4. Release the oxygen flush valve.
Check that the pressure is maintained
in the system with less than 200 ml/min
fresh gas delivered into the breathing
system, showing that no leaks are
present.
5. If this test fails, check the low pressure
system on the machine (section 5.6).
If the low pressure test on the machine
is successful, check the ventilator and
absorber, referring to the relevant user
instruction manual.
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