6-9
NOTE
z Do not perform test on the vaporizer when the concentration control is between
“OFF” and the first graduation above “0” (zero) as the amount of anesthetic drug
outputted is very small within this range.
6.8 Breathing System Tests
WARNING
z Objects in the breathing system can stop gas flow to the patient. This can cause
injury or death. Make sure that there are no test plugs or other objects in the
breathing system.
z Do not use a test plug that is small enough to fall into the breathing system.
1. Make sure that the breathing system is correctly connected and not damaged.
2. Make sure that the check valves in the breathing system work correctly:
The inspiratory check valve opens during inspiration and closes at the start of
expiration.
The expiratory check valve opens during expiration and closes at the start of
inspiration.
6.8.1 Bellows Test
1. Set the system to Standby.
2. Set the bag/mechanical ventilation switch to the mechanical ventilation position.
3. Set all flow controls to minimum.
4. Close the breathing system at the patient connection.
5. Push the O
2
flush button to fill the bellows, folding bag rising to the top.
6. Make sure that the pressure must not increase to more than 15 cmH
2
O on the airway
pressure gauge.
7. The folding bag should not fall. If it falls, it has a leak. You need to reinstall the bellows.
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