4-20
c. Occlusion can occur after the filter is used for a long time. Replace the filter and do
the test again.
6. If the negative pressure suction device is without Venturi, step 1 and step 3 is no need.
4.11 Breathing Circuit Tests
4.11.1 Check Valve Test
WARNING
Objects in the breathing circuit 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 circuit. Make sure that there are no test plugs or other objects in the
breathing circuit.
Do not use a test plug that is small enough to fall into the breathing circuit.
1. Make sure that the breathing circuit is correctly connected and not damaged.
2. Make sure that the check valves in the breathing circuit work correctly:
The inspiratory check valve opens during inspiration and closes at the end of
inspiration, and remains closed during expiration.
The expiratory check valve opens during expiration and closes at the end of
expiration, and remains closed during inspiration.
To Next Page
Loading...
