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To diagnose the sampling line connection of the pressure sensor:
During normal ventilation, if a sampling line connection error occurs, it is easily
detected through the Paw waveform and technical alarms.
If with the increase of actual pressure, pressure waveform data decreases and the
alarm of “Paw Too Low” or “Patient Circuit Leak” occurs simultaneously, it is
possible that the sampling line of the airway pressure sensor is connected
incorrectly.
If from system standy to mechanical ventilation, continuous clicks are heard and
the alarm of “Pressure Monitoring Channel Failure” occurs, it is possible that the
sampling line of the PEEP pressure sensor is connected incorrectly. You can enter
the [Valves-Test Tool] menu to set the PEEP safety valve to ON. Gradullay
increase the D/A value of the PEEP valve and observe if the A/D value of the
PEEP pressure sensor also increases gradually. If not, it further indicates that the
PEEP pressure sensor may be connected incorrectly.
To diagnose the sampling line connection of the pressure sensor in case of pressure
calibration failure:
1. Connect the tubes of the anesthesia machine following the constant-pressure
connection method. Refer to 5.4.1Preparations before Using the Valves-test Tool.
2. Make sure that gas supplies are normal. In the [Valves-Test Tool] menu, set the PEEP
safety valve to ON.
3. Increase the D/A value of the PEEP valve gradually and the A/D value of the pressure
sensor should also increase. With the gradual increase of actual pressure,
If the A/D value of one sensor decreases gradually, it is possible that the sampling
line of the sensor is connected incorrectly.
If the A/D value of one sensor keeps unchanged, it is possible that the sampling
line of the sensor is not connected.
4. If sampling line connection errors are detected, re-connect the sampling lines and
check their connection correctness.
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