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TV control and measurement are normal: the displayed TVe value should be within
the range of TV setting X (1±10%) ml.
Circuit leak is within the acceptable range: the folding bag can reach the top of the
bellows housing each time and the lowest graduation on the bellows housing which
the bag falls to each time corresponds to approximately TV setting.
Pressure measurement is normal: the Ppeak measured value is close to the peak
pressure reading on the airway pressure gauge. The error should not exceed 2
cmH2O.
No other ventilation failure occurs: the Paw and flow waveforms are displayed
normally and no technical alarms occur.
If the above test requirements are not met, perform subsequent checks and do the test again.
NOTE
If any errors are detected during VCV test, perform troubleshooting as per 5
Troubleshooting and do the test again until the system is normal.
6.6.1.2 Check Pressure Control Ventilation (PCV)
NOTE
PCV is one of the basic mechanical ventilation modes of the anesthesia machine.
PCV is configured depending on the user’s selection and machine type. If the
anesthesia machine under test is not configured with this mode, this test is not
required.
Checking pressure control ventilation is to check:
If the machine can provide pressure control ventilation normally, including pressure
control, feedback and measurement;
If the tidal volume and bellows scale measurements are normal;
The working status of the bellows assembly;
If the machine has obvious leaks;
If the fresh gas compensation is normal;
If the machine has ventilation failure alarm.
To check PCV:
1. Make sure that the supply pressure is normal and that the tubes in the breathing circuit
are correctly connected as required for mechanical ventilation. Connect a 2 L bag, which
is used as the test lung, to the Y piece in the patient circuit.
2. Set the bag/vent switch to the mechanical ventilation position.
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