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4.2.1.2 Check Pressure Control Ventilation (PCV)
NOTE
z
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.
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/mechanical ventilation switch to the mechanical ventilation position.
3. Select PCV as the ventilation mode.
4. Adjust total amount of fresh gas to 0.5 L/min.
5. Set the following combinations of Pinsp, Rate and PEEP respectively: (10 cmH2O, 15
BPM, OFF), (15 cmH2O, 12 BPM, 5 cmH2O), (20 cmH2O, 10 BPM, 8 cmH2O). Set
others to the defaults. Record the displayed Ppeak and PEEP values, and maximum and
minimum readings on the airway pressure gauge in each setting stabilized status
6. Judge if the above measured data meet the following conditions:
Pressure control and measurement are normal: the displayed Ppeak value should be
within the range of Pinsp setting ±2 cmH2O.
Circuit leak is within the acceptable range: the folding bag can reach the top of the
bellows housing each time.
Pressure measurement is normal: in one breathing cycle, the Ppeak measured value
should be close to the maximum reading on the airway pressure gauge (with error
not exceeding 2 cmH2O) and the displayed PEEP value close to the minimum
reading on the airway pressure gauge (with error not exceeding 1 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
z
If any errors are detected during PCV test, perform subsequent checks and do the
test again until the errors are corrected.
Summary of Contents for WATO EX-55
Page 1: ...WATO EX 55 65 Anesthesia Machine Service Manual ...
Page 2: ......
Page 4: ...II FOR YOUR NOTES ...
Page 6: ...IV FOR YOUR NOTES ...
Page 12: ...6 FOR YOUR NOTES ...
Page 58: ...3 22 FOR YOUR NOTES ...
Page 242: ...6 54 6 4 1 Electrical Connections Electrical Circuit Diagram ...
Page 260: ...6 72 FOR YOUR NOTES ...
Page 261: ...7 1 7 Parts 7 1 Main Unit 7 1 1 Main Unit 7 1 1 1 Exploded View ...
Page 321: ......
Page 322: ...P N 0621 20 78654 1 1 ...