AS3000™ Service Manual 0070-10-0683 6 - 31
Periodic Maintenance Functional Tests
6.8.7.9 Pressure Support (PS) Ventilation Mode Test
1. Attach a breathing circuit and breathing bag.
NOTE: For testing purposes always use a reusable breathing
circuit.
2. Attach an adult test lung to the Y-fitting of the breathing circuit.
3. Attach a Vent Tester between the EXP port and the expiratory hose.
4. Set the O
2
flow to 1 L/min and set the N
2
O and AIR flow rates to minimum flow.
5. Set the ventilator controls to:
6. Select PS to begin ventilation.
7. Begin triggering breaths by slightly squeezing the test lung and releasing. Maintain a
continuous breath rate.
8. Verify that a pressure waveform and all ventilation parameters appear on the screen.
9. Verify that the Peak Pressure reading on the display is ±4 the value of P + PEEP.
10. Stop triggering breaths.
11. Verify that after 30 seconds the ventilator delivers a breath and displays the message
APNEA BACKUP.
12. Verify the system ventilates with a frequency of 2 bpm
VENTILATOR CONTROLS VENTILATOR SETTINGS
Vent Dial Patient Type Adult
Vent Mode Ventilation Mode PS
Differential Pressure - P 20
PEEP - PEEP Off
Flow Trigger - Trigger 3
Inspiratory Slope - T
slope
0.5
Minimum frequency - freq
MIN
2
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