Mindray WATO EX-55Pro, Service Manual

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10. Verify that the tidal volume displayed on the anesthesia machine is within 7% (±42 mL)
of the set value within approximately the first 1 minute after ventilation starts.
11. Verify that the measured O2 concentration is at least 97% after 5 minutes
12. Set the air flow to 3 L/min and disable the O2 flow rates.
13. Verify that the measured O2 concentration is 21% ±3% (volume fraction) after 5
minutes.
4.13.4 VCV Child 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-piece of the breathing circuit.
NOTE

Limit the volume in the test lung to provide sufficient airway pressure to satisfy the
Low Peak Pressure alarm. Or set the peak pressure alarm limit to a smaller value
to prevent the alarm when an adult test lung is used.
3. Attach a ventilation tester between the expiratory port and the breathing hose.
4. Select Air in [Balance Gas] and single-tube flow in [Fresh Gas Control]. Set the O2 flow
to 2 L/min and set the N2O and air flow rates to the minimum value.
5. Set breathing parameters under standby mode.
Parameter Setting
Patient Size
Child
Ventilation Mode
VCV
Vt 120
Rate 15
I:E 1:2
Tpause 10
PEEP Off
Plimit 40
6. Press the [Set Mode] button to exit standby mode and begin ventilation.
7. Verify that the pressure waveform, respiratory capacity, mean or plateau pressure,
respiratory rate, and minute ventilation appear on the screen.
8. Verify that the displayed tidal volume is within 15 mL of the set value within
approximately the first 1 minute after ventilation starts.
9. Verify that the tidal volume, measured by a ventilation tester at the expiratory port, is
within 15 mL of the set value within approximately the first 1 minute after ventilation
starts.
4.13.5 Air Way Disconnection Alarm Test
1. Disconnect the expiratory limb from the expiratory port of breathing system when the
ventilator is working.
2. Ensure the following alarms appear:

A low Paw alarm appears on the screen
 Alarm sounds