Mindray A5 - Alarm Tests; Prepare for Alarm Tests; Test the O 2 Concentration Monitoring and Alarms

Alarm Tests Preoperative Tests
4 - 26 046-003777-00 A5/A3™ Operating Instructions
4.14 Alarm Tests
Alarms also can be verified by creating an alarm condition on the A5/A3 and verifying the
corresponding alarm indicators are present on the monitor.
4.14.1 Prepare for Alarm Tests
1. Connect a test lung or manual bag to the Y-piece of the breathing circuit.
2. Set the Auto/Manual switch to Auto.
3. Set the system switch to the ON position.
4. Set the system to Standby mode.
5. Set the Patient Size to Adult.
6. Set the ventilator controls as follows:
• Ventilation mode: select VCV
• Vt: 500 ml
• Rate: 12 bpm
• I:E: 1:2
•Tpause: 10%
•PEEP: OFF
• Plimit: 30 cmH
2
O
7. Turn the O
2
flow control to set the O
2
flow to 0.5 to 1 L/min.
8. Push the O
2
flush button to expand the bellows to the top of the bellow enclosure.
9. Touch the screen to exit Standby mode and begin ventilation.
10. Ensure that:
• The main screen displays the correctly set data. The measured values should be within the
tolerances specified in the specifications (see
TABLE9-28, “Control and Monitoring
Accuracy,” on page9-20).
• The bellows inflates and deflates normally during mechanical ventilation.
4.14.2 Test the O
2
Concentration Monitoring and Alarms
NOTE: For A5s with an installed gas module, disconnect the sample tube from
the Y-piece and breathe into it until you see a CO
2
reading on the
screen. Then reconnect the sample tube to the Y-piece. This will activate
the gas module alarms.
1. Set the Auto/Manual switch to Manual.
2. Remove the O
2
sensor. After three minutes, ensure that the sensor measures approximately
21 % O
2
in room air by verifying the FiO
2
value on the main screen.
3. Select the Alarms softkey and then the Limits tab. Set the FiO
2
low alarm limit to 50 %.
4. Ensure that a low O
2
alarm (“FiO
2
Too Low”) occurs.
5. Set the FiO
2
low alarm limit back to a value less than the measured O
2
value and ensure that
the alarm cancels.
6. Put the O
2
sensor back in the breathing system.
7. Select the Alarms softkey and then the Limits tab. Set the FiO
2
high alarm limit to 50 %.