Bedfont NOxBOX mobile, Техническое руководство

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8.3 Alarm Priority- Alarms during therapy
The below are a series of alarms which may be seen during therapy (once the device has been
setup) if an issue is detected with the NOxBOX
i
.
Alarm Priority Possible Cause Recommended Action
NO Low Monitored levels of NO gas
being delivered to the patient have
dropped below the alarm setting
boundary. NOxBOXi delivery system
cannot mainatin correct dose setting.
Check sample line is correctly attached to ventilator
circuit and NOxBOX
i
water trap inlet.
Check Sample line for blockages.
Check water trap (including barrel thread) for
damage and/or leaks.
Check no ventilator circuit breaks or leakages have
occurred.
Check supply cylinder is connected, open; there are
no leaks and the concentration matches the system
setting.
Check correct orientation of NOxFLOW.
Check NOxFLOW dose line and
connection is connected and there are no
blockages or leaks.
Check NOxFLOW flow detection lines and
connection (including O rings) are connected and
there are no blockages or leaks.
The ventilator minute volume may be
too low.
Check ventilator minute volume (see section 3.2 for
flow ranges), you may need to increase the
ventilator bias flow.
The NO low alarm may be
inappropriately set by user.
Check NO low alarm value and reduce value if
ventilator settings deem necessary.
The NO sensor may require
replacing.
If another system is not readily available and patient
requires therapy, engage the manual override
mode, replace the system as soon as practically
possible and alert the Service Engineer.
NO High Monitored levels of NO gas being
delivered to the patient have risen
above the alarm setting boundary.
NOxBOX
i
delivery system cannot
maintain the correct dose setting.
Check supply cylinder concentration matched the
system settings. If possible, change the NO supply
cylinder for the correct concentration. If not, call
Service Engineer to resolve.
Check no ventilator circuit break/leakage has
occured that may cause build-up of NO
concentration due to lack of ventilator flow.
Check correct orientation of NOxFLOW
Check NOxFLOW connection (and O rings) to
NOxBOX
i
.
The NO high alarm may be
inappropriately set by user.
Check NO high alarm value and increase value if
ventilator settings deem necessary.
The NO sensor may require
replacing.
If another system is not readily available and patient
requires therapy, engage the manual override
mode, replace the system as soon as practically
possible and alert the Service Engineer.
NO
2
High
Monitored levels of NO gas being
delivered to the patient have risen
above the alarm setting boundary.
High NO dose settings on low ventilator flows with
High O
2
content may cause higher NO
2
build-up
than expected. Increase ventilator bias flow to help
reduce stagnation in delivery.