Alarms
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9650-002360-01 Rev. A
Popup Messages
As described in Chapter 4, popup messages are used to help the user make alarm adjustments
and prevent unintended adjustment of the device. See Chapter 4 for a list of popup messages.
Alarm Types
Alarm types are identified to provide a framework for the alarm scheme and titles. The alarm
indication may be due to patient conditions, breathing circuit conditions, device conditions, or
environment. For a list of all alarms, with descriptions of ventilator behavior and mitigation
actions see Alarm Summary section later in this chapter.
The alarm types are:
•
Patient Safety — address the ventilation of the patient and their respiratory effort. Patient
Safety alarm types also includes: pulse oximetry monitoring and circuit/exhalation valve
issues.
•
Environmental and Use — address the device inputs: external power, battery, high pressure
O
2
supply, and the fresh gas intake. Environmental and Use alarm types also includes:
ambient and device temperature, barometric pressure, and altitude.
•
Self Check — address the performance of the device systems and include:
•
Internal Communication (Comm): faults/failures of inter-device communication,
cyclic redundancy checking, or processor-related issues
•
Pneumatic Sensor: faults/failures of the pneumotachographs that measure gas flow
or the pressure transducers.
•
Pneumatic System: faults/failures of the compressor or O
2
supply valve.
•
Power System: faults/failures of the power system that render the device unable to
operate from external power or charge/operate from the internal rechargeable
battery.
•
Pulse Oximeter Module: faults/failures of the pulse oximeter module that are not
related to monitoring of the patient, a fault or failure of the module.
•
Preventive Maintenance: alarms that occur when device is due for preventive
maintenance.
Patient Safety Alarms
The ventilation mode determines whether parameters are controlled by the user. As a result, the
alarms monitoring the patient safety behave differently based on the ventilation mode. Patient
safety alarms may be muted or turned off if the use determines this is appropriate for the
management of the patient.
Note:
Popup messages are used to prevent inadvertent setting of alarm limits at their extreme
which could limit the effectiveness of the alarm.
The table below lists alarms related to patient safety, describes default settings and adjustable
ranges in different ventilation modes and provides the Service Code number for each alarm.
