Alarm settings and conditions
118
Circuit configuration alarms
Alarm
Activates when
Alarm setting
Incorrect circuit
attached
The circuit connected to the ventilator differs from the
circuit type setting.
N/A
Incorrect circuit
adapter
A single limb circuit with intentional leak or mouthpiece
circuit is attached to the ventilator but an incorrect adapter
has been fitted.
N/A
Pressure line
disconnected
A single limb circuit with expiratory valve is attached but
the proximal pressure line is disconnected.
N/A
Disconnection alarm
The disconnection alarm monitors multiple parameters to assess whether the ventilator breathing circuit
has become disconnected from the patient.
Note:
This alarm should be configured in conjunction with other alarms that can be used to detect circuit
disconnection. Refer to the Detecting circuit disconnection and de-cannulation (see page 121) section.
Alarm
Activates when
Alarm setting
Disconnection alarm
The degree of circuit disconnection exceeds a configurable
Disconnection Tolerance threshold continuously over a
given time period. The alarm will be cleared automatically
if the circuit disconnection is resolved.
The alarm will not activate if patient expiratory effort is
detected, indicated by the symbol below the measured
Disconnection value.
5% (low tolerance to disconnection /
leak from the circuit) to 95% (high
tolerance to disconnection / leak from
the circuit)
Note:
The alarm can be turned off when a mouthpiece interface is selected or a mask interface is selected while a single limb
with intentional leak circuit is in use.
CAUTION
Be certain that all forms of patient disconnection can be successfully detected, including the
patient interface (mask / cannula / endotracheal tube / mouthpiece) detaching from the patient.
Refer to Testing the disconnection alarm on page 113.
Oxygen alarms
High and low FiO
2
alarms are only available when an oxygen sensor is installed. The absence at the start
of ventilation, or loss during ventilation, of oxygen monitoring is indicated by the No FiO
2
alarm.
Alarm
Activates when
Alarm setting (FiO
2
%)
Low FiO
2
Measured oxygen is less than FiO
2
for a continuous period
of 30 seconds.
Off, 18 to 99 [18]
High FiO
2
Measured oxygen is greater than FiO
2
for a continuous
period of 30 seconds.
Off, 19 to 100 [70]
No FiO
2
monitoring
FiO
2
alarms are on, and the connected O
2
sensor is not
operating or calibrated correctly.
N/A
Summary of Contents for Astral 100
Page 1: ...Clinical guide English ...
