Alarms, messages, and troubleshooting
9-11
Power has been re-
stored
Power is restored follow-
ing loss of power. The ven-
tilator restarts and
continues ventilation in
the mode set before power
was lost.
Check the patient. Con-
firm ventilator and alarm
settings are appropriate.
Infor-
mation
(66)
Yes N/A N/A
PPV Maximum Pres-
sure
Computed target pressure
is greater than the PPV
maximum pressure alarm
limit. Possible causes are
excessive patient inspira-
tory effort; a significant
change in the leak around
the patient interface; or
high PPV %, Max E, or Max
R setting. Target pressure
is limited.
At first, an information
message. If condition per-
sists for three consecu-
tive PPV inspirations, this
escalates to a high-priority
alarm.
Check the patient. Con-
firm ventilator and alarm
settings are appropriate.
Check for circuit or mask
leaks. If problem persists,
provide alternative ventila-
tion. Have the ventilator
serviced.
Infor-
mation/
High
(51)
Yes Yes Yes
PPV Maximum Vol-
ume
Estimated delivered pa-
tient tidal volume is great-
er than the PPV maximum
volume alarm limit. Possi-
ble causes are excessive
patient inspiratory effort;
a significant change in the
leak around the patient in-
terface; or high PPV %,
Max E, or Max R setting.
Ventilator cycles to exha-
lation.
At first, an information
message. If condition per-
sists for three consecu-
tive PPV inspirations, this
escalates to a high-priority
alarm.
Check the patient. Con-
firm ventilator and alarm
settings are appropriate.
Check for circuit or mask
leaks. If problem persists,
provide alternative ventila-
tion. Have the ventilator
serviced.
Infor-
mation/
High
(50)
Yes Yes Yes
Pressure Regulation
High
Pressures exceed ventila-
tor-defined thresholds for
IPAP, EPAP, or both. Ven-
tilation continues. Autore-
sets when alarm condition
removed; otherwise, tran-
sitions to the ventilator in-
operative state if pressure
continues to rise.
Check the patient. Con-
firm ventilator and alarm
settings are appropriate. If
problem persists, provide
alternative ventilation.
Have the ventilator ser-
viced.
High
(44)
Yes Yes Yes
Table 9-3: Alarm and other messages: summary and troubleshooting (continued)
Message Description Corrective Action
Priority
type (ID)
Manually
resettable
Autores
ettable
Silence
able