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OxyMag_rev26
energy source must be provided immediately. The alarm will be re-initialized when connected to a source of A.C. power or external
D.C.
Note
•
The actual remaining time will depend on the battery condition and parameters used in the ventilator.
b)
Disconnection alarm
The disconnection alarm is triggered when any kind of disconnection from the breathing circuit occurs, in order to prevent proper
ventilation to the patient. In this case, there are two criteria to check the disconnection. The first criterion is based on the measured
values of positive end-expiratory pressure (PEEP). When the airway pressure during exhalation is below the value set for PEEP,
the ventilator records the measured values and, when reaching a threshold value, triggers the disconnection alarm. The second
criterion for this alarm is based on the measured values for compliance. In this case, the alarm goes off when compliance records
a value above the maximum allowed (200 mL/cmH20) or does not identify when a variation of natural internal pressure occurs
when delivering a certain volume of air to a breathing circuit.
c)
Obstruction alarm
The obstruction alarm is triggered when there is some form of obstruction in the breathing circuit preventing full exhalation of the
patient. In the
PEDIATRIC
and
ADULT
mode, the criterion to trigger this alarm is based on the ratio of average values from PEEP
and pressure limit (Pmax). When the pressure value is above the average of the reference parameters (PEEP and Pmax), the
alarm is triggered.
In the
NEONATAL
mode, the obstruction alarm is triggered when airway pressure is above the PRESSURE SET + 5cmH2O.
When an occlusion occurs in the breathing circuit, the ventilator triggers a valve system of overpressure that releases the pressure
in the c
ircuit in order to preserve the integrity of the patient’s lungs.
d)
O
2
pressure alarm
The O
2
pressure alarm is triggered when the pressure in the oxygen network is below than 30 psi (207 kPa).
