Smiths Medical Pneupac babyPAC 100, Руководство пользователя

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504-2056A 16
9. Silencing and Muting of Electronic Audible Alarms
A visual signal, consisting of an orange light flashing every 3 seconds, is used to indicate
when an electronically generated audible alarm has been silenced. For the first 60 seconds
after switching on the ventilator (‘CMV + PEEP’ or ‘CMV + ACTIVE PEEP’ selected) all
alarms, except the single supply gas failure alarm, are automatically suspended although
high priority visual alarms will still operate. Subsequently any audible alarm can be silenced
for a 60 second period, by depressing the silencing button, but if a new alarm condition
occurs during this period it will be automatically annunciated.
If the silencing button is depressed pre-emptively, i.e. before any alarm sounds, then only a
new high priority alarm condition will cause an alarm to sound during the following 60
seconds.
If the alarm condition continues beyond the silenced period, a second depression of the
button will be interpreted as an acknowledgment by the operator that the condition is
continuous and so the audible alarm for that function is muted.
Whilst any alarm is muted the 'silenced' visual indicator provides a burst of 8 flashes once
every minute to serve as a reminder to the operator. The associated function visual indicator
always continues to indicate the specific condition for which the alarm has been muted.
7. Variable Relief Valve
This calibrated rotary control gives continuous adjustment of an independent upper patient
inflation pressure limitation device. A pneumatically operated audible alarm (25) is
provided to signal that the limitation pressure has been achieved and that gas loss is
occurring through this valve. This control should always be set above the set inspiratory
pressure but below the pressure that is considered the safe maximum for the patient being
ventilated
The pneumatically operated alarm is backed up by a high priority* electronically generated
audible and visual alarm. The electronic audible alarm only sounds after the alarm pressure
has been maintained for a period of 1.0 second in order to avoid the simultaneous sounding
of both alarms during transient pressure events. Initially the visual alarm only indicates
each time the pressure reaches the preset limit but if high pressure conditions persist the
alarm latches to give continuous flashing.
Both the audible and visual alarms reset automatically after 10 seconds when the condition
is no longer present.
8.
Cycle Indicator
During ventilation of the patient the inflation pressure is continuously monitored by a
positive pressure detector pre-set to 10 x100Pa (10 cmH
2
O). Each time the inflation
pressure rises through this set pressure level the green Cycle Indicator* flashes for 1/10
second to indicate to the user that at least this inflation pressure is being achieved each
cycle.
9. Low Inflation Pressure (Disconnect) Alarm
A medium priority* audible and visual alarm will operate to warn the user of a possible
disconnection in the ventilator breathing system or that the ventilator is not cycling correctly
if the inflation pressure generated by the ventilator does not rise through the pre-set level of
10 x100Pa (10 cmH
2
O) at least once in any 8 second period.
* See Section 8(e) & (f) for explanation of symbols & description of alarm priorities.