OPRHT70 A0310
6-2
6
Ventilator Alarms
Alarm Indicators
When an alarm limit is violated:
1. The message area changes color according to alarm priority
and an alarm message is displayed.
2. The alarm LEDs in the handle of the HT70 flash.
3. The alarm parameter button on the Alarms Screen (if it is an
adjustable alarm) is highlighted.
4. An audible alarm sounds.
When the violation is no longer in effect, the alarm message latches
(remains steadily visible) until it is reset by pressing the Alarm
Silence/Reset button.
Alarm Silence/Reset button
Press this button to silence the audible alarm for one minute (60
sec). Once an alarm condition is corrected, press this button to
clear (reset) the alarm message. Press repeatedly to clear multiple
messages.
WARNING Failure to identify and correct alarm violations may result
in patient injury.
Alarm Silence LED
Located next to Alarm Silence/Reset button, the LED remains lit
during the one minute alarm silence period.
User Adjustable Alarms
#P (High Pressure) # Min Vol (High Inspiratory Minute
Volume)
$P (Low Pressure) $ Min Vol (Low Inspiratory Minute
Volume)
#RR (High Respiratory Rate) #Fi02 (optional) (High Oxygen
Concentration)
Apnea (time adjustment) $Fi02 (optional) (Low Oxygen
Concentration)
The HT70 Ventilator monitors the volume of gas output from the
ventilator, therefore the high and low inspiratory minute volume
alarms respond to changes in delivered, not exhaled volumes. Use
the High Inspiratory Minute Volume Alarm (#Min Vol ) to detect leaks
or disconnects while using pressure controlled ventilation and use
the Low Pressure Alarm ($P) to detect circuit leaks or disconnect
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