Section 5 - Operation
Breathing Pressure Monitoring
In five seconds, the highlighting box disappears and the new value is
saved as the pressure high alarm limit.
Setting the
Threshold Pressure
Alarm Limit
The threshold pressure alarm limit is automatically set to 12 cmH
2
Oat
power-up. You can change the threshold pressure alarm limit to any
value within the range of 5–30 cmH
2
O.
WARNING: The threshold pressure alarm limit should be as close
as possible to the sensed peak pressure without
exceeding it. For details, see the following “Threshold
Limit Guidelines” and “Sample Threshold Limit
Settings.”
To change the threshold pressure alarm limit, follow these steps:
1. Press the threshold pressure alarm limit key (shown above-left).
A box is drawn around the threshold pressure alarm limit.
2. Press the increment (up arrow) or decrement (down arrow) key to
increase or decrease the threshold pressure alarm limit.
If you do not press a key within five seconds, the highlighting box
disappears. To begin again, return to step 1.
3. To save the new value, simply stop pressing keys.
In five seconds, the highlighting box disappears and the new value is
saved as the threshold pressure alarm limit.
Threshold
Limit
Guidelines
If a breathing system leak or partial disconnection occurs when the
threshold pressure alarm limit is set significantly lower than the peak
pressure, continued positive pressure ventilation can produce a pressure
fluctuation great enough to exceed the threshold (and thereby satisfy the
alarm), yet not great enough to provide adequate ventilation.
To address the problem, the Advisory message THRESHOLD LO appears
on the central alarm display under the following conditions:
• When the sensed peak pressure exceeds the set threshold by more
than 6 cmH
2
O at threshold pressure alarm limit settings of
5–20 cmH
2
O.
• When the sensed peak pressure exceeds the set threshold by more
than 8 cmH
2
O at threshold pressure alarm limit settings of
21–29 cmH
2
O.
5-12-7
To Next Page
Loading...
