Trigger Function - Dräger Babylog 8000 plus Instructions For Use Manual

Description
Monitoring functions

Trigger function

The Babylog 8000 plus detects spontaneous breathing by
measuring the flow. When the patient attempts to breath in, the
flow signal, which was until then zero or negative
(= expiration), starts to rise. In order to reliably detect inspira-
tion, and to avoid triggering a ventilation stroke as the result of
interference signals, the patient must first breathe in a certain
volume V . This volume is set as the trigger sensitivity on a
trig
scale from 1 to 10 in the menu, where 1 is the highest and 10 is
the lowest sensitivity. The diagram on the right shows the rela-
tionship between the sensitivity and the trigger volume V
At the maximum sensitivity, V
needs to reach only the minimum value of 0.2 L/min in order to
trigger a stroke. However, it is possible for strokes to be trig-
gered by artefacts at this setting. If self-triggering occurs, the
sensitivity should be reduced.
With decreasing sensitivity, the delay between the sponta-
neous inspiration and the ventilation stroke increases. This
delay may not be so long that the inspiration stroke hinders the
spontaneous expiration, since the patient would then have to
"fight" the ventilator. The best sensitivity is thus always
a compromise between the shortest possible trigger delay
and the reliable protection against self-triggering.
126
= 0 and the inspiratory flow
trig
.
trig
3.0
2.5
2.0
V
trig
[mL]
1.5
1.0
0.5
0.0
1 2 3 4 5 6 7
Trigger Sensitivity
8 9 10