Displaying and Monitoring the ECG
44
Marquette Responder® 3000
227 490 02-C
Warning
-
No Asystole Alarm — The defibrillator gives
asystole alarm only when the heart rate falls
below the low HR limit. Therefore, do not dis-
able the low HR limit.
-
Incorrect HR / No HR Alarm — In the pres-
ence of arrhythmias and morphological
changes of the ECG, the device may not be
able to calculate the correct heart rate. Beats
may be counted twice or may be ignored.
Note
-
The defibrillator can be set up to automati-
cally activate the alarm tone on power up. The
default alarm limits can also be adjusted in
the setup menu.
-
Furthermore the defibrillator can be set up for
continuous ECG analysis. If the algorithm
identifies shockable arrhythmias, the defibril-
lator will display the message "Check Patient"
(manual defibrillator) or "Press Analyse"
(semiautomatic defibrillator). When the audio
alarms are active, the device will also emit an
audible signal.
During patient transport the device may fail to
identify these arrhythmias due to motion arti-
fact.
High
ECG
ECG
I
II
III
15.07.1998 09:05:00
160 / 40
bpm
Alarm
Alarm
Low
ECG
Previous
Menu
semiautom.
91
Figure 7-5.
Buttons for modification of the HR
alarm limits
Monitoring Heart Rate
The default heart limits are 40 and 160 bpm and
the audio alarm is disabled (factory default
settings, bell symbol in button F4 is crossed out
). The audio alarm can be enabled permanently
from the setup menu or temporarily with F4
(symbol
appears).
The defibrillator reports an alarm condition if the
HR exceeds one of the alarm limits for more than
10 seconds:
−
the HR window and the QRS indicator change
from green to red,
−
the audio alarm sounds (configurable),
−
the recorder starts (configurable),
−
the alarm is annotated in the full disclosure
ECG.
When the parameter reading returns to the normal
range, the window and the QRS indicator change
back to green and the audio alarm stops.
You can also silence the alarm tone with F4
. If
the alarm cause persists, the alarm condition is
reported again after 120 s (a count-down timer in
the button indicates the remaining time in
seconds).
To permanently disable the audio alarm, press the
button longer than 2 seconds. Then the symbol
reappears.
The alarm limits can be modified permanently
from the setup menu or temporarily as described
below:
•
Press F1
ECG
.
•
Press F3
Alarm Limits
.
The display shown in Figure 7-5 will appear.
•
Change the high limit with F1/F2 and the low
limit with F3/F4.
