10 Monitoring Carbon Dioxide Measuring EtCO
2
114
WARNING When using the Microstream EtCO
2
measurement on patients who are receiving or have recently
received anesthetics, connect exhaust tubing from the CO
2
Outlet port to a scavenging system or to the
anesthesia machine/ventilator to prevent exposing medical staff to anesthetics. Use an exhaust tube to
remove the sample gas to a scavenging system. Attach scavenging tube to the CO
2
outlet port.
NOTE Should the FilterLine or exhaust tubing be blocked when the HeartStart MRx is turned on, the CO2
Check Exhaust INOP message is displayed. Should the blockage occur during CO
2
monitoring, the
CO
2
waveform appears as a flat line, and if alarms are on, an apnea alarm is annunciated.
Measuring EtCO
2
The EtCO
2
measurement is automatically turned on when you connect a FilterLine to the CO
2
Inlet
port. The CO
2
waveform is displayed in the configured Wave Sector if available. The measurement
values for EtCO
2
and AwRR are displayed in Parameter Block 2 (see Figure 61).
Figure 61 EtCO
2
and AwRR / Parameter Block 2
EtCO
2
and AwRR Alarms
Alarms are annunciated if measurements fall outside the configured limits for high or low EtCO
2
, high
or low Airway Respiration Rate (AwRR) and Apnea time. EtCO
2
alarms are all categorized as “non-
latching” alarms, meaning they are automatically removed when their alarm condition no longer exists.
Tab le 1 4 Et C O
2
Red/Yellow Physiological Alarms
EtCO
2
and AwRR alarms are on unless you turn them off or alarms for the entire device are off. Once
disabled, alarms remain off until they are turned back on.
WARNING Turning off alarms prevents all alarms associated with EtCO
2
or AwRR measurements from
annunciating. If an alarm condition occurs, NO alarm indication will be given.
100
E
t
C
O
2
A
w
RR
mm
H
g
mm
H
g
%
mm
H
g
P
A
P
r
p
m
S
p
O
2
118/77
(95)
24/10
(15)
SYS
160
90
D
I
A
16
0
100
90
38
50
30
18
30
8
AB
P
Alarm Message Alarm Type Indicator Condition
Apnea Red
Red alarm message; alarm tone No detectable breaths for the configured
number of seconds.
EtCO
2
High Yellow
Yellow alarm message; alarm tone
The
EtCO
2
value exceeds the high alarm limit.
EtCO
2
Low Yellow
Yellow alarm message; alarm tone
The
EtCO
2
value has fallen below the low alarm
limit
AwRR High
Yellow
Yellow alarm message; alarm tone The AwRR value exceeds the high alarm limit.
AwRR Low
Yellow
Yellow alarm message; alarm tone The AwRR value has fallen below the low alarm
limit.