Physio Control LIFEPAK 15, Operating Instructions Manual

Page: 91 / 284

Chapter 4 | Monitoring
©2007-2015 Physio-Control, Inc. LIFEPAK 15 Monitor/Defibrillator Operating Instructions
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CO2 Display
The following scales are available to display the CO
2
waveform. The
LIFEPAK 15 monitor/defibrillator automatically selects the scale based on the measured
EtCO
2
value. To change the CO
2
scale, outline and select the CO
2
area using the
SPEED DIAL
and
then select the desired scale from the scale menu.
• Autoscale (default)
•
0–20 mmHg (0–4 Vol% or kPa)
• 0–50 mmHg (0–7 Vol% or kPa)
•
0–100 mmHg (0–14 Vol% or kPa)
The CO
2
waveform is compressed (displayed at 12.5 mm/sec sweep speed) to provide more
data in the 4-second screen. There is a slight delay between when the breath occurs and when it
appears on the screen. Printouts are at 25 mm/sec. Continuous print may be changed
to 12.5 mm/sec, if desired.
The monitor shows the maximum CO
2
value over the last 20 seconds. If the EtCO
2
values are
increasing, the change can be seen with every breath. However, if the values are continually
decreasing, it will take up to 20 seconds for a lower numerical value to be displayed. Because of
this, the EtCO
2
value may not always match the level of the CO
2
waveform.
CO2 Alarms
The EtCO
2
monitor provides:
• EtCO
2
high and low alarms controlled by activating
ALARMS
(see Alarms (on page 39))
•
FiCO
2
(inspired CO
2
) alarm (automatic and not adjustable)
• Apnea alarm (automatic and not adjustable)
Note: The apnea alarm occurs when a breath has not been detected for 30 seconds. The
message
ALARM APNEA
appears in the message area along with the time since the last
detected breath.
CO2 Detection
A CO
2
waveform appears when any CO
2
is detected, but CO
2
must be greater than 3.5 mmHg for
a numerical value to be displayed. However, the CO
2
module will not recognize a breath until the
CO
2
is at least 8 mmHg (1.0% or kPa). Valid breaths must be detected in order for the apnea
alarm to function and to count the respiratory rate (RR). The RR represents an average over the
last eight breaths.