Physio-Control LIFEPAK 15 - Manual (Page 93)

MONITORING
4
©2007-2013 Physio-Control, Inc. LIFEPAK 15 Monitor/Defibrillator Operating Instructions
4-49
Note: The capnography module performs self-maintenance within the first hour of monitoring and
once an hour during continuous monitoring. The self-maintenance includes “auto-zeroing.” Self-
maintenance is also initiated when the surrounding temperature changes 8°C (14.4°F) or more, or
the surrounding pressure changes greater than 20 mmHg. The CO
2
module detects this change and
attempts to purge the tubing. To clear the CO2 FILTERLINE PURGING or CO2 FILTERLINE BLOCKAGE
messages, remove the FilterLine tubing and reconnect it to the monitor.
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 3-21)
• 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.