Physio Control LIFEPAK 20, Manual

Page: 57 / 227

Monitoring
3-8 LIFEPAK 20e Defibrillator/Monitor Operating Instructions
Outdated, corroded, or dried-
out electrodes. • Check date codes on electrode
packages.
• Use only silver/silver chloride
electrodes with Use By dates that
have not passed.
• Leave electrodes in sealed pouch
until time of use.
Loose connection.
Damaged cable or connector/
lead wire. • Check/reconnect cable
connections.
• Inspect ECG and therapy cables.
• Replace if damaged.
• Check cable with simulator and
replace if malfunction observed.
Misplaced electrodes/lead
wire. • Confirm correct placement.
• Select lead view with optimal QRS
detection.
Noise because of radio
frequency interference (RFI). • Check for equipment causing RFI
(such as a radio transmitter) and
relocate or turn off equipment
power.
4 Baseline wander
(low frequency/high
amplitude artifact). Inadequate skin preparation.
Poor electrode-skin contact.
Diagnostic frequency
response. • Prepare skin and apply new
electrodes.
• Check electrodes for proper
adhesion.
• Print ECG in monitor frequency
response.
5 Fine baseline artifact
(high frequency/low
amplitude). Inadequate skin preparation.
Isometric muscle tension in
arms/legs. • Prepare skin and apply new
electrodes.
• Confirm that limbs are resting on a
supportive surface.
• Check electrodes for proper
adhesion.
6 Systole beeps not
heard or do not occur
with each QRS
complex. Volume too low.
QRS amplitude too small to
detect. • Adjust volume.
• Change ECG lead.
7 Monitor displays
dashed lines with no
ECG leads off
messages.
PADDLES
lead selected but
patient connected to ECG
cable.
• Select one of the limb leads.
8 Heart rate (HR)
display different than
pulse rate. Monitor is detecting the
patient’s internal pacemaker
pulses. • Prepare skin and apply new
electrodes in different location.
• Select lead view with optimal QRS
detection.
9 Internal pacemaker
pulses difficult to see. Pulses from pacemaker are
very small. Monitor the visibility
of frequency response limits. • Turn on internal pacemaker
detector (refer to page 3-6 ).
• Connect ECG cable and select
ECG lead instead of paddles.
• Print ECG in diagnostic mode
(refer to page 3-5 ).
Table 3-2
Troubleshooting Tips for ECG Monitoring (Continued)
Observation Possible Cause Corrective Action