Appendix A – Maintenance and Troubleshooting
2002938-002E Cardiolab® II Plus Amplifier Manual A-9
catheter with the stim artifact is connected. Pace through the
new catheter.
If no artifact is present, the problem is with the original catheter.
If artifact is still present, move the catheter to poles on the CIM
which are seldom used. If there is no stim artifact here, the problem
may be with the original poles on the CIM. They may have loosened
over time. The pacing poles at the bottom of the CIM may also be
used for this purpose.
Replace the stim cable from the stimulator to the amp. If artifact is
no longer present, the cable was bad.
Move the stim cable input for the stim channel with the artifact
problem to another channel on the stimulator. If the artifact is no
longer present, the stimulator channel may be bad.
Try using another stimulator. A hand held temporary pacemaker or
another battery operated stimulator will work.
Connect the catheter directly to the stimulator. If the artifact is no
longer present, the problem may be with the amplifier or one of the
cables connected to the amplifier.
For continued problems with stim artifact, please fax a snapshot of
the signals to customer support for evaluation.
Stimulus Artifact on ECG Signals
Does the artifact appear on all of the surface leads?
If Lead I is clean and all other ECGs have artifact, replace the
left leg patch.
If Lead II is clean and all other ECGs have artifact, replace the
left arm patch.
If Lead III is clean and all other ECGs have artifact, replace the
right arm patch.
If all ECGs have artifact, replace the right leg patch.
Buff and clean the patient’s skin before applying new patches.
If the artifact occurs at random times on random signals, this is
further evidence that a faulty patch or lead may be causing the
artifact. If changing the patch above does not help, try swapping the
associated lead wire with one that is known to be producing a good
signal.
Reduce the gain on the affected signals.
Select the Reset Hardware button in the amplifier test window under
the Administration menu.
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