Noise On Intracardiac Signals; For Real-Time Testing During A Case - GE Cardiolab II Plus Service Manual

Noise on Intracardiac Signals

For real-time testing during a case:

Make duplicate channels
Detailed Testing: Amplifier Channel Test
2002938-002E
Clean the FOC contacts with a non-abrasive, lint-free cloth and
isopropyl alcohol.
Replace the fiber optic cable.
If the waveforms only exist on one channel, try replacing either the
catheter, catheter extender, or catheter junction box. You may also
try another Catheter Input Module.
The noise should resemble 60 Hz or some other relatively consistent
interference which are not associated with stim artifact.
Go to the amplifier test selection under Administration and perform
a hardware reset on the amplifier (this is equivalent to turning the
amplifier off and on, which would be the second option).
Verify that the catheter is correctly plugged into the Catheter Input
Module (CIM) and that these poles have been correctly entered into
the study configuration.
Remove/replace the catheter extender cables, especially if they have
been re-sterilized.
If the noisy signal is set to poles x and y, set up another channel (one
with a high quality intracardiac signal, (for example, HRA or RVA)
with the same poles and see if the noise is present there as well. This
tests the channel.
While keeping the channels consistent, try inputting the catheters to
different poles on the CIM and see if the noise follows the signal. This
tests the CIM poles.
NOTE
If the last two tests make no difference, the problem may exist with
the catheter itself. Try replacing the catheter.
Input a simulated signal into poles 1 and 2 of the CIM block A and
connect the ground of the simulator to the RL limb lead
In the study configuration set all intracardiac channels to:
Poles 1 and 2
Cardiolab® II Plus Amplifier Manual
Appendix A – Maintenance and Troubleshooting
A-5