Reduce or eliminate stim artifact suggestions

1) Ensure the Notch filter is off to reduce or eliminate ringing artifact which can cause the waveform to be pushed off center.

2) Avoid large spacing between anode and cathode.  Try various anode positions if possible to reduce the stimulus artifact.

4) Try using Biphasic stimulus pulse.  The ES-IX (Pro or Elite systems) has a setting you can check.  It is known to cancel out stimulus artifact.

4) Increase the High Cut Filter to avoid distorted stim artifacts.  A High Cut Filter of 10k Hz or 15k Hz may be useful.

5) Try a Low Cut Filter of 0.5 Hz.  This has been known to improve stimulus artifact from popliteal fossa recordings and recording responses where the stimulator is in proximity to the recording electrodes.

6) Ensure impedances are low and balanced for both recording and stimulating electrodes.

7) The ground position will have an effect.  Try positioning ground midway between stimulating and recording electrodes if possible.

8) Consider using special triple hook probes (100 degrees and 180 degrees) specially designed for peripheral nerve stimulation.  Due to the layout of the cathode and anode, the stimulus artifact is greatly reduced.  The probes can be seen in our e-catalog online.