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During physiologic calibrations, the EEG and EOG channels present a high amplitude, very slow wave artifact. What is the most appropriate course of action?
Take steps to correct sweat artifact including cooling the patient and replacing the ground lead.
During the night, the tech notices that the C3 channel appears slightly darker than the other EEG channels. What should she do first?
Run an impedance check. If the impedance in this channel is higher than 5k Ohms, the electrode should be reapplied or replaced.
What artifact is seen at the 15-second mark of the epoch?
Snore Artifact
What artifact is shown in the airflow channel?
Pen Blocking
What artifact is shown in the C3 channel?
High Impedances or 60Hz Artifact
What artifact is shown below?
Movement Artifact
What is wrong with the thermister channel?
The gain or sensitivity setting is too high, causing the signal to intrude into other channels.
What artifact is seen in the Chin EMG channel?
EKG Artifact
What artifact is circled?
Electrode Popping
The airflow channel squares rather than rounds at the peaks. What should the technician do?
Adjust the sensitivity setting to correct the pen blocking artifact.
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