natus OLYMPIC CFM 6000, Руководство оператора

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OLYMPIC CFM 6000 Operator’s Manual 9
Figure 3 Basic and Insight views
EEG Tracings
The EEG tracing shows the underlying EEG detail that relates to the cursor position on the
CFM tracing. The EEG cursor on the CFM tracing represents 15 seconds. The EEG
window shows between 3 and 14 seconds of the EEG tracing at a time, depending on the
EEG speed setting. The EEG can help confirm seizures and other brain activity. Display
the EEG at a lower amplitude setting to see more detail; display it at a higher amplitude
setting to show only major events. For information about changing speed and amplitude
settings, see
Changing EEG Speed and Amplitude on page 20.
The following illustration shows a CFM tracing with underlying EEG data.
Figure 4
CFM tracing with EEG detail
Impedance Tracings
The impedance tracing indicates the connection quality (contact between the patient and
the electrodes) and distinguishes noise. Impedance greater than 20 k
Ω
indicates that the
electrodes should be reapplied or replaced. Occasional random spikes might occur when
electrode conductivity changes for brief moments. The
Lead-Off alert appears and sounds
if the impedance becomes greater than 20 k
Ω
for more than three seconds.
Tip : To maintain good impedance when recording over long periods of time, it might be
necessary to reattach or replace the electrodes periodically.
The following illustration shows a CFM tracing with the associated impedance tracing.
Figure 5 CFM tracing with impedance