Users Manual Part 1

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Nerve Integrity Monitor
• Control whether the system shows latency values in non-Nervassure stimulated waveform sweeps using the Latency selection
button.
• Control whether the system measures latency to the onset of the response, or to the highest peak EMG value of the response by
selecting Onset or Peak from the drop-down menu.
• If the user has Latency enabled on the Latency panel, then for every stimulation pulse that causes a response greater than 20 µV,
the system displays the Latency value on the waveform. It may be measured to the onset of the response or to the highest peak
EMG value of the response depending on the settings you chose.
On the Additional Features panel, the user can do the following:
• Enable Quick Tags. This displays quick tags on the Quick Tags panel on the right hand side of the monitoring screen. See the
“Quick Tags” topic for more information.
• Show Measure Button. This displays the measure button in the left panel enabling the user to use the measure feature. See the
“Measure” topic for more information.
• Show Freeze Button. This displays the freeze button in the left panel enabling the user to freeze the waveform display. See the
“Freeze” topic for more information.
• Enable NerveTrend (available in select procedures). This turns on NerveTrend functionality by presenting NerveTrend settings in
the settings panel and enabling NerveTrend baseline to be taken.
On the Snapshot Default Actions panel, you can do the following:
• Choose the default snapshot actions using the Comment, Print, and/or Save To File selection buttons. You can select more than
one action.
• Select the Probe Saves Snapshot to control whether the center position on the incrementing stimulus probe saves a snapshot.
• If the center button is enabled and the Comment button is selected, then when you press the center probe button:
— The title/comment box pops out.
— One of the titles in the list is selected.
— The up/down buttons on the probe now do not change the stim current, but rather move the highlight bar up and down the
title list.
• Comments. Opens comments box enabling comments and Event Titles (you may enter titles via keyboard or select them from a
customized list) to be added to the captured event when you press the Snapshot button. The system displays these comments/
title on the printed and/or saved event. Refer to the “Titles and Comments Panel” topic to customize this list.
Note: You can modify Comments and Event Titles in Reports Mode.
• Print. Sends captured event to the printer (with comments enabled) when you press the Snapshot button.
• Save. Sends captured event to the USB mass storage device (with comments if enabled it) when you press the Snapshot button.
You can use the Waveform Filters panel to toggle the artifact lter on/o. If you select the artifact lter you can control the following
waveform lters:
• Artifact Filter: selecting the artifact lter enables the detection of artifact as “Spiked Waveforms” .
• Low-Pass Filter: low frequency response is generally caused by the movement of the electrodes, electrode wires, tissue etc.
This can result in a response that is not a true EMG response. Selecting the low-pass lter enables a lter that reduces peak-to-
peak amplitude (about 20%) in a frequency range below 70Hz reducing unwanted response. The lter is on by default for all
procedures.
• High-Pass Filter: reduces frequencies seen below the set value.
• Reject Stim Pulse Artifacts: enables the artifacts rejection lter. Refer to the “Recognizing stimulus artifacts” topic for additional
information.
• Rejection Period: the user can set the STIM rejection period time.
Stimulation panel
Use the Stimulation settings panel to make adjustments to stimulators, such as assigning names and probe types.
Note: If you adjust the advanced settings, you will change the default characteristics of your NIM Vital. Only someone with
knowledge of the advanced settings and how they impact your NIM Vital should make changes. If the user selects
, the system
displays a warning. The user must select [Cancel] or [Conrm] to return to settings or move forward to the advanced settings panel.
FCC use only, not for Medical use