Users Manual Part 1
59
Nerve Integrity Monitor
After Removal:
• Channel 1 shows a lead o message.
• After approximately a few seconds, the system displays “Lead O” in yellow text on a zero (0) amplitude waveform line.
2. Reconnect the electrode and conrm the NIM Vital returned to normal operation.
3. Repeat test for all channels.
Note: If any of these conditions are dierent, check your setup. If still incorrect, contact Customer service.
Stimulation
Mechanical stimulation
The positive and negative patient stimulator electrode cables are sensitive to touch (mechanical stimulation) and generate EMG
visual tone responses when manipulated (tapped). These simulated responses appear as spontaneous burst-like responses.
1. Start at the Monitoring screen with default settings and all electrodes connected.
Note: The Artifact Filter check box on the Settings/Display/Advanced button/MONITORING tab should be selected (On) by default. If
not, turn it on (select).
2. Lightly tap the electrode connectors.
3. Observe the following:
• You should hear single beep as each channel is tapped.
• Alarm tones are lowest for channel 1 and highest for channel 4.
• You should see sharp (spike like) waveforms on the screen.
• The “Detected Artifact” appears as an orange trace.
• Tapping multiple cables produces multiple alarms and waveforms.
Un-Stimulated (mechanical) Event Stimulated (patient simulator) Event Stimulated Event
Stimulus: set and measure
1. Start at the MONITORING screen (default settings) with all electrodes connected using a monopolar probe with universal handle,
or incrementing probe handle with Prass tip.
2. Check the stimulus adjustment buttons for the following:
• The upper right of the screen should read 1.0 unless the user needs to lower it (this is the mA setting).
• Below the mA setting is a small window reading 0.00mA. This is the measured value.
• Press [+] and [-] observing that the mA setting changes values.
• Press the mA [+] until reaching a value of 3.00mA.
• A dialog box appears
• Stimulus in excess of 3 mA.
• Press [Conrm] to enable stimulus.
FCC use only, not for Medical use