Users Manual Part 1
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Nerve Integrity Monitor
• Nervassure alarm. The system uses several alarms to notify you when a plotted point is determined to be outside an alarm limit.
Refer to the “Muting a Nervassure alarm” topic for more information.
— Alarm with yellow condition. A single bong alarm sounds every ve seconds until the condition is remedied or moves into a
dierent alarm condition.
— Alarm with red condition. A double honk alarm sounds every ve seconds until the condition is remedied or moves into a
dierent alarm condition.
— Alarm with Loss of Signal (LOS) condition. A Bleedle alarm sounds every ve seconds until the condition is remedied.
Voices
Voice types:
• Stimulation delivery conrmation:
— Voice - Stimulus. With “Stimulus”, delivery of current to the surgical eld is announced by the word, “STIMULUS”. It may be
turned on or o and has volume control.
— Voice - Setting. The “Setting” voice announces the numeric current value of the STIMULUS setting. It also announces any new
stimulus setting when you make adjustments.
Example: The system announces 0.50mA as “Point Five”. It may be turned on or o and has volume control.
Note: Voice - Setting or Voice - Stimulus does not sound for stimulus current levels below 0.05mA.
• Activation of auto threshold:
— Threshold increased.
— Threshold decreased.
• Voice – Stimulated EMG Values: when selected, the system turns on annunciation of EMG responses via voice.
Tones
The Medtronic NIM Vital system uses the following tones:
• Stimulus Delivery.
• EMG Response:
— Burst tone. Brief tone caused by electrical stimulation, direct nerve contact, irrigation, or thermal changes.
— Train tone. Longer version of the Burst tone lasting seconds to minutes, caused by nerve excited/irritated, irrigation, drying,
bumping, or anesthesia.
— Pulse tone. Regularly repeating tone caused by electrical stimulation, tumor mapping, verifying nerve integrity.
• If the system uses the Continuous Tone, then delivery of stimulus current is accompanied by a continuous, warbled, high-low
tone (referred to as “Stimulus Warble Tone”).
• If the system uses the Brief Tone, then delivery of stimulus current is accompanied by a brief warbled tone.
Note: Stimulus tones do not sound for stimulus current levels below 0.05mA.
FCC use only, not for Medical use