Nerve Monitoring System, Salt Lake City VA Health Care System

Salient Characteristics for nerve monitoring system

• 1 to 4 channels that are individually and simultaneously selectable.
• Input sensitivity 5 – 10,000 μV peak-to-peak AC Coupled ± 5% at 10 mV to ± 30% at 100 mV peak-to peak AC Coupled
• Input Impedance > 10 Meg Ohm
• Patient Isolation Wired 1,000 Vrms 60Hz < 100 µA
• Measurement Range:
  • Electrodes: 0K to 2K Ohm ± 500 Ohm >2K-175K Ohm ± 20% Ground and Stim Returns < 25K.   
• Bipolar Electrocautery Rejection Continuous Monitoring During Bipolar Cautery < 40 watts
• Monopolar Electrocautery (ESU) Interference Automatic detection and muting in wired or wirefree modes
• Muting Console Input Sensitivity
  • Muting (0.6 - 2.0 Volts Vrms) Non-Muting (<0.3 Volts Vrms)
• Muting Detector Input ESU Immunity
  • ESU < 100 Watts Cut / Coag or (<3.0 Vrms 100-800 KHz Sq. Wave)
• Stimulus Output Accuracy ± .01 mA (or ± 10% of reading at 1 K load) over Stimulus Range
• Stimulus Measurement Accuracy ± .02 mA (or ± 10% of reading at 1 K load) over Stimulus Range
• Waveform Monophasic, Bi-phasic, Alternating Polarity, or Pulse Train of square pulses
• Interpulse Interval 50uS, 100uS, 500uS, 1-5mSec
• Interphase Delay 0, 50, 100, 500, uS