ELECTROMYOGRAM (EMG) SYSTEM |  EMG Device | EMG System

ELECTROMYOGRAM (EMG) SYSTEM

NS-EMG-C-1 is a digital EMG device. It acquires, stores and review up to 4 channels of EMG data and 2 channels evoked potential (EP) channels. It can perform routine EMG system recording, EP, as well as nerve conductive velocity (NCV) diagnostic examination.

EMG/EP

System Key Features
  • Pre-amplifier operable with up to 4 EMG channels
  • High signal quality with USV data transmission, shielding the signal from power line interference
  • Consists of 3 standard EMG modules with 4 EP modules
  • Easy-to-understand illustations of electrode placements, stimulation positions and standard waveforms
  • Easy access to waveform data comparison
  • Ability to review and generate report for past cases
EMG Machine
Electromyogram
  • Display Sensitivity: 0.05μV/div ~ 20,000μV/div, ±10% error. No precision requirements below 50μV/div.
  • Frequency-Amplitude Characteristics: 0.2Hz ~10 kHz, error is +10% ~ -50% between 0.2Hz ~ ≤0.5Hz, and error is +5% ~ -30% between >0.5Hz ~10 kHz.
  • Scan Speed: 1ms/div ~ 5000ms/div; error = ±10%;
  • High-Pass Filter: 10Hz ~ 20,000Hz; error = +10% ~ -30%;
  • Low-Pass Filter: 0.1Hz ~ 5000Hz; error = +10% ~ -30%.
  • Common Mode Rejection Ratio: ≥110dB;
  • Input Impedance: ≥1000MΩ;
  • Noise Voltage:= 0.4μV (RMS);
  • Resistance to Polarization Voltage: At ±300 mV DC polarization voltage, bias is ≤5%.
  • Current Pulse Output Intensity: Maximum output 100mA; at 0mA ~ 4mA, step difference is 0.01mA. Error = ±10%;
  • Pulse Output Frequency: 0.1Hz ~120Hz, error = ±10%;
  • Target Pulse Width: 50μS, 100μS, 200μS, 300μS, 500μS, 1000μS; error = ±10%;
  • Stimulus Direction: Positive, Negative, and Two-Way.

A. Normal Mode (Acoustic Stimulation) Parameters

  • Stimulation Type: Short Tone, Pure Tone, White Noise.
  • Stimulation Frequency: 0.1Hz ~100Hz, error = ±10%;
  • Target Signal Probability: 5% ~ 100%, error = ±10%;
  • Stimulation Model (for Short Tone and Pure Tone only): Left Ear, Right Ear, Both Ears, Alternate Ears.
  • Short Tone Only
    • Short Tone Stimulation Phase: Sparse Wave, Dense Wave, Alternating Waves;
    • Maximum Short Tone Intensity: approx. 130dB;
  • Pure Tone only
    • Maximum Pure Sound Intensity: approx. 120dB;
    • Pure Tone Sound Frequency: 250Hz ~7kHz, error = ±10%;
  • White Noise only
    • Maximum White Noise Intensity: approx. 100dB;

B. Multi-Frequency Auditory Steady-State Response (ASSR) Audio Stimulation Parameters

  • Modulation Type: AM/FM
  • Audio Stimulation Intensity: -10dB ~ 130dB HL (Hearing Level), error within ±10%;
  • Carrier Frequency: 250Hz ~ 8000 Hz, error within ±10%;
  • Modulation Frequency: 20 ~ 200 Hz, error within ±20%;
  • Degree of AM: 0 ~ 100%, error within ±30%;
  • Degree of FM: 0 ~ 30%, error within ±30%;
  • AM/FM Phase Difference: 0 ~ 359 degrees, error within ±30%;

C. Video Control Output Signal (Visual Stimulation)

  • Checkerboard Image
    • Monitor can be set to display full-screen checkerboard image with alternating black-and-white tiles.
    • Checkerboard display can be 4X3, 8X6, 16X12, 32X24, or 64X48.
    • Half-screen checkerboard display:
      • Left-half or right-half of screen: 2X3, 4X6, 8X12, 16X24, or 32X48 pattern,
      • Upper or lower half of screen: 4X2, 8X3, 16X6, 32X12, or 64X24 pattern
    • Quarter checkerboard display: 2X2, 4X3, 8X6, 16X12, or 32X24 checkerboard pattern.
  • Horizontal Bar Grid Image
    • Full-screen black-and-white horizontal bar image: 1X3, 1X6, 1X12, 1X24 and 1X48
    • Left-half or right-half of screen only: 1X3, 1X6, 1X12, 1X24 and 1X48;
    • Top or bottom half of screen only: 1X2, 1X3, 1X6, 1X12 and 1X24,
    • Quarter screen display: 1X2, 1X3, 1X6, 1X12 and 1X24.
  • Vertical Bar Grid Image
    • Full-screen black-and-white alternating vertical bars: 4X1, 8X1, 16X1, 32X1, and 64X1
    • Left half or right-half of screen only: 2X1, 4X1, 8X1, 16X1 and 32X1
    • Top or bottom half of screen only: 4X1, 8X1, 16X1, 32X1 and 64X1
    • Quarter screen display: 2X1, 4X1, 8X1, 16X1, and 32X1.
  • Stimulation Frequency: 0.1Hz – 1Hz, error = ± 10 %;
  • Target Signal Probability (P300 only): 5% ~ 100%, error = ± 10 %;
  • Non-target signal 1 Probability (P300 only): 5% ~ 100%, error = ± 10 %;
  • Non-target signal 2 Probability (P300 only): 5% ~ 100%, error = ± 10 %.

D. Goggles (Visual Stimulation)

  • Stimulus Frequency: 0.1Hz – 50Hz, error = ± 10 %;
  • Stimulation Modes: Left Eye, Right Eye, Both Eyes, Alternate Eyes.

System Key Features:

  • Pre-amplifier operable with up to 4 EMG channels
  • High signal quality with USB data transmission, shielding the signal from power line interference
  • Consists of 3 standard EMG modules and 8 NCV modules
  • Easy-to-understand illustrations of electrode placements, stimulation positions and standard waveforms
  • Easy access to waveform data comparison
  • Ability to review and generate report for past cases

Nerve Conduction Velocity (NCV)

  • Waveform caching function enables saving of multiple waveforms with the same examination point
  • Screen display of individual F-wave, H-wave and overlay
  • Display of latency and amplitude values with measurement lines for easy reference
EMG Features
Nerve Conduction Velocity

System Parameters:

A. Amplifier Parameters

  • Display Sensitivity: 0.05μV/div ~ 20,000μV/div, ±10% error. No precision requirements below 50μV/div.
  • Frequency-Amplitude Characteristics: 0.2Hz ~10 kHz, error is +10% ~ -50% between 0.2Hz ~ ≤0.5Hz, and error is +5% ~ -30% between >0.5Hz ~10 kHz.
  • Scan Speed: 1ms/div ~ 5000ms/div; error = ±10%;
  • High-Pass Filter: 10Hz ~ 20,000Hz; error = +10% ~ -30%;
  • Low-Pass Filter: 0.1Hz ~ 5000Hz; error = +10% ~ -30%.
  • Common Mode Rejection Ratio: ≥110dB;
  • Input Impedance: ≥1000MΩ;
  • Noise Voltage:= 0.4μV (RMS);
  • Resistance to Polarization Voltage: At ±300 mV DC polarization voltage, bias is ≤5%.

B. Current Stimulation Parameters

  • Current Pulse Output Intensity: Maximum output 100mA; at 0mA ~ 4mA, step difference is 0.01mA. Error = ±10%;
  • Pulse Output Frequency: 0.1Hz ~120Hz, error = ±10%;
  • Target Pulse Width: 50μs, 100μs, 200μs, 300μs, 500μs, 1000μs; error = ±10%;
  • Stimulus Direction: Positive, Negative, and Two-Way.

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