User Guidelines

Complete guide to using the NeuroHTz EEG screening system

Pre-Test Preparation

  1. Patient Preparation:

    Ensure patient is well-rested, has clean hair, and has avoided caffeine for 2 hours before testing. Remove any metal jewelry or accessories.

  2. Environment Setup:

    Choose a quiet, dimly lit room with minimal electrical interference. Temperature should be comfortable (20-24°C).

  3. Equipment Check:

    Verify all electrode connections, test audio output levels, and ensure stable power supply and network connectivity.

  4. Patient Registration:

    Complete patient demographics, medical history, and hearing assessment. Auto-generated patient ID will be assigned.

⚠️ Important Safety Notes

  • Always use medical-grade, sterilized electrodes
  • Check for skin allergies before applying electrode gel
  • Ensure proper grounding and electrical safety
  • Have emergency procedures in place

Electrode Placement (10-20 System)

  1. Scalp Preparation:

    Clean electrode sites with alcohol prep pads and gently abrade skin to reduce impedance below 5 kΩ.

  2. Reference Electrodes:

    Place reference electrodes on earlobes (A1, A2) or mastoid processes. Ensure secure, low-impedance contact.

  3. Active Electrodes:

    Position electrodes according to 10-20 system: Fp1, Fp2, F3, F4, C3, C4, P3, P4, O1, O2, F7, F8, T3, T4, T5, T6, Fz, Cz, Pz.

  4. Ground Electrode:

    Place ground electrode on forehead (Fpz) for optimal noise reduction and signal stability.

💡 Pro Tips for Better Signal Quality

  • Use conductive gel sparingly to prevent bridging
  • Check impedances before starting - should be <5kΩ
  • Secure cables to prevent movement artifacts
  • Test signal quality with eyes open/closed

Test Execution

  1. Baseline Recording:

    Record 2 minutes of resting EEG with eyes closed to establish baseline activity and verify signal quality.

  2. 40 Hz Stimulus Presentation:

    Present 40 Hz auditory stimulus (click trains or amplitude-modulated tones) at 60-70 dB SPL for 5 minutes.

  3. Real-time Monitoring:

    Monitor signal quality indicators, watch for artifacts, and ensure patient remains alert and comfortable.

  4. Test Completion:

    Stop recording, save data automatically, and proceed to AI analysis. Total test time: 7-10 minutes.

Result Interpretation

AI Analysis Output

The system provides binary classification (Normal/Abnormal) with confidence scores:

Key Metrics

⚠️ Clinical Limitations

This system is for screening purposes only and should not replace comprehensive neurological evaluation. Always consider clinical context and patient history when interpreting results.

Troubleshooting

Common Issues and Solutions

Quality Control Checklist

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