1. Tear open the package along the V-shaped opening and take out the Anesthesia Depth Sensor; 2. Remove the Disposable Electroencephalogram Monitoring Sensor from the release film (first check whether the electrode conductive glue is dry, and if changes are found, replace the sensor); 3. Place the three Eeg Disposable Sensor patches in the corresponding positions as shown in the figure (Note: To prevent the conductive adhesive from overflowing and causing poor contact, 3. Press the edge of the patch first, and then gently operate the middle of the patch); 4. Place the electrode on the middle of the forehead, approximately Scm above the beam. The electrodes are fixed on top of the eyebrows. The electrode is fixed on the mastoid process behind the ear; 5. Insert one end of the sensor chip connection card into the corresponding interface of the lead.