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1. The negative plate should be selected where the blood vessels are rich and closest to the muscle of the surgical site (recommended in the upper arm and thigh of the artery).

2. It is best to shave the hair and then use alcohol to remove grease and dander on the skin, etc., to be wiped dry and then paste the circuit negative plate, reduce the impedance value, to achieve a more safe effect.

3. After determining the surgical site of the patient, choose the position closest to the surgical site without interfering with the operation, avoid finger contact with the conductive adhesive surface, and carefully tighten the four corners.

4. The use of wire circuit board: the circuit board connector is correctly inserted into the electroknife circuit jack seat, the use of the circuit board without wire need to check whether the return route is good, open the chuck and put the circuit patch to the depth of the conductive adhesive after clamping and gently pull to ensure that it will not loose, insert the connector into the circuit socket.

5. Paste the loop board as vertically as possible along the longitudinal position of the blood vessel distribution, which is conducive to recovering the current.

6. If the loop board paste position is the upper arm or thigh, should avoid without their own touch or overlap of the loop board.

7. Before you are ready to place the skin electrode, check whether the electrode and wire are damaged or expired and other unsafe suspicions to avoid accidents.

8. The negative plate should not be attached to the bone protrusion, physiological bend, dry skin, joint and artificial implant metal parts or near the electrocardiogram electrode line to avoid the current circuit is not smooth to cause burns.

9. Negative plate can not be attached to the waist, underarm and body pressure parts, which is not conducive to heat dissipation, due to heat accumulation will lead to thermal burns.

10. The corners of the negative plate can not be rolled up, and the reduction of the contact area between the plate and the human body will increase the impedance when the current is recovered, which will lead to frequent alarm of the electric knife due to excessive impedance, no output of the tool head or the possibility of burning.

11. The negative plate paste position can not be in a straight line with the surgical position through the chest, especially in patients with heart disease and patients with stents.