1, pay attention to the single start time  
Uninterrupted excitation of high-frequency current will make either negative plate become hot (scalding) Ideally, the working condition is 1:3, that is, work for 1 second, stop for 3 seconds. Even if you can not reach, you should also turn off the equipment to let it rest and dissipate the heat during the successive operations.
2, pay attention to standardize the use of
The tip of the blade needs to be tightly connected to the handle, choose the right protective cover for the pen tip of the scalpel, remove the crust formed on the tip of the blade in a timely manner, ordinary surgical gloves can not provide adequate insulation, forceps with insulation protection should be used.
3、Pay attention to the placement of instruments
Do not place the electrode handle in direct contact with the patient's body or on a sterile towel on the patient's body. They should always be placed in an instrument tray or in a special electrode holder.
4、Clear the smoke
Surgical smoke is a gaseous substance produced during surgery, also known as aerosol, burnt smoke, heat-transmissive plume, etc. It is formed by high-frequency electrocautery knife, laser knife, ultrasonic scalpel, high-speed drills, saw blades, and burrs of instruments to destroy and vaporize tissue proteins and fats in the course of surgical procedures. Surgical smoke not only obstructs the vision of the surgical staff, but also releases toxic and harmful substances into the air.
5、Attention to oxygen gathering
Avoid combustion in an oxygen-rich environment and maintain oxygen concentration at a safe level. Conscious patients with nasal cannula oxygen flow rate of 3 L/M or less, oxygen mask has higher risk. Oxygen concentration should be reduced to 40% or less in patients who are extubated, with a risk of combustion at concentrations greater than 40%.
6、Attention to the alarm sound
If there is an alarm during use, stop using it in time, check whether the negative plate of the circuit is shifted, dislodged, and whether it is pasted evenly and firmly, and turn off the machine and replace or re-paste it if necessary.
7、Pay attention to ECG monitoring
ECG electrodes should be far away from the surgical area, at least 15 centimeters from the applied electrodes, to avoid close passes through the ECG electrodes and the heart in the current loop.
8、Attention to reduce the magnetic field interference
Coupling effect (coupling effect) refers to the phenomenon that there is a close mutual influence between the inputs and outputs of two or more circuit originals or electrical networks, and the transfer of energy from one side to the other through interaction. The pen wires are wrapped around a fluorescent tube and the pen is activated to light up a fluorescent lamp that requires 220V. So which of the following two ways of securing an electric knife pen lead is better?

At the end of the operation, turn off the power supply of the main unit after minimizing the output power, then unplug the unipolar electric knife wire, remove the negative plate of the circuit, and unplug the power cord.