The high-frequency electrosurgical knife head is in direct contact with the human body, which is not only directly related to the safety of the patient during the operation, but also has a relationship with the user of the high-frequency electrosurgical knife. The high-frequency electrosurgical knives in normal service in the hospital should be regularly quality controlled to ensure their safety in clinical use. Among them, the leakage current index is an important item of the safety index of high-frequency electrosurgery.

The national standard for the leakage current of high-frequency electrosurgery is less than 150ma. There are several main factors that cause the leakage current of high-frequency electrosurgery to exceed the standard:

1. The aging of the equipment is caused by the aging of electronic components. Generally, the longer the use time, the greater the leakage current will be.

2. The ground wire is not connected as required. In most cases, the ground wire does not need to be connected during the use of the high-frequency electric knife. If the leakage current increases, the ground wire can be connected.

3. The use of environmental impact.