news

When the high-frequency electrotome is used, it is usually necessary to apply a negative electrode plate on the patient. The negative electrode plate is also called the electrode plate and the loop plate. It plays a role in recovering the high-frequency current during the operation.

In addition, the use of negative plates also helps to reduce current density, increase heat dissipation, disperse current, and prevent thermal damage.

Early high-frequency electroknife designs, which used the earth as a loop, were prone to accidental burns and scalds and have been banned by the FDA and AAMI. Now the high-frequency output of the electroknife is isolated floating type, the high-frequency current no longer takes the ground as a loop, but through the negative plate flow back to the electroknife to form a complete loop, which greatly reduces the occurrence of alternative circuits, so it is safer.

2. Where should the negative plate of the high-frequency electric knife be pasted?

The negative plate is a consumable product of the high frequency electrotome host, which is required to be pasted to the appropriate part of the patient. Generally speaking, the selection criteria for the negative plate paste site of the high-frequency electroknife include an area that is easy to observe, rich in muscle and blood vessels, and clean and dry skin, which should be as close to the surgical incision site as possible, and pasted on the same side of the surgical site; Metal implants, skin folds, scar tissue, tattoos, hair, joints and other parts are not suitable for attaching negative plates.

3.What are the precautions for the use of the negative plate of the high-frequency electric knife?

①Choose the appropriate negative plate

According to the patient’s body type, surgical site and surgical time and other factors, choose the appropriate size and shape of the negative plate. In general, the larger the area of the negative plate, the more uniform the current distribution, and the less damage to the skin. At the same time, it is necessary to ensure that the conductive performance of the negative plate is good and that there is no damage or aging.

②Paste in the correct position

The negative plate should be attached to a location where the patient has abundant muscles, few blood vessels, and is close to the surgical site. Avoid sticking to bone processes, broken skin, scar or hairy areas, so as not to affect the conduction effect and increase the risk of skin damage. For children, emaciated patients, or patients with special body types, special attention should be paid to choosing the appropriate paste position.

③Skin preparation before paste