Patent ID: 12201345

REFERENCE NUMBERS OF PARTS IN FIGURES ARE AS FOLLOWS:

1, coating part;2, sunken groove;3, metal part;4, negative electrode;5, positive electrode;6, coating part of positive electrode;7, sleeve

DESCRIPTION OF THE EMBODIMENTS

Next, the technical solutions in embodiments of the disclosure will be clearly and completely described. Apparently, the described embodiments are only one part of embodiments in the present application, but not all the embodiments. Based on embodiments of the present application, other embodiments made by those of ordinary skill in the art without any creative efforts all belong to the scope of protection of the present application.

Referring toFIG.1, a stereo view of a monopolar electrode containing a coating according to an embodiment of the disclosure is shown. The monopolar electrode is used for electrode surgical instruments, preferably for a high-frequency electrode knife. The monopolar electrode, as the head of the high-frequency electrode knife, applies cutting or electrocoagulation energy to tissues of a patient. The high-frequency electrode knife is generally provided with a high-frequency generator, a circuit board and a power source interface, wherein, the high-frequency generator provides high-frequency current, the circuit board drives and controls the head of the electrode knife to provide adaptive electric power for the head of the electrode knife, thereby transmitting the proper electrically cut or coagulated energy to the head of the electrode knife.

The monopolar electrode inFIG.1includes a metal electrode, a first conductive coating1located on the surface of the metal electrode, a conductive metal part3and a sunken groove2located between the first conductive coating1and the metal part3, wherein, the first conductive coating1is used for contacting human tissues, the metal part3is electrically connected with the electrosurgical instrument, preferably, the metal part3is loaded to the head of the electrosurgical instrument and sufficiently contacts with a conductor in the instrument, the sunken groove2is used for locking and latching the monopolar electrode. The first conductive coating1is a non-stick coating.

In one embodiment, the material of the metal electrode is the same as that of the metal part3.

In practical application, the whole monopolar electrode can be loaded to the holding portion of the monopolar instrument of the electrosurgical system, or serves as one component of the monopolar instrument. The monopolar instrument is connected with the high-frequency generator of the electrosurgical system through wire cables; the high-frequency generator generates high frequency current which is conducted to the first conductive coating1via the conductive metal part3; because the first conductive coating1is conductive, the high frequency current is conducted to the first conductive coating1to contact with the human tissues; after flowing through the human body, the current returns back to the high-frequency generator through a negative electrode.

Referring toFIG.2, a stereo view of a bipolar electrode containing a coating according to another embodiment of the disclosure is shown. The bipolar electrode is used for electrosurgical instruments, preferably for a high-frequency electrotome. The bipolar electrode, as the head of the high-frequency electrode knife, applies cutting or electrocoagulation energy to human tissues. The high-frequency electrode knife is generally provided with a high-frequency generator, a circuit board and a power source interface, wherein, the high-frequency generator provides high-frequency current, the circuit board drives and controls the head of the electrode knife to provide adaptive electric power for the head of the electrode knife, thereby transmitting the proper electrically cut or coagulated energy to the head of the electrode knife.

The bipolar electrode inFIG.2includes a negative electrode4, a positive electrode5, a second conductive coating6on the surface of the positive electrode5and a sleeve7, wherein, the negative electrode4and the positive electrode5are used for contacting with human tissues, the sleeve7is electrically connected with the electrosurgical instrument, preferably, the sleeve7is loaded to the head of the electrosurgical instrument and sufficiently contacts with a conductor in the instrument. The second conductive coating6is a non-stick coating. In this embodiment, the second conductive coating6is only provided on the surface of the positive electrode5, and in other embodiments, the second conductive coating6can be provided on the surface of the negative electrode4, or the surfaces of the positive electrode5and the negative electrode4are both provided with the second conductive coatings6.

The second conductive coating6can entirely cover the positive electrode5, or can also partially cover the positive electrode5.

In one particular embodiment, at least two wires are contained in the sleeve7, the negative electrode4and the positive electrode5are each conducted with one wire.

In one particular embodiment, the second conductive coating6completely covers the positive electrode5. In this case, the high-frequency generator emits high frequency current which flows into the positive electrode5via one wire, and then is transferred to the human tissues through the second conductive coating6; after flowing through the human body, the current returns back to the high-frequency generator through the negative electrode4and the wire connected therewith.

In another particular embodiment, the second conductive coating6partially covers the positive electrode5. In this case, the part of the positive electrode5on which the second conductive coating6covers contacts with the human tissue through the second conductive coating6; the part of the positive electrode5on which the second conductive coating6does not cover directly contacts with the human tissue; the high-frequency generator emits high frequency current which flows into the positive electrode5via one wire; one part of the high frequency current is transferred to the human tissues through the second conductive coating6, and the other part of the high frequency current is directly transferred to the human tissues; after flowing through the human body, the current returns back to the high-frequency generator through the negative electrode4and the wire connected therewith.

The first conductive coating1and the second conductive coating6preferably adopt PTFE doped graphene. Such the composite material can have relatively high conductivity, and meanwhile has the characteristics of abrasion resistance, no adhesion and the like.

The composite material forming the first conductive coating1and the second conductive coating6can be prepared by using multiple methods. In one particular embodiment, firstly, PTFE aqueous dispersions and oxidized graphene are doped in aqueous solution through electrostatic adsorption, and then a hybrid material is coated after the oxidized graphene is reduced.

Preferably, when in doping, the content of PTFE particles in the PTFE aqueous dispersions is 20 wt %, and the content of the oxidized graphene in the PTFE aqueous dispersions is 2 wt %.

The thicknesses of the first conductive coating1and the second conductive coating6can be set according to a need. In one particular embodiment, the thickness of the coating is less than 0.05 mm, preferably, the thickness of the coating is controlled to be between 0.003 mm and 0.020 mm.

The present application mainly solves the problems that in the process of using the electrosurgical instrument, the current acts on the human tissues so that tissue protein is solidified and adhered to the instrument electrode, and then the normal use of the instrument is affected. Compared with the existing technology that the tissue adhesion is controlled by the main engine, this innovation does not require the main engine to have high-grade feedback regulation functions, and the main engine of the ordinary high-frequency electrotome can also used, thereby greatly reducing the cost. In addition, compared with the existing technology of the structure design of the instrument electrode, the present application ensures that the electrotome work region and work energy are not reduced, and the blood coagulation effect of the electrotome is not affected.

The above descriptions are only several embodiments of the present application, of course, cannot thereby limit the claim scope of the present application, and therefore equivalent changes made according to the claims of the present application are still included in the scope of the present application.