Capacitive type operation electrode circuit pad

Abstract

The invention discloses a capacitive type operation electrode circuit pad. The capacitive type operation electrode circuit pad disclosed by the invention is manufactured by taking polymer gel as an insulating medium and pouring the polymer gel on two surfaces of conductive fabric of a capacitance plate. In order to solve the condition that the capacitance plate and the insulating medium are in drum stratification, a plurality of rectangular array circular holes are machined in the capacitance plate as required in the capacitive type operation electrode circuit pad disclosed by the invention; the poured polymer gel is used for integrally connecting the gel on two surfaces of the capacitance plate via the circular holes in the capacitance plate; and the capacitance plate is fixed among gel layers, so that the insulating medium on two surfaces of the capacitance plate are not separated from the capacitance plate. A high-frequency electric knife has two circuit negative plate detecting modes; and in order to enable the capacitive type operation electrode circuit pad disclosed by the invention to be suitable for the two detecting modes, a group of RC (Resistor Capacitor) circuits are added between two circuit lead wires in the capacitive type operation electrode circuit pad disclosed by the invention, so that an effect after pasting one-time bipolar negative plate on a human body is imitated, the circuit pad can pass the detection of the bipolar circuit detecting mode of the electric knife and the normal use of the operation electrode circuit pad is guaranteed.

Description

technical field [0001] The invention belongs to the field of medical equipment, in particular to a capacitive surgical electrode loop pad. Background technique [0002] At present, when the known high-frequency surgical electric knife is operated on a patient, the high-frequency current generated by the high-frequency generator in the high-frequency electric knife is passed through the patient's body and fixed on the patient's body by a scalpel with a wire. The negative plate on the top forms a high-frequency current loop for surgical cutting and coagulation of tissue. In most applications, the high-frequency current passes through the patient through the active wire and the electrode (scalpel), and then returns to the high-frequency generator of the high-frequency electric knife from the negative plate and its wire fixed on the patient's body. Usually, the negative electrode plate is fixed on the patient's body by adhesive application, and a suitable position close to the ...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the use of the actual product, and sometimes it will cause certain electric burn damage to the patient and the change of the working state of the electrosurgical operation. The reason is that the material used as the insulating medium is to encapsulate the capacitor plate in two layers. In the insulating medium, because the area of ​​the capacitor plate is equal to that of the insulating medium, the insulating medium is completely separated into two pieces, and only the edge part is combined as a whole. However, this product needs to be made of very soft materials, and it will appear continuously during use. Kneading, folding, etc., will cause the insulating medium and the capacitor plate to be separated and delaminated, thus causing the instability of the capacitor, which will not only cause the change of the overall high-frequency current path impedance

[0004] It should be known to those skilled in the art: for high-frequency electrosurgical surgery, the active electrode (electrosurgical tip) of the electrosurgical knife at the contact point with the patient must be small in order to produce a high current density surgical effect that can cut and coagulate tissue, and transmit The effective area of ​​the return electrode (negative plate) at the point of communication with the patient of the same current as the active electrode (electrosurgical tip) should be large enough so that the density of electrosurgical current flowing from the patient to the return electrode (negative plate) is limited to Safe level, if the density of the electrosurgical current is higher at the return electrode, the temperature of the patient's skin tissue will rise in this area, causing unnecessary electrical burns

In non-contact negative plate products, the impedance in the loop is mainly determined by the capacitive reactance of the capacitor. Therefore, due to the separation of the capacitor plate from the insulating medium, the capacitance will decrease, that is, the capacitive reactance will increase, resulting in high-frequency current If the total impedance of the channel increases, the performance of the electric knife cutting and coagulation tissue will decrease, so that it cannot work normally. Even if the high-frequency electric knife has the function of detecting current changes, it will still greatly affect the surgical effect

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