Single-needle bipolar radiofrequency ablation electrode needle and radio-frequency electrode bare area adjusting method thereof

Abstract

The invention discloses a single-needle bipolar radiofrequency ablation electrode needle which comprises a main electrode needle body and an insulated handle pipe, wherein the front end of the insulated handle pipe is sleeved with the main electrode needle body; the insulated handle pipe is shorter than the main electrode needle body; the main electrode needle body comprises a positive electrode body, an insulator and a negative electrode body; the positive electrode body and the negative electrode body at the end parts of the main electrode needle body are arranged on two sides of the insulator in a bilateral symmetric manner, and the insulator insulates the positive electrode body and the negative electrode body; the insulated handle pipe moves in the length direction of the main electrode needle body, so that bare areas of the positive electrode body and the negative electrode body on the main electrode needle body are changed simultaneously, the electrode needle tip part of the positive electrode body or / and the negative electrode body on the main electrode needle body as well as a to-be-ablated area of the bare area of the positive electrode body or / and the negative electrode body is / are controlled by adjusting the insulated handle pipe, and further, the range of tumor radiofrequency ablation treatment is controlled. The invention provides a bare area adjusting method of the single-needle bipolar radiofrequency ablation electrode needle.

Description

【Technical field】 [0001] The invention relates to a medical instrument of radiofrequency ablation technology, in particular to a single-needle bipolar radiofrequency ablation electrode needle and a method for adjusting its exposed area. 【Background technique】 [0002] There are various types of radiofrequency ablation electrode needles available. As far as electrodes are concerned, there are single-needle single-electrode type, multi-needle single-electrode type, and single-needle double-electrode type. Among them, the single-electrode type needs to be used in conjunction with the negative plate, which is prone to incomplete ablation process; the two electrodes of the existing single-needle dual-electrode type are respectively installed in two different areas before and after the needle and the needle tube, but the needle and the needle tube are used as The conductive surface area of ​​the two radio frequency electrodes should be roughly equal, so it is necessary to install ...

AI Technical Summary

Problems solved by technology

Among them, the single-electrode type needs to be used in conjunction with the negative plate, which is prone to incomplete ablation process; the two electrodes of the existing single-needle dual-electrode type are respectively installed in two different areas before and after the needle and the needle tube, but the needle and the needle tube are used as The conductive surface area of ​​the two radio frequency electrodes should be roughly equal, so it is necessary to install an insulating coating on the outer wall of the rear section of the needle tube, so that the exposed outer wall area of ​​the needle tube is equal to the outer surface area of ​​the needle body, that is, the two electrodes of the radio frequency electrode are in the whole The needle body is symmetrical up and down, which increases the difficulty of the manufacturing process; and the exposed area of ​​the needle is fixed, so the outer areas of the two electrodes of the radio frequency electrode are fixed, which cannot be adjusted according to the size of the tumor, that is, the ablation treatment range of the radio frequency needle cannot be adjusted

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