Radiofrequency ablation electrode with homogeneous surface temperature

Abstract

The invention provides a radio-frequency ablation electrode with uniform surface temperature, which comprises a radio-frequency needle, a control collector, a gas container, an exhaust cavity and a gas receiving vessel, wherein the surface of the radio-frequency needle is coated with an insulating layer, and a needle point is exposed; the radio-frequency needle is hollow, and a gas conveying pipe, a temperature sensor and a radio-frequency wire are arranged inside the radio-frequency needle; both ends of the temperature sensor and the radio-frequency wire are connected with the tip of the radio-frequency needle and the control collector respectively; the gas conveying pipe is connected with the gas container; and gas is filled into the gas container which has certain initial pressure. By adoption of the arrangement, uniform surface temperature of the needle point can be realized by utilization of heat exchange between the gas and the needle point, so as to prevent carbonization, thereby the radio-frequency ablation electrode can be widely applied to pathological tissues.

Description

technical field [0001] The invention relates to a radiofrequency ablation electrode, in particular to a radiofrequency ablation electrode for tumor treatment. Use the gas to exchange heat with the needle tip to make the surface temperature of the needle tip uniform and prevent carbonization of the radio frequency ablation electrode. Background technique [0002] Radiofrequency ablation has been widely used in the treatment of various diseases including liver tumors, breast tumors, prostate tumors and brain tumors. Radiofrequency ablation of tumors is to insert a radiofrequency needle into the diseased tissue, contact the negative plate or another electrode with the human body, and apply the alternating high-frequency electromagnetic waves generated between the two to make the direction of ion movement in the tumor tissue change alternately, and the kinetic energy of the ion is converted into The thermal energy causes the temperature of the diseased tissue to rise, so as to ...

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Problems solved by technology

[0005] The above invention uses a solution (such as water or salt water) to exchange heat at the tip of the needle, but due to the limited size of the water inlet and outlet pipes, the flow rate of the solution is slow and the flow rate is not large. When the temperature of the electrode needle is high, the flow resistance is large, resulting in a The thermal efficiency is not high, and the temperature of the RF needle cannot be made uniform so as to effectively prevent carbonization

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