Novel bipolar ablation needle

Abstract

Disclosed is a novel bipolar ablation needle. The novel bipolar ablation needle is characterized by comprising a needle rod (1), a needle head (2), an inner insulation casing tube (3), an electrode casing tube (4), an outer insulation casing tube (5), an isolation insulation layer (6) and a first PTC casing tube (7). The needle head (2) and the needle rod (1) are integrated, the needle head (2) is arranged at one end of the needle rod (1), has the large diameter and is sharp, the isolation insulation layer (6) is arranged at the position, close to the needle head (2), of the needle rod (1) in a sleeved mode, the inner insulation casing tube (3), the electrode casting tube (4) and the outer insulation casing tube (5) are sequentially arranged at the position, on one side of the isolation insulation layer (6), of the needle rod (1) , and the needle head (2) on the other side of the isolation insulation layer (6) is provided with the first PTC casing tube (7). The novel bipolar ablation needle is not sticky when achieving tissue coagulation by means of the characteristic of a PTC thermistor, and rebleeding complications and other risks are avoided.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a novel ablation bipolar needle. Background technique [0002] Radiofrequency ablation (RFA) is a minimally invasive interventional treatment method. In 1990, Rossi and Mcgahan first reported that RFA was applied to the ablation of animal liver tissue, and then used this technology to treat human liver tumors. At present, RFA technology has been widely used in the treatment of diseases in various organs of the body. In addition to inactivating tumors, it can also reduce tumor burden to relieve pain and reduce hormone secretion. Hypersplenism (hypersplenism), etc. RFA is a hyperthermia method for tumors. Its basic principle is to use thermal energy to damage tumor tissue, and the electrodes emit radio frequency waves to make the ions and polar macromolecules in the surrounding tissue oscillate, collide and generate heat by friction, and heat the tumor area to the effe...

AI Technical Summary

Problems solved by technology

[0004] Impedance control adopts an impedance of 400-500 ohms, but it is difficult to adjust the specific impedance flexibly. If the impedance is too small, the ablation will end early, and if the ablation is not complete, if the impedance is too large, it will easily lead to tissue sticking

[0005] Temperature control usually sets 105 degrees Celsius as the temperature threshold, which can easily lead to uneven local ablation

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