Cryoablation needle for achieving rewarming and thermotherapy functions through electrically heated wire

Abstract

The invention relates to a cryoablation needle for achieving rewarming and thermotherapy functions through an electrically heated wire. An air bottle is connected with a flexible cold knife through afreezing host, the cold knife is composed of a knife head, a J-T groove, the electrically heated wire, leads, a finned tube, a mandrel, a vacuum layer, an air return tube and an air inlet tube, the vacuum layer is arranged in the rear of the knife head, the J-T groove is arranged in the knife head, the rear end of the J-T groove is connected with the finned tube, the mandrel is arranged in the finned tube, the electrically heated wire is placed on the outside of the J-T groove, the electrically connected wire is connected with a switch power supply in the freezing host through the leads, the knife head is connected with the freezing host through the air return tube and the air inlet tube, and air enters the cryoablation needle in the needle-inserting direction and performs rewarming or thermal ablation on external tumor tissue after heated by the electrically heated wire of the knife head during entering. The homologous air is adopted for rewarming or thermotherapy, use of other heat medium is avoided, the cryoablation needle is simple in structure and high in heating efficiency and speed, and a more radical, cheaper and more effective inactivating program is provided for tumor ablation treatment.

Description

technical field [0001] The invention relates to a cryoablation medical device, in particular to a cryoablation needle which uses an electric heating wire to complete rewarming and thermotherapy functions, and belongs to the technical field of thermotherapy cryoablation needles. Background technique [0002] Due to factors such as population aging, bad living habits, environmental pollution, and low cure rate by traditional means, my country has become a major country in cancer incidence and death. According to statistics from the National Cancer Registry Center, there were 4.2916 million new cancer cases and 2.8142 million deaths in China in 2015. Due to untimely diagnosis and lack of individualized treatment plan, the inefficiency of cancer treatment is as high as 75%. [0003] Minimally invasive treatment is one of the frontiers in the development of medical science and technology at home and abroad, and the corresponding technology has become the commanding height of dev...

AI Technical Summary

Problems solved by technology

However, the helium rewarming method needs to introduce another medium to generate heat, which increases the complexity of the host pipeline, and because helium is expensive and difficult to obtain, it limits the promotion of this technology

The cryotherapy system produced by Shanghai Guidance Medical System Co., Ltd. (targeted Knife) and the flexible cold knife system through the natural cavity, both use nitrogen or argon as the freezing medium, and the low-temperature cryotherapy system (AT-2008-II) uses radio frequency rewarming. If the layer of hockey puck is used, it is difficult for the radiofrequency current to pass through, and thus cannot produce a good heating effect, resulting in a long rewarming time for this rewarming method and low surgical efficiency

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