Internally cooled microwave ablation needle with expansion balloon

Abstract

The invention relates to an internal-cooling microwave ablation needle provided with an implanted balloon. A microwave antenna is insulated from an internal cooling system through a microwave antenna liner tube, the internal cooling system is in positioning connection with an outer tube through an adapter tube and a sealing tube, and the balloon is located between a targeted area and a non-targeted area of the microwave ablation needle and connected with a J-T spray tube through the adapter tube; the J-T spray tube is connected with a finned tube, the balloon is filled with fluid through the adapter tube, the balloon after filling of the cooling fluid is expanded and has a fastening effect with surrounding tissue; when low-temperature gas is introduced, small frozen areas are produced around the balloon under the action of the throttling effect of the J-T spray tube, and the fixing function is realized; a vacuum wall is arranged on the inner side of the outer tube, so that the fluid in the outer tube is in heat insulation from biological tissue outside the outer tube, and normal tissue is protected from cold injuries. The internal-cooling microwave ablation needle can be effectively prevented from displacement with shrinking deformation of heated biological tissue in an ablation process, and has the advantages that an ablation area is positioned more accurately, fewer normal tissue injuries are caused, the risk of the needle track implantation of tumors is lower and the like.

Description

technical field [0001] The invention relates to a microwave ablation medical device, in particular to an inner cooling microwave ablation needle. Background technique [0002] Tumor is one of the most important problems that endanger human health. In recent years, with the continuous development of science and technology and medical level, minimally invasive tumor ablation has become a hot spot. Minimally invasive tumor ablation is at the forefront of the development of clinical tumor medicine at present. Compared with traditional tumor treatment methods such as surgical resection, radiotherapy, and chemotherapy, it has the advantages of less harm to the human body and fewer postoperative complications. [0003] Microwave ablation is one of the representative ablation techniques. Microwave ablation uses the thermal effect of microwaves on biological tissues to rapidly heat up and denature diseased tissues to achieve therapeutic purposes. In recent years, microwave ablatio...

AI Technical Summary

Problems solved by technology

During the microwave ablation process, the microwave ablation needle is prone to displacement with the heat shrinkage and deformation of the surrounding tissue, which brings adverse clinical consequences: 1. The ablation area deviates from the tumor area, which affects the surgical effect and may damage normal tissues; 2. May cause tumor Needle tract planting, causing tumor spread

[0009] Microwave ablation surgery mainly relies on imaging tools such as B-ultrasound or CT for navigation and positioning. It is difficult to observe changes in the position of microwave needles in real time. position change

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