A microwave ablation antenna for the treatment of large liver cancer

Abstract

The invention relates to a microwave ablation antenna for large hepatic cellular cancer treatment. The microwave ablation antenna for large hepatic cellular cancer treatment comprises a zirconia puncture head, a pole core, a coaxial cable, a water diversion pipe and a needle rod. The zirconia puncture head is provided with an axial center blind hole, the pole core is inserted into the the center blind hole of the zirconia puncture head, the rear end of the pole core is in cold pressing fixed connection with an inner conductor of the coaxial cable, a metal choking ring sleeves the coaxial cable, the front end of the choking ring is mounted on the outer circle on the rear portion of the zirconia puncture head in a sleeving mode, the front end of the needle rod is mounted on the outer circle on the rear portion of the choking ring in a sleeving mode, and the front end of the water diversion pipe is fixed to the rear end of the choke ring. The microwave ablation antenna for large hepatic cellular cancer treatment is ingenious in structure and easy to machine. The choking is specially arranged and is in short circuit with an outer conductor of the thickened coaxial cable for ensuring that the antenna is wide in ablation range and round in ablation. The parameters of the choking ring and the coaxial cable are particularly important, so that the effective heating area (the ablation range) of the antenna can reach 4.5*5.5 cm or larger, and the antenna is suitable for large hepatic cellular cancer interventional ablation treatment.

Description

technical field [0001] The invention relates to a microwave ablation antenna for treating large liver cancer, and belongs to the technical field of microwave ablation needles. Background technique [0002] With the advancement of modern technology and oncology, domestic microwave tumor ablation technology has made breakthroughs in the past ten years. Microwave tumor ablation is to use microwave energy to act on tissues to produce thermal effects. Within a few minutes to tens of minutes, the central temperature of the thermal field can reach above 100°C. Purpose of ablation therapy. Microwave tumor ablation is to insert a microwave ablation needle into the lesion of human tissue, and the front end continuously emits microwave energy to perform the operation. Because of its high efficiency, small wound, and controllable depth and range of effect on the tissue, it is suitable for Ablation of solid tumors throughout the body. [0003] The existing ablation antennas all have a...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the ablation diameter, it cannot adapt to the ablation treatment of large liver cancer, and the ablation range of the traditional ablation antenna is relatively ellipsoidal, which is not conducive to the surgical control of the treating physician.

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