Ablation needle for 915MHz energy-gathering microwave

Abstract

The invention discloses an energy-accumulating microwave ablation needle for 915 MHz, which relates to a disposable therapeutic device. The invention is mainly composed of an ablation needle head, an ablation needle tube and a handle, the tail part of the handle is provided with a fixed frame and an insert which is used for external connection, a coaxial cable connector and a connecting terminal are arranged on the fixed frame, the interior of the ablation needle tube is provided with a microwave coaxial cable and a stainless steel capillary, a temperature sensor is arranged on an end seal of the ablation needle tube, the connecting terminal which is used for connecting the temperature sensor is arranged on the fixed frame, a water inlet and a water outlet are arranged on the fixed frame at the tail part of the handle, and the water outlet is communicated with the ablation needle tube. The microwave ablation needle of the invention is used for the ablation treatment of tumors and lesion tissues, when the invention is worked at the 915MHz microwave condition, the microwave impedance matching is good, the ablation range is big and the coking range of the surrounding solidification region of the needle is small. The invention can be used for the treatment of the ablation of big tumors and tissues with the large lesion range.

Description

Technical field [0001] The present invention relates to a disposable treatment device, in particular to a 915MHz energy-concentrated microwave ablation needle used for microwave thermal ablation treatment directly implanted into tumor and diseased tissues. Background technique [0002] With the development of medical imaging technology, under the guidance of images, microwave ablation to treat tumors has become a new treatment method for tumor treatment. It is guided by images (ultrasound, CT, etc.) to accurately insert microwave therapy needles into human tumors. In tissues or diseased tissues, thermal ablation therapy is performed on the tumor. In the above treatment process, the current frequency of the ablation needle is 2450MHz, and the microwave wavelength of 2540MHz is 12.24cm. The penetration depth in the water-containing tissue can only reach 1.7cm. For the treatment of larger tumors, multiple needles must be inserted at the same time. It is easy to increase the risk of ...

AI Technical Summary

Problems solved by technology

In the above-mentioned treatment process, the current frequency of ablation needles is 2450MHz, and the microwave wavelength of 2540MHz is 12.24cm. The penetration depth in water-containing tissues can only reach 1.7cm. For the treatment of large tumors, multiple needles must be inserted at the same time. It is easy to increase the risk of trauma and treatment to the tissue of the treatment site

[0003] During the ablation treatment process of 2450MHz microwave, due to the high oscillation frequency and too concentrated energy, the tissue around the ablation needle has a large coking area, and the increase of the coking area will hinder the microwave radiation, making the ablation range not reach the proper volume

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