Cryoablation needle with double J-T grooves

Abstract

The invention discloses a cryoablation needle with double J-T grooves. The cryoablation needle comprises a vacuum wall and the J-T grooves, wherein the vacuum wall comprises a needle rod and an inner tube, a needle head is arranged at the far end of the needle rod; the inner tube penetrates through the needle rod, and an interlayer is formed between the inner tube and the needle rod; a first preset distance is formed between the far end of the inner tube and the far end of the needle rod; the J-T grooves comprise a first J-T groove and a second J-T groove, and the first J-T groove and the second J-T groove penetrate through the inner tube; in all sections of areas, distributed in the axis direction of the vacuum wall, of the vacuum wall, the section of area where the interlayer is located is a vacuum heat insulation area, and the section of area where the first preset distance is located is a target area; the far end of the first J-T groove is located in the target area; and the far end of the second J-T groove is located in the vacuum heat insulation area. Refrigerant fluid is introduced into the two J-T grooves with different far end positions, so that the cooling rate is greatly accelerated.

Description

technical field [0001] The invention relates to the technical field of cryoablation, in particular to a cryoablation needle with double J-T grooves. Background technique [0002] Cryoablation, a treatment modality that uses low temperature to destroy diseased tissue, is considered to be an efficient and minimally invasive method for treating malignant tumors. The cryoablation technique is easy to operate, has few complications, and can effectively relieve pain. At the same time, the boundary of the ice ball formed by ablation is clear and easy to observe. It can safely ablate lesions adjacent to large blood vessels or important organs; cryoablation can also use multiple needles to freeze , making the ablation range larger, suitable for large lesions and lesions with irregular shapes. [0003] During the freezing process of cells, extracellular ice crystals are first formed, causing the concentration of extracellular solutes to increase, resulting in a hypertonic environment...

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the above-mentioned prior art, the present invention proposes a cryoablation needle with double J-T grooves to solve the problem of slow cooling rate in the prior art

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