Pre cooling type refrigeration method and pre cooling type treatment device for curing tumour

Abstract

A pre-cooling refrigeration method and device for tumor treatment, comprising a vacuum jacket, a probe head, and a mandrel installed in the jacket, and a spirally arranged low-temperature working fluid connected to a low-temperature working gas source is wound on the peripheral wall of the mandrel. Quality delivery pipe, the front section constitutes the first-stage heat exchanger, the rear section constitutes the second-stage heat exchanger, and the lower end is provided with a small throttling hole and extends to the lower part of the probe head; There is a throttling hole at the end of the tube, and the high-temperature working fluid in it is throttled and refrigerated, and then the low-temperature working fluid in the low-temperature working medium delivery pipe is precooled, and the low-temperature working fluid passes through the throttling hole at the end of the delivery pipeline again. One-time throttling refrigeration, after reaching the predetermined temperature, it is delivered to the probe head for tumor treatment. The device has low working pressure, is easy to obtain, and has high safety, economy and stability.

Description

field of invention [0001] The invention belongs to the technical field of cryotherapy for surgery, and in particular relates to a precooling refrigeration method and a precooling treatment device for tumor treatment. technical background [0002] Surgery, the destruction of living tissue structures by freezing cells, is commonly used to destroy cancer cells or benign tumors. Compared with open surgery, cryogenic surgery has many advantages: it is quick, almost painless, does not require local anesthesia, has no risk of postoperative infection, and leaves almost no scars. [0003] Mechanisms of cell destruction by cryosurgery are: [0004] 1. If the tissue is cooled slowly, water leaves the cells, increasing the concentration of harmful electrolytes in the cells, resulting in tissue necrosis; [0005] 2. If the tissue is cooled rapidly, many and tiny ice crystals will be formed, making the ice crystals thinner, and the cells are not easily damaged at this time. But during ...

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Problems solved by technology

[0006] 3. When metabolism continues, ice hinders the supply of cellular nutrients and the processing of metabolites, and cell death occurs

However, liquid nitrogen cryosurgical instruments are unsatisfactory in many respects

Evaporation of liquid nitrogen at the tip of the cryotip presents a serious problem: as it returns from the tip, the surrounding exhaust nitrogen heats part of the liquid nitrogen, which can evaporate the liquid nitrogen in the supply tube

However, the gas source pressure used by the argon-helium knife is very high, and the argon gas inlet pressure is higher than 210bar. It is specially prepared, and it is very difficult to obtain an air source, so the operation cost is also very high, and the cost of each operation exceeds 5,000 yuan

In addition, because the working pressure of argon gas is too high, that is, when the pressure drops to 210bar during use, it cannot be used, and a new argon gas bottle must be replaced in time, which results in the amount of gas available in a bottle It is very small, and one bottle of gas cannot even meet the needs of one operation, so the gas cylinder needs to be replaced during the operation, which causes great inconvenience to the operation and is likely to cause accidents

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