Cold and hot ablation apparatus with cold and heat accumulation devices

Abstract

The invention discloses a cold and hot ablation apparatus with cold and heat accumulation devices, the apparatus comprises a refrigerant container, a gas main and a cold/heat probe or a conduit, wherein the refrigerant container is connected with the gas main which is divided into two pipelines, one pipeline is connected with a gas inlet cold pipe, the other pipeline is connected with a gas inlet hot pipe, and the gas inlet cold pipe passing through a cold-accumulating heat exchanger is jointed with the gas inlet hot pipe passing through a heat-accumulating heat exchanger into one gas inlet pipe which is then is connected with the cold/heat probe or the conduit. One way of refrigerant in the refrigerant container used by the apparatus is pre-cooled firstly by the cold-accumulating heat exchanger, and then the refrigerant is used for cooling and freezing pathologically changed tissues through the cold/heat probe or the conduit.. The other way of refrigerant passes through the heat-accumulating heat exchanger and then heats the cold/heat probe or the head part of the conduit so that the temperature of the pathologically changed tissues is quickly reduced or the frozen pathologically changed tissues are molten, and then a series of inreversible injuries can be generated so as to achieve the aim of eliminating pathological changes.

Description

technical field [0001] The invention is a new type of cold and heat treatment equipment for diseased tissue, in particular to a cold and heat ablation equipment with a cold and heat storage device. Background technique [0002] Cryosurgery, also known as cryotherapy, refers to a clinical medicine that uses low-temperature equipment to cool, freeze and rewarm the lesion tissue in a controlled manner to cause irreversible damage and even necrosis. It can replace surgery, not only has minimal trauma, but also has the advantages of anesthesia and analgesia, reduced bleeding, mild reaction and prevention of tumor spread. The cryotherapy of tumor is to insert a cold and hot probe or catheter equipped with a thermocouple that can be individually controlled into the tumor tissue, and then apply low temperature to the head of the cold and hot probe or catheter to kill the tumor. The basic principle of cryotherapy for tumors is the formation of intracellular ice crystals and mechanic...

AI Technical Summary

Problems solved by technology

[0003]The argon-helium knife has excellent fast freezing performance, but it also has some shortcomings, such as: (1) The cooling and heating only depend on the pressure difference of the gas. Consumption, reduced cooling performance

(2) The working pressure of argon is high, so the safety requirements of the whole system are high, and the transportation is more troublesome

(3) Argon is a rare gas, and the cost is high. (4) High-pressure argon cylinders (40MPa) are not easy to obtain, and are limited to very few cities, which limits the promotion of argon-helium systems

[0004] As for the liquid nitrogen system, its biggest advantage is that it can provide a lower refrigeration temperature, but its disadvantages are: (1) Due to the low temperature of liquid nitrogen (-196°C), it is necessary to install the rear section of the cryoprobe Vacuum heat insulation is used to avoid frostbite to healthy tissue, resulting in a larger diameter of the cryoprobe; (2) The liquid nitrogen delivery pipeline has a large diameter due to the design of a thermal insulation layer, and there will be a certain degree of coldness during the operation due to the low temperature. Stiff, not good for doctors to use

(3) The temperature of the cryoprobe handle is low during the operation, and it is inconvenient for the doctor to hold it

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