Flexible freezing spray pipe for intra-airway spray freezing treatment and use method of flexible freezing spray pipe

Abstract

The invention relates to a flexible freezing spray pipe for spraying freezing treatment in an airway, and the spray pipe comprises a high-pressure spray pipe and a return pipe sleeved outside the high-pressure spray pipe; an annular return space is formed between the return pipe and the high-pressure spray pipe, a plurality of spraying holes are formed in the end face of one end of the return pipe, one end of the high-pressure spray pipe is provided with an opening, the opening end of the high-pressure spray pipe directly faces the spray hole of the return pipe, and the other end of the high-pressure spray pipe is connected with high-pressure gas-liquid CO2. According to the flexible freezing spray pipe for the in-airway injection freezing treatment, CO2 is adopted as a refrigerant, the freezing effect is generated at the top end of the guide pipe through gas release and rapid expansion, the lowest temperature of the top end of a probe can reach about-80 DEG C, and the temperature is not low as liquid nitrogen, so the flexible freezing spray pipe is relatively safe to the airway, high-pressure CO2 is prevented from being directly injected into the airway, and the damage to the air passage is reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a flexible cryo-nozzle used for jet cryotherapy in the airway and a usage method thereof. Background technique [0002] Cryotechnology has been used in the diagnosis and treatment of airway diseases for more than 40 years. The traditional cryoprobe needs to directly contact or insert the cryoprobe into the diseased tissue. Due to the limited surface area of ​​the probe, the effect is usually slow and time-consuming, and it is applicable to a wide range of patients. small lesions. The jet freezing technology is the same as the traditional freezing, and the basic equipment includes a cooling source, a control device, and a freezing nozzle. [0003] At present, the main application is the spray freezing equipment with liquid nitrogen as the refrigerant and the corresponding nozzle. Liquid nitrogen changes from a liquid state to a gaseous state to absorb surrounding heat, which can m...

AI Technical Summary

Problems solved by technology

Due to the high pressure of the gas, CO 2 The ends of the cryogenic nozzles that are refrigerants are sealed, and they are directly in contact with or inserted into the diseased tissue in the form of a cryoprobe. Due to the limited surface area of ​​the probe, the effect is usually slow and time-consuming, and it is suitable for small-scale lesions. Cannot achieve the effect of jet cryotherapy

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