Cyopexor for treating pre-auricular fistula

Abstract

The invention relates to the technical field of medical apparatuses, in particular to a cryopexor for treating a pre-auricular fistula. The cryopexor comprises a liquid nitrogen bottle, a low-temperature compensation bottle, a PTC heater and a controller, wherein the liquid nitrogen bottle is connected with the low-temperature compensation bottle, a hose is connected to an input port of a miniature vacuum pump, a cryopexor head is connected to an output port of the miniature vacuum pump, and the PTC heater is arranged in a transparent hood; the transparent hood is further internally provided with a temperature sensor, a refrigeration electric pile is arranged in the low-temperature compensation bottle, and the controller is in controlled connection with the miniature vacuum pump, the PTC heater and the temperature sensor. By means of the cryopexor, the temperature rise of liquid nitrogen can be lowered to the greatest extent, and the original temperature environment of the liquid nitrogen is maintained so that the liquid nitrogen can achieve the best cryotherapy effect; the stability of the liquid nitrogen is guaranteed; through the arrangement of the transparent hood, the situation that the liquid nitrogen sprayed out of the cryopexor head escapes out of the transparent hood can be avoided so that the liquid nitrogen can be in the transparent hood for a long time, and thus thepre-auricular fistula and a surrounding chronic infection focus of a patient are subjected to better cryotherapy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a refrigerator for treating preauricular fistula. Background technique [0002] Preauricular fistula is a congenital defect caused by congenital underdevelopment. The opening of preauricular fistula is mostly located in front of the crus of the helix, and a few can be located in the triangular fossa of the auricle or the cavity of the concha. Usually asymptomatic. When pressing, there may be a little thin mucus or milky white sebum-like substance overflowing from the fistula opening, and the local area feels itchy and uncomfortable. Asymptomatic or non-infected persons may not be treated. When local itching or pricking occurs, there is discharge overflowing. Sometimes there is often a little white discharge with a slight smell around the small eyes when gently squeezed. [0003] In the prior art, after the infection of the preauricular fistula, it is generally removed...

AI Technical Summary

Problems solved by technology

But this utility model also has the following problems: the one, because liquid nitrogen directly reaches freezing head through flexible pipe from liquid nitrogen container, because liquid nitrogen is easy to absorb heat in this process, heats up faster, causes physiotherapy effect relatively poor; The spontaneous conduction of nitrogen from the hose to the freezing head is relatively slow. Third, the residence time of liquid nitrogen in the freezing head is short, so the treatment effect on the lesion or the surrounding parts is not good, and the temperature of the freezing head is too low during the treatment. case of frostbite

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