Double-layer cryogenic inflatable balloon

Abstract

The present invention provides a double-layer cryogenic inflatable balloon including an inflatable balloon assembly and a cryogenic balloon assembly. The inflatable balloon assembly includes an inflatable balloon, an outer catheter and a liquid-filling cavity provided with a liquid-filling chamber, the inflatable balloon, the outer catheter and the liquid-filling cavity being communicated with each other. The cryogenic balloon assembly includes a cryogenic balloon, an inner catheter and a fluid-diverting cavity provided with a gas return chamber as well as a gas inlet pipe and an inflation assembly, the cryogenic balloon, the inner catheter and the fluid-diverting cavity being communicated with each other, wherein the cryogenic balloon is located in the inflatable balloon, and the inner catheter is located in the outer catheter. The fluid-diverting cavity is further provided with a gas return channel, a liquid-filling channel, and a cork chamber, wherein the gas return channel has one end communicated with the gas return chamber and the other end communicated with the cork chamber. The liquid-filling channel has one end communicated with the cork chamber and the other end communicated with the liquid-filling chamber. The cork chamber is communicated with a gas return joint, and is internally provided with an adjustment structure. The fluid-diverting cavity is provided with a gas inlet chamber, and the gas inlet pipe penetrates through the cryogenic balloon, the inner catheter and the fluid-diverting cavity, the gas inlet pipe having one end located in the cryogenic balloon and the other end communicated with the gas inlet chamber. The gas inlet chamber is communicated with the inflation assembly, and the inflation assembly is used to input a refrigerant gas into the cryogenic balloon through a pipe.