The invention relates to a novel intraluminal tumor
cryosurgery ablation catheter and an operation method thereof. The novel intraluminal tumor
cryosurgery ablation catheter comprises a
balloon, an air inlet pipeline, an air return pipeline, a vacuum pipeline, and an air inlet connector, an air return connector and a vacuum connector, which are respectively connected with near ends of the air inlet pipeline, the air return pipeline and the vacuum pipeline in seal mode, wherein the vacuum pipeline is located on the exteriors of the air inlet pipeline and the air return pipeline. The novel intraluminal tumor
cryosurgery ablation catheter further comprises a buffer unit, wherein the buffer unit is arranged at the far end of the air inlet pipeline, and arranged in the
balloon, the buffer unit is provided with a buffer air outlet, the near end of the buffer unit is connected with the far end of the air inlet pipeline or the air return pipeline in seal mode, the far end face of the
balloon is in a concave shape, the far end of the buffer unit is connected with the far end of the balloon in seal mode, and a connection point between the far end of the buffer unit and the balloon is arranged at the middle of the concave portion of the far end of the balloon or in the far end of the balloon. The novel intraluminal tumor cryosurgery ablation catheter cooperates with an
endoscope so as to adapt to complex cavity environments, and the far end of the balloon is large in contact area, and thereby guarantees a large freezing range.