▎ 摘　　要

NOVELTY - The pipe has a conveying section (1) provided with an operating handle (3) and a conveying pipe (4). A conveying conduit is provided with a distal end and a proximal end. A freezing section (2) is connected with the distal end of the conveying conduit. The operating handle is connected with the proximal end of the conveying conduit. The freezing section is provided with a double-layer bag body for performing shrinking and expanding process, where a capsule film surface of the double-layer bag body is coated with a polymer film. The bag body is provided with an outer ball bag and an inner ball bag that is fixed in the outer ball bag. A vacuum pump body (31) is arranged in the operating handle. The conveying pipe is formed with a vacuum inner cavity, where gap between the outer ball bag and the inner ball bag is formed with the vacuum pump body through the vacuum inner cavity. The high thermal conductivity filler is made of a graphene material or a carbon fibre material. USE - Cryoablation pipe for performing paroxysmal atrial fibrillation of pulmonary vein of a patient. ADVANTAGE - The pipe deliverers refrigerant to a human tissue at low temperature of a balloon section so as to quickly cool the tissue and reduce treatment time and treatment cost. DETAILED DESCRIPTION - The polymer film contains high heat conductivity filler. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a cryoablation pipe for performing paroxysmal atrial fibrillation of pulmonary vein of a patient. Conveying section (1) Freezing section (2) Operating handle (3) Conveying pipe (4) Vacuum pump body (31)