The dilatation
balloon device comprises a
catheter, a first
balloon body, a protruding structure and a connecting piece, the
catheter extends in the front-back direction, a first channel penetrating in the front-back direction is formed in the
catheter, the first
balloon body is arranged at the front end of the catheter, the front end of the first channel is communicated with the interior of the first balloon body, and the rear end of the first channel is communicated with a pressurizing device. The protruding structures are arranged on the outer surface of the first bag body in a protruding mode and distributed in a long shape extending in the front-back direction, in a
projection view perpendicular to the front-back direction, the protruding structures are distributed on the periphery of the first bag body in a non-centrosymmetric mode, and the connecting piece is arranged at the rear end of the catheter and used for communicating the first channel with the pressurizing device. In the invention, the bulge structure can apply pressure to the affected part in a targeted manner, so that the affected part is cracked before other tissues in the bulge process of the first
capsule body, and the treatment purpose is achieved. Therefore, the treatment accuracy can be improved, unnecessary tearing of healthy tissues is reduced, the complication risk is reduced, and the minimally invasive treatment requirements of diseases such as benign prostatic
hyperplasia are met.