BALLOON CATHETER AND ABLATION SYSTEM

The present invention relates to a balloon catheter and an ablation system. The balloon catheter includes a catheter body, a balloon, a temperature-sensing element and a restricting member. The balloon is disposed at a distal end of the catheter body. The temperature-sensing element includes a temperature-sensing module and a wire. The temperature-sensing module is disposed on the balloon or the catheter body, and part of the wire of the temperature-sensing element is arranged in a cavity of the catheter body so as to extend in an axial direction of the cavity of the catheter body. The restricting member is disposed within the cavity of the catheter body and configured to positionally restrict the wire of the temperature-sensing element within the cavity of the catheter body. According to the present invention, the restricting member restricts and protects the wire of the temperature-sensing element, thereby avoiding the risk of the wire being stretched and possibly broken during expansion or contraction of the balloon or during movement of the catheter. Moreover, the wire is avoided from hindering movement of the catheter body.