A kind of medical sympathetic nerve ablation may include the electrode assembly of catheter shaft, expandable members setting or connecting conduit axis and multiple elongations, each is configured to flexible circuit with multiple layers. Expandable members can be configured as mobile in unexpanded configuration and deployed configuration. The outer surface of multiple electrodes component can be arranged in expandable members. Each the multiple electrode assembly may include the tear-proof attribute of enhancing for example by the inclusion of a reinforcement structure and one or more layer electrode assemblies.
