Surgical system for the percutaneous creation of an arteriovenous fistula (AVF)

A system for connecting a first body cavity and a second body cavity within the body of a patient, the system comprising:

• a) a first source device suitable for location in a first body cavity, the first source device comprising at least one signal electrode configured as a conductor to detect or carry an electric potential and capable of generating an asymmetric electric field independently and when the first source device is located in the first body cavity, the asymmetric electric field having a signal amplitude that varies depending on an angle of rotation of the first source device;
• b) a second device suitable for location in a second body cavity adjacent to the first body cavity, the second device comprising at least one detector for detecting the asymmetric electric field generated by the at least one signal electrode when the first source device is located in the first body cavity;
• and
• c) connection apparatus for connecting the first body cavity and the second body cavity;
• wherein in use, the connection between the first body cavity and the second body cavity is directed by aligning the first source device with the second device via the asymmetric electric field generated by the at least one signal electrode being detected by the second device, and delivering the connection apparatus along the direction indicated by the alignment.