Patent ID: 7905879

Claim:
A catheter system comprising: a flexible catheter having a proximal end, a distal end, a first fluid flow path, and a second fluid flow path; a first coupling body having a first electrical connector and defining a first passage and a second passage; a second coupling body having a second electrical connector and defining a third passage and a fourth passage, the coupling bodies being releasably coupled to each other in a coupled configuration; such that in the coupled configuration, the electrical connectors are in electrical contact, the first passage and the third passage are in fluid communication with each other and with the first fluid flow path, and the second passage and the fourth passage are in fluid communication with each other and with the second fluid flow path; a pressure sensor in fluid communication with one of the first and second fluid flow paths; a source of fluid refrigerant in fluid communication with the first fluid flow path; and a shutoff element coupled to the pressure sensor and terminating fluid flow through the first fluid flow path upon leak detection.