The invention provides improved methods and devices for heating a thermally conductive fluid within an internal body organ to thermally ablate or necrose the body organ. In an exemplary embodiment, the invention provides a thermal ablation device having an elongate member with a proximal end and a distal...http://www.google.se/patents/US5653692?utm_source=gb-gplus-sharePatent US5653692 - Method and system for direct heating of fluid solution in a hollow body organ