A medical probe device for contacting tissue within the body a catheter tube having a control end and a probe end. The probe end includes a housing having a port. An element is located within the housing that is movable between a first position confined within the housing and a second position extending...http://www.google.es/patents/US5921982?utm_source=gb-gplus-sharePatente US5921982 - Systems and methods for ablating body tissue
