Patent ID: 8231618
Filing Date: 2012-07-31
Classification: A61B,A61M

Abstract:
1. An energy delivery apparatus for delivering electrical energy at a target location, said energy delivery apparatus being navigable with an applied magnetic field, the energy delivery apparatus comprising: an elongate electrical conductor, having a distal section that is narrower than a proximal section; an electrode for delivering said electrical energy at said target location, the electrode being disposed adjacent the distal end of the distal section of the elongate electrical conductor and being electrically coupled to said electrical conductor; a first insulating dielectric coating along a substantial portion of the length of the proximal section of the elongate electrical conductor, the insulating dielectric coating having a dielectric constant smaller than about 3; a second insulating dielectric coating over the distal section of the elongate electrical connector; at least one guiding element comprising a magnetically responsive material mounted on the distal section of the elongate electrical conductor, over the second insulating dielectric coating, the at least one guiding element being proximal to and spaced from the electrode; a heat shield on the distal section of the elongate electrical conductor, between the electrode and the least one guiding element; and a coating over at least a proximal portion of the distal section of the elongate electrical conductor, the coating extending over the at least one guiding element, so that the external diameter of the device adjacent the proximal portion of the distal section of the elongate electrical conductor is substantially the same as the diameter of that device at the proximal section of the elongate electrical conductor.