Ablation devices with dual operating frequencies, systems including same, and methods of adjusting ablation volume using same

摘要

An ablation device includes a feedline including an inner conductor having a distal end, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween, an elongated electrically-conductive member longitudinally disposed at the distal end of the inner conductor and having a proximal end, a first balun structure disposed over a first portion of the outer conductor and positioned so that a distal end of the first balun structure is located at a first distance from the proximal end of the electrically-conductive member and a second balun structure disposed over a second portion of the outer conductor and positioned so that a distal end of the second balun structure is located at a second distance from the proximal end of the electrically-conductive member.

主权项

1. An ablation device, comprising:
a feedline including an inner conductor having a distal end and a first diameter, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween; an elongated electrically-conductive member longitudinally-disposed at the distal end of the inner conductor and having a proximal end and a second diameter different than the first diameter; a dielectric layer coaxially disposed around a first portion of the outer conductor; a first balun disposed over the first portion of the outer conductor and positioned so that a distal end of the first balun is located at a first distance from the proximal end of the elongated electrically-conductive member, the first balun including an electrically-conductive layer coaxially disposed around a proximal portion of the dielectric layer, wherein the dielectric layer extends distally beyond a distal-most end of the inner conductor; and a second balun disposed over a second portion of the outer conductor and positioned so that a distal end of the second balun is located at a second distance from the proximal end of the elongated electrically-conductive member.