Electrosurgical devices with choke shorted to biological tissue

摘要

A device for directing energy to tissue includes a feedline and a radiating portion electrically coupled to the feedline. The radiating portion includes a distal radiating section and a proximal radiating section. The feedline includes an inner conductor, an outer conductor and a first dielectric material disposed therebetween. The device also includes a choke disposed around at least a portion of the feedline. The choke includes a second dielectric material disposed around at least a portion of the outer conductor, wherein the second dielectric material includes at least one opening defined therein, and an electrically-conductive member disposed in the at least one opening electrically coupled to the outer conductor, wherein the electrically-conductive member is configured to contact tissue.

主权项

1. A method of directing energy to tissue, comprising:
positioning an antenna assembly for delivery of energy to tissue, wherein the antenna assembly includes a radiating portion, a feed point, and a choke electrically coupleable to tissue, the choke spaced apart from and disposed proximal to the feed point, the choke including an outer dielectric material defining an opening therethrough and an electrically conductive member disposed in the opening; transmitting energy from an energy source to the antenna assembly; and causing the energy to radiate through the radiating portion to tissue while shorting the electrically conductive member to tissue for blocking propagation of reflected energy towards the energy source.