Patent ID: 8292880

Claim:
A microwave tissue treatment device, comprising: an antenna assembly including: an elongate member defining a longitudinal axis and having proximal and distal ends; an outer conductor and an inner conductor each disposed within the elongate member and extending along the longitudinal axis, wherein at least a portion of the inner conductor is configured to be deployable from the outer conductor such that the antenna assembly may transition from a first position to a second position; a dielectric material disposed at least in part between the outer conductor and the inner conductor; and a sleeve at least partially disposed about a distal portion of the inner conductor and defining at least one cavity, the at least one cavity having a proximal end and a distal end, wherein at least a portion of the sleeve is configured to be deployable from within a lumen defined by a distal portion of the outer conductor; the dielectric material including a distal portion at least partially disposed within the lumen between the sleeve and the distal portion of the outer conductor; and a cooling system including at least one inflow member and at least one outflow member, the at least one inflow member and the at least one outflow member disposed in fluid communication with the at least one cavity defined by the sleeve, the at least one inflow member and the at least one outflow member configured to circulate at least one fluid within the at least one cavity such that at least a portion of the inner conductor is in fluid contact with the at least one fluid.