Patent ID: 6245062
Filing Date: 2001-06-12
Classification: A61B

Abstract:
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising:a cradle device having a central axis disposed about the antenna in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; andan insert device defining a recess formed and dimensioned for receipt of said antenna therein in a manner substantially isolating said antenna from direct contact with said cradle device, said recess having a longitudal axis off-set from the central axis of said cradle to position said antenna substantially proximate to and adjacent said window portion.