#$%^&*AU2017202771B220180621.pdf#####ABLATION INSTRUMENTS WITH A MEMBER HAVING A TRIANGULAR CROSS-SECTION ABSTRACT An ablation needle assembly (40) comprising an outer member (42) defining a first lumen (82) an inner member (44) disposed within the first lumen (82) and defining a second lumen (84) and a feedline (46) disposed within the second lumen (84), wherein the first lumen (82) and the second lumen (84) cooperate to circulate fluid about the feedline (46), wherein one of the outer member (42) or inner member (44) has a triangular cross-section.1/7 C=)J C%4C% C*CN coo CW21 C%4