Air-core microwave ablation antennas

Details Air-core microwave ablation antennas Air-core microwave ablation antennas

2007-07-17

2007-07-17

Peffley, Michael (Department: 3739)

Surgery

Instruments

Electrical application

C607S101000, C607S154000, C607S156000

Reexamination Certificate

active

11236985

ABSTRACT:
A method and device delivers microwave power to an antenna through a coaxial cable utilizing air or other gases as its dielectric core. The cable includes supports made of low-loss materials to keep the inner conductor centered in the cable, and defining spaces therebetween for the air or gas. Channels in the supports allow the air or gas to circulate in the cable. The gas may be chilled or cooled to provide an addition level of heat dissipation. The device enables delivery of large amounts of power to tissue without undue heating of the feed cable or peripheral tissues, and without increasing the diameter of the feeding cable or antenna, keeping the antenna safe for percutaneous use.

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