Tunable microwave ablation catheter

Details Tunable microwave ablation catheter Tunable microwave ablation catheter

1993-12-03

1995-04-11

Pellegrino, Stephen C.

Surgery

Instruments

Electrical application

606 33, 606 34, 606 42, 607101, 607156, A61B 1739

Patent

active

054053463

ABSTRACT:
An ablation catheter is disclosed that include a mechanism for altering the impedance of the antenna during use in a controlled manner to tune the catheter. The impedance tuning may be accomplished in a variety of manners including altering the electromechanical configuration of the antenna and moving a material relative to the antenna or vice versa in order to vary the effective impedance during use. In a preferred embodiment, the ablation catheter transmits energy in the microwave frequencies and uses a coaxial transmission line as its waveguide. The antenna is preferably helical in nature and is carried by the distal end of the transmission line.

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Landberg et al., "Catheter Ablation of the Artrioventricular Junction Using a Helical Microwave Antenna: A Novel Means of Coupling Energy to the Endocardium", PACE, vol. 14, Dec. 1991, pp. 2105-2113.

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