A conformal microwave antenna applicator for circumferential ablation

Author

Zeji Gu ; Rappaport, C.M. ; Wang, P.J. ; Wei Zhu

Author_Institution

Skyworks Solutions, Inc, Woburn, MA, USA

Volume

1

fYear

2003

Firstpage

391

Abstract

This paper presents a circumferential tissue ablation device used to form a circumferential conduction block in a pulmonary vein. The circumferential ablation element includes an expandable balloon that is adapted to conform to the pulmonary vein (PV) in the region of its ostium; a microwave transducer is provided and conformed to the balloon´s skin, which can form the circumferential ablation by transmitting microwave energy. The microwave transducer includes a mechanism of impedance tuning by which the microwave ablation catheter system can match the impedance of its power supply with the transmission line to minimize reflected power and optimize energy delivery to targeted tissues.

Keywords

biomedical equipment; cardiology; microwave antennas; radiation therapy; arrhythmia circuit; arrhythmia treatment; arrhythmic focus removal; arrythmogenic focus; circumferential conduction block; energy delivery optimization; expandable balloon; impedance tuning mechanism; localized injury; microwave transducer; ostium; pulmonary vein; reflected power minimization; targeted tissues; transmission line; Applicators; Catheters; Impedance; Microwave antennas; Microwave devices; Power supplies; Power transmission lines; Skin; Transducers; Veins;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2003 IEEE MTT-S International

Conference_Location

Philadelphia, PA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7695-1

Type

conf

DOI

10.1109/MWSYM.2003.1210959

Filename

1210959