Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210959
