Title :
Spiraled-helix antenna for catheter ablation of myocardial tissue using microwave energy
Author :
Mirotznik, Mark S. ; Bogen, Daniel ; Foster, Kenneth
Author_Institution :
Dept. of Bioeng., Pennysylvania Univ., Philadelphia, PA, USA
Abstract :
The design and characterization of an antenna for catheter ablation using microwave energy are described. The goal is to allow controllable destruction of endocardial tissue containing abnormal conduction pathways. The antenna is based on a helical coil antenna. The antenna is constructed from a length of coaxial transmission line in which the center conductor is extended and wound in a spiral of approximately 1 cm diameter, so the antenna contacts the tissue in a disk-shaped pattern about 1 cm across. The heating occurs in the near field of the antenna, producing a shallow, disk-shaped region of ablated tissue. Preliminary results show that this antenna design is suitable for producing broad, shallow lesions in tissue
Keywords :
biomedical equipment; cardiology; microwave antennas; muscle; radiation therapy; radiofrequency heating; surgery; ablated tissue; abnormal conduction pathways; broad shallow lesions; catheter ablation; center conductor; coaxial transmission line; controllable destruction; design; disk-shaped pattern; endocardial tissue; heating; helical coil antenna; microwave energy; myocardial tissue; shallow disk shaped region; spiraled helix antenna; Catheters; Coaxial components; Coils; Conductors; Electromagnetic heating; Helical antennas; Microwave antennas; Myocardium; Transmission line antennas; Wounds;
Conference_Titel :
Bioengineering Conference, 1990., Proceedings of the 1990 Sixteenth Annual Northeast
Conference_Location :
State College, PA
DOI :
10.1109/NEBC.1990.66317
