PAPAIOANNOU, ATHANASSIOS,BEECKLER, CHRISTOPHER THOMAS,GOVARI, ASSAF
申请号：
CA2916105
公开号：
CA2916105A1
申请日:
2015.12.22
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
A catheter has a multifunctional "virtual" tip electrode with a poroussubstrate and amultitude of surface microelectrodes. The surface microelectrodes are in closeproximity toeach other and in a variety of configurations so as to sense tissue for highlylocalizedintracardiac signal detection, and high density local electrograms andmapping. The poroussubstrate allows for flow of conductive fluid for ablating tissue. The surfacemicroelectrodescan be formed via a metallization process that allows for any shape or sizeand close proximity,and the fluid "weeping" from the porous substrate provides more uniformirrigation in the formof a thin layer of saline. The delivery of RF power to the catheter tip isbased on the principleof "virtual electrode," where the conductive saline flowing through the poroustip acts as theelectrical connection between the tip electrode and the heart surface. Thesubstrate and thesurface electrodes are constructed of MRI compatible materials so that thephysician canconduct lesion assessment in real time during an ablation procedure. Thesurface electrodesinclude noble metals, including, for example, platinum, gold and combinationsthereof.
