ASHTON, JOHN H.,CLARK, JEFFREY L.,KAMIN, GEORGE,KEYES, JOSEPH
申请号：
CA2875161
公开号：
CA2875161A1
申请日:
2014.12.15
申请国别(地区):
CA
年份:
2015
代理人:
摘要：
A catheter comprises an elongated catheter body, a control handle, and ahollow tipelectrode having a radially-symmetrical shell defining a cavity surrounding acenter innerlocation from which light is emitted to pass through a plurality of openingsformed in the shellfor interaction with tissue and/or fluid, such as blood, outside of and incontact with the shell.Light interacting with tissue is reflected back into the cavity for collectionwhereas lightinteracting with fluid, such as blood, is absorbed. By analyzing the lightcollected in the cavity,a determination is made as to a ratio of light reflected by tissue versuslight absorbed by fluidfor indicating the amount of contact between the tip electrode and tissue.Alternatively,fluorescence may similarly be employed (light is emitted at one wavelength anddetected at oneor more different wavelengths) since tissue and blood have differentfluorescence properties atvarious wavelengths. An integrated ablation and spectroscopy system furthercomprises an RFgenerator, a light source and a light analyzer adapted to analyze the lightcollected in the cavity.
