The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2012
Filed:
Oct. 23, 2006
Chad Allen Lieber, Chino Hills, CA (US);
Ariel Garcia, Duarte, CA (US);
Shiva Sharareh, Laguna Niguel, CA (US);
Chad Allen Lieber, Chino Hills, CA (US);
Ariel Garcia, Duarte, CA (US);
Shiva Sharareh, Laguna Niguel, CA (US);
Biosense Webster, Inc., Diamond Bar, CA (US);
Abstract
A system and method that enable real-time optical measurements of tissue reflection spectral characteristics while performing ablation, involves the radiation of tissue and recapturing of light from the tissue to monitor changes in the reflected optical intensity as an indicator of steam formation in the tissue for prevention of steam pop. The system includes a catheter adapted to collect light reflected from tissue undergoing ablation, a detection component that identifies and separates constituent wavelengths of collected light, a quantification apparatus for generating measured light intensity data for the collected light, and a processor that analyses the measured light intensity data in relation to time. The system may include a graphical display and/or an audio output (e.g., speaker) that provide visual and/or audio alarm when the system infers formation of a steam pocket in the tissue. The method for monitoring formation of steam pocket during ablation, wherein a measured reflectance spectral intensity MRSI versus time is analyzed, includes delivering light to tissue, delivering energy for ablation at tissue and measuring the reflectance spectral intensity of the tissue, wherein observation is made as to whether the MRSI initially increases in a specified time period followed by a decrease at a specified rate in the MRSI. If there is no decrease in the MRSI, then delivery of ablation energy to tissue continues. However, if there is a decrease in the MRSI within a specified time and at a specified rate, then the method infers the formation of a steam pocket and decreases or discontinues the delivery of ablative energy to tissue.