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Optical lesion assessment

An optical, optical sensing technology used in invasive medical devices and medical surgery to solve problems such as dangerous tissue damage

Pending Publication Date: 2021-09-03
BIOSENSE WEBSTER (ISRAEL) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, an excessive dose can cause dangerous damage to the tissue at or around the ablation site

Method used

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  • Optical lesion assessment
  • Optical lesion assessment
  • Optical lesion assessment

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Embodiment Construction

[0025] Embodiments of the invention described below provide devices and methods that can be used to quickly and accurately assess tissue conditions within the body by comparing the intensity at different wavelengths scattered from the tissue. In particular, the inventors have discovered that as tissue within the body is ablated, the relationship between infrared and visible light scattered from the tissue, and in particular cardiac tissue, changes significantly, with the ratio of scattered infrared to visible light increasing dramatically. A suitable optical sensing unit in the ablation probe, such as in an ablation catheter of the heart, can thus be used to assess lesion formation in real time during the ablation procedure. The term "scatter" as used in this disclosure and claims generally includes reflected and transmitted radiation in its broad, conventional sense, which reaches the optical sensor via the tissue under consideration, or in other words forward and backscatter...

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Abstract

The invention relates to optical lesion assessment. A medical device is disclosed herein, which includes a probe having a distal section configured for insertion into a body of a patient. The probe includes at least one optical sensing unit disposed along the distal section and including a first radiation source and a second radiation source, the first and second radiation sources are configured to emit optical radiation of different respective first and second wavelength bands toward tissue within the body proximate the distal section. An optical sensor is configured to receive optical radiation scattered from the tissue at the first wavelength band and the second wavelength band, and to output first and second electrical signals in response to an intensity of the received optical radiation.

Description

[0001] This application is a divisional application of a patent application submitted on December 17, 2013, with application number 201310692975.0, and the title of the invention is "Evaluation of Optical Ablation Lesion". [0002] Cross references to related patent applications [0003] This patent application is a continuation-in-part of US Patent Application 12 / 816,492 filed June 16, 2010 and published as US Patent Application Publication 2011 / 0313280, the disclosure of which is incorporated herein by reference. technical field [0004] The present invention relates generally to invasive medical devices and medical procedures, and in particular to the assessment of the condition of tissue treated with such procedures. Background technique [0005] Minimally invasive intracardiac ablation is the treatment of choice for various types of arrhythmias. To perform this type of treatment, a physician typically inserts a catheter into the heart through the vasculature, brings th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B18/12
CPCA61B5/0086A61B2017/00066A61B2018/1407A61B5/6855A61B5/02007A61B5/4836A61B2562/043A61B2218/002F04C2270/041A61B5/0084A61B18/1492A61B5/6852A61B5/0036
Inventor A.戈瓦里C.T.比克勒A.帕派奥安瑙V.格里纳
Owner BIOSENSE WEBSTER (ISRAEL) LTD