Spectroscopy illuminator with improved delivery efficiency for high optical density and reduced thermal load
First Claim
1. A method of monitoring tissue oxygenation comprising the steps of:
- (a) placing an oximeter probe on, in or near a tissue at a mucosal or subsurface tissue site;
(b) illuminating the tissue with a broadband visible illumination from a broadband illumination source;
(c) monitoring broadband light returning from the tissue site, at least a portion of said broadband light having wavelengths from 400 to 700 nm; and
(d) determining a tissue oxygenation index based upon said broadband light.
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Accused Products
Abstract
An improved illuminator for generating broadband light, and for delivering the light to a sample with an improved delivery efficiency, for higher optical density and/or reduced thermal transfer, than achieved with conventional halogen bulb sources. The illuminator enables spectroscopic analysis in thermally-sensitive or spatially-constrained environments. A phosphor-coated broadband white LED and integrated collimating optics produces a continuous, collimated broadband light beam from 400 nm to 700 nm, which is then transmitted through space to a sample region, such as a living tissue in vivo. A method and system for measuring oxigeneration of mucosal or subsurface tissue is also described.
45 Citations
11 Claims
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1. A method of monitoring tissue oxygenation comprising the steps of:
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(a) placing an oximeter probe on, in or near a tissue at a mucosal or subsurface tissue site; (b) illuminating the tissue with a broadband visible illumination from a broadband illumination source; (c) monitoring broadband light returning from the tissue site, at least a portion of said broadband light having wavelengths from 400 to 700 nm; and (d) determining a tissue oxygenation index based upon said broadband light. - View Dependent Claims (2, 3)
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4. A method of monitoring tissue oxygenation comprising the steps of:
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(a) illuminating a tissue with a broadband visible illumination source having shallow-penetrating wavelengths shorter than 600 nm; (b) monitoring shallow-penetrating broadband visible light returning from a mucosal or subsurface tissue site; and (c) determining a tissue hemoglobin oxygenation index based upon said returning light. - View Dependent Claims (5, 6, 7, 8)
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9. A visible wavelength optical spectroscopy tissue oximeter system comprising:
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(a) a broadband, low-thermal-transfer visible illumination source for illuminating a target region; (b) an optical collector for collecting broadband light scattered from said target region and for transmitting a collected signal to a spectroscopic monitor; and (c) spectroscopic monitoring means for receiving and analyzing collected broadband visible light as a function of wavelength, said receiving and analyzing substantially reliant upon received light with a wavelength below 600 nm so as to achieve a shallow, subsurface depth of penetration, and for determining an oxygen saturation index of hemoglobin in said target region based upon said monitored shallow penetrating visible light. - View Dependent Claims (10, 11)
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Specification