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Pulse and active pulse spectraphotometry
   
Document Number
US Patent 6961598
Issued Date
November 1, 2005
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Inventors
Diab; Mohamed K. (Mission Viejo, CA)
Map
Abstract
A pulse and active pulse spectraphotometry system comprises a light source adapted to illuminate a tissue site with optical radiation having a plurality of wavelengths selected from at least one of a primary band and a secondary band. The tissue site has a modulated blood volume resulting from the pulsatile nature of arterial blood or from an induced pulse. A detector is configured to receive the optical radiation attenuated by the tissue site and to generate a detector output responsive to absorption of the optical radiation within the tissue site. A normalizer operating on the detector output generates a plurality of normalized plethysmographs corresponding to the plurality of wavelengths. Further, a processor is configured to calculate a ratio of fractional volumes of analytes in the blood volume based upon the normalized plethysmographs.
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Number of Claims:
21
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Owner
Masimo Corporation (Irvine, CA)
Published
November 1, 2005
Application Number
10/371,968
Filed
February 21, 2003
US Classification
600/310   600/316 600/322
Int'l Classification
A61B   5/00   (20060101)  
Examiner
Parent Case
REFERENCE TO RELATED APPLICATION The present application claims priority benefit under 35 U.S.C. .sctn.119(e) from U.S. Provisional Application No. 60/358,809, filed Feb. 22, 2002, entitled "Pulse and Active Pulse Spectraphotometry," which is incorporated herein by reference.
USPTO Field of Search
600/310   600/316   600/322   600/323   600/330   600/335  
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Description
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