US Patent 6947781 Vibratory venous and arterial oximetry sensor
Patent 6947781 was granted and assigned to Massachusetts Institute of Technology on September, 2005 by the United States Patent and Trademark Office.
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Patent abstract
A method and an apparatus for distinguishing concentrations of blood constituents among distinct vascular components in situ. The method has steps of inducing periodic vibration, characterized by a frequency, in a limb of a person in such as manner as to selectively excite a resonant response in a specified blood vessel of the person, an artery or a vein, illuminating the limb of the person with a light source, and synchronously detecting a plethysmographic signal for discriminating response attributable to the specified blood vessel.
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Patent Inventor Names
Haruhiko H. Asada0
Phillip Shaltis0
Date of Patent
September 20, 2005
0Patent Application Number
107347320
Date Filed
December 12, 2003
0Patent Primary Examiner
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US Patent 6947781 Vibratory venous and arterial oximetry sensor
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