Vibratory venous and arterial oximetry sensor
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United States of America Patent
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Sep 20, 2005
Grant Date -
Nov 18, 2004
app pub date -
Dec 12, 2003
filing date -
Dec 13, 2002
priority date (Note) -
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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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