Apparatus and method for non-invasive and minimally-invasive sensing of parameters relating to blood
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United States of America Patent
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Jun 29, 2010
Grant Date -
Nov 9, 2006
app pub date -
Sep 22, 2005
filing date -
Mar 30, 2005
priority date (Note) -
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Abstract
Medical diagnostic system, apparatus and methods are disclosed. Optical transmitters generate radiation-containing photons having a specific interaction with at least one target chromophore in a target structure, preferably a blood vessel such as the interior jugular vein. The optical transmitters transmit the radiation into at least a first area including a substantial portion of the target structure and into a second area not including a substantial portion of the target structure. Optical receivers detect a portion radiation scattered from at least the first area and the second area. A processor estimates oxygenation, pH or cardiac output based on the scattered radiation detected from the first area, and the scattered radiation from the second area.
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