Pulse oximetry methods and apparatus for use within an auditory canal
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United States of America Patent
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-
Sep 12, 2006
Grant Date -
Mar 3, 2005
app pub date -
May 17, 2004
filing date -
Aug 25, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods and apparatus for detecting oxygen saturation levels in blood from within an auditory canal of a living being proximal to a tympanic membrane are disclosed. The auditory canal is lined with tissue and includes a proximal bend and a distal bend located between the proximal bend and the tympanic membrane. Oxygen levels are detected by emitting one or more wavelengths of light into a first position on the tissue of the auditory canal in a first region defined by the distal bend and the tympanic membrane. The wavelengths of light are then sensed at a second position on the tissue of the auditory canal in the first region. A blood oxygen saturation level and/or pulse rate is then calculated responsive to intensity information corresponding to the wavelengths of light detected at the second position.
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