Probe and apparatus for determining concentration of light-absorbing materials in living tissue
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United States of America Patent
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Dec 30, 2003
Issued Date -
N/A
app pub date -
Oct 20, 2000
filing date -
Jul 17, 1998
priority date (Note) -
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Abstract
A probe 1 includes a light irradiating device 2 and a light receiving device 3, which are oppositely disposed sandwiching living tissue 10. The light irradiating device 2 includes a light source 5 and a scattering plate 6 located in front of the light source 5. The light receiving device 3 includes a photo diode 8 and a light scattering portion. With such an arrangement, of the attenuation of the living tissue 10, non-absorbing attenuation is free from the wavelength. A ratio of absorbing attenuation and a thickness of a blood layer is not affected by a thickness of living tissue. Further, the absorbing attenuation is not dependent on a depth of the blood layer.
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