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US 5,522,388 AGranted
Pulse spectrometer
AssigneeKowa Company, Ltd.
InventorsMuneharu Ishikawa, Koji Katayama
Life of this patent
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AssigneeKowa Company, Ltd.
InventorsMuneharu Ishikawa, Koji Katayama
Estimating the term…
A pulse spectrometer for noninvasively determining the concentration of blood constituents in in vivo tissue comprises a pressure application device for applying pressure to a measurement region of the in vivo tissue and a light source for irradiating the measurement region of the in vivo tissue with light. A spectroscope separates light transmitted from the measuring region into its spectral components, and a first light-receiving element receives the spectral components. A second light-receiving element receives scattered light from a vicinity of the measurement region. A control device controls the pressure which is applied on the measurement region by the pressure application device based on a signal obtained from the second light-receiving element. A signal separator separates a blood flow variation component from the spectral components received by the first light-receiving element based on the signal from the second light-receiving element.
A pulse spectrometer for noninvasively determining the concentration of blood constituents in in vivo tissue by irradiating a measurement region of the in vivo tissue with light and spectroscopically analyzing light from the in vivo tissue, the pulse spectrometer comprising:
A pulse spectrometer for noninvasively determining the concentration of blood constituents in in vivo tissue, the pulse spectrometer comprising:
Dependencies are inferred from the claim text.