Pulse spectrometer
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United States of America Patent
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Jun 4, 1996
Grant Date -
N/A
app pub date -
Sep 15, 1994
filing date -
Sep 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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