Pulse spectrometer

Details Pulse spectrometer Pulse spectrometer

1994-09-15

1996-06-04

Sykes, Angela D.

Stone working

Turning

Grinding-wheel dressing

356 39, A61B 500

Patent

active

055223885

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.

REFERENCES:
patent: 4869261 (1989-09-01), Penaz
patent: 4883353 (1989-11-01), Hausman et al.
patent: 4927264 (1990-05-01), Shiga et al.
patent: 5111817 (1992-05-01), Clark et al.
patent: 5313941 (1994-05-01), Braig et al.
patent: 5372135 (1994-12-01), Mendelson et al.

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