The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 1996
Filed:
Sep. 15, 1994
Muneharu Ishikawa, Tsukuba, JP;
Koji Katayama, Tsukuba, JP;
Kowa Company Ltd., , JP;
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.